Group: Applied Systems Part Number: IM ... - Daikin...

Installation and Maintenance IM 696-3

Group: Applied Systems

Part Number: IM 696

Date: December 2004

© 2004 Daikin Applied

MicroTech® IIApplied Rooftop Unit Controller

• Used with Daikin models: RPS, RFS, RCS, RDT, RPR, RFR, RPE,RDE, RCE, RDS, RAR & RAH

Discharge CoolingDisch Air= 55.0°FClg Capacity= 50%Eff Clg Spt= 55°F

Contents

Daikin and MicroTech II are registered trademarks of Daikin Applied . Microsoft is a registered trademark of Microsoft Corporation.

Windows is a trademark of Microsoft Corporation.Copyright © 2004 Daikin Applied . All rights reserved throughout the world.

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Component Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Main Control Board (MCB) . . . . . . . . . . . . . . . . . . . . . . . 4Analog Inputs Terminal Blocks . . . . . . . . . . . . . . . . . . . . 5Binary Inputs Terminal Blocks . . . . . . . . . . . . . . . . . . . . . 5Binary Outputs Terminal Blocks . . . . . . . . . . . . . . . . . . . 5RS-485 Communications Terminal Block . . . . . . . . . . . . 5Power Supply Terminals . . . . . . . . . . . . . . . . . . . . . . . . . 5Keypad/LCD Display Connection . . . . . . . . . . . . . . . . . . 5Communication Modules . . . . . . . . . . . . . . . . . . . . . . . . . 5BACnet/IP Communication Module . . . . . . . . . . . . . . . . . 5BACnet MS/TP Communications Module . . . . . . . . . . . . 6LonWorks® Communication Modules . . . . . . . . . . . . . . . 6RS-232 Connection Port . . . . . . . . . . . . . . . . . . . . . . . . . 715 VDC Supply Connection . . . . . . . . . . . . . . . . . . . . . . . 7Main Control Board LEDs . . . . . . . . . . . . . . . . . . . . . . . . 7Auxiliary Control Boards (CCB1, CCB2, EHB1, and ERB1) . . . . . . . . . . . . . . . . . . 8Analog Inputs Terminal Block (J8) . . . . . . . . . . . . . . . . . 9Binary Inputs Terminal Blocks (J9 and J10) . . . . . . . . . . 9Binary Outputs Terminal Blocks . . . . . . . . . . . . . . . . . . . 9RS-485 Communications Module . . . . . . . . . . . . . . . . . . 9Power Supply Terminals (J1) . . . . . . . . . . . . . . . . . . . . . 9J7 Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9J2 Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Main Control Board (MCB)

Output Relays and Triacs . . . . . . . . . . . . . . . . . . . . . . 9Auxiliary Control Boards (CCB1, CCB2,

GCB1, EHB1, and ERB1) Output Relays . . . . . . . . 10Keypad/Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Remote Keypad Display Option . . . . . . . . . . . . . . . . . . 10Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 11Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . 11Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Variable Frequency Drives (VFDs) . . . . . . . . . . . . . . . . 11

Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Field Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Remote Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . 12Fan Operation Output . . . . . . . . . . . . . . . . . . . . . . . . . . 12VAV Box Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Cooling Only Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Cooling Only Units with Field Supplied Heat . . . . . . . . . 13Units with One-Stage Heat . . . . . . . . . . . . . . . . . . . . . . 13Units with Modulating Heat . . . . . . . . . . . . . . . . . . . . . . 14Staged Cooling Outputs . . . . . . . . . . . . . . . . . . . . . . . . 14

Field Analog Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Zone Temperature Sensor Packages . . . . . . . . . . . . . . 14Zone Sensor without Remote Set Point Adjustment . . . 14Zone Sensor with Remote Set Point Adjustment . . . . . 15Tenant Override (Timed) . . . . . . . . . . . . . . . . . . . . . . . . 15External Discharge Air Reset Signal . . . . . . . . . . . . . . . 16External Outdoor Air Damper Reset Signal . . . . . . . . . . 16Field Valve Actuator Feedback . . . . . . . . . . . . . . . . . . . 17Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Humidity Sensor—Discharge Air Control (DAC) Unit . . 19

Field Binary Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Manual Cooling and Heating Enable . . . . . . . . . . . . . . . 19

Cooling Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Heating Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Manual Unit Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19External Time Clock or Tenant Override . . . . . . . . . . . . 19Miscellaneous Output Signals . . . . . . . . . . . . . . . . . . . . 20External Exhaust Fan Status . . . . . . . . . . . . . . . . . . . . . 20

Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Controller Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Analog Inputs-Main Control Board (MCB) . . . . . . . . . . . 21Analog Inputs—Auxiliary Control Boards

(CCB1, CCB2, GCB1, EHB1 & ERB1) . . . . . . . . . . . 23Binary Inputs—Main Control Board (MCB) . . . . . . . . . . 23Binary Inputs—Auxiliary Control Boards

(CCB1, CCB2, GCB1, EHB1 & ERB1) . . . . . . . . . . . 23CCB1 & CCB2 (7RPS, RFS/RCS, RDT,

RPR & RFR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23GCB1 (RDS & RAH) . . . . . . . . . . . . . . . . . . . . . . . . . . . 23EHB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23ERB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Controller Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Binary Outputs—Main Control Board (MCB) . . . . . . . . . 24Binary Outputs—Auxiliary Control Boards

(CCB1, CCB2, GCB1, EHB1 & ERB1) . . . . . . . . . . . 26CCB1 and CCB2 (RPS, RFS/RCS, RDT,

RPE, RDE, RCE, RPR, and RFR) . . . . . . . . . . . . . . 26GCB1 (RDS & RAH) . . . . . . . . . . . . . . . . . . . . . . . . . . . 31EHB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31EERB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Software Identification and Configuration . . . . . . . . . . . . . . . 32Main Control Board (MCB) Configuration . . . . . . . . . . . . . . . 32

Main Control Board (MCB) Data Archiving . . . . . . . . . . 33

Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 34Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Troubleshooting Main Control Board (MCB) . . . . . . . . . 59MCB Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59MCB Data Archiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59MCB “Cold” Reboot . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59MCB LED Power-Up Sequence . . . . . . . . . . . . . . . . . . . 59MCB LED Startup Error Codes . . . . . . . . . . . . . . . . . . . 61Battery Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Flash CRC Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62SRAM Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Communication Port Tests . . . . . . . . . . . . . . . . . . . . . . . 62IP Register Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Troubleshooting Auxiliary Control Boards

(CCB1, CCB2, GCB1, EHB1 and ERB1) . . . . . . . . . 63Hardware Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63RS-485 Communication Card Status LEDs . . . . . . . . . . 63Troubleshooting Keypad/Display . . . . . . . . . . . . . . . . . . 63Keypad/Display Power Up Initialization . . . . . . . . . . . . . 63Troubleshooting Temperature Sensors . . . . . . . . . . . . . 64Troubleshooting Communications Modules . . . . . . . . . . 65BACnet/IP Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65BACnet MS/TP Module . . . . . . . . . . . . . . . . . . . . . . . . . 65LonMark Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Troubleshooting Pressure Transducers . . . . . . . . . . . . . 66

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Introduction

Introduction

Rooftop unit control configuration

Operation manual bulletin number

Discharge Air Control (VAV or CAV)Space Comfort Control (CAV-zone temperature control)

Rooftop unit model Installation and maintenance data bulletin number

RPS/RDT/RFS/RCS 015-135CRPE/RDE/RCE (evaporative condensing units)RDS and RAH

NOTICE

WARNING

WARNING

CAUTION

CAUTION

CAUTION

This manual contains information regarding the MicroTech II® control system used in the Daikin® RoofPak® applied rooftop product line. It describes the MicroTech II components, input/output configurations, field wiring options and requirements, and service procedures.

For a description of operation and information on using the keypad to view data and set control parameters, refer to the appropriate program-specific operation manual, see Table 1. For installation and commissioning instructions and general information on a particular rooftop unit model, refer to its model-specific installation manual, refer to Table 2.

Table 1: Program-specific unit operation literature

OM-137-2

OM-138-2

Table 2: Model-specific rooftop unit installation literature

IM 738-1

IM 791-1

IM 487-4

This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with this instruction manual, it can interfere with radio communications. It has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause harmful interference; in which case users will be required to correct the interference at their own expense. Daikin Applied disclaims any liability resulting from any interference or for the correction thereof.

Electric shock hazard. Can cause personal injury or equipment damage.This equipment must be properly grounded. Connections and service to the MicroTech II control panel must be performed only by personnel knowledgeable in the operation of the equipment being controlled.

Excessive moisture in the control panel can cause hazardous working conditions and improper equipment operation.Protect the electrical components in the main control panel from precipitation.

Extreme temperature can damage system components.This MicroTech II controller is designed to operate in ambient temperatures from –40°F to 158°F. It can be stored in ambient temperatures from –65°F to 176°F. The controller is designed to operate in a 10% to 90% RH (noncondensing) and be stored in a 5% to 95% RH (noncondensing) environment.

Static sensitive components. A static discharge while handling electronic circuit boards can damage components.Discharge any static electrical charge by touching the bare metal inside the main control panel before performing any service work. Never unplug any cables, circuit board terminal blocks, relay modules, or power plugs while power is applied to the panel.

To prevent possible unit damage, before removing power to the controller, pump down compressor.

Daikin IM 696-4 1

General Description

General Description

The MicroTech II Applied Rooftop Unit Controller is a microprocessor-based controller designed to provide sophisticated control of Daikin RoofPak® applied rooftop units. In addition to providing normal temperature, static pressure, and ventilation control, the controller can provide alarm monitoring and alarm-specific component shutdown if critical system conditions occur.

The operator can access temperatures, pressures, operating states, alarm messages, control parameters, and schedules with an 8-key keypad and a 4-line by 20-character display. The controller includes password protection against unauthorized or accidental control parameter changes.

This MicroTech II controller is capable of complete, stand-alone rooftop unit control, or it can be incorporated into a building-wide network using an optional plug-in communication module. Available communication modules include BACnet®/IP, BACnet MS/TP, LONMARK® Space

Comfort Controller (SCC) and LONMARK Discharge Air Controller (DAC).

Component DataThe main components of the MicroTech II control system include the main control board (MCB), one or two optional auxiliary cooling control boards (CCB1, CCB2, or GCB1), an optional auxiliary electric heating control board (EHB1), an optional auxiliary energy recovery wheel control board (ERB1), and a keypad/display. These control components are located in the main control panel as shown in Figure 1 (smaller units), Figure 2 (larger units), and Figure 3. These components are interconnected by shielded multiconductor communication cables, or in the case of the keypad/display by a six conductor cable with an RJ-11 style modular connector. Transformers T2, T3 and T9 supply power to the system. The following pages contain descriptions of these components and their input and output devices.

Figure 1: Main control panel, RPS/RFS/RPR/RFR 15 to 40C and RDS/RAR 800 to 802C

2 Daikin IM 696-4

General Description

Figure 2: Main control panel, RPS/RFS/RPR/RDT 45 to 75C and RAH/RAR 47C

Figure 3: Main control panel, RPS/RFS/RPR/RDT 80 to 135C and RAH/RAR 77C

Daikin IM 696-4 3

General Description

Main Control Board (MCB)Figure 4 shows the main control board (MCB). It contains a microprocessor that is programmed with the main application code to control the unit. The MCB receives up to 16 analog and 16 binary inputs directly and up to 6 analog and 12 binary inputs from each optional auxiliary control board (CCB1,

CCB2, GCB1, EHB1, and ERB1). Auxiliary control boards communicate this data with the MCB via an RS-485 communication bus interface. The MCB controls its own 16 binary outputs and up to 9 binary outputs on each auxiliary board based on the inputs.

Figure 4: Main control board

(RS485)communications

terminal block

RJ-48 jack

Analog inputs terminal block

Binary outputsterminal block

Power supplyterminal

Binary inputsterminal blocks

BACnet/IPcommunication

moduleBACnet MS/TP

or L ON W ORKScommunication

module

4 Daikin IM 696-4

General Description

Analog Inputs Terminal BlocksThe MCB receives up to 16 analog input signals on four terminal blocks located on the left side of the board. From top to bottom, analog inputs AI1 through AI4 are terminated on the first terminal block, AI5 through AI8 on the second, AI9 through AI12 on the third, and AI13 through AI16 on the fourth. Each analog input has two terminals. The terminals for AI1 are 1 and 1C, the terminals for AI2 are 2 and 2C, and so forth. Refer to “Analog Inputs-Main Control Board (MCB)” on page 21 for details regarding analog inputs.

Binary Inputs Terminal Blocks

The MCB receives up to 16 binary input signals on three terminal blocks located on the top of the board. From right to left, binary inputs BI1 through BI6 are terminated on the first terminal block, BI7 through BI10 on the second and BI11 through BI16 on the third. Refer to “Binary Inputs—Main Control Board (MCB)” on page 23 for details regarding binary inputs.

Binary Outputs Terminal Blocks

The MCB controls up to 16 binary outputs when controlling the unit. The binary outputs either energize on-board electromechanical relays (BO1 through BO4, BO11 and BO12) or triacs (BO5 through BO10 and BO13 through BO16).

The unit control devices are wired to these relays or triacs through six output terminal blocks on the right side of the MCB. From top to bottom binary outputs BO1 and BO2 are terminated on the first terminal block, BO3 and BO4 on the second, BO5 through BO7 on the third, BO8 through BO10 on the fourth, BO11 through BO13 on the fifth, and BO14 through BO16 on the sixth.

Each binary output has three terminals. The terminals for BO1 are NO, 1, and NC, the terminals for BO2 are NO, 2, and NC, and so forth. Each binary output lights an LED when the output is active. Refer to “Binary Outputs—Main Control Board (MCB)” on page 24 for details regarding binary outputs.

RS-485 Communications Terminal Block

The MCB exchanges information with up to four optional auxiliary control boards via the RS-485 communication bus terminal block in the lower left corner of the MCB. This terminal block has four terminals, three of which are labeled REF, Minus, and Plus. These terminals connect the auxiliary boards to the RS-485 communication bus to interface them with the MCB.

If unit is equipped with and evaporative condenser and a VFD controlling the first condenser fan on each circuit (condenser fan #11 and #21), this VFD is also controlled via this RS-485 communication bus terminal block.

Power Supply Terminals

Transform T2 supplies 24 VAC power to the MCB on the 24V and COM terminals located at the upper right corner of the MCB.

Some of the binary outputs on the MCB drive 24 VAC pilot relays in the unit control circuit. 24 VAC to power these pilot relays is provide from transformer T3, through the SRC 1–8 and SRC 9–16 terminals located at the upper right corner of the MCB, and through the particular binary output contacts. Place the output jumper associated with these outputs in the SRC position. For detailed information regarding binary output jumpers, refer to “Binary Outputs—Main Control Board (MCB)” on page 24.

Keypad/LCD Display Connection

The keypad is connected to the main control board via a six-conductor cable connected to a modular jack located at the bottom of the MCB. This connects the keypad to the RS-485 communication bus interface with the MCB.

Communication ModulesIn systems that require networking, one of the following communications modules can be installed.

BACnet/IP Communication Module

A BACnet/IP Communication Module can be plugged into the MCB as shown in Figure 4 on page 4.

The BACnet/IP Communication Module is designed to be an add-on module to the MCB for networking to Building Automation and Control Network (BACnet) systems. It is a plug-in module that can be attached to the MCB via a 36-pin header, and includes four locking stand-offs to securely attach it to the board. The MicroTech II Applied Rooftop Unit Controller meets the requirements of ANSI/AHRAE 135-2001 standard for BACnet/IP per Annex J of the standard with a conformance level of 3.

For a detailed description and troubleshooting information regarding this communications module, refer to installation and maintenance bulletin IM 703, MicroTech II Applied Rooftop Unit Controller and Self-Contained Unit Controller BACnet Communication Module—BACnet / IP. For details regarding BACnet protocol data, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

A unit equipped with the optional BACnet/IP Communication Module is connected to an BACnet network through an eight-position RJ-48 style modular jack located on the bottom edge of the MCB. This connection is shown schematically in Figure 5 on page 7.

Daikin IM 696-4 5

General Description

BACnet MS/TP Communications Module

A BACnet MS/TP Communication Module can be plugged into the MCB as shown in Figure 4 on page 4.

The BACnet MS/TP Communication Module is designed to be an add-on module to the MCB for networking to Building Automation and Control Network (BACnet) systems. It is a plug-in module that can be attached to the MCB via a 12-pin header, and includes four locking stand-offs to securely attach it to the board. It allows the MCB to interoperate with systems that use the BACnet Master Slave/Token Passing (MS/TP) protocol with a conformance level of 3. The MicroTech II Applied Rooftop Unit Controller meets the requirements of ANSI/AHSRAE 135-2001 standard for BACnet systems.

For a detailed description and troubleshooting information regarding this communications module, refer to installation and maintenance bulletin IM 704, MicroTech II Applied Rooftop Unit Controller and Self-Contained Unit Controller BACnet Communication Module—BACnet / MS/TP. For details regarding BACnet protocol data, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

A unit equipped with the optional BACnet MS/TP Communication Module is connected to a BACnet network through terminals 128 (+) and 129 (-) on terminal block TB2 in the main control panel. These terminals are factory wired to the BACnet MS/TP module when the module is factory installed. When the module is field installed, the add on communication module kit includes a wiring harness to be installed between terminals 128 and 129 and the BACnet MS/TP module. This connection is shown schematically in Figure 5 on page 7.

LONWORKS® Communication Modules

A LONWORKS Communication Module can be plugged into the MCB as shown in Figure 4 on page 4. This module provides LONWORKS network communication capability to the MCB. It is a plug-in module that can be attached to the MCB via a 12-pin header, and includes 4 locking stand-offs to securely attach it to the board.

For a detailed description and troubleshooting information regarding this communications module, refer to installation and maintenance bulletin IM 702, MicroTech II Applied Rooftop Controller and Self-Contained Unit Controller LONWORKS Communication Modules. For details regarding LONMARK® protocol data for these modules, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

There are two versions of this module available. One is the LONMARK Space Comfort Controller (SCC) module and the other is the LONMARK Discharge Air Control (DAC) module.

Space Comfort Control (SCC) Module. The Space Comfort Controller (SCC) module supports the LonMark Space Comfort Controller (SCC) functional number 8500.

Discharge Air Control (DAC) Module. The Discharge Air Controller (DAC) Communication module supports the LONMARK Discharge Air Controller (DAC) functional number 8610.

A unit equipped with an optional LONWORKS Communication module can be connected to a LONWORKS network through terminals 128 (A), 129 (B) on terminal block TB2 in the main control panel. These terminals are factory wired to the module when the module is factory installed. When the module is field installed, the add-on communication module kit includes a wiring harness to be installed between terminals 128 and 129 and the module. This connection is shown schematically in Figure 5 on page 7.

6 Daikin IM 696-4

General Description

Figure 5: MCB communication interface

U n i t T e r m i n a l B l o c k T B 2

B A C

n e t- M

S T P C O

M M

. M

O D

U L E

5 2 2 ( C L R )

5 2 3 ( B L K )

5 2 2

5 2 3

B A C

n e t- IP

C O

M M

. M O

D U

L E

R J 4 5 M O D U L A R

J A C K

R S 2 3 2 P O R T ( D B - 9 M A L E )

S E R IA L C O M M . L O C A T E D O N D E A D F R O N T ( D B - 9 M A L E )

B A C n e t M S T P

L o n W o r k s

B A C n e t IP

M A IN C O N T R O L B O A R D ( M C B )

S E R V IC E T O O L

1 0 B A S E - T S T Y L E C O N N E C T IO N

1 2 8

1 2 9

1 2 8

1 2 9

RS-232 Connection Port

A PC loaded with MicroTech II Service Tool software can be connected directly or via a telephone modem to the RS-232 communications port located on the bottom edge of the MCB. This connection is shown schematically in Figure 5.

15 VDC Supply Connection

The two 15V terminals located above the analog input terminals blocks provide 15 VDC power. This power supply is not used in the rooftop controller application. This power supply is limited to 30 mA.

CAUTION

Main Control Board LEDs

There are a number of LEDs in various locations on the MCB. These LEDs consist of three groupings. There are 16 Binary Input (BI) LEDs located in the upper left corner of the MCB. These LEDs are lit when the corresponding Binary Input is turned ON. For information regarding the functions of the Binary Inputs refer to “Binary Inputs—Main Control Board (MCB)” on page 23. There are 16 Binary Output (BO) LEDs, one located next to each Binary Output on the right side of the MCB. These LEDs are lit when the corresponding Binary Output is turned ON. For information regarding the functions of the Binary Outputs refer to “Binary Outputs—Main Control Board (MCB)” on page 24. There are four miscellaneous LEDs located along the bottom of the MCB. These LEDs provide error code information and indication of activity on the various communication channels. Table 3 lists these LEDs with their functions.

LED function Location on MCB LED color

MCB error indication*RedOff Blinking

*Refer to “Troubleshooting Main Control Board (MCB)” on page 58.

This is an unregulated power supply and should not be used to feed three-wire potentiometer inputs.

Table 3: Main control board miscellaneous LEDs

RS-485 bus activity indication (LED is ON when activity present on the bus) Left of RS-485 port connector GreenRS-232 port activity indication (LED is ON when activity present at the port) Left of RS-232 port connector GreenBACnet/IP port activity Indication (LED is ON when activity present at the port) Left of BACnet/IP port connector Green

Right of BACnet/IP port connector

Normal Battery low or defective

Daikin IM 696-4 7

General Description

Auxiliary Control Boards (CCB1, CCB2, EHB1, and ERB1)There are up to four optional auxiliary control boards. These are the cooling control boards (CCB1 and CCB2 or GCB1), the electric heat control board (EHB1) and the energy recovery wheel control board (ERB1). Although the input and output functions on the four boards are defined differently in software, the boards are physically identical.

The CCB1 and CCB2 are used whenever a unit is equipped with a factory DX condensing unit (models RPS, RFS/RCS, RDT, RPR, RPE, RDE, RCE, and RFR). The GCB1 board, loaded with special generic cooling staging software, can also be used to control a field supplied condensing unit interfaced with an air handling unit (RDS or RAH) equipped with a DX

cooling coil. The CCB1 and CCB2 or GCB1 are not used on units equipped with chilled water or no cooling.

The EHB1 is used whenever a unit is equipped with more than one stage of electric heat. It is not used on units with single stage or modulating heat.

The ERB1 is used whenever a unit is equipped with an optional energy recovery wheel system.

A typical auxiliary control board is shown in Figure 6. This board receives up to 6 analog and 12 binary inputs and exchanges information with the MCB via an RS-485 communication bus.

Figure 6: Auxiliary control board (CCB1 board shown)

Binary inputs terminal block

Binary outputsterminal block (RS485)

communicationsterminal block

Analog inputs terminal block

8 Daikin IM 696-4

General Description

Analog Inputs Terminal Block (J8)

The auxiliary control board receives up to six analog input signals via the AI (J8) terminal block on the right side of the board.

Note – These analog inputs are only used on the ERB1 application. Refer to “Analog Inputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)” on page 23 for details regarding analog inputs.

Binary Inputs Terminal Blocks (J9 and J10)

The auxiliary control board receives up to 12 binary input signals via the BI (J9 and J10) terminal blocks on the right side of the board. BI1 through BI6 are located on terminal block J9 and BI7 through BI12 are located on terminal block J10. Refer to “Binary Inputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)” on page 23 for details regarding binary inputs.

Binary Outputs Terminal Blocks

The auxiliary control board includes nine binary output relays (BO1 through BO9) that are energized based on commands received from the MCB. These relays provide the appropriate switching actions for the control devices that are wired to them through the BO terminals on the left side of the board. Refer to “Binary Outputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)” on page 26 for details regarding binary outputs.

RS-485 Communications Module

Each auxiliary control board is equipped with a plug-in RS-485 Communication module. This module includes a three-position terminal block with terminals labeled N2+, N2- and REF. These terminals are wired to the +, - and REF terminals on the RS-485 communication terminal block on the MCB. The auxiliary control board exchanges information with the MCB via this interface.

Each auxiliary board RS-485 Communication module includes an 8-position dip switch assembly (SW1) for addressing the board. Refer to Figure 6 on page 8. The CCB1 must always be set to address 2, the CCB2 to address 3, the GCB1 to address 5, the EHB1 to address 4 and the ERB1 to address 6. This is done by setting the switches on each of the auxiliary control boards as indicated in Table 4. If the switches are not set as indicated, the MCB will not communicate correctly with the board and it will not function properly.

Auxiliary control board

(address)

Dip switch #

1 2 3 4 5 6 7 8

Power Supply Terminals (J1)

Either transformer T9 (CCB1 and CCB2) or T3 (GCB1, EHB1, and ERB1) supplies 24 VAC power to terminal block J1, terminals 1 (24VAC) and 2 (COM) on the auxiliary control board.

J7 Terminal Block

The J7 terminal block located at the top of the auxiliary control board is not used in this product application.

J2 Terminal Block

The J2 terminal block located between the J10 and J8 terminal block on the right side of the auxiliary control board is not used in this product application.

Main Control Board (MCB) Output Relays and TriacsBinary outputs BO1 through BO4, BO11, and BO12 control pilot duty Form C electromechanical relays mounted on the MCB. The output terminals of these relays are connected to a set of binary output terminal blocks located right side of the MCB. These relays are designed for Class 2 operation and to switch loads with either of the following characteristics:• 5VDC @ 10 mA minimum, 1 A maximum• 30 VAC @ 2 A nominal, 10 A inrush

Binary outputs BO5 through BO10 and BO13 through BO16 control triacs mounted on the MCB. The output terminals of these triacs are connected to a binary output terminal block located on the right side of MCB. These triacs are designed to switch loads with either of the following characteristics:• 20 mA minimum, 24 VAC @ 1 A maximum (with a total

load current from all triacs not to exceed 2.8 A, TBV).

Table 4: Auxiliary control board address switches

CCB1 (2) Up Down Up Up Up Up Up UpCCB2 (3) Down Down Up Up Up Up Up UpEHB1 (4) Up Up Down Up Up Up Up UpGCB1 (5) Down Up Down Up Up Up Up UpERB1 (6) Up Down Down Up Up Up Up Up

Daikin IM 696-4 9

General Description

Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1, and ERB1) Output RelaysBinary outputs BO1 and BO2 control high power Form A electromechanical relays mounted on the auxiliary control board. The output terminals of these relays are connected to the binary output terminals located on the left side of the auxiliary control board. These relays are designed to switch loads with either of the following characteristics:• 1 hp 120 VAC• 25 A resistive @ 120 VAC

Note – For this product application, place both jumpers on theboards just below the upper right corner of the RS-485 Communication Card on the right most pins. If these are not positioned correctly, the devices controlled by binary outputs BO1 and BO2 will not function properly.

Binary outputs BO3 through BO5 and BO7 through BO9 control low power Form A electromechanical relays mounted on the auxiliary control board. The output terminals of these relays are connected to the binary output terminals located on the left side of the auxiliary control board. These relays are designed to switch loads with either of the following characteristics:• 1/10 hp 120 VAC• 5 A resistive @ 120 VAC

Binary output BO6 controls one low power Form C electromechanical relay mounted on the auxiliary control board. The output terminals of this relay are connected to the binary output terminals located on the left side of the auxiliary control board. This relay is designed to switch loads with either of the following characteristics:• 1/10 hp 120 VAC• 5 A resistive @ 120 VAC

Keypad/DisplayThe keypad/display, shown in Figure 7 on page 10, has eight keys and a 4-line by 20-character LCD display. The keypad/display is the operator interface to the MCB. All operating conditions, system alarms, control parameters, and schedules can be monitored from the keypad/display. If the correct password is entered, adjustable parameters or schedules can be modified. For information on using the, keypad/display refer to the “Getting Started” section of the applicable operation manual (Refer to Table 1 on page 1).

Figure 7. Keypad/display

Remote Keypad Display OptionA unit may be equipped with a remote keypad/display option. When this is the case, either the local unit keypad/display or the remote keypad/display is active. When the selector switch on the remote keypad/display control board in the unit is switched to the “local” setting, the local keypad/display is active and the remote keypad/display is disabled (the “local” LED on the board is ON and the “remote” LED on the board is OFF). When the selector switch is switched to the “remote” setting, the remote keypad/display is active and the local keypad/display is disabled (the “local” LED on the board is OFF and the “remote” LED on the board is ON).

Note – When the selector switch position is changed, the selected keypad/display goes through the “normal” power up sequence before becoming active. Generally this takes about 60 seconds.

The operation of the remote keypad is identical to that of the local keypad/display as described in the appropriate operation manual for the unit. Refer to Table 1 on page 1.

WARNINGUnit can be started from a remote location. Severe personal injury or death can occur.When the remote keypad is enabled, the unit can be started from a remote location. Before servicing unit, make sure the keypad/display selector switch is in the “local” position (“local” LED on the remote keypad/display control board is ON and the “remote” LED is OFF) or that remote keypad is physically disconnected. If the local unit keypad/display is blank, assume that the remote keypad display is enabled.

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General Description

Temperature SensorsThe MicroTech II controller uses passive positive temperature coefficient (PTC) sensors. These sensors vary their input resistance to the MCB as the temperature changes. Resistance versus temperature information is included in “Troubleshooting Temperature Sensors” on page 63.

Pressure TransducersThe MicroTech II controller uses 0 to 5" w.c., 1 to 6 VDC static pressure transducers for measuring duct static pressure. If building static pressure control is provided, a –0.25" w.c. to 0.25" w.c., 1 to 5 VDC static pressure transducer is used. Voltage-to-pressure conversion data is included in “Troubleshooting Pressure Transducers” on page 65.

Humidity SensorsThe MicroTech II controller uses 0–100% RH, 0–5 VDC humidity sensors. Refer to “Humidity Sensors” on page 18 for details regarding these sensors.

ActuatorsThe MicroTech II controller uses floating-point (tri-state) control actuators for valve and damper modulation.

Spring-return actuators are used for the cooling and heating valves and mixing dampers (outside air and return air). All cooling and heating valves are normally open and the mixing dampers are normally closed to the outside air. On units equipped with face and bypass (F&BP) dampers, a spring-return, two-position end-of-cycle (EOC) valve is used to prevent overheating or overcooling when the dampers are in the full bypass position. All EOC valves are normally open.

The controller senses position feedback in the form of 0–5 VDC signals through 0–500 ohms potentiometers on the heating and cooling valve and mixing damper actuators. The MCB uses these feedback signals to display cooling or heating capacity, mixing damper position and discharge and return fan capacity.

Note – Face and bypass damper actuators are not equipped with feedback to the controller. When a unit is equipped with chilled water cooling with face and bypass or hot water or steam heating with face and bypass, the cooling or heating capacity is calculated by the MCB based on drive open versus drive close time of the actuator.

Variable Frequency Drives (VFDs)When controlling discharge, return, or exhaust fan variable frequency drives, the MicroTech II controller uses floating-point (tri-state) output signals to modulate the drive speed.

Speed feedback is supplied to the controller via a 0–10 VDC signal from the VFD. The MCB uses these feedback signals to display discharge and return fan capacity.

Daikin IM 696-4 11

Field Wiring

Field Wiring

Below are descriptions of the various options and features that may require field wiring to the MicroTech II controller. Refer to the job plans and specifications and the as-built wiring schematics. For a typical set of wiring schematics, refer to “Typical Wiring Diagrams” on page 34.

For more information on the electrical installation, refer to “Field Control Wiring” in the “Electrical Installation” section of the applicable unit installation manual (see Table 2 on page 1).

Field Output SignalsThe following output signals may be available for field connections to a suitable device:• Remote Alarm Output (MCB-BO4)• Fan Operation Output (MCB-BO3)• VAV Box Output (MCB-BO12)• Generic condensing unit staged cooling outputs

(GCB1–BO1 through GCB1–BO9)

The Remote Alarm Output and Fan Operation Output are available on all units. The VAV Box Output is available only on VAV units. The optional staged cooling outputs are available only on RDS and RAH units interfaced to a field-supplied condensing unit.

Remote Alarm OutputThe Remote Alarm Output (MCB-B04) supplies 24 VAC to terminal 115 on the field terminal block (TB2) when the output is on. To use this signal, wire the coil of a field supplied and installed 24 VAC pilot relay across terminals 115 and 117 on TB2. When this output is on, 24 VAC is supplied from the T3 control transformer through output relay MCB-B04 to energize the field relay. Refer to the as-built wiring diagrams.

CAUTION

The action of this output depends on the setup of each of the possible alarms. The output is on continuously (field relay energized) when there are no active alarms within the unit controller. Each alarm is then configured to cause the output to turn off, blink on and off rapidly, blink on and off slowly, or remain on (no alarm indication). For details regarding how to use the keypad to configure these alarms, refer to the “Alarm Monitoring” section of the applicable operation manual (see Table 1 on page 1).

Fan Operation OutputThe Fan Operation Output (MCB-B03) supplies 24 VAC to terminal 116 on the field terminal block (TB2) when the output is on. To use this signal, the coil of a field supplied and installed 24 VAC pilot relay must be wired across terminals 116 and 117 on TB2. When the output is energized, 24 VAC is supplied from the T3 control transformer through output relay MCB-B03 to energize the field relay. Refer to the as-built wiring diagrams.

CAUTION

The Fan Operation Output (MCB-BO3) can be used to control field equipment that depends on fan operation (field installed isolation dampers, VAV boxes, etc.) This output is turned on at the beginning of the Startup operating state and remains on during fan operation. The fans remain off during the Startup operating state allowing time for equipment such as isolation dampers to open prior to the starting of the fan. The duration of the Startup operating state is adjustable by setting the Start Init= parameter in the Timer Settings menu on the keypad. When the unit is shut off this output remains on for 30 seconds after the airflow switch stops sensing airflow. This output is on whenever the airflow switch senses airflow.

Note – If the DF CapCtrl= parameter in the Unit Configuration menu of the keypad is set to “Position,” the output turns off three minutes after the unit shuts off and remains off until the unit is restarted. For more details regarding the sequence of this output, refer to the applicable operation manual (see Table 1 on page 1).

The total VA of all field-mounted relays cannot exceed 15 VA, and they must have a 24 VAC Class 2 coil. Other power can cause unit malfunction.


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Field Wiring

VAV Box OutputThe VAV Box Output (MCB-B012) supplies 24 VAC to terminal 118 on the field terminal block (TB2) when the output is on. To use this signal, the coil of a field supplied and installed 24 VAC pilot relay must be wired across terminals 118 and 117 (units with inlet guide vanes) or 119 and 117 (units with VFDs) on TB2. When the output is energized, 24 VAC is supplied from the T3 control transformer through output relay MCB-B012 to energize the field relay. Refer to the as-built wiring diagrams or to “Auxiliary VFD control” on page 48.

CAUTION

The VAV Box Output (MCB-BO12) is designed to coordinate unit operation with VAV box control. Field use of this output is optional; however, it is highly recommended, especially for VAV systems that have heating capability (unit or duct mounted).

The following are application guidelines for four basic heating configurations. For all of these configurations, the VAV Box Output (MCB-BO12) is off for an adjustable time period after unit start-up (default is 3 minutes). During this period (the Recirc operating state), heating and cooling is disabled, and the outside air damper is held closed. The fans circulate building air and equalize space, duct, and unit temperatures.

Cooling Only Units

For cooling only VAV systems, the VAV Box Output can override zone thermostat control and drive the VAV boxes fully open to facilitate air circulation during the Recirc operating state. During this time, the VAV Box Output is in the OFF (or heat) position (field-installed pilot relay de-energized).

VAV units have a “post heat” control feature that forces the discharge air volume to a minimum before turning on the VAV Box Output when the Recirc operating state is complete. Post heat operation prevents excessive duct static pressure that could otherwise occur when the zone thermostats regain VAV box control.1

When the unit is not in the Startup or Recirc operating state and “post heat” is not active, the VAV Box Output is in the ON

(or cool) position (field relay energized) so that the zone thermostats control the VAV boxes.

The field-supplied fan operation and VAV box relay contacts can be wired in series so that the boxes open when the unit is not operational.

Cooling Only Units with Field Supplied Heat

For VAV systems with cooling only rooftop units and duct mounted reheat coils, the VAV Box Output can override zone thermostat control and drive the VAV boxes fully open when heating is required. If necessary, the MicroTech II controller energizes the fans for night setback and morning warm-up heating operation. When this occurs, the unit enters and remains in the UnocFanO or MWU operating state until heat is no longer required. The temperature control sequences are the same as those for units with factory-supplied heating equipment. While the unit is in these states, the VAV Box Output is in the OFF (or heat) position (field-supplied pilot relay de-energized).

VAV units have a “post heat” control feature that forces the discharge air volume to a minimum before closing the VAV box output when the heating period is complete. “Post heat” operation prevents excessive duct static pressure that could otherwise occur when the zone thermostats regain VAV box control.1

When the unit is not in the Startup, Recirc, or any heating operating state and “post heat” is not active, the VAV Box Output is in the ON (or cool) position (field-supplied pilot relay energized) so that the zone thermostats control the boxes.

The field supplied fan operation and VAV box relay contacts can be wired in series so that the boxes open when the unit is not operational.

Units with One-Stage Heat

The VAV Box Output should be used to override zone thermostat control and drive the VAV boxes fully open when heating is required. While the unit is in Startup, Recirc, or any heating operating state (UnocHtg, MWU, or Heating), the VAV Box Output is in the OFF (or heat) position (field-installed pilot relay de-energized).

VAV units have a “post heat” control feature that forces the discharge air volume to a minimum before closing the VAV Box Output when the unit leaves the Recirc or any other heating operating state. “Post heat” operation prevents excessive duct static pressure conditions that could otherwise occur when the zone thermostats regain VAV box control.1

When the unit is not in Startup, Recirc, or any other heating state and post heat operation is not active, the VAV Box Output is in the ON (or cool) position (field-supplied pilot relay energized) so that the zone thermostats control the boxes.

The field-supplied fan operation and VAV box relay contacts can be wired in series so that the boxes open when the unit is not operational.


1. The setting of a “post heat” timer determines theduration of post heat operation. This timer is set tozero at the factory and must be set to a non-zerovalue to enable the “post heat” function. For moreinformation on post heat operation, refer to “PostHeat Operation” in the “Discharge Fan AirflowControl” section of the applicable VAV operationmanual (see Table 1 on page 1).

Daikin IM 696-4 13

Field Wiring

Units with Modulating Heat

The VAV Box Output should be used to switch the VAV boxes between heating and cooling control. While the unit is in Startup, Recirc, or any heating operating state (UnocHtg, MWU, or Heating), the VAV Box Output is in the OFF (or heat) position (field-installed pilot relay de-energized) switching the VAV boxes into heating operation.

VAV units have a “post heat” control feature that forces the discharge air volume to a minimum before closing the VAV Box Output when the unit leaves Recirc or any other heating operating state. “Post heat” operation prevents excessive duct static pressure that could otherwise occur when the zone thermostats regain VAV box control.1

When the unit is not in Startup, Recirc, or any other heating operating state, the VAV Box Output is in the ON (or cool) position (field-supplied pilot relay energized) switching the boxes to cooling control.

Staged Cooling OutputsModel RDS and RAH rooftop air handlers can be ordered with factory-installed evaporator coils and the capability to control up to eight stages of field-supplied cooling equipment. The MicroTech II outputs designated for these applications are GCB1-BO1 through GCB1-BO8. These outputs are wired to terminal block TB4 in the main control panel for connection to the field supplied condensing unit. Refer to the as-built wiring schematics for the unit or to Figure 25 on page 56.

As the controller increases cooling capacity, it sequentially energizes the relays in ascending order. As the controller decreases cooling capacity, it sequentially de-energizes the relays in descending order. Refer also to Table 19 on page 31.

Field Analog Input Signals

Zone Temperature Sensor PackagesTable 5 lists the two zone (space) temperature sensor packages that are available for use with applied rooftop units equipped with a MicroTech II controller. A zone temperature sensor (ZNT1) is optional for all rooftop units except for the 100% outdoor air CAV-ZTC (SCC) unit in which case one is required. In all unit configurations, however, a zone temperature sensor is required to take advantage of any of the following standard controller features:• Unoccupied heating or cooling• Pre-occupancy purge• Discharge air reset based on space temperature (DAC units

only)• Timed tenant override• Remote set point adjustment (CAV-ZTC units only)

Daikin part no.

Tenant override switch

Remote set point

adjustment

For use with

DAC CAV-ZTC (SCC)

111048101 Yes No X X111048102 Yes Yes X

Zone Sensor without Remote Set Point Adjustment

The standard MicroTech II room temperature sensor package that does not include set point adjustment can be used with any applied rooftop MicroTech II control configuration. It includes a tenant override button.

This zone sensor must be field installed and field-wired to the unit using twisted pair, shielded cable (Belden 8761 or equivalent). Figure 8 shows the required wiring termination points.

Table 5: MicroTech II zone temperature sensors

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Field Wiring

Zone Sensor with Remote Set Point Adjustment

The standard MicroTech II room temperature sensor package equipped with a set point adjustment potentiometer is available to use with CAV-ZTC (SCC) units. This sensor package also includes a tenant override button. The set point adjustment potentiometer is wired across analog input MCB-AI2. The set point varies from 52°F to 83.2°F as the resistance changes from 0–1660 ohms.

This zone sensor package must be field installed and field wired to the unit using twisted, shielded cable. Four conductors with a shield wire are required. Cable with 22 AWG conductors (Belden 8761 or equivalent) is sufficient. Figure 9 shows the required wiring termination points.

CAUTION

Figure 8. Zone sensor with tenant override

WALLSTAT

3

4

120

ZNT1 ZONE SENSOR

Shield Wire

OVERRIDE121

INPUT

GND.

Unit TerminalBlock TB2

Figure 9. Zone sensor with tenant override and remote set point adjustment

WALLSTAT

3

4

120

ZNT1 ZONE SENSOR

Shield Wire

1326 COOLING & HEATING

SETPOINT

OVERRIDE121

INPUT

GND.

INPUT

Unit TerminalBlock TB2

Tenant Override (Timed)The tenant override button provided with the two optional zone temperature sensor packages can be used to override unoccupied operation for a programmed time period. This time period is adjustable between 0 and 5 hours using the TntOvrd= parameter in the Timer Settings menu of the keypad/display (default is 2 hours). Except for the fact that it is temporary, tenant override operation is identical to occupied operation.

Pressing and releasing the push button switch on the sensor momentarily shorts zone temperature sensor ZNT1, resetting and starting the override timer. The unit then starts up and runs until the override timer times out.

Note – Hold the button in for at least 1 second but not more than 30 seconds.

For detailed information on setting the override timer, refer to the “Auto/Manual Operation” section of the applicable operation manual (see Table 1 on page 1).

Note – If this tenant override feature is used on a VAV unit, it may be necessary to signal the VAV boxes that the unit is operating. Use the VAV Box Output for this purpose.

Do not install this cable in the same conduit as power wiring. Such installation can cause unit malfunction.

Daikin IM 696-4 15

Field Wiring

External Discharge Air Reset SignalThe discharge air temperature set point on DAC units can be reset by an external voltage or current signal applied to analog input MCB-AI2. The external reset method can be selected at the controller keypad. External reset requires a field supplied reset signal in the range of 0–10 VDC or 0–20 mA wired to terminals 132 and 133 on the field terminal block (TB2). Refer to the unit wiring diagrams or Figure 16 on page 38 for wiring termination details.

CAUTION

If the external reset option is selected, the controller linearly resets the cooling and heating discharge air temperature set points between user-programmed minimum and maximum values as the field supplied reset signal varies from a minimum to maximum (or maximum to minimum) value.

Field wire the external reset signal to the unit using a twisted pair, shielded cable (Belden 8761 or equivalent). Cable with 22 AWG conductors is sufficient.

CAUTION

Note – If the field signal is in the 0–10 VDC range, configure the analog input jumper associated with analog input MCB-AI2 in the no-jumper (NJ-VDC) position. The analog input DIP switch for this input then must be in the ON (V) position. If the field signal is in the 0–20 mA range, configure the jumper in the current (2-MA) position. The analog input DIP switch for this input then must be in the OFF (T) position.

Detailed information regarding discharge air temperature reset is located in the “Discharge Set Point Reset” section of the applicable operation manual (see Table 1 on page 1).

External Outdoor Air Damper Reset Signal

CAUTION

On units equipped with a 0–100% modulating economizer but not equipped with the optional Design Flow outdoor air measuring option, the minimum outside air damper position set point can be reset by an external voltage or current signal applied to analog input MCB-AI7. The external reset method can be selected at the controller keypad. External reset requires a field supplied reset signal in the range of 0–10 VDC or 0–20 mA wired to terminals 124 and 125 on the field terminal block (TB2). Refer to the unit wiring diagrams or Figure 18 on page 42 (SCC units) for wiring termination details.

If the external reset option is selected, the controller linearly resets the outside air damper position set point between user-programmed minimum and maximum values as the field supplied reset signal varies between a minimum and maximum (or maximum to minimum) value.

The external reset signal must be field-wired to the unit using a twisted pair, shielded cable (Belden 8761 or equivalent). Cable with 22 AWG conductors is sufficient.

CAUTION

Note – If the field signal is in the 0–10 VDC range, configure the analog input jumper associated with analog input MCB-AI7 in the no-jumper (NJ-VDC) position. The analog input dip-switch for this input then must be in the ON (V) position. If the field signal is in the 0–20 mA range, configure the jumper in the current (2-MA) position. The analog input dip-switch for this input then must be in the OFF (T) position.

Detailed information regarding outside air damper position reset can be found in the “Economizer” section of the applicable operation manual (see Table 1 on page 1).

Ground loop current hazard. Can cause equipment damage.Isolate the external reset signal from any ground other than MicroTech II controller chassis ground. If not isolated, ground loop currents can occur, causing damage or erratic unit operation. The device or system providing external reset signal must be connected to the MicroTech II controller chassis, or it must be providing an isolated output. If not, condition the signal with a signal isolator.


Ground loop current hazard. Can cause equipment damage.Isolate the external reset signal from any ground other than MicroTech II controller chassis ground. If not isolated, ground loop currents can occur, causing damage or erratic unit operation. The device or system providing external reset signal must be connected to the MicroTech II controller chassis, or it must be providing an isolated output. If not, condition the signal with a signal isolator.


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Field Wiring

Field Valve Actuator FeedbackWhen the MicroTech II controller is interfaced with a field supplied hot water, steam, or chilled water valve actuator, a position feedback signal can be field-wired from the actuator and input to the MCB. This signal is not required for control purposes but is required for 0–100% capacity indication on the keypad or via a network interface. If the signal is not supplied, the valve is controlled properly, but associated capacity parameter will always indicate 0%.

Field wire the external feedback signal to the unit using a twisted pair, shielded cable (Belden 8761 or equivalent). Cable with 22 AWG conductors is sufficient.

CAUTION

Field Hot Water or Steam Valve Actuator. When interfaced with a field-supplied hot water or steam valve actuator, a valve feedback signal in the form of a resistance that varies from 0 to 500 ohms or 0–5 VDC as the actuator strokes from 0 to 100% open can be wired to terminals 91 and 92 on the field terminal block (TB2). These terminals are factory-wired to analog input MCB-AI10. Refer to the unit wiring diagrams or Figure 16 on page 38 (DAC units) or Figure 18 on page 42 (SCC units) for wiring termination details.

If the field-supplied feedback signal is 0–500 ohms, the following procedures are required:1 Set the analog input jumper associated with MCB-AI10 to

the resistance (1-RTD) position.2 Set the analog input DIP switch associated with MCB-AI10

to the OFF (or T) position.3 Set the Feedback= parameter in the Heating Setup menu on

the unit keypad/display to “2 Wire.”4 After the three items above are set, run the unit through the

Calibrate Mode.

If the field supplied feedback signal is 0–5 VDC, the following procedures are required:1 Set the analog input jumper associated with MCB-AI10 to

the no jumper (NJ-VDC) position.2 Set the analog input DIP switch associated with MCB-AI10

to the ON (or V) position.3 Set the Feedback= parameter in the Heating Setup menu on

the unit keypad/display to “3 Wire.”4 After the three items above are set, run the unit through the

Calibrate Mode.

Field Chilled Water Valve Actuator. When interfaced with a field-supplied chilled water valve actuator, a valve feedback signal in the form of a resistance that varies from 0 to 500 ohms or 0–5 VDC as the actuator strokes from 0 to 100% open can be wired to terminals 8 and 9 on the terminal block (TB5). These terminals are factory-wired to analog input

MCB-AI11. Refer to the unit wiring diagrams for wiring termination details.

If the field-supplied feedback signal is 0–500 ohms, the following procedures are required:1 Set the analog input jumper associated with MCB-AI1 to

the resistance (1-RTD) position.2 Set the analog input dip-switch associated with MCB-AI11

to the OFF (or T) position.3 Set the Feedback= parameter in the Chilled Water Setup

menu on the unit keypad/display to “2 Wire.”4 After the three items above are set, run the unit through the

Calibrate Mode.

If the field supplied feedback signal is 0–5 VDC, the following procedures are required:1 Set the analog input jumper associated with MCB-AI11 to

the no jumper (NJ-VDC) position.2 Set the analog input dip-switch associated with MCB-AI11

to the ON (or V) position.3 Set the Feedback= parameter in the Chilled Water Setup

menu on the unit keypad/display to “3 Wire.”4 After the three items above are set, run the unit through the

Calibrate Mode.


Daikin IM 696-4 17

Field Wiring

Humidity SensorsWhen the MicroTech II controller is configured for constant volume zone temperature control (SCC), a dehumidification sequence is available and can be activated through the keypad. In order to use this function, an optional factory-supplied, field-mounted humidity sensor is required.

Either a wall mount or duct mount sensor is available. The sensor must be wired to terminals 126, 127 and 131 on the unit field terminal block (TB2). Terminal 126 is wired to OUT (0–5 VDC), terminal 127 to GND and terminal 131 to PWR on the humidity sensor. These terminals are factory wired to the MCB analog input MCB-AI12. The input must be 0–5 VDC as the relative humidity varies from 0–100%. Refer to the unit wiring diagrams or Figure 18 on page 42 for wiring termination details.

Note – The output select jumper (J1) on the sensor must be in the 0–5 VDC position. The TEMP terminals on the sensor are not used (see Figure 10 or Figure 11 on page 18).

Field wire the humidity sensor wiring to terminals 126 and 127 to the unit using a twisted pair, shielded cable (Belden 8761 or equivalent). Cable with 22 AWG conductors is sufficient.

CAUTION

Note – Set the analog input jumper associated with MCB-AI12 to the no jumper (NJ-VDC) position. Set the analog input dip switch associated with this input to the ON (V) position.

Figure 10: Humidity sensors (wall mount)

Output adjustmentjumper

0 to 5V0 to 10V

Terminal block TB1

Output adjustmentpotentiometer

Output Adjust

Up

Terminal blo

Wiring open

Mountingdirectionarrows

Figure 11: Humidity sensor (duct mounted)

0–5 V Output jumper Wiring block

(screw terminals are accessed through the cutoutin the housing.)

Of fset adjustment potentiometer

Screw hole

Screw hole Probe

0–10 V Output jumper (factory set)

OUTPUT SELECTION

INPUT18-30V AC,12-30VDC OUTPUT0-10,OR0-5VDC

TERMINAL DESIGNA TION

OFFSET ADJUST

DA TE

0-5V

0-10

V

PWR

OU

T TE

MP

TEM

P

CO

M


18 Daikin IM 696-4

Field Wiring

Humidity Sensor—Discharge Air Control (DAC) Unit

A humidity sensor can be wired to terminals 126, 127 and 131 on TB2 on a discharge air control (DAC) unit as shown on the unit wiring diagram or Figure 16 on page 39. However, this input is not used for control purposes and the current relative humidity value from the sensor cannot be read via the keypad/display. The current value from the sensor can be read via a network interface only.

Field Binary Input SignalsThe following sections describe options that, if used, require field wiring to binary input terminals. Twisted pair, shielded cable is not required for binary input wiring.

Manual Cooling and Heating EnableCooling Enable

24 VAC must be applied to binary input MCB-BI3 to enable cooling operation. If not, the unit Clg Status= parameter in the System menu of the keypad/display indicates “Off Sw” and cooling operation is unavailable. 24 VAC is applied to MCB-BI3 when terminals 101 and 105 on the unit field terminal block (TB2) are made; either with a factory installed jumper wire or a field supplied switch. Refer to the unit wiring diagrams or Figure 16 on page 39 (DAC units) or Figure 17 on page 40 (SCC units) for wiring termination details.

Heating Enable

24 VAC must be applied to binary input MCB-BI4 to enable heating operation. If not, the Htg Status= parameter in the System menu of the keypad/display indicates “Off Sw” and heating operation is unavailable. 24 VAC is applied to MCB-BI4 when terminals 101 and 106 on the field terminal block (TB2) are made; either with a factory installed jumper wire or field supplied switch. Refer to the unit wiring diagrams or Figure 16 on page 38 (DAC units) or Figure 17 on page 41 (SCC units) for wiring termination details.

Manual Unit EnableUnit operation is manually disabled when 24 VAC is applied to binary input MCB-BI2. The UnitStatus= parameter in the System menu of the keypad/display indicates “Off Sw” and the unit will not operate. This occurs when a field supplied and installed switch across terminals 101 and 104 on the field terminal block (TB2) is in the on or closed position. Refer to the unit wiring diagrams or Figure 16 on page 39 (DAC units) or Figure 17 on page 40 (SCC units) for wiring termination details.

If not disabled by this method, the unit is enabled to run when placed in the occupied mode. For details regarding occupied/unoccupied operation refer to the “Auto/Manual Operation” section of the appropriate program-specific operation manual (refer to Table 1 on page 1).

External Time Clock or Tenant OverrideThere are several methods of switching the rooftop unit between occupied and unoccupied operation. It can be done by the controller internal schedule, a network schedule, an external time clock, or a tenant override switch.

If the internal schedule or a network schedule is used, field wiring is not required.

An external time clock or a tenant override switch can be used by installing a set of dry contacts across terminals 101 and 102 on the field terminal block (TB2). When these contacts close, 24 VAC is applied to binary input MCB-BI1, overriding any internal or network schedule and placing the unit into occupied operation (provided the unit is not manually disabled). When the contacts open (24 VAC is removed from MCB-BI1) the unit acts according to the controller internal time schedule or a network schedule. Refer to the unit wiring diagrams or Figure 16 on page 39 (DAC units) or Figure 17 on page 40 (SCC units) for wiring termination details.

For information on setting internal and network controller schedules, refer to the “Scheduling” section in the applicable operation manual (refer to Table 1 on page 1).

Daikin IM 696-4 19

Field Wiring

Miscellaneous Output SignalsThe five optional output signals listed below can be provided by installing field supplied 24 VAC relays wired between terminal 107 on the field terminal block (TB2) and the terminals listed in Table 6. Refer to the unit wiring diagrams or Figure 16 on page 39 (DAC units) or Figure 17 on page 40 (SCC units) for wiring termination details.

CAUTION

• Airflow status• Dirty filter (including optional final filter)• Gas furnace fail alarm (Heat Fail)• Freeze alarm (steam or water coils, optional)• Smoke alarm (optional)

Terminal block TB2 Description Energized field

relay indication

External Exhaust Fan StatusWhen a large exhaust fan or group of exhaust fans is started or stopped during normal rooftop unit operation, the building static pressure may become too positive or negative. If a field binary input signal is delivered to the unit when an external exhaust fan is started, a VAV unit controller that uses “fan tracking” control can modify its return fan control algorithm to compensate for the change in exhaust fan airflow. The fan tracking control feature can reduce or eliminate objectionable building pressure fluctuations that might otherwise occur.

To take advantage of this exhaust fan airflow compensation feature, field wire a set of dry contacts across terminals 101 and 103 on the field terminal block (TB2). When these contacts close, 24 VAC is applied to binary input MCB-BI13, indicating that the external exhaust fan is on. When the contacts open, 24 VAC is removed from MCB-BI13, indicating that the exhaust fan is off. Refer to the unit wiring diagrams or Figure 16 on page 39 for wiring termination details.

For detailed information on the fan tracking feature, refer to the “Return Fan Capacity Control” section of the DAC operation manual (refer to Table 1 on page 1).

The total VA of all field-mounted relays cannot exceed 15 VA and they must have a 24 VAC Class 2 coil. Other power can cause unit malfunction.

Table 6: Miscellaneous field signal termination points

107 Ground NA

108 Fan operation (airflow indication) Airflow present

109 Dirty filter indication Filters dirty

111 Heat alarm detected (gas heat flame failure)

Alarm

112 Freezestat (freeze condition detected)

Normal

113 Smoke (smoke detected) Normal

20 Daikin IM 696-4

Service Information

Service Information

Controller Inputs

Analog Inputs-Main Control Board (MCB)The 16 analog inputs to the MCB are configurable for four different input types by positioning a jumper associated with each input position (refer to Figure 12). The four jumper positions are 1-RTD (temperature sensor or potentiometer), 2-MA (current), 3-NTC (10K ohms thermistor) or no jumperNJ-VDC (voltage).

Figure 12. Analog input jumpers (MCB)

1-RTD 2-MA 3-NTC NJ-VDC

Topof

MCB

The 1-RTD jumper position is used for all the temperature sensor inputs and 0-500 ohm actuator potentiometer position feedback inputs. The NJ-VDC (no jumper) position is used for 0–5 VDC actuator position feedback inputs and the remainder of the standard input devices which are configured for either 0–5 VDC or 0–10 VDC. The 2-MA and the 3-NTC (10K ohm thermistor) jumper positions are not used in this product application for any of the standard input devices. Refer to Table 7 on page 22 (DAC units) and Table 8 on page 22 (SCC units) for a description of all the analog inputs including the correct jumper positions.

In addition to the analog input jumpers, there are two sets of dip switches (SW1 and SW4) associated with the MCB analog inputs. Each set contains eight switches numbered 1 through 8. Refer to Figure 13. The switches on SW1 correspond to inputs MCB-AI1 through MCB-AI8 and the switches on SW4 correspond to inputs MCB-AI9 through MCB-AI16. One switch corresponds to each analog input. If the input is a temperature sensor or potentiometer input (input jumper in the 1-RTD position) then the corresponding switch must be in theT (OFF) position. If the input is a voltage input (no inputjumper NJ-VDC position) then the corresponding switch mustbe in the V (ON) position. Table 7 on page 22 (DAC units) andTable 8 on page 22 (SCC units) include the correct switchsettings for all the analog inputs.

Note – If a special application requires a current input with the input jumper set to the 2-MA position, then the corresponding input switch must be set to the T (OFF) position.

Figure 13. Analog input switches (MCB)

Daikin IM 696-4 21

Service Information

.

Analog input Input description Input jumper Input switch

Analog input Input Description AI jumper AI switch

Table 7: Analog inputs for main control board (MCB)—discharge air controller (DAC)

MCB-AI1 Zone (space) air temperature (optional) 1-RTD T (OFF)MCB-AI2 External discharge air temperature reset NJ-VDC (no jumper) V (ON)MCB-AI3 Discharge air temperature 1-RTD T (OFF)MCB-AI4 Return air temperature 1-RTD T (OFF)MCB-AI5 Outdoor air temperature 1-RTD T (OFF)MCB-AI6 Entering fan air temperaturea 1-RTD T (OFF)MCB-AI7 External OA damper reset NJ-VDC (no jumper) V (ON)

DesignFlow OA airflow #1 (right-hand station)b NJ-VDC (no jumper) V (ON)MCB-AI8 DesignFlow OA airflow #2 (left-hand station)c NJ-VDC (no jumper) V (ON)MCB-AI9 Outdoor air damper positionh NJ-VDC (no jumper) V (ON)MCB-AI10 Heating valve positionh NJ-VDC (no jumper) V (ON)MCB-AI11 Cooling valve positionh NJ-VDC (no jumper) V (ON)

Evaporative Condenser Sump Temperature 1-RTD T (OFF)MCB-AI12 Relative humidityd NJ-VDC (no jumper) V (ON)MCB-AI13 Duct static pressure #1e NJ-VDC (no jumper) V (ON)MCB-AI14 Duct static pressure #2/building static pressure (optional)f NJ-VDC (no jumper) V (ON)MCB-AI15e Discharge fan VFD speed /inlet vane position NJ-VDC (no jumper) V (ON)MCB-AI16g Return fan VFD speed NJ-VDC (No Jumper) V (ON)

a. EFT sensor supplied only on units equipped with gas or electric heat.b. If unit equipped with DesignFlow OA airflow measuring stations, input is an airflow signal from the right-hand DesignFlow station. Otherwise, is an optional

external OA damper position reset signal supplied by field.c. If unit equipped with DesignFlow OA airflow measuring stations, input is an airflow signal from the left-hand DesignFlow station. Otherwise it is a spare input.d. A humidity sensor can be wired to this input to provide a space humidity reading via a BACnet network interface to the unit.e. This input applicable to VAV units only (discharge fan VFD or inlet vanes).f. This input defined as a second duct static pressure input on VAV units if the unit is configured for “fan tracking” return fan control. It is defined as a building

static pressure input if unit is configured for “direct building pressure” return fan control.g. This input applicable on units equipped with a return VFD or inlet vanes.h. Some older units are equipped with a 0–500Ω (2-wire) resistance feedback signal. In this case, the analog input jumper must be in the 1-RTD position, the

corresponding input switch must be in the T (OFF) position and the Feedback= parameter in the Economizer Setup, Heating Setup or Chilled Water Setupmenu (as applicable) must be set to “2 Wire.”

Table 8: Analog inputs for main control board (MCB)—CAV-ZTC (SCC)

MCB-AI1 Zone (space) air temperaturea 1-RTD T (OFF)MCB-AI2 Remote space temperature set point (optional) 1-RTD T (OFF)MCB-AI3 Discharge air temperature 1-RTD T (OFF)MCB-AI4 Return air temperature 1-RTD T (OFF)MCB-AI5 Outdoor air temperature 1-RTD T (OFF)MCB-AI6 Entering fan air temperatureb 1-RTD T (OFF)MCB-AI7 External OA damper reset NJ-VDC (no jumper) V (ON)

Designflow OA airflow #1 (right-hand station)c NJ-VDC (no jumper) V (ON)MCB-AI8 designflow OA airflow #2 (left-hand station)d NJ-VDC (no jumper) V (ON)MCB-AI9 Outdoor air damper positionf NJ-VDC (no jumper) V (ON)

MCB-AI10 Heating valve positionf NJ-VDC (no jumper) V (ON)MCB-AI11 Cooling valve positionf NJ-VDC (no jumper) V (ON)

Evaporative condenser sump temperature 1-RTD T (OFF)MCB-AI12 Relative humidity NJ-VDC (no jumper) V (ON)MCB-AI13 Not used NA NAMCB-AI14 Building static pressure (optional) NJ-VDC (no jumper) V (ON)MCB-AI15 Not used NA NAMCB-AI16e Return fan VFD speed NJ-VDC (no jumper) V (ON)

a. Sensor required if unit is 100% OA. Otherwise, it is optional.b. Sensor supplied only on units equipped with gas or electric heat.c. If unit equipped with DesignFlow OA airflow measuring stations, this input is an airflow signal from the right-hand DesignFlow station. Otherwise, it is an

external OA damper position reset signal supplied by the field.d. If unit equipped with DesignFlow OA airflow measuring stations, this input is an airflow signal from the left-hand DesignFlow station. Otherwise, it is a spare

input.e. This input applicable on units equipped with a return VFD or inlet vanes.f. Some older units are equipped with a 0-500W (2-wire) resistance feedback signal. In this case the analog input jumper must be in the 1-RTD position, the

corresponding input switch must be in the T (OFF) position and the Feedback= parameter in the Economizer Setup, Heating Setup or Chilled Water Setupmenu (as applicable) must be set to “2 Wire.”

22 Daikin IM 696-4

Service Information

Analog Inputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)The optional auxiliary control boards (CCB1, CCB2, GCB1, EHB1 and ERB1) have up to six analog inputs available. However, in this product application, these are used only on the ERB1. Analog inputs ERB1-A1 and ERB1-A2 are configured for temperature sensor inputs. The remainder are spare inputs.

Refer to Table 9 for a description of each analog input on the ERB1 board.

Analog input Input description

ERB1-AI5 Not usedERB1-AI6 Not used

Binary Inputs—Main Control Board (MCB)The 16 binary inputs to the MCB are in the form of 0 VAC (off) or 24 VAC (on) applied to the binary input terminals. Transformer T2 is the source of this the 24 VAC for these inputs.

Each binary input has an LED associated with it that lights when 24 VAC is present at the corresponding input terminal. These binary input LEDs are grouped together and are located in the upper left had corner of the board. Table 10 summarizes the binary input functions and LED indications for the binary inputs to the MCB.

Binary Inputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)The optional auxiliary control boards include 12 binary inputs. Inputs BI1 through BI6 are designed for a set of dry contacts between the COM terminal and the individual binary input terminals on J9. BI7 through BI12 are designed for 24 VAC inputs (input is ON when 24 VAC is present at the corresponding input terminal on J10 and OFF when 0 VAC is not present). The following sections described how these inputs are defined for each of the auxiliary control boards.

Note – The set of two jumpers in the upper right corner of the board (below the RS-485 Communications module) must both be placed on the right most pins. Placing the jumper on the left most pins interlocks binary inputs BO1 with BI1 and BO2 with BI2 respectively. This interlock is not used on this product application

CCB1 & CCB2 (7RPS, RFS/RCS, RDT, RPR & RFR)

When a unit is equipped with a factory condensing unit, each of the two cooling circuits is controlled with an auxiliary control board. Circuit #1 is controlled by the CCB1 and circuit #2 is controlled by the CCB2. Table 10 and Table 11 on page 24 summarize the binary inputs for the CCB1 and CCB2 respectively.

GCB1 (RDS & RAH)

When a rooftop air handling unit is interfaced with a field supplied condensing unit, the cooling stages in the condensing unit are controlled by a generic condenser auxiliary control board. This board is designated GCB1. In this case only GCB1-BI12 is defined in the GCB1 control software. It is a “cool enable” input. Cooling is enabled when 24 VAC is present and disabled when 24 VAC is not present at this input. This input is supplied to the GCB1 through a “cooling enable” output from the MCB.

EHB1

When a unit is equipped with multistage electric heat, the heating stages are controlled by an electric heat auxiliary control board. This board is designated EHB1. In this case only EHB1-BI12 is defined for the EHB1. It is a “heat enable” input. Heating is enabled when 24 VAC is present and disabled when 24 VAC is not present at this input. This input is supplied to the EHB1 through a “heating enable” output from the MCB.

ERB1

When a unit is equipped with an optional energy recovery wheel system, the system is controlled by an energy recovery auxiliary control board. This board is designated ERB1. None of the binary inputs are used on the ERB1.

Table 9: Analog inputs for energy recovery wheel control board (ERB1)

ERB1-AI1 Leaving energy recovery wheel temperature (exhaust), optional

ERB1-AI2 Leaving energy recovery wheel temperature (discharge)ERB1-AI3 Not usedERB1-AI4 Not used

Table 10: Binary inputs for main control board (MCB) Binary input Input description Lit LED

indicationMCB-BI1 External Time clock or tenant override OccupiedMCB-BI2 Manual system disable DisabledMCB-BI3 Remote cool enable EnabledMCB-BI4 Remote heat enable EnabledMCB-BI5 Gas furnace flame failure alarm AlarmMCB-BI6 Airflow status Airflow detectedMCB-BI7 Freeze alarm for steam or hot water coils NormalMCB-BI8 Smoke alarm: supply air, return air or both NormalMCB-BI9 First filter switch NormalMCB-BI10 Final filter switch (optional) NormalMCB-BI11 Outdoor enthalpy statusa

a. Not used on 100% outdoor air units.

Low OA enthalpyMCB-BI12 Not used —MCB-BI13 External exhaust fan status (optional)b

b. Applicable only on VAV units configured for “fan tracking” return fancontrol.

OnMCB-BI14 Duct hi limitc

c. Applicable on VAV units only.

NormalMCB-BI15 Not used —MCB-BI16 Not used —

Daikin IM 696-4 23

Service Information

Binary Input Input Description 24 VAC Present Indication

CCB1-BI1 Compressor #5 Contactor Auxiliary Switch Status M5 Contactor EnergizedCCB1BI2 Not Used -CCB1-BI3 Not Used -CCB1-BI4 Not Used -CCB1-BI5 Not Used -CCB1-BI6 Circuit #1 Low Pressure Switch Status (LP1) Switch ClosedCCB1-BI7 Circuit #1 High Pressure Switch Status (HP1 or HP3) NormalCCB1-BI8 Circuit #1 Frost Protection Switch Status (FP1) NormalCCB1-BI9 Compressor #1 Contactor Auxiliary Switch Status M1 Contactor Energized

CCB1-BI10 Compressor #3 Contactor Auxiliary Switch Status M3 Contactor EnergizedCCB1-BI11 Circuit #1 Pumpdown Switch Status Switch ClosedCCB1-BI12 Circuit #1 Cool Enable Input Enabled

Binary Input Input Description 24 VAC Present Indication

CCB2-BI1 Compressor #6 Contactor Auxiliary Switch Status M6 Contactor EnergizedCCB2-BI2 Not Used -CCB2-BI3 Not Used -CCB2-BI4 Not Used -CCB2-BI5 Not Used -CCB2-BI6 Circuit #2 Low Pressure Switch Status (LP2) Switch ClosedCCB2-BI7 Circuit #2 High Pressure Switch Status (HP2 or HP4) NormalCCB2-BI8 Circuit #2 Frost Protection Switch Status (FP2) NormalCCB2-BI9 Compressor #2 Contactor Auxiliary Switch Status M2 Contactor Energized

CCB2-BI10 Compressor #4 Contactor Auxiliary Switch Status M4 Contactor EnergizedCCB2-BI11 Circuit #2 Pumpdown Switch Status Switch ClosedCCB2-BI12 Circuit #2 Cool Enable Input Enabled

Controller Outputs

Binary Outputs—Main Control Board (MCB)The main control board has 16 binary outputs that provide unit control in response to input conditions. Binary outputs energize on-board electromechanical relays (BO1 through BO4, BO11 and BO12) or triacs (BO5 through BO10 and BO13 through BO16). Unit control devices are wired to the relays and triacs through six output terminal blocks located on the right side of the MCB.

There are three terminals associated with each binary output. The terminals associated with BO1 are labeled NO, 1, and NC, the terminals associated with BO2 are labeled NO, 2, and NC, and so forth. Each binary output has an LED associated with it that lights when the corresponding output relay or the triac is turned on.

Each binary output has an output jumper associated with it. The three jumper positions are: 1-SRC V (jumper on the bottom two pins), 2-BRD24V (jumper on the top two pins) and 3-OFFBRD (no jumper). Refer to Figure 14.

Figure 14. Binary output jumper (MCB)

2 - BRD24V(Not Used)

1 - SRC V. 3-OFFBRDTopof

MCB

When the jumper is in position 1-SRC V, 24 VAC from the SRC 1-8 terminal (BO1 through BO8) or the SRC 9-16 terminal (BO9 through BO16) is applied to the numbered terminal of the associated outputs. In the case of BO1 through BO4, BO11 and BO12, this signal is then delivered to either the NC terminal when the corresponding output is off (output relay de-energized) or the NO terminal when the corresponding output is on (output relay energized). In the case of BO5 through BO10 and BO13 through BO16, this signal is then delivered to the NO terminal when the corresponding output is on (triac energized). Transformer T3 furnishes 24 VAC to the SRC 1-8 terminal and the SRC 9-16 terminal. This jumper configuration is used when a specific binary output is used to energize a 24 VAC pilot relay in the unit. Refer to Table 13 on page 25 for the correct jumper position for all the standard binary outputs.

Table 11: Binary inputs for circuit #1 auxiliary cooling control board (CCB1)

Table 12: Binary inputs for circuit #2 auxiliary cooling control board (CCB2)

24 Daikin IM 696-4

Service Information

When the jumper is in position 3-OFFBRD (no jumper installed) there is no on-board voltage applied to the numbered terminal of the corresponding binary output. In the case of BO1 through BO4, BO11 and BO12, the numbered terminal is simply “made” to the NO terminal when the corresponding output is on (output relay energized) or to the NC terminal when the corresponding output is off (output relay de-energized). In the case of BO5 through BO10 and BO13 through BO16, the numbered terminal is simply “made” to the

NO terminal when the corresponding triac output is on. This jumper configuration is used most often in this product application. Refer to Table 13 on page 25 for the correct jumper position for all the standard binary outputs.

The 2-BRD24V jumper configuration is not used in this product application.

Binary output Output description Lit LED indication Jumper position

BO13

BO14

BO15BO16

Table 13: Binary outputs for main control board (MCB)

BO1 Discharge air fan, On/Off Fan ON 3-OFFBRD (no jumper)BO2 Return air fan, ON/OFF Fan ON 3-OFFBRD (no jumper)BO3 Fan Operation Output Signal Fans ON 1-SRC VBO4 Alarm Output Signal Normal 1-SRC VBO5 Close outdoor air dampers Closing 3-OFFBRD (no jumper)BO6 Open outdoor air dampers Opening 3-OFFBRD (no jumper)BO7a Close chilled water valve Closing 3-OFFBRD (no jumper)

Close chilled water F&BP dampers Closing 3-OFFBRD (no jumper)Cool enable Enabled 3-OFFBRD (no jumper)Evaporative condenser sump pump, ON/OFF Pump ON 3-OFFBRD (no jumper)

BO8b Open chilled water valve Opening 3-OFFBRD (no jumper)Open chilled water F&BP dampers Opening 3-OFFBRD (no jumper)

BO9c Close heating valve Closing 3-OFFBRD (no jumper)Close heating F&BP dampers Opening 3-OFFBRD (no jumper)

BO10d Open heating valve Opening 3-OFFBRD (no jumper)Open heating F&BP dampers Opening 3-OFFBRD (no jumper)

BO11e Gas furnace enable/disable Enabled 1-SRC VSingle stage heat ON/OFF Heat On 1-SRC VF&BP damper/valve changeover Dampers open / valve modulating 1-SRC VHeat enable Enabled 1-SRC V

BO12 VAV box output signal Cooling mode 3-OFFBRD (no jumper)Decrease discharge fan VFD speed Decreasing 1-SRC VDehumidification reheat circuit # 2 Reheat ON 3-OFFBRD (no jumper)Increase discharge fan VFD speed Increasing 1-SRCDehumidification reheat circuit # 1 Reheat ON 3-OFFBRD (no jumper)Decrease return fan VFD speed Decreasing 1-SRC VIncrease return fan VFD speed Increasing 1-SRC V

a. If the unit is equipped with chilled water cooling, output BO7 closes the chilled water valve. If the unit is equipped with chilled water cooling with face andbypass dampers, output BO7 closes the face dampers. If the unit is equipped with DX cooling, BO7 provides a signal to the auxiliary cooling control boards(CCB1 and CCB2) to enable cooling operation. If unit is equipped with an evaporative condenser, BO7 turns the sump pump on.

b. If the unit is equipped with chilled water cooling, output BO8 opens the chilled water valve. If the unit is equipped with chilled water cooling with face andbypass dampers, output BO8 opens the face dampers.

c. If the unit is equipped with modulating heat, output BO9 closes the heating valve. If the unit is equipped with modulating heat with face and bypass dampers,output BO9 closes the face dampers.

d. If the unit is equipped with modulating heat, output BO10 opens the heating valve. If the unit is equipped with modulating heat with face and bypass dampers,output BO10 opens the face dampers.

e. If the unit is equipped with modulating gas heat, output BO11 enables the gas furnace. If the unit is equipped with single stage heat for morning warm uppurposes, BO11 turns on the single stage of heat. If the unit is equipped with modulating heat with face and bypass dampers, BO11 changes the heat controlsuch that BO9 and BO10 either modulate the heating value or the face and bypass dampers. If the unit is equipped with multiple stage electric heat, outputBO11 provides a signal to the auxiliary electric heat control board (EHB1) to enable heating operation.

Daikin IM 696-4 25

Service Information

Binary Outputs—Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 & ERB1)The optional auxiliary control boards include nine binary outputs that control nine on-board electromechanical relays. Unit control devices are wired to these outputs through output terminals on the left side of the board. The functions of these outputs vary for the different auxiliary board applications. The following sections describe the output functions for the auxiliary control board applications.

CCB1 and CCB2 (RPS, RFS/RCS, RDT, RPE, RDE, RCE, RPR, and RFR)

When a unit is equipped with a factory condensing unit, each of the two cooling circuits is controlled with an auxiliary control board. Circuit #1 is controlled by the CCB1 and Circuit #2 is controlled by the CCB2. There are nine binary output relays on each cooling control board. These relays are energized based on commands received from the MCB to provide the appropriate switching actions in the DX cooling control circuits.

The output relays on the CCB1 and CCB2 board control compressor contactors, compressor unloaders, circuit liquid line solenoid valves, or condenser fan outputs. Tables 14 through 21 list the CCB1 and CCB2 output functions for the available unit compressor staging configurations.

The liquid line solenoid valve on each circuit opens (BO4 turned on) before the first compressor in the circuit is turned on. Normally the compressor outputs in the circuit begin turning on according to the controller staging logic as soon as the circuit low pressure switch closes. The exception to this rule is when a unit is equipped and configured for low ambient operation. In this case the first stage compressor in a circuit is turned on at the same time the liquid line solenoid valve is opened.

The condenser fan outputs are turned on and off based on ambient temperature set points adjustable through the unit keypad.

The compressor staging sequences for the available compressor staging configurations are described in the following sections.

2-Compressors/3-Stage. In this configuration there aretwo unequally sized scroll compressors and two coolingcircuits. All cooling outputs are always controlled in the sameway. There is no compressor or circuit lead/lag operation withthis configuration.

The normal staging sequence is as follows:

When a capacity increase is required and the cooling capacity is 0%, the small compressor in Circuit #1 is turned on. When a further capacity increase is required, the large compressor in Circuit #2 is turned on while the small compressor in Circuit #1 is turned off. When a further capacity increase is required, the small compressor in Circuit #1 is turned on while the large

compressor in Circuit #2 remains on. When capacity decrease is required, the compressors stage off in the reverse order.

If the small compressor (Circuit #1) is disabled, the large compressor (Circuit #2) operates when cooling is required and the cooling capacity is set to 66%. If the large compressor is disabled, the small compressor operates when cooling is required and the cooling capacity is set to 33%.

Table 14 summarizes the normal binary output functions and staging sequencing for the CCB1 and CCB2 for the 2-Compressor/3-Stage cooling configuration. The “X”characters in Table 14 indicate that the output is energized fora particular cooling capacity.

Cooling circuit

number

Output number Description

Action with

output on

Cooling capacity (%)

0 33 66 100

Table 14: Binary outputs for cooling control boards (CCB1 and CCB2): 2-compressors/3-stage

1 (CCB1)

BO1 Compressor #1 (small compressor) ON/OFf

ON X X

BO2 Not used -BO3 Not used -BO4 Circuit # 1 liquid line

solenoid valve open/closea

a. Circuit Lead/Lag and Cross Circuit Loading versus Lead Circuit loading donot apply to this staging configuration.

Open X X

BO5 Condenser fan #11 ON/OFF

ON b

b. Condenser fan outputs turn on and off based on ambient or evaporativecondensing sump temperature set points adjustable through the unitkeypad.

c. This output is not used on unit equipped with an evaporative condenserand a VFD controlling the first condenser fan on each circuit (CondenserFan # 11 and # 21). The VFD controlling these fans is started and stoppedand modulated via RS-485 communications with the main control board.

d. This output is used to open a sump dump valve on units equipped with anevaporative condenser. Output is energized to open valve.

b

BO6 Condenser fan #12 ON/OFF

ON b b

BO7 Not used -BO8d Not used -BO9 Not used -

2 (CCB2)

BO1 Compressor #2 ON/OFF (large compressor)

ON X X

BO2 Not used -BO3 Not used -BO4 Circuit #2 liquid line

solenoid valve open/closea

Open X X

BO5 Condenser fan # 11 ON/OFFc

ON b b

BO6 Condenser fan # 12 ON/OFF

ON b b

BO7 Not used -BO8d Not used -BO9 Not used -

26 Daikin IM 696-4

Service Information

4-Compressors/4-Stage or 6-Compressor/6-Stage. In thisconfiguration there are four compressors and two coolingcircuits. The unit cooling capacity is increased and decreasedby turning on and off compressors. One of the circuits isdesignate the “Lead” and the other the “Lag” circuit. Fordetailed information regarding circuit lead/lag operation, referto the “Compressor Staging” section of the applicableoperation manual (refer to Table 1 on page 1). Disabledcompressors are not turned on.

There are two methods for controlling the two circuits when both are enabled. These are referred to as Cross Circuit Loading and Lead Circuit Loading and are described in the following sections. For detailed information regarding selecting Cross Circuit Loading versus Lead Circuit Loading, refer to the “Compressor Staging” section of the applicable operation manual (refer to Table 1 on page 1).

Cross Circuit Loading. With this method, the two circuits are alternately loaded and unloaded as evenly as possible.


When a capacity increase is required and the number of operating compressors in both circuits is the same, the compressor in the “Lead” circuit with the fewest run hours that is not operating is turned on. When a capacity increase is required and the number of compressors in the two circuits is not the same, the compressor in the “Lag” circuit with the fewest run hours that is not operating is turned on.

When a capacity decrease is required and the number of operating compressors in both circuits is the same, the operating compressor in the “Lag” circuit with the most run hours is turned off. When a capacity decrease is required and the number of operating compressors in the two circuits is not the same, the operating compressor in the “Lead” circuit with the most run hours is turned off.

Lead Circuit Loading. With this method, one circuit is loaded completely before the first compressor in the second circuit is turned on, and one circuit is unloaded completely before the other circuit begins to be unloaded.


When a capacity increase is required and the number of operating compressors is 0, the compressor in the “Lead” circuit with the fewest run hours is turned on. When a further capacity increase is required, the second compressor in the “Lead” circuit is turned on, fully loading that circuit. When a further capacity increase is required, the compressor in the “Lag” circuit with the fewest run hours is turned on. When a further capacity increase is required, the remaining compressor on the “Lag” circuit is turned on, fully loading that circuit.

When a capacity decrease is required, the compressor in the “Lag” circuit with the most run hours is turned off. When a further capacity decrease is required, the remaining compressor in the “Lag” circuit is turned off. When a further capacity decrease is required, the compressor in the “Lead” circuit with the most run hours is turned off. When a further capacity decrease is required, the remaining compressor in the “Lead” circuit is turned off.

Table 15 on page 28 summarizes the normal binary output functions and staging sequencing for the CCB1 and CCB2 for the 4-compressor/4-stage cooling configuration. Table on page 28 summarizes the normal binary output functions and staging sequences for the CCB1 and CCB2 for the 6-compressor/ 6-stage cooling configuration. The Xs in thetable indicate that the output is energized for a particularcooling capacity.

With either the Cross Circuit Loading or Lead Circuit Loading methods, a disabled circuit remains at zero capacity. If the other circuit is enabled, it acts as the “Lead” and the circuit capacity is controlled using the Lead Circuit Loading.

Daikin IM 696-4 27

Service Information

Cooling circuit

number

Output number Description

Action with

output on

Cooling capacity (%)Cross circuit loading Lead circuit loading

0 25 50 75 100 0 25 50 75 100

a. If Circuit #2 is the “lead” circuit, interchange the data in the table between CCB1 and CCB2 for the correct output staging data.b. If Compressor #3 has fewer run hours it operates instead of Compressor #1 at this cooling capacity.c. If Compressor #4 has fewer run hours it operates instead of Compressor #2 at this cooling capacity.d. Condenser fan outputs turn on and off based on ambient or evaporative condenser sump temperature set points adjustable through the unit keypad.e. This output is applicable on 060C size units only.f. This output is not used on unit equipped with an evaporative condenser and a VFD controlling the first condenser fan on each circuit (Condenser Fan # 11 and

# 21). The VFD controlling these fans is started and stopped and modulated via RS-485 communications with the main control board.g. This output is used to open a sump dump valve on units equipped with an evaporative condenser. Output is energized to open valve.

a. If Circuit #2 is the “lead” circuit, interchange the data in the table between CCB1 and CCB2 for the correct output staging data.b. If Compressor #5 has fewer run hours it operates instead of Compressor #1 or Compressor # 3 at this cooling capacity.c. If Compressor #6 has fewer run hours it operates instead of Compressor #2 or Compressor #4 at this cooling capacity.d. Condenser fan outputs turn on and off based on ambient or evaporative condenser sump temperature set points adjustable through the unit keypad.e. This output is applicable on 075C size units only, or on units equipped with an evaporative condenser in which case the output is used to open a sump dump

valve when energized.f. This output is not used on unit equipped with an evaporative condenser and a VFD controlling the first condenser fan on each circuit (Condenser Fan # 11 and

# 21). The VFD controlling these fans is started and stopped and modulated via RS-485 communications with the main control board.

Table 15: Binary outputs for cooling control boards (CCB1 and CCB2): 4-compressors/4-stage (circuit #1 lead)a

1 (CCB1) BO1 Compressor #1 ON/OFF ON X X X X X X X XBO2 Compressor #3 ON/OFF ON b b X X b X X XBO3 Not used —BO4 Circuit #1 liquid line solenoid

valve open/closeOpen X X X X X X X X

BO5 Condenser fan #11 ON/OFFf ON d d d d d d d dBO6 Condenser fan #12 ON/OFF ON d d d d d d d dBO7 Condenser fan #13 ON/OFFe ON d d d d d d d dBO8g Not usedg —BO9 Not used —

2 (CCB2) BO1 Compressor #2 ON/OFF ON X X X X XBO2 Compressor #4 ON/OFF ON c c X c XBO3 Not used —BO4 Circuit #1 liquid line solenoid

valve open/closeOpen X X X X X

BO5 Condenser fan #21 ON/OFFf ON d d d d dBO6 Condenser fan #22 ON/OFF ON d d d d dBO7 Condenser fan #23 ON/OFFe ON d d d d dBO8g Not used —BO9 Not used —

Table 16: Binary outputs for cooling control boards (CCB1 and CCB2): 6-compressors/6-stage (circuit #1 lead)a

Cooling circuit # Output # Description

Action with

output ON


0 16 33 50 66 83 100 0 16 33 50 66 83 100

1 (CCB1)

BO1 Compressor #1 ON/OFF ON X X X X X X X X X X X XBO2 Compressor #3 ON/OFF ON b b X X X X b X X X X XBO3 Not used —BO4 Circuit #1 liquid line solenoid valve open/close Open X X X X X X X X X X X XBO5 Condenser fan #11 ON/OFFf ON d d d d d d d d d d d dBO6 Condenser fan #12 ON/OFF ON d d d d d d d d d d d dBO7 Condenser fan #13 ON/OFF ON d d d d d d d d d d d dBO8 Condenser fan # 14 ON/OFFe ON d d d d d d d d d d d dBO9 Compressor #5 ON/OFF ON b b b b X X b b X X X X

2 (CCB2)

BO1 Compressor #2 ON/OFF ON X X X X X X X XBO2 Compressor #4 ON/OFF ON c c X X X c X XBO3 Not used —BO4 Circuit #2 liquid line solenoid valve open/close Open X X X X X X X XBO5 Condenser fan #21 ON/OFFf ON d d d d d d d dBO6 Condenser fan #22 ON/OFFf ON d d d d d d d dBO7 Condenser fan #23 ON/OFF ON d d d d d d d dBO8 Condenser fan #24 ON/OFFe ON d d d d d d d dBO9 Compressor #6 ON/OFF ON c c c c X c c X

28 Daikin IM 696-4

Service Information

4-Compressors/8-Stage. In this configuration there are fourequally sized compressors and two cooling circuits.Compressor #1 and Compressor #3 are in Cooling Circuit #1and Compressor #2 and Compressor #4 are in Cooling Circuit#2. Compressor #1 and Compressor #2 each have oneunloader. Compressor #3 and Compressor #4 have nounloading. Each cooling circuit is controlled in the same way.One circuit is designated the “Lead” and the other the “Lag”circuit. For detailed information regarding circuit lead/lagoperation, refer to the applicable operation manual (refer toTable 1 on page 1).

There are two methods for controlling the two circuits when both are enabled: Cross Circuit Loading and Lead Circuit Loading. For details regarding selecting Cross Circuit Loading versus Lead Circuit Loading, refer to the “Compressor Staging” section of the applicable operation manual (refer to Table 1 on page 1).

Cross Circuit Loading. With this method, the two circuits are alternately loaded and unloaded as evenly as possible.


When a capacity increase is required and both circuits are operating at the same capacity, the “Lead” circuit is staged up if not already at its maximum. When a capacity increase is required and both circuits are not operating at the same capacity, the “Lag” circuit is staged up if not already at its maximum capacity. When a capacity decrease is required and both circuits are operating at the same capacity, the “Lag”

circuit is staged down. When a capacity decrease is required and both circuits are not operating at the same capacity, the “Lead” circuit is staged down.

Lead Circuit Loading. With this method, one circuit is loaded completely before the first compressor in the other circuit is turned on, and one circuit is unloaded completely before the other circuit is unloaded.


When a capacity increase is required and the “Lead” circuit is not at maximum, the “Lead” circuit is staged up. When a capacity increase is required and the “Lead” circuit is already at its maximum stage, the “Lag” circuit is staged up. When a capacity decrease is required and the “Lag” circuit is not at zero capacity, the “Lag” circuit is staged down. When a capacity decrease is required and the “Lag” circuit is at zero capacity, the “Lead” circuit is staged down.

Table 17 on page 29 summarizes the normal binary output functions and staging sequencing for CCB1 and CCB2 for the 4 Compressors/8 Stage Lead Circuit Loading cooling configuration. The Xs in the table indicate that the output is energized for a particular circuit cooling capacity.

With either the Cross Circuit Loading or Lead Circuit Loading methods, a disabled circuit remains at zero capacity. If the other circuit is enabled, it acts as the “Lead” and the circuit capacity is controlled using the Lead Circuit Loading method as shown in Table 17.

Cooling circuit #

Output # Description

Action with

output ON


0 12 25 37 50 62 75 87 100 0 12 25 37 50 62 75 87 100

a. If Circuit #2 is the “lead” circuit, interchange the data in the table between CCB1 and CCB2 for the correct output staging data.b. Condenser fan outputs turn on and off based on ambient or evaporative condenser sump temperature set points adjustable through the unit keypad.c. This output is not used on unit equipped with an evaporative condenser and a VFD controlling the first condenser fan on each circuit (Condenser Fan # 11 and

# 21).The VFD controlling these fans is started and stopped and modulated via RS-485 communications with the main control board.

Table 17: Binary outputs for cooling control boards (CCB1 and CCB2): 4-compressors/8-stage

1 (CCB1) BO1 Compressor #1 ON/OFF ON X X X X X X X X X X X X X X X XBO2 Compressor # 3 ON/OFF ON X X X X X X X X X XBO3 Unloader #1, Compressor #1 Unloaded X X X X X X XBO4 Circuit # 1 liquid line solenoid

valve open/closeOpen X X X X X X X X X X X X X X X X

BO5 Condenser fan #11 ON/OFFc ON b b b b b b b b b b b b b b b bBO6 Condenser fan #12 ON/OFF ON b b b b b b b b b b b b b b b bBO7 Condenser fan #13 ON/OFF ON b b b b b b b b b b b b b b b bBO8 Condenser fan #14 ON/OFF ON b b b b b b b b b b b b b b b bBO9 Not used —

2 (CCB2) BO1 Compressor #2 ON/OFF ON X X X X X X X X X X XBO2 Compressor #4ON/OFF ON X X X X XBO3 Unloader #1, compressor #2 Unloaded X X X X X XBO4 Circuit # 1 liquid line solenoid

valve open/closeOpen X X X X X X X X X X X

BO5 Condenser fan #21 ON/OFFc ON b b b b b b b b b b bBO6 Condenser fan #22 ON/OFF ON b b b b b b b b b b bBO7 Condenser fan #23 ON/OFF ON b b b b b b b b b b bBO8 Condenser fan #24 ON/OFF ON b b b b b b b b b b bBO9 Not used —

Daikin IM 696-4 29

Service Information

3-Compressors/4-Stage. In this configuration there aretwo equally sized small compressors in Cooling Circuit #1 andone large compressor in Cooling Circuit #2. The coolingoutputs are always controlled in the same way. There is nocircuit lead/lag operation with this configuration.

Starting with 0% cooling capacity, when a capacity increase is required, the small compressor on circuit #1 with the fewest run hours is turned on (25%). When a further capacity increase is required, the remaining compressor on circuit #1 is turned on (50%). When a further capacity increase is required, the large compressor on circuit #2 is turned on and the small compressor on circuit #1 with the most run hours is turned off (75%). When a further capacity increase is required, the small compressor on circuit #1 that is not operating is turned on (100%).

Starting with 100% capacity, when a capacity decrease is required, the small compressor on circuit #1 with the most run hours is turned off (75%). When a further capacity decrease is required, the large compressor on circuit #2 is turned off and

the small compressor on circuit #1 that is not operating is turned on (50%). When a further capacity decrease is required, the small compressor on circuit #1 with the most run hours is turned off (25%). When a further capacity decrease is required, the operating small compressor on circuit #1 is turned off (0%)

Note – If one of the small compressors on circuit #1 is disabled, the unit stages between 25% (using the enabled small compressor on circuit #1) and 75% (small compressor on circuit #1 and large compressor on circuit #2) skipping the 50% capacity step. If both of the small compressors on circuit #1 are disabled, the large compressor on circuit #2 (50% capacity) cycles on and off to maintain the load. If the large compressor on circuit #2 is disabled, the two small compressors on circuit #1 cycles on and off (based on run hours) to maintain the load.

Table 20 on page 31 summarizes the normal binary output functions and staging sequencing for CCB1 and CCB2 for the 3 Compressors/4 Stage cooling configuration. The Xs in the table indicate that the output is energized for a particular cooling capacity.

Cooling circuit #output Description Action with output ON

Cooling capacity (%)0 25 50 75 100

1 (CCB1)

BO1 Compressor # 1 ON/OFF (small compressor) On X X X XBO2 Compressor # 3 ON/OFF (small compressor) On b X b XBO3 Not used —BO4 Circuit # 1 liquid line solenoid valve open/close Open X X X XBO5 Condenser fan # 11 ON/OFFd On c c c cBO6 Condenser fan # 12 ON/OFF On c c c cBO7 Condenser fan # 13 ON/OFF On c c c cBO8 Not usede —BO9 Not used —

2 (CCB2)

BO1 Compressor # 2 ON/OFF On X XBO2 Not used OnBO3 Not used —BO4 Circuit # 2 liquid line solenoid valve open/close Open X XBO5 Condenser fan # 21 ON/OFFd On c cBO6 Condenser fan # 22 ON/OFF On c cBO7 Condenser fan # 23 ON/OFF On c cBO8 Not usede —BO9 Not used —

a. Circuit Lead/Lag does not apply to this staging configuration.b. If Compressor #3 has fewer run hours it operates instead of Compressor #1 at this cooling capacity.c. Condenser fan outputs turn on and off based on ambient or evaporative condenser sump temperature set points adjustable through the unit keypad.d. This output is not used on unit equipped with an evaporative condenser and a VFD controlling the first condenser fan on each circuit (Condenser Fan # 11 and

# 21).The VFD controlling these fans is started and stopped and modulated via RS-485 communications with the main control board.

e. This output is used to open a sump dump valve on units equipped with an evaporative condenser. Output is energized to open valve.

Table 18: Binary outputs for cooling control boards (CCB1 & CCB2): 3-compressors/4-stage (circuit #1 lead)a

30 Daikin IM 696-4

Service Information

GCB1 (RDS & RAH)

For RDS and RAH model air handling units interfaced with generic condensing units, the cooling stages are controlled by an auxiliary control board loaded with special generic condensing unit control software. This board is designated GCB1. There are nine binary output relays on the GCB1. These relays are energized based on commands received from the MCB to provide the appropriate switching action in the condensing unit control circuitry. The condensing unit control circuit terminals are wired to these output relays through the binary output terminals on the left side of the board.

These cooling outputs are energized and de-energized sequentially to maintain the cooling load. The outputs are sequentially turned on whenever the cooling capacity is increased. The outputs are sequentially turned off whenever the cooling capacity is decreased.

This sequence of one output per stage is shown in Table 19 on page 31. With this arrangement, protection of the compressors and control of condenser fans are not provided by the

MicroTech II controller but rather by the condensing unit control system.

EHB1

When a unit is equipped with a multiple stage electric heater the heat is controlled by an auxiliary electric heat control board. The board is designated EHB1. There are nine binary output relays on the EHB1 board. These relays are energized based on commands from the MCB to provide the appropriate switching action in the electric heat control circuitry. The electric heat control terminals are wired to these output relays through the binary output terminals on the left side of the board.

These heating outputs are energized and de-energized sequentially to maintain the heating load. These outputs are sequentially turned on whenever the heating capacity is increased. These outputs are sequentially turned off whenever the heating capacity is decreased. The sequence of one output per stage is shown in Table 20.

Output # Output description Action with output ON

Cooling stage

0 1 2 3 4 5 6 7 8

GCB1-BO1 Cooling stage #1 ON/OFF On X X X X X X X XGCB1-BO2 Cooling stage #2 ON/OFF On X X X X X X XGCB1-BO3 Cooling stage #3 ON/OFF On X X X X X XGCB1-BO4 Cooling stage #4 ON/OFF On X X X X XGCB1-BO5 Cooling stage #5 ON/OFF On X X X XGCB1-BO6 Cooling stage #6 ON/OFF On X X XGCB1-BO7 Cooling stage #7 ON/OFF On X XGCB1-BO8 Cooling stage #8 ON/OFF On XGCB1-BO9 Not used —

Output # Output description Action with output on

Heating stage

0 1 2 3 4 5 6 7 8

EHB1-BO1 Heating stage #1 ON/OFF ON X X X X X X X XEHB1-BO2 Heating stage #2 ON/OFF ON X X X X X X XEHB1-BO3 Heating stage #3 ON/OFF ON X X X X X XEHB1-BO4 Heating stage #4 ON/OFF ON X X X X XEHB1-BO5 Heating stage #5 ON/OFF ON X X X XEHB1-BO6 Heating stage #6 ON/OFF ON X X XEHB1-BO7 Heating stage #7 ON/OFF ON X XEHB1-BO8 Heating stage #8 ON/OFF ON XEHB1-BO9 Not used —

Table 19: Binary outputs for cooling control board (CCB21): RDS or RAH with up to 8 DX cooling stages

Table 20: Binary outputs for electric heat control board (EHB1): up to 8 heat stages

Daikin IM 696-4 31

Service Information

EERB1

When a unit is equipped with an optional energy recovery wheel, the system is controlled by an auxiliary energy recovery control board. The board is designated ERB1. There are nine binary output relays on the ERB1. These relays are energized based on commands from the MCB to provide the appropriate switching action in the energy recovery wheel control circuitry. The energy recovery wheel control terminals are wired to these output relays through the binary output terminals on the left side of the board. Table 21 summarizes the binary output connections for the ERB1 board.

Binary output Output description Action with

output ON

ERB1-BO1 Enthalpy wheel ON/OFF OnERB1-BO2 Not used —ERB1-BO3 Not used —ERB1-BO4 Close enthalpy wheel bypass dampers ClosingERB1-BO5 Open enthalpy wheel bypass dampers OpeningERB1-BO6 Not used —ERB1-BO7 Decrease enthalpy wheel speed DecreasingERB1-BO8 Increase enthalpy wheel speed IncreasingERB1-BO9 Not used —

Software Identification and ConfigurationThe MicroTech II control system code is made up of up to four different software components. All unit applications include a main control board application code component that resides in the main control board (MCB). Then, depending on the unit configuration, there may be one or two cooling auxiliary control boards, an electric heat auxiliary control board, or an energy recovery auxiliary control board each loaded with an application code component.

The application code in the main control board and any auxiliary control boards are each assigned a ten-digit software identification number. This includes a seven-digit base number followed by a three-digit version number.

The software identification numbers the unit was loaded with at the factory appears on the software identification label located near the keypad/display. Figure 16 shows a typical label. The box labeled “UNIT SOFTWARE NUMBER” contains the software identification number for the code in the main controller (MCB). The box labeled “COMPRESSOR SOFTWARE” contains the software identification number for the code in the auxiliary cooling control board(s) (CCB1, CCB2 and GCB1) when applicable. The box labeled “STAGE ELEC HEAT SOFTWARE” contains the software identification number for the code in the auxiliary electric heat control board (EHB1), when applicable. The box labeled “ENERGY RECOVERY SOFTWARE” contains the software identification number for the code in the auxiliary energy recovery control board (ERB1), when applicable.

Note – The “UNIT SOFTWARE NUMBER” loaded into the main controller (MCB) also appears in the AHUID= parameter in the Unit Configuration menu on the unit keypad/display.

Figure 15.

UNIT SOFTWARE NUMBER

SOFTWARE CONFIGURTION CODE

COMPRESSOR SOFTWARE

STAGE ELEC HEAT SOFTWARE

ENERGY RECOVERY SOFTWARE

UNIT G.O.-SEQ NUMBER

2506010146

11780830411002210100211YYY

2506011310

2506012210

2506013210

728121-050

Software identification label

Main Control Board (MCB) ConfigurationAfter the main control board software component is loaded into the MCB, it must be “configured” for the specific control application. This consists of setting the value of 20 configuration variables within the MCB. These variables define things such as the type of cooling, number of compressors and cooling stages and the type of heat. If all of these items are not set appropriately for the specific unit, the unit will not function properly. The correct settings for these parameters are defined for a given unit by the unit Software Configuration Code. The Software Configuration Code consists of a 26-character string of numbers and letters. The code id located on the unit Software Identification Label on the back of the door where the unit keypad is mounted. See also Figure 22 on page 33.

Only the first 22 characters of this code are used for software configuration purposes. The first 22 characters of the Software Configuration Code currently loaded into a unit controller can be determined via the unit keypad/display by viewing the six menu items under the Configuration Code menu. The six menu items are Pos #1–4=, Pos #5–8=, Pos #9–12=, Pos #13–16=, Pos #17–20= and Pos #21–22=. The Software Configuration Code in the unit is determined by combining the values of these six parameters.

For example, if the six parameters read as Pos #1–4=1.178, Pos #5–8=0.830, Pos #9 12=4.104, Pos #13–16=0.221, Pos #17–20=0.100 and Pos #21–22=2.0, then the Software Configuration Code in the unit is 1178083041040221010020. Note that the decimal points in the values are ignored when constructing the code. Table 22 on page 33 lists the configuration code variables including the position within the code, a description of the parameter, the variable object and

Table 21: Binary outputs for energy recovery wheel control board (ERB1)

32 Daikin IM 696-4

Service Information

attribute name and the applicable settings for each. The factory default values are shown in bold font.

Configuration string position Description Values (default in bold)

Main Control Board (MCB) Data ArchivingAll MCB control parameters and the real time clock settings are backed up by the MCB battery when power is removed from the MCB. In the event of a battery failure, the MCB includes a data archiving function. Once a day, just after midnight, all the MCB control parameter settings are archived to a file stored in the MCB FLASH memory. If the MCB is powered up with a low or defective battery (or with the battery removed), the most recently archived data is restored to the controller.

Note – When this archived data restoration process occurs, it increases the controller start up and initialization time period by approximately 75 seconds.

Table 22: Software configuration string

1 Unit Type0 RA zone control1 RA DAT control2 100 OA zone control3 100 OA DAT control

2 Cooling Type0 None1 Compressorized clg2 Chilled water (2-wire FB)A Chilled water (3-wire FB)

3Compressoriz

ed cooling configuration

0 2 comp/2 stage1 2 comp/3 stage2 2 comp/4 stage3 2 comp/6 stage4 3 comp/4 stage5 4 comp/4 stage6 6 comp/6 stage7 4 comp/8 stage8 Generic condenser

4Generic

condenser stages

1 – 8 Stages (Default = 8)

5 Low ambient 0 No1 Yes

6* Condenser fan type

0 No evap cond control1 2 cond fans/cir– ABB VFD2 2 cond fans/cir– Graham VFD 3 2 cond fans/cir– Reliance VFD4 2 cond fans/cir– no VFD5 3 cond fans/cir– ABB VFD6 3 cond fans/cir– Graham VFD7 3 cond fans/cir– Reliance VFD8 3 cond fans/cir– no VFD

7 Damper type

0 None1 Single position 30% (2-wire FB)2 Single position 100% (2-wire FB)3 Economizer (2-wire FB)A Single position 30% (3-wire FB)B Single position 100% (3-wire FB)C Economizer (3-wire FB)

8 DesignFlo

0 No DesignFlo1 018–030 (800) (non-precision PS)2 036–040 (802) (non-precision PS)3 045–075 (047) (non-precision PS)4 080–135 (077) (non-precision PS)A 018–030 (800) (precision PS)B 036–040 (802) (precision PS)C 045–075 (047) (precision PS)D 080–135 (077) (precision PS)

9 Heating type 0None1F BP ctrl2Multi staged3Modulated gas, 3–1 (2-wire FB)4Modulated gas, 20–1 (2-wire FB)5Steam or hot water (2-wire FB)6Single stage gas7Single stage electricAModulated gas, 3–1 (3-wire FB)BModulated gas, 20–1 (3-wire FB)CSteam or hot water (3-wire FB)

10 Max heating stages

1 – 8 stages (default = 1)

11,12, and 13 Max heat rise Three digits (default = 100)

14 Discharge fan type

0 Constant volume1 Variable inlet vanes2 Variable freq drive

15 Return fan type

0 Constant volume1 Variable inlet vanes2 Variable freq drive3 No Return fan4 Propeller exhaust

16

Return/exhaust fan

capacity control method

0 None1 Tracking2 Bldg press3 Position

17Second pressure

sensor type

0 None1 Duct2 Bldg

18 Entering fan temp sensor

0 No1 Yes

19 Energy recovery

0 None1 Constant speed wheel2 Variable speed wheel

20 Final filter0 No1 Yes

21 Heating configuration

0 Draw through preheat1 Draw through reheat2 Blow through

22 Cooling configuration

0 Draw through1 Blow through

Table 22: Software configuration string (continued)Configuration string position Description Values (default in bold)

Daikin IM 696-4 33

Typical Wiring Diagrams


The applied rooftop unit wiring diagrams on the following pages are typical. They are included to show common factory and field wiring schemes. For exact wiring information pertaining to a particular unit, refer to the wiring diagrams supplied with the unit.

Note – Some of the component designations depend on unit sizes. The following legend applies to Figure 16 through Figure 25. For complete, exact component designations and locations, refer to the legend supplied with the unit.

Legend

ID Description Standard locationACT3, 4 Actuator motor, economizer Economizer sectionACT5 Actuator motor, discharge

isolation damperDischarge section

ACT6 Actuator motor, return air isolation damper

Return section

ACT7 Actuator motor, heat face/bypass

Coil section, heat

ACT8 Actuator motor, cool face/Bypass

Coil section, cool

ACT10, 11

Actuator motor, exhaust dampers

Return section

ACT12 Actuator motor, enthalpy wheel bypass damper

Energy recovery section

AFD10 Adjustable frequency drive, supply fan

AFD/supply fan section

AFD11 Adjustable frequency drive, evap cond. fans

Main/RCE control box

AFD20 Adjustable frequency drive, return/exhaust fan

AFD/ret. ex. fan section

AFD60 Adjust. freq. drive, energy recovery wheel(s)


AS Airflow switch, burner blower Gas heat boxBM Burner blower motor Heat section, gasC1–8 Power factor capacitors,

compressorsCondenser section

C10 Power factor capacitors, supply fan

Supply Fan section

C11 Capacitors, Speedtrol, circuit #1

Condenser bulkhead

C20 Power factor capacitors, return fan

Return section

C21 Capacitors, Speedtrol, circuit #2

Condenser bulkhead

CB10 Circuit breaker, supply fan Main control boxCB11 Circuit breaker, evaporative

condenser fan(s)Main/cond. control box

CB20 Circuit breaker, return/ exhaust fan

Main control box

CB60 Circuit breaker, energy recovery wheel

Main control box

CCB1, 2 Compressor control boards, refrig. circuits

Main control box

CPC Circuit board, main, micro controller

Main control box

CPR Circuit board, expansion, micro controller

Main control box

CS1, 2 Control switches, refrig. circuits Main/cond. control boxDAT Discharge air temperature

sensorDischarge section

DFLH Design flow lefthand sensor Return sectionDFRH Design flow righthand sensor Return sectionDHL Duct hi-limit Main control boxDS1 Disconnect, total unit or cond/

heatMain control box

DS2 Disconnect, SAF/RAF/controls Main control boxDS3 Disconnect, electric heat Electric heat boxDS4 Disconnect, condenser (RCS

Only)RCS control box

EAT Exhaust air temperature sensor


EFT Entering fan air temperature sensor

Supply fan section

EHB1 Staged electric heat board Main control boxERB1 Energy recovery board Main control boxERM1 Energy recovery wheel motor

#1Energy recovery section

ERM2 Energy recovery wheel motor #2


F1A, B Fuse, control circuit transformer (T1), primary

Main control box

F1C Fuse, control circuit transformer (T1), secondary

Main control box

F2 Fuse, control circuit transformer (T2), primary

Main control box

F3 Fuse, burner blower motor Main control box F4 Fuse, ctrl. circuit transformer

(T4), primaryMain control box

FB11, 12 Fuseblock, Speedtrol Main/cond. control boxFB31–40 Fuseblock, electric heat (top

bank)Electric heat box

FB41–50 Fuseblock, electric heat (bot. bank)

Electric heat box

FB65 Fuseblock, evap. cond. sump heater

Main/cond. control box

FD Flame detector Heat section, gasFLC Fan limit control Heat section, gasFP1, 2 Frost protection, refrig. circuits Coil section, coolFS1, 2 Freezestat control Coil section, heat/coolFSG Flame safeguard Gas heat boxGCB1 Generic condenser board,

refrig. circ.Main control box

GFR1, 2 Ground fault relay Main control boxGFS1, 2 Ground fault sensor Main control boxGFR4 Ground fault relay, condenser Condenser control boxGFS4 Ground fault sensor,

condenserCondenser control box

ID Description Standard location

34 Daikin IM 696-4


GRD Ground All control boxesGV1 Gas valve, pilot Heat section, gasGV2 Gas valve, main/safety Heat section, gasGV3 Gas valve, redundant/safety Heat section, gasGV4–8 Gas valve, main, hi turn down Heat section, gasHL1–10 Hi-limits, pwr, elec heaters (top

bank)Heat section, electric

HL11–20 Hi-limits, pwr, elec heaters (bot. bank)

Heat section, electric

HL22 Hi-limits, gas heat (pre-filters) Supply fan sectionHL23 Hi-limits, gas heat (final filters) Final filter sectionHL31–40 Hi-limits, ctl. elec heaters (top

bank)Heat section, electric

HL41–50 Hi-limits, ctl. elec heaters (bot. bank)

Heat section, electric

HP1–4 Hi-pressure controls, refrig On compressorsHP5 Hi-pressure controls, gas Heat section, gasHS1 Heat switch, electric heat

shutdownMain control box

HS3 Heat switch, electric heat deadfront interlock

Electric heat box

HTR1–6 Crankcase heaters On compressorsHTR65 Heater, sump Evap. condenser sectionHTR66 Heater, vestibule Evap. condenser vestibuleHUM1 Humidstat sensor Energy recovery sectionIT Ignition transformer Gas heat boxLAT Leaving air temperature sensor Energy recovery sectionLP1, 2 Low-pressure controls,

refrigerationOn compressors

LP5 Low-pressure control, gas Heat section, gasLR10 Line Reactor, supply fan Inverter bypass boxLR20 Line reactor, return/exhaust fan Inv. bypass/main cont. boxLS1, 2 Limit switch, low fire, high fire Gas heat boxLT10–23 Light, cabinet sections Supply fan sectionM1–8 Contactor, compressor Main/cond. control boxM10 Contactor, supply fan Main control boxM11–18 Contactor, condenser fans,

circuit #1Main/cond. control box

M20 Contactor, return fan Main control boxM21–28 Contactor, Condenser fans,

circuit #2Main/cond. control box

M29 Contactor, burner motor Gas heat boxM30 Contactor, reversing, invertor

bypass, supply fanInverter bypass box

M31–39 Contactor, electric heat (top bank)

Electric heat box

M40 Contactor, reversing, Invertor Bypass, Return Fan

Inverter bypass box

M41–50 Contactor, electric heat (bot. bank)

Electric heat box

ID Description Standard locationM60 Contactor, energy recovery

wheelMain control box

M64 Contactor, sump pump Main/cond. control boxM65 Contactor, sump heater Main/cond. control boxMCB Microprocessor circuit board Main control boxMJ Mechanical Jumper All control boxesMMP1–8 Manual motor protector,

compressorsMain/cond. control box

MMP10 Manual motor protector, supply fan

Main control box

MMP11–18

Manual motor protector, cond. fans, ckt#1


MMP20 Manual motor protector, return fan

Main control box

MMP21–28

Manual motor protector, cond. fans, ckt#2


MMP30 Manual motor protector, invrtr. bypass, sup. fan

Inverter bypass box

MMP40 Manual motor protector, invrtr. bypass, ret. fan

Inverter bypass box

MMP51, 52, 53

Manual motor protector, exhaust fan(s)

Prop exhaust box

MMP60 Manual motor protector, energy recovery wheel

Main control box

MMP64 Manual motor protector, sump pump

Main/RCE control box

MP1–6 Motor protector, compr.#1-6 On compressorsOAE Outside air enthalpy sensor Economizer sectionOAT Outside air temperature sensor Economizer sectionOP1–4 Oil pressure controls,

compr.#1-4Condenser section

PB1, 2 Power block, power distribution Main control boxPB3 Power block, power

distribution, electric heatElectric heat box

PB4 Power block, power distribution, condenser

Condenser control box

PB9, 10 Power block, supply fan Junction box, split unitPB11, 12 Power block, power distribution Main control boxPB19, 20 Power block, return/exhaust

fanJunction box, split unit

PC5 Pressure control, clogged filter Pre filter sectionPC6 Pressure control, clogged final

filterFinal filter section

PC7 Pressure control, proof airflow Supply fan sectionPC8 Pressure control, minimum

airflowCoil section, cool

PC12, 22 Pressure control, Fantrol Condenser sectionPM1 Phone modem Main control boxPS1, 2 Pumpdown switches, refrig

circuitsMain/cond. control box

PS3 Pumpdown switch, RFS only Main control boxPVM1, 2 Phase voltage monitor Main control box


Daikin IM 696-4 35


PVM4 Phase voltage monitor, condenser


R1, 2 Relay, hi pressure reset Main/cond. control boxR3, 4 Relay, hi pressure delay Main/cond. control boxR5–8 Relay, safety, cool fail Main/cond. control boxR9, 10 Relay, compressor lockout Main/cond. control boxR11, 12 Relay, Speedtrol fan cycling Main/cond. control boxR20 Relay, Heat, gas/ steam/ hot

water Gas heat/main cont. box

R21, 22 Relay, heat, gas (hi-turn down) Gas heat boxR23 Relay, heat, gas & electric Gas/electric heat boxR24 Relay, heat alarm, gas Main control boxR25 Relay, heat, gas, start supply

fan inverterMain control box

R26 Relay, isol/exh. dampers, open/close

Main control box

R28 Relay, isolation damper, safety Main control boxR29 Relay, remote fire alarm Main control boxR30 Relay, cool valve with face

bypassMain control box

R45 Relay, UV lights Main control boxR46, 47 Relay, supply fan inverter, incr/

decrMain control box

R48, 49 Relay, return fan inverter, incr/decr

Main control box

R56 Relay, heater, water pipe Main/RCE control boxR58,59 Relay, heat wheel inverter, incr/

decrMain control box

R60 Relay, energy recovery wheel, enable

Main control box

R61 Relay, smoke detector, discharge air

Main control box

R62, 63, 65

Relay, use on specials Main control box

R64 Relay, sump pump Main/RCE control boxR66 Relay, smoke detector, return

airMain control box

R67 Relay, supply fan, enable Main control boxR68 Relay, return fan, enable Main control boxR69 Relay, Inv. bypass VAV box

interlockMain control box

R70–79 Relay, use on specials Main control boxRAE Return air enthalpy sensor Return sectionRAT Return air temperature sensor Return sectionREC1 Receptacle, main box Main control boxREC2 Receptacle, condenser box Condenser control boxREC3 Receptacle, field power, 115V Discharge bulkheadREC10–23

Receptacle, cabinet sections Cabinet sections

ID Description Standard locationS1 Switch, system on/off Main control boxS2 Switch, system on/off,

condenser unitCondenser control box

S3 Switch, furnace on/off Gas heat boxS4 Switch, inverter bypass, on/ off Main control boxS7 Switch, local on/auto/off to

controllerMain control box

S10–23 Switches, cabinet section lights Cabinet sectionsS40–45 Switches, door interlock, UV

lightsCabinet sections

SC11 Speed control, circuit #1 Condenser bulkheadSC21 Speed control, circuit #2 Condenser bulkheadSD1 Smoke detector, supply Discharge sectionSD2 Smoke detector, return Return sectionSPS1, 2 Static pressure sensors, duct/

buildingMain control box

SR1-3 Sequencing relays, electric heat

Electric heat box

SV1, 2 Solenoid valves, liquid Condenser sectionSV5, 6 Solenoid valves, hot gas Condenser sectionSV61, 62 Solenoid valves, sump, fill Main/RCE control boxSV63 Solenoid valves, sump, drain Main/RCE control boxSWT Sump water temperature

sensorEvap. condenser section

T1 Transformer, main control (line/115VAC)

Main control box

T2 Transformer, control input (115/24VAC)

Main control box

T3 Transformer, control output (115/24VAC)

Main control box

T4 Transformer, exh. damper actuator (115/12VDC)

Main control box

T5 Transformer, electric heat Electric heat boxT6 Transformer, dew point

controller (115/24VAC)Main control box

T9 Transformer, refrig. circuit 24V Main control boxT11 Transformer, speedtrol (line/

240VAC)Condenser section

TB1 Terminal block, internal Main control boxTB2 Terminal block, field Main control boxTB3 Terminal blocks, factory Main control boxTB4 Terminal block, RFS, field Main control boxTB5 Terminal block, RCS, field Condenser control boxTB6 Terminal block, RCS, factory Condenser control boxTB7 Terminal block, 115V

convenience outlet, fieldMain control box

TB8 Terminal block, 115V conv. outlet, RCS, field


TB11 Terminal block, heat Heat control box


36 Daikin IM 696-4


200/ H200

1. Field wiring

3. Shielded wire/cable

4. Main control box terminals

5. Auxilliary box terminals

6. Field terminals

7. Plug connector

8. Wire/harness number

General Notes

2. Factory wiring

9. Wire nut/IDWN7

TB23 Terminal block, oil pressure box, RPE/RCE only

Evap. condenser vestibule

TB25, 26, 27, 28

Terminal block, split unit junction box

Junction box, split unit

TC12, 13, 14

Temperature controls, Fantrol Condenser section

TC56 Temperature control, water pipe heater


TC66 Temperature control, vestibule exhaust fan


TD1, 2 Time delay, compressor lockout


TD3, 4 Time delay, hi-pressure Main/cond. control boxTD5–8 Time delay, part winding,

compr #1 - 4Main control box

TD10 Time delay, hi turn down burner Gas heat boxTD11, 12 Time delay, low ambient Main/cond. control boxTR1, 2 Transducer, pressure Main control boxU1, 2 Unloaders, compressors On compressorsUV Ultra-violet light(s) Coil/discharge sectionVM1 Valve motor #1, heating Gas heat box/ heat sectionVM5 Valve motor #5, cooling Coil section, coolVV1 Vent valve, gas heat Heat Section, GasWL63 Water level, sump, fill Evap. condenser sectionWL64 Water level, sump, low water Evap. condenser sectionZNT1 Zone temp. sensor, setback Field installed


Daikin IM 696-4 37


Figure 16: VAV control inputs (DAC)/1

.68

/1.6

8

H22

8-1

H22

9-2

DRN

-4

CO

NTA

CT

MU

ST B

E O

PEN

DU

RIN

G N

ORM

AL

OPE

RATI

ON

TO C

CB

1

H23

1-1

H23

2-2

DRN

-4

H23

0-3

H22

3-1

H22

4-2

DRN

-4

BU

ILD

ING

BA

CK

NET

MST

P

H22

1-2

H22

7-2

DRN

-4

H22

6-1

H22

0-1

DRN

-4

NO

TES

TO F

IELD

:

1.RE

FER

TO I.

M. F

OR

MIC

ROTE

CH

II A

LARM

CO

NFI

GU

RATI

ON

.

2.TO

EN

AB

LE S

OFT

WA

REIN

TERN

AL

TIM

E C

LOC

K,

TERM

INA

LS 1

01 &

102

MU

ST N

OT

BE

JUM

PERE

D

THE

FIEL

D T

O R

EMO

VE

JUM

PERS

WH

ENIN

STA

LLIN

G C

OO

L/H

EAT

ENA

BLE

SW

ITC

HES

3.

SHO

WN

IN N

IGH

TO

R U

NO

CC

UPI

EDM

OD

E

DIS

CH

ARG

E A

IRTE

MPE

RATU

REEX

TERN

AL

RESE

T

H22

8-4

H22

8-1

H23

1-1

H23

1-3

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

156

203

200

610

115V

24V

CLA

SS 2

RS23

2 PO

RT

AI7

AI6

AI5

BI7

BI6

BI5

AI4

AI3

AI2AI1

BI4

BI3

BI2BI1

MIC

ROPR

OC

ESSO

R C

ON

TRO

L B

OA

RD AN

ALO

GIN

PUT

BIN

ARY

INPU

T

SW1

#6(E

NTE

RIN

G F

AN

TEM

PERA

TURE

)

GA

S H

EAT

ALA

RM

SW1

#7

(DRI

VE

SID

E)

5VD

CPW

R SU

P

DIS

PLA

Y

IS L

OC

ATE

D O

N D

EAD

FRO

NT

A (D

B9-

MA

LE) C

ON

NEC

TIO

N

CO

NN

.

SW1

#4(R

ETU

RN A

IRSE

NSO

R)

OFF

ON A

UTO

SW1

#2

SW1

#5

SW1

#3

SW1

#1

(DIS

CH

ARG

E A

IRSE

NSO

R)

(OU

TDO

OR

AIR

SEN

SOR)

CO

OL_

ENA

BLE

HEA

T_EN

AB

LE

MA

NU

AL_

ENA

BLE

OV

ERRI

DE

REQ'

D FO

R NI

GHT S

ETBA

CK O

R SP

ACE R

ESET

ZO

NE

OR

SPA

CE

SEN

SOR

AIR

FLO

W

54

32

41

76R54R32R1

7C

7

6C

6

5C

5

4C

4

3C

3

2C

2

1C

1

P1

REF

N2-

N2+

J1

CO

M

24V

AC

14 15 GRD

1610 11 12 13

21

21

43

23 24

1 2

4

WH

T

BLK

DRN

35

111

WH

T

BLK

DRN

123

3 4

1 2

G

5V+

H 5V-

RED

WH

T

BLK

DRN

RS-2

32

1 2

4

WH

T

BLK

DRN

REF

N2-

N2+

128

129

WH

T

BLK

DRN

GRD

3

2

1

104

102

105

106

101

101

1 2

4

AC

1 2

4

AC

WH

T

BLK

DRN

WH

T

BLK

DRN

WH

T

BLK

DRN

WH

T

BLK

DRN

4

3

132

133

120

121

GRD

GRD

108

41

12

112

3/Y

1/R

101

PVM

1

T2

MC

B

TB1B

T1_1

15V

AC

T1_N

TB1B

F3

S1/6

.00

115T

1/1.

68

S1S1

TB1D

PL5

+PP

EFT

+N

B

R24

TB2

N2+

/8.0

6

N2-

/8.0

6

REF/

8.07

DFR

H_D

S+

NB

PL22

+PP

PWR

KEY

PAD

SERI

AL

PL1

+PP

RAT

+N

B

BC

NT

TB2

S7

TB2

TB2

TB2

TB2

TB2

TB2

PL2

+PP

DA

T+

NB

PL3

+PP

OA

T+

NB

TIM

E_C

LOC

K+

NB

ZN

T1+

NB

TB2

TB2

PL15

+PP

PL15

+PP

PC7

+N

B

TB_1

01

TB2

FS1

+N

BTB

2TB_1

01

3

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21 3

=N

TC

1=

RT

DN

J=V

DC

2=

MA

2

tv

133

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21

COM

M. C

ARD

BACN

ET-M

STP

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13 3

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21

3

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21

3

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21

203A

168A

168B

204A

168C

204B

201A

200A

230C

229C

228C

225A

210D

210C

209C

214B

233C

232C

231C

214A

208C

225C

224C

223C

211A

210A

209A

227D

227C

226C

221D

221C

220C

219C

218C

217C

217A

215A

215C

228A

231A

220

223

(Sc

he

ma

tic

co

nti

nu

es

on

ne

xt

pa

ge

.)

38 Daikin IM 696-4


Figure 16: VAV control inputs (DAC), continued

/8.01

/4.00

/3.00

/1.6

8

H25

2-2

H25

O-S

R

H25

0-4

H25

O-+

H25

2-1

H26

2-8

H26

1-10

DRN

-13

H26

4-6

H26

5-8

DRN

-3

OPE

N A

NA

LOG

INPU

T(S

HO

WN

WIT

H F

AN

IN O

FF P

OSI

TIO

N)

H24

3-4

H24

4-2

H24

5-3

DRN

-1

H23

4-2

H23

5-1

DRN

-4

H23

6-3

FILT

ERIN

DIC

ATI

ON

FOR

FIEL

DH

242-

4

H24

3-1

H24

2-3

H23

9-3

H24

0-4

H24

1-5

DRN

-9

OPE

N A

NA

LOG

INPU

T

H23

7JM

P

H23

5-6

H23

5-5

H23

7-4

H23

7-3

H23

7-5

H23

7-3

H26

7-1

H26

7-2

H26

5-1

H26

5-2

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

440

440

313

265

267

445

445

BI8

BI9

BI1

0

AI9

AI1

0

AI8

AI1

1

AI1

2

15V

DC

AI1

3

BI1

5

AI1

5

AI1

4

BI1

6

BI1

2

BI1

4

BI1

3

AI1

6

BI1

1

DU

CT

HI-

LIM

IT

HUM

#15SW

4

#16SW

4

#15SW

4

#16SW

4

500H

OM

500H

OM

SW4

#13

(DU

CT

STA

TIC

PRES

SEN

SOR)

SW4

#14

EXTE

RNA

L EX

HA

UST

SW

ITC

H

SW4

#10

CC

W(C

L)

CW

(OP)

SW1

#8

(OPP

DRI

VE

SID

E)

SW4

#12

PRE

FILT

ER

(0-5

V)

SPA

CE

HU

MID

ITY

SEN

SOR

SW4

#9

CC

W(O

P)

CW

(CL)

SW4

#11

RA S

MO

KE

DET

ECTO

R

SA S

MO

KE

DET

ECTO

R

16R1514R1312R1110R98R

16C1615C1514C

1413C1312C1211C1110C109C

9

8C

8

31

14 2

SR+

TR1

TR

3

1

2

S+

10

8

13

WH

T

BLK

DRN

WH

T

BLK

DRN

6 8 3

8-7+ 8-7+

WH

T

BLK

DRN

-

+S

103

GTY

14 32

RED

WH

T

BLK

DRN

321

4 1

2 3

DRN

RED

WH

T

BLK

4

1

109

32 3

1

131

WH

T

BLK

DRN

PWR

CO

M

OU

T12

6

127

GRD

107

748

9 43 5

DRN

WH

T

RED

BLK

34

17 166

517 16

6

6

35

113

21

115

H

111

5H

2

87

87

T2_1

15V

AC

DH

L

24V

CO

M/2

.47

24V

CO

M/2

.51

PL13

+PP

PL13

+PP

PL13

+PP

OA

E+

NB

RAE

+N

B

PL7

+PP PL

8+

PP

AFD

10+

NB

AFD

20+

NB

SPS1

TB2

EXS

+N

B

VM

1+

NB

PL18

+PP

DFL

H_O

DS

+N

BPL

23+

PP

PL14

+PP

TB2

PL14

+PP

PC5

+N

B

TB2

SHS1

+N

B

TB2

TB2

AC

T3+

NB

PL11

+PP

PL21

+PP

PL20

+PP

SD1

+N

BPL

20+

PP

SD2

+N

B

PL21

+PP

PL20

+PP

PL21

+PP

TB2

PL21

+PP

PL21

+PP

SD2

+N

B

T1_N

PL20

+PP

SD1

+N

BPL

20+

PP

R61

R66

SIG

_SD

/2.3

8

SIG

_SD

/2.4

1

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NT

C

1=

RT

DN

J=V

DC

2=

MA

2

tv

13 3

NJ=

VD

C

tv

3=

NT

C2

=M

A1

=R

TD

21

260A

252A

JPR

266C

265C

264C

263C

262C

261C

257C

257A

246C

245C

244C

214B

214B

236C

235C

234C

254C

253C

252C

243A

242A

241C

240C

214B

238C

203B

204B

237A

235A

204B

204B

168C

(Sch

emat

ic c

on

tin

ues

on

pre

vio

us

pag

e.)

Daikin IM 696-4 39


Figure 17: Constant volume control inputs (SCC)/1

.68

/1.6

8

H22

0-1

H22

1-2

DRN

-4

H22

5-1

H22

6-4

H22

6-2

NO

TES

TO F

IELD

:

1.RE

FER

TO I.

M. F

OR

MIC

ROTE

CH

II A

LARM

CO

NFI

GU

RATI

ON

.

2.TO

EN

AB

LE S

OFT

WA

REIN

TERN

AL

TIM

E C

LOC

K,

TERM

INA

LS 1

01 &

102

MU

ST N

OT

BE

JUM

PERE

D

THE

FIEL

D T

O R

EMO

VE

JUM

PERS

WH

ENIN

STA

LLIN

G C

OO

L/H

EAT

ENA

BLE

SW

ITC

HES

3.

SHO

WN

IN N

IGH

TO

R U

NO

CC

UPI

EDM

OD

E

TO C

CB

1

H23

7JM

P

H23

5-6

H23

5-5

H23

7-4

H23

7-3

H23

7-5

H23

7-3

H23

7JM

P

H23

5-6

H23

5-5

H23

7-4

H23

7-3

H23

7-5

H23

7-3

H23

1-1

H23

1-3

H22

8-4

H22

8-1

H23

1-1

H23

2-2

H23

4-2

H23

5-1

DRN

-4

DRN

-4

H23

6-3

H23

0-3

H22

3-1

H22

4-2

DRN

-4

BU

ILD

ING

BA

CK

NET

MST

P

OPE

N A

NA

LOG

INPU

T

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

265

267

SW1

#2

SW1

#5

SW1

#3

SW1

#1

OFF

ON A

UTO

(DIS

CH

ARG

E A

IRSE

NSO

R)

(OU

TDO

OR

AIR

SEN

SOR)

6

WA

LLST

AT

OV

ERRI

DE

CO

OLI

NG

&

HEA

TIN

G

SETP

OIN

T

ZON

E SE

NSO

R

MA

NU

AL_

ENA

BLE

CO

OL_

ENA

BLE

HEA

T_EN

AB

LE

AIR

FLO

W

SW1

#8

SW1

#7

(DRI

VE

SID

E)

(OPP

DRI

VE

SID

E)

5VD

CPW

R SU

P

SW1

#4(R

ETU

RN A

IRSE

NSO

R)

IS L

OC

ATED

ON

DEA

DFR

ON

T

A (D

B9-

MA

LE) C

ON

NEC

TIO

N

CO

NN

.

DIS

PLAY

SW1

#6

115V

24V

CLA

SS 2

RS23

2 PO

RT

BI8

AI8

AI7

AI6

AI5

BI7

BI6

BI5

AI4

AI3

AI2AI1

BI4

BI3

BI2BI1

MIC

ROPR

OC

ESSO

R C

ON

TRO

L B

OA

RD AN

ALO

GIN

PUT

BIN

ARY

INPU

T

3

2

1

104

102

105

106

101

101

1 2

4

AC

1 2

4

AC

120

121

132

3

4

WH

T

BLK

DRN

WH

T

BLK

DRN

BLK

RED

WH

T

DRN

GRD

WH

T

BLK

DRN

34

17 166

517 16

6

6

35

113

3

113

112

3/Y

1/R

101

108

41

12

123 321

3 4

41 2 1

2 3

G

5V+

H 5V-

RED

WH

T

BLK

DRN

DRN

RED

WH

T

BLK

1 2

4

WH

T

BLK

DRN

RS-2

32

REF

N2-

N2+

128

129

WH

T

BLK

DRN

GRD

54

32

41

8R76R54R32R1

8C

8

7C

7

6C

6

5C

5

4C

4

3C

3

2C

2

1C

1

P1

REF

N2-

N2+

J1

CO

M

24VA

C

14 15 GRD

1610 11 12 13

21

23 24

S7

TB2

TB2

TB2

TB2

TB2

TB2

PL2

+PP

DAT

+N

B

PL3

+PP

OAT

+N

B

TB2

ZN

T1+

NB

TIM

E_C

LOC

K+

NB

N2+

/8.0

6

N2-

/8.0

6

REF/

8.07

PL21

+PP

PL20

+PP

SD1

+N

BPL

20+

PP

SD2

+N

B

PL21

+PP

PL20

+PP

PL21

+PP

TB2

+PP

TB2

TB_1

01

TB2

FS1

+N

BTB

2TB_1

01

TB2

PL15

+PP

PL15

+PP

PC7

+N

B

DFR

H_D

S+

NB

DFL

H_O

DS

+N

B

PL22

+PP

PL23

+PP

PWR

PL1

+PP

RAT

+N

B

SERI

AL

KEY

PAD

BC

NT

TB2

PVM

1

T2

MC

B

TB1B

T1_1

15VA

CT1

_N

TB1B

S1TB

1D

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13 3

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

21

3

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

21

3

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

21 3

=N

TC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

133

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

21

COM

M. C

ARD

BACN

ET-M

STP

3

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

21

227D

227C

226C

222C

221C

220C

217C

217A

215A

215C

210D

210C

209C

235A

231A

228A

214B

214B

236C

235C

234C

233C

232C

231C

214A

225C

224C

223C

208C

211C

203A

203B

204A

204B

204A

168A

168C

237A

220

223

(Sch

emat

ic c

on

tin

ues

on

nex

t p

age.

)

40 Daikin IM 696-4


Figure 17: Constant volume control inputs (SCC), continued

/1.6

8

/8.01

/3.00

OPE

N B

INA

RYIN

PUT

OPE

N B

INA

RYIN

PUT

H24

3-4

H24

4-2

H24

5-3

DRN

-1

H25

2-2

H25

O-S

R

H25

0-4

H25

O-+

H25

2-1

OPE

N A

NA

LOG

INPU

T

H23

9-3

H24

0-4

H24

1-5

DRN

-9

H23

7JM

P

H23

5-6

H23

5-5

H23

7-4

H23

7-3

H23

7-5

H23

7-3

H26

7-1

H26

7-2

H26

5-1

H26

5-2

OPE

N A

NA

LOG

INPU

T

FILT

ERIN

DIC

ATIO

NFO

R FI

ELD

H24

2-4

H24

3-1

H24

2-3

OPE

N A

NA

LOG

INPU

T

OPE

N A

NA

LOG

INPU

T

H23

7JM

P

H23

5-6

H23

5-5

H23

7-4

H23

7-3

H23

7-5

H23

7-3

H26

7-1

H26

7-2

H26

5-1

H26

5-2

FILT

ERIN

DIC

ATIO

NFO

R FI

ELD

H24

2-4

H24

3-1

H24

2-3

H23

1-1

H23

1-3

H23

1-1

H23

2-2

H23

4-2

H23

5-1

DRN

-4

DRN

-4

H23

6-3

H23

0-3

H24

7-1

H24

7-4

H24

8-2

OPE

N A

NA

LOG

INPU

T

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

343

313

265

267

253

253

252

253

253

SW4

#10

CC

W(C

L)

CW

(OP)

HUM

SW4

#11SW

4

#9

CC

W(O

P)

CW

(CL)

RA S

MO

KE

DET

ECTO

R

SA S

MO

KE

DET

ECTO

R

SW4

#14SW

4

#12

(0-5

V)

SPA

CE

HU

MID

ITY

SEN

SOR

SW4

#15 SW

4

#16SW

4

#12

PRE

FILT

ER

(0-5

V)

SPA

CE

HU

MID

ITY

SEN

SOR

SW1

#8

SW1

#7

(DRI

VE

SID

E)

(OPP

DRI

VE

SID

E)

FIN

AL

FILT

ER

BI8

BI9

BI1

0

AI9

AI1

0

AI8

AI7

AI1

1

AI1

2

15V

DC

AI1

3

BI1

5

AI1

5

AI1

4

BI1

6

BI1

2

BI1

4

BI1

3

AI1

6

BI1

1

BI7

SW4

#13

107

847

14 32

DRN

RED

WH

T

BLK

14 2

SR+

TR1

TR

3

1

2

S+

748

9 43 5

DRN

WH

T

RED

BLK

34

17 166

517 16

6

6

35

113

21

115

H

111

5H

2

4

1

109

3

131

WH

T

BLK

DRN

PWR

CO

M

OU

T12

6

127

GRD

3

113

1

109

2 3

1

131

WH

T

BLK

DRN

PWR

CO

M

OU

T12

6

127

GRD

112

3/Y

1/R

101

123 321

3 4

41 2 1

2 3

RED

WH

T

BLK

DRN

DRN

RED

WH

T

BLK

12 3

1

4 2

16R1514R1312R1110R98R7

16C1615C1514C

1413C1312C1211C1110C109C

9

8C

8

7C

7

TB2

VM

1+

NB

PL18

+PP

24V

CO

M/2

.47

24V

CO

M/2

.51

PL13

+PP

PL13

+PP

PL13

+PP

OA

E+

NB

RA

E+

NB

AC

T3+

NB

PL11

+PP

PL21

+PP

PL20

+PP

SD1

+N

BPL

20+

PP

SD2

+N

B

PL21

+PP

PL20

+PP

PL21

+PP

TB2

PL21

+PP

PL21

+PP

SD2

+N

B

T1_N

PL20

+PP

SD1

+N

BPL

20+

PP

PL14

+PP

TB2

PL14

+PP

TB2

SHS1

+N

B

TB2

+PP

TB2

TB2

PC5

+N

B

TB2

SHS1

+N

B

TB2

TB2

FS1

+N

BTB

2TB_1

01D

FRH

_DS

+N

B

DFL

H_O

DS

+N

B

PL22

+PP

PL23

+PP

PL6

+PP

PC6

+N

BPL

6+

PP

T2_1

15VA

C

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13 3

NJ=

VD

C

tv

3=

NTC

2=

MA

1=

RT

D

213

=N

TC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

3=

NTC

1=

RT

DN

J=V

DC

2=

MA

2

tv

13

246C

245C

244C

214B

252A

JPR

241C

240C

214B

238C

235A

254C

253C

252C

243A

231A

214B

236C

235C

234C

233C

232C

231C

248A

203B

204B

168C

204A

237A

242A(S

chem

atic

co

nti

nu

es o

n p

revi

ou

s p

age.

)

Daikin IM 696-4 41


Figure 18: Control actuator outputs (constant volume RPS with hot water or steam heat with economizer) /1

.68

/2.6

8

/4.00

/4.00

NO

TES

TO F

IELD

:

1.A

LL F

IELD

MO

UN

TED

REL

AYS

MU

ST H

AV

E 24

VAC

CLA

SS2

CO

ILS

THE

TOTA

L VA

OF

THE

FIEL

DM

OU

NTE

D R

ELAY

S C

AN

NO

TEX

CEE

D 1

5 VA

2.

SOU

RCE

1-8

WIR

ED IN

TERN

AL

TO M

OTH

ERB

OA

RD

H31

3-1

H31

3-2

H31

5-6

H31

5-8

H31

6-7

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

207

207

207

364

362

207

207

239

SRC

(FA

N_O

PERA

TIO

N)

(EX

T_A

LARM

_SIG

NA

L)B

O4

BO

3

24V

SRC

jprs

24V

SRC

jprs

115V

24V

CLA

SS 2

24V

SRC

jprs

(OPE

N)BO

624

V S

RC

jprs

(EC

ON

/AC

T)

(CLO

SE)BO

5

1-8

102

1819

2021

4NO

4

3NO

3

117

115

116

32

41

86

7

21

6NO

6

3-C

CW

X-C

OM

L2

2-C

W

L1

5NO

5

R26

T1_N

T2_1

15VA

C

TB1C

TB1C

MC

B

MC

B

T3_2

4VT3

_CO

M

TB2

TB2

TB2

T3

PL11

+PP

PL11

+PP

PL11

+PP

PL11

+PP

PL11

+PP

MC

B

AC

T3+

NB

MC

B

307A

305A

303A

303B

318A

315A

315B

168C

203B

(Sch

emat

ic c

on

tin

ues

on

nex

t p

age.

)

42 Daikin IM 696-4


Figure 18: Control actuator outputs (constant volume RPS with hot water or steam heat with economizer), continued

H3

65

-1

H3

66

-3

H9

69

H9

68

H9

64

H9

65

H3

43

-5H

34

3-6

H3

44

-7

H343-9

H3

44

-8

33

8

33

9

34

0

34

1

34

2

34

3

34

4

34

5

34

6

34

7

34

8

34

9

35

0

35

1

35

2

35

3

35

4

35

5

35

6

35

7

35

8

35

9

36

0

36

1

36

2

36

3

36

4

36

5

36

6

36

7

36

8

36

9

30

6

30

6

20

72

07

24

3

REC

TIFI

ER

DC

12

V

11

5V

REL

IEF

DA

MP

ER(O

PP.

DR

SID

E)

REL

IEF

DA

MP

ER(D

RIV

ESI

DE)

HEA

T

(OP

EN)B1

0

(CLO

SE)B0

9

24

V S

RC

jprs

24

V S

RC

jprs

AC

AC

-+

L1X1

L2X2

1

3B

LK

WH

T

WH

T

BLK

8

9

11

33

36

35

34

5

76

5555555

6666666

5 87

9

6

L2X

-CO

ML1

3-C

CW

2-C

W

10

NO

10

9N

O9

REC

TT4

PL1

7+

PP

AC

T11

+N

B

AC

T10

+N

B

R2

6TB

1F

TB1

F

TB1

F

TB1

F

R2

6

PL1

8+

PP

PL1

8+

PP

PL1

8+

PP

PL18+PP

PL1

8+

PP

VM

1+

NB

MC

BM

CB

36

8A

36

7A

36

3B

36

2A

36

2B

33

9A

33

9C

(Sch

emat

ic c

on

tin

ues

on

pre

vio

us

pag

e.)

Daikin IM 696-4 43


Figure 19: Condensing section control, RPS 60 (with scroll compressors)/2

.68

/1.6

8/1

.68

H81

4-121.

3K O

HM

, 2W

H81

5-11

(OPE

N O

UTP

UT)

H82

7-10

H82

7-11

H81

7-3

H81

7-4

H81

5-7

MP1

JH

816-

5

MP3

J

H82

2-1

H82

0-3

H82

0-2

H82

1-8

H82

2-12

H81

5-6

J823

A

J823

B

H83

0-4

H83

0-3

H83

1-2

H83

1-4

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

817

836

822

207

711

817

727

822

807

705

757

709

711

808

815

727

809

820

115V

24V

CLA

SS 2

BO

4

NO

CO

MB

O5

NO

CO

MB

O6

NO

CO

M

BO

8

NO

CO

M

BO

7

NO

CO

M

BO

9

NO

CO

M

(CO

MPR

#5)

BO

2

NO

CO

M

(CO

MPR

#3) B

O3

NO

CO

M

BO

1

NO

CO

M

(CO

MPR

#1)

DIS

AB

LEEN

AB

LE

DIS

AB

LEEN

AB

LE

B02B01

JUM

PERS

J10

J9

CO

MPR

.C

ON

TRO

LB

OA

RD

INPU

TSB

I=B

INA

RYA

I=A

NA

LOG

(JU

MPE

R LO

CA

TED

JUST

UN

DER

CO

MM

. CA

RD)N2

BU

S

24V

SRC

jprs

BO

7

1413

35

32

41

21

GRD

1815131110

7

20

4

171612981965

213

CO

M2

BI6

BI5

BI4BI3

BI2

CO

M1

BI1

REF

N2-

N2+24

C

BI1

2

BI1

1

BI8

BI1

0

BI9

BI724

V

43

21

1413

111

2

12

8

GRD

30 312928

7NO

7

87A1

A2

A1

A2

A1

A2

1110

21

3A

1A

2

21

2222222

M2

T2

M1

T1

4

76

12(3

2)11

(31)

5

2221

12A

1A

2

21

2222222

1M

2

T2

M1

T1

2

12(3

2)11

(31)

2221

8

3

4 243

12

12

M1

R1

T9

PS1

CC

B1

CS1

N_2

4/8.

38

M3

REF/

2.11

N2+

/2.1

0

N2-

/2.1

0

REF/

8.40

N2+

/8.3

9N2-

/8.3

9

PL25

+PP

LP1

+N

B

PL25

+PP

RESI

STO

R

TB1E

TB1E

TB1E

TB1E

TB1E

MC

B

R1M12

M11

M13

115V

AC

/8.2

0

115V

AC

/8.1

5

PL27

+PP

PL27

+PP

HP3

+N

B

PL25

+PP

M1

HTR

1+

NB

MP1

+N

B

PL25

+PP

PL25

+PP

PL25

+PP

MM

P1

PL25

+PP

115V

AC

/8.1

4

M1

PL27

+PP

M3

HTR

3+

NB

PL27

+PP

MP3

+N

BPL27

+PP

115V

AC

/8.1

9

MM

P3

M3

PL27

+PP

PL27

+PP

PL10

+PP

PL9

+PP

PL9

+PPPL

10+

PPSV

5+

NB

SV1

+N

B

T2_1

15V

AC

T1_1

15V

AC

T1_N

(Sch

emat

ic c

on

tin

ues

on

nex

t p

age.

)

803A

805A

815A81

4A

812A

809A

808A

807A

805B

834A

833A

832A

823A

823B

822A

822B

819A

817A

817B

817C

814B

813A

830A

210D

209C

210C

210D

209C 21

0C

168A

168A

168A

203B

168C

168A

168A

44 Daikin IM 696-4


Figure 19: Condensing section control, RPS 60 (with scroll compressors), continued

H84

7-3

H84

8-2

(OPE

N O

UTP

UT)

H86

0-10

H86

0-11

H84

8-4

H85

0-7

H85

0-12

MP2

J

H84

8-9

H84

9-8

H85

5-7

H85

3-4

H85

5-6

MP4

J

H85

3-9

H85

4-8

J856

A

J856

B

H86

4-5H

863-

6H

863-

1

H86

4-1

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

855

850

869

719

850

735

855

840

720

762

724

719

841

848

735

842

853

BO

4

NO

CO

MB

O5

NO

CO

MB

O6

NO

CO

M

BO

8

NO

CO

M

BO

7

NO

CO

M

BO

9

NO

CO

M

(CO

MPR

#6)

BO

2

NO

CO

M

(CO

MPR

#4) B

O3

NO

CO

M

BO

1

NO

CO

M

(CO

MPR

#2)

DIS

AB

LEEN

AB

LE

DIS

AB

LEEN

AB

LE

B02B01

JUM

PERS

J10

J9

CO

MPR

.C

ON

TRO

LB

OA

RD

INPU

TSB

I=B

INA

RYA

I=A

NA

LOG

(JU

MPE

R LO

CA

TED

JUST

UN

DER

CO

MM

. CA

RD)N2

BU

S

1413

1413

21

35

43

21

GRD

1815131110

7

20

4

171612981965

213

CO

M2

BI6

BI5

BI4BI3

BI2

CO

M1

BI1

REF

N2-

N2+24

C

BI1

2

BI1

1

BI8

BI1

0

BI9

BI724

V

12

2

3

WH

T

BLK

DRN

87A1

A2

A1

A2

A1

A2

1011

21

A1

A2

7M

2

T2

M1

T1

2222222

12

42

19

8

12(3

2)11

(31)

2221

A1

A2

7M

2

T2

M1

T1

2222222

6

42

19

8

12(3

2)11

(31)

2221

5

1 1

61

2

12

M4

M2

PS2

R2

CS2

CC

B2

N_2

4/8.

06

LP2

+N

BPL

26+

PP

PL26

+PP

N2+

/8.0

9

N2-

/8.0

8

REF/

8.09

115V

AC

/8.5

3

R2

115V

AC

/8.4

8

M22

M21

M23

PL28

+PP

PL28

+PP

HP4

+N

B

M2

PL26

+PP

MP2

+N

B

PL26

+PP

PL26

+PP

HTR

2+

NB

PL26

+PP

PL26

+PP

115V

AC

/8.4

8

MM

P2

M2

M4

PL28

+PP

MP4

+N

B

PL28

+PP

PL28

+PP

HTR

4+

NB

PL28

+PP

PL28

+PP

115V

AC

/8.5

3

MM

P4

M4

PL9

+PP

PL10

+PP

PL9

+PP

PL10

+PP

SV6

+N

B

SV2

+N

B

848A84

7A

845A

842A

841A

840A

838A

867A

866A

865A

856A

856B

855A

855B

852B

850A

850B

850C

847B

864A

805A

209C

210C

210D

168A

168A

168A

168A

(Sch

emat

ic c

on

tin

ues

on

pre

vio

us

pag

e.)

Daikin IM 696-4 45


Figure 20: Condensing section control, RPS 135 (with reciprocating compressors)/2

.68

/1.6

8/1

.68

H83

0-4

H83

0-3

H83

1-2

H83

1-4

H82

7-10

H82

3-10

H82

3-2

H82

7-11

H81

7-3

H81

7-4

H81

5-7

MP1

JH

817D

H80

0BH

816-

5

H81

5-6

MP3

J

H82

2-1

H82

2-12

H82

0-3

(TD

3 C

LOSE

S FO

R5

SEC

ON

DS

AFT

ERB

EIN

G E

NER

GIZ

ED)

H82

0-2

H82

1-8

H80

0B

823A

823A

823A

823A

H81

7BH

817C

H82

2AH

822B

H80

5

H80

5H

822D

H81

4-121.

3K O

HM

, 2W

H81

5-11

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

835

819

816

706

817

821

739

822

807

705

757

719

709 83

2

706

808

815

710

817

739

809

820

824

743

822

817

836

822

207

2 M

IN

2 M

IN

115V

24V

CLA

SS 2

BO

4

NO

CO

MB

O5

NO

CO

MB

O6

NO

CO

M

BO

8

NO

CO

M

BO

7

NO

CO

M

BO

9

NO

CO

M

(CO

MPR

#5)

BO

2

NO

CO

M

(CO

MPR

#3) B

O3

NO

CO

M

BO

1

NO

CO

M

(CO

MPR

#1)

DIS

AB

LEEN

AB

LE

DIS

AB

LEEN

AB

LE

B02B01

JUM

PERS

J10

J9

CO

MPR

.C

ON

TRO

LB

OA

RD

INPU

TSB

I=B

INA

RYA

I=A

NA

LOG

(JU

MPE

R LO

CAT

EDJU

ST U

ND

ERC

OM

M. C

ARD

)N2

BU

S

24V

SRC

jprs

BO

7

CO

MPR

#1

4 243

12

12

87A1

A2

A1

A2

A1

A2

A1

A2

87

15

10

35

1110

2

21

21

3A

1A

2

21

2222222

42

31

4

A1

A2

7

3840

120

T2

ML

6

12(3

2)11

(31)

5

2221

21

50

12A

1A

2

21

2222222

142

31

87 A1

A2

3

4547

120

T2

ML

3

12

2

12(3

2)11

(31)

2221

8

21

51

39

46

1413

35

32

41

21

GRD

1815131110

7

20

4

171612981965

213

CO

M2

BI6

BI5

BI4BI3

BI2

CO

M1

BI1

REF

N2-

N2+24

C

BI1

2

BI1

1

BI8

BI1

0

BI9

BI724

V

43

21

1413

111

2

12

8

GRD

30 312928

7NO

7

2222222

21

8

PL10

+PP

PL9

+PP

PL9

+PPPL

10+

PPSV

5+

NB

SV1

+N

B

R1M12

M11

115V

AC

/8.2

0

115V

AC

/8.1

5

M14

M13

R11

R11

PL25

+PP

R3

PL27

+PP

PL27

+PP

PL25

+PP

HP3

+N

B

HP1

+N

B

PL25

+PP

M1

HTR

1+

NB

MP1

+N

B

PL25

+PP

M5

PL25

+PP

TB3

OP1

+N

B

OP1

+N

B

PL25

+PP

MM

P1

PL25

+PP

115V

AC

/8.1

4

M1

TD5

PL27

+PP

M3

HTR

3+

NB

PL27

+PP

MP3

+N

B

R3 M7

PL27

+PP

TB3

OP3

+N

B

OP3

+N

B

TD3

PL27

+PP

115V

AC

/8.1

9

MM

P3

M3

PL27

+PP

TD7

TB3 TB

3O

P3/8

.53

OP1

/8.4

8

M1

R1

T9

PS1

CC

B1

CS1

N_2

4/8.

38

M3

REF/

2.11

N2+

/2.1

0

N2-

/2.1

0

REF/

8.40

N2+

/8.3

9N2-

/8.3

9

PL25

+PP

LP1

+N

B

PL25

+PP

RESI

STO

R

TB1E

TB1E

TB1E

TB1E

TB1E

MC

B

U1_

1+

NB

PL25

+PP

T2_1

15VA

C

T1_1

15VA

CT1

_N

830A

835A

834A

832B

832B

832A

823A

823D

823B

823C

822A

822B

819A

818A

818B

818C

817A

817B

817C

817D

814B

803A

805A

815A81

4A

812A

809A

808A

807A

805B

829A

813A

210D

209C

210C

210D

209C 21

0C

168A

168A

168A

168C

203B

168A

168A

168C

(Sch

emat

ic c

on

tin

ues

on

nex

t p

age.

)

46 Daikin IM 696-4


Figure 21: Condensing section control, RPS 135 (with reciprocating compressors), continued

(TD

3 C

LOSE

S FO

R5

SEC

ON

DS

AFT

ERB

EIN

G E

NER

GIZ

ED)

MP2

J

MP4

J

H85

0-7

H84

8-4

H85

3-4

H85

5-7

H85

0D

H85

6-10

H86

0-10

H86

0-11

H85

6-11

H85

3-9

H84

8-9

H84

9-8

H85

4-8

JPR

JPR

H85

0-12

H85

5-6

H85

5AH

855B

H85

0BH

850C

856A

856A

H85

5D

H84

7-3

H84

8-2

H86

4-5H

863-

6H

863-

1

H86

4-1

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

852

723

868

850

756

849

854

855

723

841

848

756

842

853

840

729

762

743

73385

7

727

760 86

5

850

855

855

850

869

2 M

IN

2 M

IN

CO

MPR

#2

BO

4

NO

CO

MB

O5

NO

CO

MB

O6

NO

CO

M

BO

8

NO

CO

M

BO

7

NO

CO

M

BO

9

NO

CO

M

(CO

MPR

#6)

BO

2

NO

CO

M

(CO

MPR

#4) B

O3

NO

CO

M

BO

1

NO

CO

M

(CO

MPR

#2)

DIS

AB

LEEN

AB

LE

DIS

AB

LEEN

AB

LE

B02B01

JUM

PERS

J10

J9

CO

MPR

.C

ON

TRO

LB

OA

RD

INPU

TSB

I=B

INA

RYA

I=A

NA

LOG

(JU

MPE

R LO

CAT

EDJU

ST U

ND

ERC

OM

M. C

ARD

)N2

BU

S

12

6

A1

A2

A1

A2 8

7A1

A2

A1

A2

2222222 2222222

7 7

A1

A2

A1

A2

87A1

A2

A1

A2

87

21

21

1011

1011

35

21

21

3

12

42

31

94 12

0T2

120

T2

9

42

8

12(3

2)11

(31)

1522

21

12(3

2)11

(31)

44

21

21

41

ML

ML

48

422

21

8

42

31

43

49

22222222

15

1413

1413

21

35

43

21

GRD

1815131110

7

20

4

171612981965

213

CO

M2

BI6

BI5

BI4BI3

BI2

CO

M1

BI1

REF

N2-

N2+24

C

BI1

2

BI1

1

BI8

BI1

0

BI9

BI724

V

12

2

3

WH

T

BLK

DRN

5

1 1

61

2

12

PL26

+PP

PL28

+PP

M2

M4

R2M22

M21

PL26

+PP

PL28

+PP

M24

M23

R4M6

M8

R12

HTR

2+

NB

HTR

4+

NB

PL26

+PP

PL26

+PP

PL28

+PP

PL28

+PP

R4HP4

+N

B

HP2

+N

B

TD4

MP4

+N

BPL26

+PP

PL26

+PP

OP2

+N

B

OP4

+N

B

PL28

+PP

PL26

+PP

MM

P2

R12

M2

MM

P4

TB3

TD6

TD8

TB3

OP2

+N

B

OP4

+N

B

OP1

/8.1

6

OP3

/8.2

1

PL28

+PP

M4

PL28

+PP

MP2

+N

B

115V

AC

/8.4

7

115V

AC

/8.5

2

115V

AC

/8.4

8

115V

AC

/8.5

2

TB3 TB

3

U1_

2+

NB

PL26

M4

M2

PS2

R2

CS2

CC

B2

N_2

4/8.

06

LP2

+N

BPL

26+

PP

PL26

+PP

N2+

/8.0

9

N2-

/8.0

8

REF/

8.09

PL9

+PP

PL10

+PP

PL9

+PP

PL10

+PP

SV6

+N

B

SV2

+N

B

868A

867A

865B

865A

856A

656D

856B

856C

855A

855B

852A

851A

851B

851C

850A

850B

850C

850D

847B

826A

848A84

7A

845A

842A

841A

840A

838A

864A

805A

209C

210C

210D

168C 168C

168A

168A

168A

168A

(Sch

emat

ic c

on

tin

ues

on

pre

vio

us

pag

e.)

Daikin IM 696-4 47


Figure 22: Auxiliary VFD control/1

.68

/2.6

8/3

.11

/3.1

1

H42

5-12

H42

6-4

H42

6-6

H42

6-3

H42

9-10

H42

5-2

H42

6-1

H42

7-9

H43

1-7

H42

9-11

INV

ERTE

R

BY

PASS

INV

ERTE

R

BY

PASS

SOU

RCE

9-16

WIR

ED IN

TERN

AL

TO M

OTH

ERB

OA

RD

H41

3-7

H41

3-6

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

133

145

401

404

309

445

137

133

445

149

145

207

207

604

207

207

207

207

207

207

447

447

427

445

432

445

631

603

S4RE

TURN

AIR

SUPP

LYA

IR

I I I I

SRC

SUPP

LY F

AN

BO

1

24V

SRC

jprs

RETU

RN F

AN

BO

2

24V

SRC

jprs

24V

SRC

jprs

24V

SRC

jprs

SAF

INC

R

BO

14

RAF

INC

R

BO

16

HEA

T EN

AB

LE

BO

11

24V

SRC

jprs

24V

SRC

jprs

SAF

DEC

R

BO

13

RAF

DEC

R

BO

15

24V

SRC

jprs

2ND

2NC

1NO

1NC

2C

1C12

(32)

11(3

1)12

(32)

11(3

1)3

12

9

10

7

46

2 11

87

1

13

13

A2

A1

A2

A1

A2

A1

A2

A1

9-16

1NO

1

H1C

H1U

P

H1D

N

H1C

H1U

P

H1D

N

102

102

35

2NO

2

14N

O14

16N

O16

11N

O11

13N

O13

15N

O15

C3

C1

76

4542

S4

MM

P30

+B

BM

MP4

0+

BB

PL7

+PP

PL7

+PP PL

7+

PP PL8

+PP PL

8+

PP

PL8

+PP

PL7

+PP

PL7

+PP PL

8+

PP

R69

SIG

_1/6

.01

PL8

+PP

R67

R68

M30

I+

BB

M30

B+

BB

M40

I+

BB

M40

B+

BB

T1_N

T2_1

15V

AC

MC

B

MC

B

R46_

47

R48_

49

R67

R68

R25

MC

B

MC

B

MC

B

MC

B

MC

B

MC

B

R20

+G

B

PL18

+PP

PL18

+PP

TB2

TB2

T3_2

4VT3

_CO

M

431A

431B

429A

427A

427B

426A

426B

425A

413A

411A

409A

407A

405A

404A

401A

168C

203B

303A

303B

(Sch

emat

ic c

on

tin

ues

on

nex

t p

age.

)

48 Daikin IM 696-4


Figure 22:

H443-4

H443-1

H443-7

H44

3-14

H44

3A

H443-5

H443-2

H443-12

H44

3-15

H44

3C

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

401

239

425

405

137

261

404

241

430

409

149

264

DEC

RIN

CR

SAF

AB

B40

1

DEC

RIN

CR

RAF

AB

B40

1

76

4

1

35

1413

7

14

H2D

NH

2VH

2UP

149

1216

108

1113

76

5

2

35

12

1413

15

H2D

NH

2VH

2UP

149

1216

108

1113

R67

PL7+PP

PL7+PP

R61

M30

I+

BB

PL7+PP

PL7

+PP

R46_

47

AFD

10+

NB

R68

PL8+PP

PL8+PP

R66

PL8+PP

M40

I+

BB

PL8

+PP

R48_

49

AFD

20+

NB

443C

443A

443D

445A

445B

443G

443E

443H

445C

445D

(Sch

emat

ic c

on

tin

ues

on

pre

vio

us

pag

e.)

Auxiliary VFD control

Daikin IM 696-4 49


Figure 23: Modulating gas heat control (standard mod)

/1.6

8

H63

4-8

H63

3-9

H63

2-9

NO

TE:

1.PO

WER

, PIL

OT

& M

AIN

VA

LVE

IND

ICA

TIO

NLI

GH

TS A

RE P

ART

OF

THE

FLA

MES

AFE

GU

ARD

(FSG

) CO

NTR

OLL

ER.

BLA

CK

WH

ITE

BLA

CK

WH

ITE

IGN

ITIO

N T

RAN

SFO

RMER

BLA

CK

BLA

CK

BLA

CK

BLA

CK

H60

4-3

H604-5

H61

0-1

H60

2-2

H60

3-1

H60

3-4

H60

3-2

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

207

207

625

632

413

225

402

24V

SRC

jprs

BO

10

24V

SRC

jprs

BO

9

GTYC

OM

CLO

SE

OPE

N

MO

DU

LATI

NG

GA

S &

AIR

VA

LVE

AC

TUA

TOR

(FLO

ATI

NG

)

CC

W(C

L)

CW

(OP)

FSG

-G

FSG

-F

(FLA

ME

ROD

)

FD

MIC

ROC

OM

PUTE

R

5K1

2K1

1K1

(L1)

6K1

3K1

4K1

2K2

FLA

ME

AM

PLI

FIER

T I M E R

FSG

(FLA

ME

SAFE

GU

ARD

)(P

LUG

-IN

TY

PEC

ON

TRO

LLER

)

6000

VX

1X

2

115V

BLK

BLK

9 9 810

NO

10

9NO

9

5

64

11 12

RED

_G63

0-B

WH

T_G

630-

W

YEL

_G63

2-R

YEL

_G63

3-1

YEL

_G63

4-2

21RWH

TB

LK

C2

C1

CO

MN

O

21212121212121

BLK

BLK

BLK

WH

T

BLK

WH

T

107

6

98

L2

345

L2L1

2

6

3

5

4

NB

RED

_G61

7-L

20 202020202020

WH

T_G

617-

R

87

1

L4L3

L2L1

5

31

11482

10

571

38

7

1

2

21

42

8 9

10

NB

RED

_G60

9-L

WH

T_G

609-

R

RED

_G60

3-L3

RED

_G60

2-L2

RED

_G60

2-L1

RED

_G60

2-L1

1

PL19

+PP

PL18

+PP PL

18+

PPM

CB

+M

B

MC

B+

MB

R23

TB11

TB11

VM

I

R23

AS

GV

1

GV

2

GV

3

FSG

IT

TB11

TB11

TB11

TB11

TB11

TB11

R24

+M

BPL

19+

PP

FLC

PL19

+PP

R20

S3

PL19

+PP

R25

+M

B

S1/2

.01 PL

16+

PP

PL19

+PP

SIG

_1/4

.28

HL2

2

BM

T1_N

PL19

+PP

PL16

+PP

TB11

TB11

TB11

TB11

634B

633C

633B

632B

621B

621C

617A

613A

611A

610A

610B

607A

604A

604B

603A

603B

603C

602A

201A

426B

168C

(Sch

emat

ic c

on

tin

ues

on

th

e n

ext

pag

e.)

8

624

609

619

618

50 Daikin IM 696-4


Figure 23: Modulating gas heat control (standard mod)

PRES

S. R

EG.

PRES

S. R

EG.

AIR

SWIT

CH

AIR

SWIT

CH

CO

NN

.TE

ST

CO

CK

TEST

CO

NN

.TE

ST

CO

CK

TEST

MA

IN G

AS

VA

LVES

GV

3

PILO

T V

ALV

EMA

IN G

AS

VA

LVES

GV

3

PILO

T V

ALV

E

BLO

WER

BU

RNER

BLO

WER

BU

RNER

GV

1

CO

NN

.TE

ST

GV

1

GV

2G

V2

PIPI

NG

DIA

GRA

MPI

PIN

G D

IAG

RAM

PILO

T

REG

.

MA

INPR

ESS.

PILO

T

REG

.

MA

INPR

ESS.

CO

CK

CO

CK

CO

NN

.TE

ST

OV

ER 1

/2 P

.S.I.

HIG

H P

RESS

.(TH

RU 1

/2 P

.S.I.

)

OV

ER 1

/2 P

.S.I.

HIG

H P

RESS

.(TH

RU 1

/2 P

.S.I.

)

REG

.RE

G.

SHU

TOFF

SHU

TOFF

CO

CK

CO

CK

SHU

TOFF

SHU

TOFF

CO

CK

AIR

CO

CK

VA

LVE

GA

SM

OD

.

DA

MPE

RA

IR

VA

LVE

GA

SM

OD

.

DA

MPE

R

UPO

N D

ETEC

TIO

N O

F PI

LOT

FLA

ME,

TER

MIN

AL

#10

(IGN

ITIO

N T

RAN

SFO

RMER

--IT

) WIL

L B

E D

E-EN

ERG

IZED

AN

D T

ERM

INA

L #9

(MA

IN G

AS

VA

LVES

--G

V2

& G

V3)

THE

BU

RNER

CO

MB

UST

ION

AIR

BLO

WER

MO

TOR

(BM

). W

HEN

EVER

PO

WER

IS R

ESTO

RED

TO

TH

E FL

AM

E SA

FEG

UA

RD, T

HE

FLA

ME

SAFE

GU

ARD

WIL

L G

O T

HRO

UG

H A

10

SEC

ON

D

CO

NTR

OL

(FLC

) AN

D T

ERM

INA

L #6

ON

TH

E FL

AM

E SA

FEQ

UA

RD (F

SG) I

S PO

WER

ED. T

HE

FLA

ME

SAFE

GU

ARD

TH

EN E

NER

GIZ

ES IT

S TE

RMIN

AL

#4, W

HIC

H P

OW

ERS

(BO

#9) O

R (B

O#1

0) O

N T

HE

MA

IN C

ON

TRO

L B

OA

RD (M

CB

) ARE

CLO

SED

TH

E A

CTU

ATO

R W

ILL

REM

AIN

AT

ITS

PRES

ENT

POSI

TIO

N.

TH

E H

EATI

NG

CA

PAC

ITY

IS M

ON

ITO

RED

BY

TH

E

POSI

TIO

N.

WH

EN T

HE

MA

IN C

ON

TRO

L SY

STEM

CLO

SES

(BO

#9) O

N T

HE

MA

IN C

TRL

BRD

.(MC

B),

THE

AC

TUA

TOR

WIL

L RE

POSI

TIO

N T

OW

ARD

A L

OW

ER F

IRIN

G R

ATE

. IF

NEI

THER

MA

IN C

TRL

BRD

.(MC

B),

THE

GA

S V

ALV

E A

CTU

ATO

R W

ILL

REPO

SITI

ON

TO

WA

RD A

HIG

HER

FIR

ING

RA

TE U

NTI

L EI

THER

(BO

#10)

OPE

NS

OR

THE

AC

TUA

TOR

REA

CH

ES IT

S M

AX

IMU

M

GA

S V

ALV

E A

ND

CO

MB

UST

ION

AIR

DA

MPE

R A

ND

CA

N S

ET T

HE

FIRI

NG

RA

TE B

ETW

EEN

33%

AN

D 1

00%

OF

NO

RMA

L RA

TE.

WH

EN T

HE

MA

IN C

ON

TRO

L SY

STEM

CLO

SES

(BO

#10)

ON

TH

E

WH

ENEV

ER T

HE

BU

RNER

IS IN

OPE

RATI

ON

ITS

FIRI

NG

RA

TE W

ILL

BE

DET

ERM

INED

BY

TH

E "F

LOA

TIN

G"

GA

S V

ALV

E A

CTU

ATO

R (V

M1)

. TH

IS A

CTU

ATO

R PO

SITI

ON

S TH

E B

UTT

ERFL

Y

MA

IN C

ON

TRO

L B

OA

RD (M

CB

) TH

ROU

GH

(AI#

10) V

IA A

PO

SITI

ON

FEE

DB

AC

K P

OTE

NTI

OM

ETER

ON

TH

E A

CTU

ATO

R (V

M1)

.

SAFE

GU

ARD

(FSG

). U

PON

A C

ALL

FO

R H

EAT,

TH

E C

ON

TRO

L SY

STEM

WIL

L C

LOSE

(BO

#11)

ON

TH

E M

AIN

CTR

L B

RD (M

CB

), TH

US

ENER

GIZ

ING

REL

AY

(R20

).

WH

EN T

HE

ROO

FTO

P U

NIT

IS E

NER

GIZ

ED 1

20 V

OLT

PO

WER

IS S

UPP

LIED

TO

TH

E SY

STEM

ON

-OFF

SW

ITC

H (S

1), T

O B

URN

ER O

N-O

FF S

WIT

CH

(S3)

AN

D 2

4 V

OLT

S TO

TH

E (B

O#1

1)

POW

ER IS

FU

RNIS

HED

TH

ROU

GH

TH

E SY

STEM

ON

-OFF

SW

ITC

H (S

1), T

HRO

UG

H T

HE

BU

RNER

ON

-OFF

SW

ITC

H (S

3), T

HRO

UG

H R

ELA

Y (R

20) C

ON

TAC

TS, T

HRO

UG

H T

HE

HIG

H L

IMIT

CO

NTA

CTS

ON

TH

E M

AIN

CTR

L B

RD (M

CB

). B

URN

ER O

N-O

FF S

WIT

CH

(S3)

WIL

L PO

WER

TH

E M

OD

ULA

TIN

G G

AS

VA

LVE

AC

TUA

TOR

(VM

1) A

ND

TER

MIN

AL

#5(L

1) O

N T

HE

FLA

ME

DE-

ENER

GIZ

ED, T

HU

S D

E-EN

ERG

IZIN

G T

HE

BU

RNER

. TH

E FL

AM

E SA

FEG

UA

RD W

OU

LD T

HEN

BE

ON

SA

FETY

LO

CK

OU

T A

ND

WO

ULD

REQ

UIR

E M

AN

UA

L RE

SETT

ING

. TH

E H

EAT

ALA

RM

ALS

O, T

HE

FLA

ME

SAFE

GU

ARD

CO

NTA

INS

"LED

'S"

(LO

WER

LEF

T C

ORN

ER) T

HA

T W

ILL

GLO

W T

O IN

DIC

ATE

OPE

RATI

ON

.

BLO

WER

OPE

RATI

ON

IS S

ENSE

D B

Y T

HE

AIR

SW

ITC

H (A

S), W

HIC

H M

AK

ES T

ERM

INA

L #6

TO

#7.

AFT

ER A

90

SEC

ON

D P

REPU

RGE

PERI

OD

, TER

MIN

AL

#8 (F

IRST

GA

S V

ALV

E

THE

RELA

Y D

RIV

ES T

HE

GA

S V

ALV

E A

CTU

ATO

R (V

M1)

TO

TH

E M

INIM

UM

FIR

ING

RA

TE P

OSI

TIO

N W

HEN

EVER

TH

E FL

AM

E IS

NO

T

RELA

Y (R

24) W

OU

LD T

HEN

BE

ENER

GIZ

ED A

ND

WO

ULD

TH

EN E

NER

GIZ

E TH

E RE

MO

TE "

HEA

T FA

IL"

IND

ICA

TOR

LIG

HT

AN

D S

END

A F

AIL

SIG

NA

L TO

BIN

ARY

INPU

T #5

ON

TH

E

IN T

HE

EVEN

T TH

E PI

LOT

FAIL

S TO

IGN

ITE

OR

THE

FLA

ME

SAFE

GU

ARD

FA

ILS

TO D

ETEC

T IT

S FL

AM

E W

ITH

IN 1

0 SE

CO

ND

S, T

ERM

INA

LS #

4, 8

, 9, A

ND

10

WIL

L B

E

IF T

HE

UN

IT O

VER

HEA

TS, T

HE

HIG

H L

IMIT

CO

NTR

OL

(FLC

) WIL

L C

YC

LE T

HE

BU

RNER

, LIM

ITIN

G F

URN

AC

E TE

MPE

RATU

RE T

O T

HE

LIM

IT C

ON

TRO

L SE

T PO

INT.

INIT

IATI

ON

PER

IOD

BEF

ORE

TH

E PR

EPU

RGE

PERI

OD

WIL

L B

EGIN

.

MIC

ROTE

CH

II M

AIN

CO

NTR

OL

BO

ARD

(MC

B).

WIL

L B

E EN

ERG

IZED

AN

D T

HE

MA

IN F

LAM

E W

ILL

CO

ME

ON

.

THE

FLA

ME

ROD

(FD

).

(PIL

OT)

--G

V1)

AN

D T

ERM

INA

L #1

0 (IG

NIT

ION

TRA

NSF

ORM

ER--

IT) W

ILL

BE

ENER

GIZ

ED.

ON

, AN

D H

OLD

S IT

TH

ERE

UN

TIL

THE

FLA

ME

HA

S LI

T A

ND

BEE

N P

ROV

EN.

LOW

FIR

E ST

ART

IS P

ROV

IDED

BY

REL

AY

(R23

).

SEQ

UEN

CE

OF

OPE

RATI

ON

THE

PILO

T FL

AM

E W

ILL

IGN

ITE

AN

D B

E D

ETEC

TED

BY

TH

E FL

AM

E SA

FEG

UA

RD T

HRO

UG

H

WH

EN 1

20 V

OLT

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

(Sch

emat

ic c

on

tin

ues

on

th

e p

revi

ou

s p

age.

)

, continued

Daikin IM 696-4 51


Figure 24: Multistage electric heat control (4 stage)

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

(Sch

emat

ic c

ontin

ues

on n

ext p

age.

)

500

546

552

500

548

500

547

500

500

550

556

500

500

553

500

554

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

(MA

NU

AL)

L3B

L3A

L2B

L2A

L1B

L1A

L3-1

L2-1

L1-1

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3

L2

L1 L3

L2

L1

L3

L2

L1

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3-7

L2-7

L1-7

43

21

L3

L2

L1

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3-6

L2-6

L1-6

43

21

L3

L2

L1

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3-5

L2-5

L1-5

43

21

L3

L2

L1

43

21

43

21

L3

L2

L1

L3-2

L2-2

L1-2

T3T2T1

L3L2L1

L3L2L1

T3T2T1

43

21

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3-8

L2-8

L1-8

L3-3

L2-3

L1-3

T3T2T1

L3L2L1

L3L2L1

T3T2T1

L3-4

L2-4

L1-4

T3T2T1

L3L2L1

L3L2L1

T3T2T1

43

21

43

21

L3

L2

L1

PB3

PB3

M31

FB31

HTR

1A

HTR

3AH

TR3B

M43

FB43

PB3

HL1

2

HTR

2B

M42

FB42

PB3

HL1

1

HTR

1B

M41

FB41

PB3

HL4

HTR

4A

HL3

HL2

HTR

2A

PB3

M32

FB32

HL1

M44

FB44

PB3

PB3

M33

FB33

PB3

M34

FB34

HL1

4

HL1

3

HTR

4B

508A

508B

508C

507C

507D

506C

506D

516D

516E

516F

515E

515F

514E

514F

511G

510G

512D

512E

512F

511E

511F

511H

510E

510F

510H

507G

506G

508D

508E

508F

507E

507F

507H

506E

506F

506H

512B

512C

511C

511D

510C

510D

507B

506B

510A

511A

512A

510B

511B

506A

507A

520D

520E

520F

519E

519F

518E

518F

516B

516C

515C

515D

514C

514D

514A

515A

516A

514B

515B

520B

520C

519C

519D

518C

518D

518A

519A

520A

518B

519B

519G

518G

515G

514G

52 Daikin IM 696-4


Figure 24: Multistage electric heat control (4 stage)

(Sch

emat

ic c

ontin

ues

on p

revi

ous

page

.)

HEA

TER

BA

NK

"A

" M31

1 A

M32

2 A

M33

3 A

120

KW

HEA

TER

BA

NK

"B

" M41

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, continued

Daikin IM 696-4 53


Figure 25: Energy recovery wheel control

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54 Daikin IM 696-4


Figure 25: Energy recovery wheel control

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Daikin IM 696-4 55


Figure 25:

(OPEN OUTPUT)

(OPEN OUTPUT)

(OPEN OUTPUT)

(OPEN OUTPUT)

(OPEN OUTPUT)

(OPEN OUTPUT)

TO COOLING STAGE #4

TO COOLING STAGE #3

TO COOLING STAGE #2

TO COOLING STAGE #1

277V, 5A RESISTIVE

120V, 1/10HP, 3FLA, 18LRA, 100VA PILOT DUTY

240V, 1/4HP, 2.9FLA, 17.4LRA, 250VA PILOT DUTY

277V, 1/3HP, 2.98FLA, 17.88LRA, 300VA PILOT DUTY

BINARY OUTPUT ELEC. RATINGS

JUMPERS

ENABLE DISABLEBO1

ENABLE DISABLEBO2

(JUMPER LOCATEDJUST UNDERCOMM CARD)

1.3K OHM, 2W

801

802

803

804

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806

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56 Daikin IM 696-4


Figure 26: Constant volume fan control (SAF and RAF)

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Light and receptacle power

Daikin IM 696-4 57

Test Procedures

Test Procedures

CAUTION

When troubleshooting the various MicroTech II components, it may be necessary to remove power to the controller by opening system switch S1 in the main control panel. Before doing this, pump down the compressors. To do this, open pumpdown switches PS1 and PS2.

The “Parts List” section at the end of this manual includes a listing of MicroTech II related part numbers.

Troubleshooting Main Control Board (MCB)MCB Battery

Standby power is provided by a 3 VDC lithium battery, which maintains the MCB Static Random Access Memory (SRAM) and the Real Time Clock (RTC) while power is removed from the MCB.

The battery degrades with time depending on load, temperature, and the percentage of time the MCB does not have power. With an operating temperature under 25ºC, battery life expectancy is as follows:

Battery usage Typical life Minimum life

1% 10 years 5 years10% 10 years 5 years

100% 1 year 0.3 years

A battery test is performed each time the MCB power-up diagnostics are executed. The minimum voltage needed to sustain the SRAM and RTC is 2.0 VDC. A warning occurs when the battery voltage drops below approximately 2.5 VDC, which is indicated by the red MCB Error LED blinking after the Main Control Board Power-Up Sequence described below is completed. This warning signals that the battery is reaching the end of its useful life and should be replaced. Once a battery warning alarm occurs, replace the battery within 14 days to avoid complete battery failure and memory loss. Regardless of the battery status, the MCB board continues execution of the on-board program.

Note – After battery replacement, the Error LED does not revert to the normal off condition until one of the following occurs:

• Power is cycled to MCB• The battery is tested at two minutes after midnight each

day. If battery is normal then, the Error LED reverts tonormal

MCB Data Archiving

All the MCB control parameters and the real time clock settings are backed up by the MCB using the SRAM. The

SRAM is maintained by the MCB battery when power is removed from the MCB. To avoid losing the information stored on the board if battery failure occurs, the MCB performs a data archiving function once a day, just after midnight. At this time, all the MCB control parameter settings are archived to a file stored in the MCB FLASH memory.

If the MCB is powered up with a low or defective battery (or no battery), the most recently archived data is restored to the controller.

Note – When this archived data restoration process occurs, it increases the controller startup and initialization period by approximately 75 seconds.

MCB “Cold” Reboot

Whenever troubleshooting of the MCB leads to the conclusion that the MCB is defective, perform a cold reboot before replacing it. A cold reboot consists of removing the MCB battery and cycling power to the controller.

MCB LED Power-Up Sequence

The various LEDs on the MCB are shown in Figure 28. When power is applied to the MCB, the LEDs execute a specific startup sequence, consisting of the following three main components:• The LED Operational Check period• The MCB Error Code Display period• The MCB Initialization period

LED Operational Check Period. When power is applied to the MCB or when the MCB is reset, an operational test of the 16 Binary Input LEDs in the upper left corner and the four miscellaneous status LEDs at the bottom of the MCB is performed. This provides a visual check of the operational status of the LEDs. The following LED sequence should occur: 1 All 16 of the Binary Input LEDs and all the miscellaneous

LEDs (3 green and 1 red) across the bottom of the MCB, turn ON for approximately 1–3 seconds and then turn OFF.

2 The miscellaneous LEDs across the bottom of the MCB sequence ON for one half second and then OFF from left to right (RS-485 Bus Port Activity, RS-232 Port Activity, IP Port Activity, and MCB Error).

3 Binary Input LEDs BI-1 through BI-8 are turned ON for one half second and then turned OFF.

4 Binary Input LEDs BI-9 through BI-16 are turned ON for one half second and then turned OFF.

If any of these LEDs fail to light as described, replace the MCB to correct the problem.

Note – Binary Outputs are not tested and remain off during the LED Operational Check period.

Compressor pumpdown is required before removing power to the controller or unit damage could occur.

Table 23: Battery life expectancy

58 Daikin IM 696-4

Test Procedures

Figure 28: Main control board

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MCB Error Code Display Period. After the LED Operational Check period is complete, if any MCB startup errors are detected, an error code displays. For details regarding the various LED error codes, refer to “MCB LED Startup Error Codes” below.

If no startup errors are detected, all LEDs remain OFF and the MCB Initialization period occurs as described below.

MCB Initialization Period. When the MCB Error Code Display period is complete, MCB Initialization begins. This period consists of the following LED sequence:1 All the LEDs remain OFF for approximately 15–20

seconds (with a normal battery). If the battery is low or defective, this period lasts approximately 90 seconds during which previously archived control parameter data is restored to the controller. Refer to “Main Control Board (MCB) Data Archiving” on page 33.

2 The RS-485 Bus Port Activity Indication LED in the lower left corner of MCB begins blinking indicating activity on the RS-485 bus port, and after an approximate 1–2 second delay, the Binary Input LEDs turn ON according to the Binary Input switch conditions.

3 After a 15–20 second pause, the Binary Output LEDs on the right side of the board turn ON, according to the control program logic, and the startup sequence is complete.

Note – The elapsed time for the entire startup sequence, including the LED Operational Check, the MCB Error Code Display, and the MCB Initialization period is approximately 45 to 120 seconds depending on the network configuration and the MCB battery condition.

Daikin IM 696-4 59

Test Procedures

MCB LED Startup Error Codes

The 16 green Binary Input LEDs in the upper left corner and miscellaneous LEDs on the bottom (3 green and 1 red) of the MCB (Refer to Figure 28 on page 59) can be used to diagnose problems with the MCB.

During the MCB Error Code Display period, MCB failures are indicated by the red MCB Error LED on the bottom right side turning ON or BLINKING along with one other LED turning ON according to Table 24 on page 60. If multiple error conditions exist, each error code appears in succession, lasting approximately 3 seconds each, and then turn OFF. Non-catastrophic errors are indicated during the MCB Error Code Display period with the red MCB Error LED remaining on continuously.

All non-catastrophic errors are logged in RAM to be retrieved by the MCB operating system. Catastrophic errors are indicated during the MCB Error Code Display period with the

red MCB Error LED flashing at a rate of approximately 5.9 Hz. When the MCB Error Code Display period is complete, the startup sequence continues.

The following diagnostic tests are run during the startup sequence:• Battery Test• Flash CRC (Cyclic Redundancy Check) Test• SRAM (Static RAM) Test• Communication Port Tests• IP Register Test

The following sections provide a brief description of each of these startup tests and recommended steps to correct the problem.

LED

Startup errors

BatteryFlashCRC

startup

Flash CRCmain/boot

FlashCRC

config.

RAMlowbyte

RAMhighbyte

RS 485busport

RS 232port

BACnet MS/TP or LONMARK

port (optional)

I/Oexpansion

port

IPport

Table 24: Main control board LED startup error codes

RS-485 bus port ONRS-232 port ON

IP port ONMCB error ON Blinking Blinking Blinking Blinking Blinking ON ON ON ON ON

BI-1 ONBI-2 ONBI-3 ONBI-4 ONBI-5 ONBI-6 ONBI-7 ONBI-8 ON

60 Daikin IM 696-4

Test Procedures

Battery Test

The battery test determines the status of the MCB battery. When the battery fails the test, the error is indicated by the red MCB Error LED and the Binary Input BI-1 LED turning ON during the MCB Error Code Display period. This warning signals the battery is nearing the end of its useful life and should be replaced. Regardless of the battery status, the MCB board continues execution of the on-board program. Once the Main Control Board LED Power-Up Sequence is complete, if the battery is bad, the red Error LED blinks on and off at a rate of one second on and one second off. If the battery is good it remains off.

Note – After battery replacement, the Error LED will not revert to the normal off condition until one of the following occurs:

• Power is cycled to MCB• The battery is tested at two minutes after midnight each

day. If battery is normal then, the Error LED reverts tonormal.

Flash CRC Tests

The startup Flash memory test consists of a sector by sector CRC check of the following Flash code bases:• Startup• Boot• Main• Two Flash data bases: Dictionary and Configuration.

The results of all five tests are saved in SRAM for use by the operating system. A Dictionary failure does not result in a startup error display. The following scenarios describe the possible failure modes of the flash CRC tests.

Bad CRC in Startup Code Base. After displaying the Startup Flash CRC error during the MCB Error Code Display period, the startup process continues, if possible. Since the startup code validity is questionable, correct operation from this point is unpredictable. Daikin recommends downloading the startup code again. If this is not possible or ineffective, replace the MCB.

Bad CRC in Main Code Base and Boot Code Base. After displaying the Main/Boot Flash CRC error during the MCB Error Code Display period, the startup process continues. After the startup sequence is completed, execution is passed to the Boot code. Since the Boot code validity is questionable, correct operation after entering Boot code is unpredictable. A CRC failure in only the Boot or only the Main code base will not result in an error display. Re-downloading the Main and Boot code is recommended.

Bad CRC in Configuration Data Base. This is a fatal error that requires replacing the MCB. The configuration database contains user and factory defined configuration parameters including the device name, communication parameters, and I/O setup and calibration data. After displaying the Configuration Flash CRC error during the MCB Error Code Display period, the startup process continues. If main code is

run, the MCB reboots, resulting in continuously repeating the error code and reboot cycle. If boot code is run, MCB will run with factory default values.

SRAM Test

Simply stated, the SRAM test checks each memory location by writing values to each location, reading the value back and comparing the read back value to the expected value. If a SRAM error is detected in the low byte, the RAM Low Byte failure displays during the MCB Error Code Display period. The MCB then is reset by an external “watchdog” circuit and the Main Control Board LED Power-Up Sequence begins again. If a SRAM failure is detected in the high byte, the RAM High Byte failure displays and the Serial Bus Port LED turns ON during the MCB Error Code Display period. The MCB then is reset by an external “watchdog” circuit and the Main Control Board LED Power-Up Sequence begins again. If either the RAM Low Byte or the RAM High Byte error occurs, replace the MCB.

Communication Port Tests

The various communication ports on the MCB are tested during the Main Control Board LED Power-Up Sequence. This feature allows the processor to verify the internal transmit and receive data paths of MCB data communication channels. Once in the test mode, proper operation of the various communication channels is verified by writing data to the corresponding transmit buffer of the channel under test and then reading the data back from the receive register. If read data does not match write data, the MCB displays the appropriate communication port error during the MCB Error Code Display period and then continues startup and initialization. If any of the possible communication port errors occur, replace the MCB.

IP Register Test

After determining the existence of an optional IP communication module, the MCB performs a series of read/write tests on critical registers of the IP processor. If any of the register tests fail, an IP port failure displays during the MCB Error Code Display period and then the MCB continues running startup and initialization. If the IP port error occurs, replace the IP communication module. If the problem persists after replacing the IP communication module, it is likely the MCB is defective. Refer also to the literature shipped with the IP communication module.

Daikin IM 696-4 61

Test Procedures

Troubleshooting Auxiliary Control Boards (CCB1, CCB2, GCB1, EHB1 and ERB1)This section outlines basic functional checks of the auxiliary control boards that might be connected to the MCB via the RS-485 communication bus interface.

Hardware Check

1 Verify the auxiliary control board has been wired and terminated properly. Refer to the as-built unit wiring schematics or refer to Figure 16 on page 38 (DAC units) or Figure 17 on page 41 (SCC units).

2 Verify the RS-485 Communications module on the auxiliary control board is properly installed. Verify the address switches on the RS-485 Communication module are set to the correct address.

Note – Address switches may “appear” to be set correctly but actually may not be “seated” well. If there is a communication problem between the main control board and an auxiliary control board, try toggling the switches up and down a couple of times, reset them to the correct setting, and cycle power to the auxiliary control board. Refer to Table 4 on page 9.

3 Verify that 24 VAC power is available (CS1 or CS2 switch ON on as applicable) and properly terminated on the J1 terminal block on the auxiliary control board.

RS-485 Communication Card Status LEDs

A set of two status LEDs is located in the lower right area of the RS-485 Communication Card mounted on the auxiliary control boards (refer to Figure 7 on page 11). These LEDs provide useful trouble shooting information. The upper LED verifies that the MCB is transmitting data to the auxiliary control board. The lower LED verifies that the auxiliary control board is transmitting data to the MCB.1 The upper LED should always blink at the same rate as the

RS-485 Activity LED on the MCB (refer to Figure 30). If it is not blinking and the RS-485 Activity LED on the MCB is blinking, verify the wiring between the MCB and auxiliary board is free of defects. If the RS-485 Activity LED on the MCB is not blinking, it is likely the problem is with the MCB.

2 The lower LED should always be blinking. If it is not, perform the hardware checks listed above. If these check out correctly and the problem persists, cycle power to the entire controls system using the system S1 switch. If the problem persists, either the MCB has not been downloaded and configured correctly or the auxiliary control board or it is likely its RS-485 communication card is defective. Use the following procedure to isolate the problem component:a Verify that the MCB download and configuration has

been performed correctly and then cycle power to the entire control system using the S1 system switch. If this has been done and the problem persists, proceed to Step b below.

b Remove power from the control system and replace the RS-485 communication card on the suspect auxiliary control board with a properly functioning card. Do this by exchanging the RS-485 communication card with one of the other auxiliary control boards on the unit. If this is done, make sure to change the addresses switches on the RS-485 communication cards according to Table 4 on page 12. Apply power to the control system and check operation. If the problem follows the suspect communication card, the card is defective. If the problem remains with the suspect auxiliary control board, it is likely the auxiliary control board is defective.

Troubleshooting Keypad/Display Keypad/Display Power Up Initialization

When the keypad/display is connected to the MCB and power is applied, the firmware in the keypad/display runs a diagnostic test of its static RAM (SRAM) and also checks the micro controller ROM for proper checksum. After these tests are completed, the keypad/display responds to a poll of its address by the MCB with an acknowledge message to the MCB. This causes the controller to start downloading display information to the keypad/display. The keypad is locked out until the tests and the download is complete.

Note – The keypad/display address is defined by a four-position dip switch block on the right side of the device. For this application, all four of these switches should be in the UP position, which defines address 32.

When the keypad/display is connected to the MCB and power is applied, the backlight and the red Alarm LED on the display are turned on. The backlight remains on until it times out (15 minutes after a key press or after power up). During the next 5 seconds, the LCD counts down from 9 to 0 in all 80 character locations. After the countdown is complete, the Alarm LED turns off and the display appears as follows:

Version xxx

Addressyy

Statuszz zzzz

Startupaaaa bbbb ccc

Where:

xxx = The version of firmware in the keypad/display

yy = The keypad/display address 32

zzzz = OK normally or NO COMM if the MCB is not communicating with the keypad/display

aaaa = OK normally or IRAM if internal RAM test failed

bbbb = OK normally or XRAM if external RAM test failed

ccc = OK normally or ROM if ROM checksum does not match stored checksum

62 Daikin IM 696-4

Test Procedures

When the MCB finishes downloading to the keypad/display it sends a “download complete” message to the keypad/display. When this message is received, the LCD shows the “main” rooftop application menu screen.

Note – A NO COMM indication on the Status line during the initialization period does not necessarily indicate a problem. A communication problem is indicated if the LCD “hangs,” i.e., it does not proceed to show the “main” rooftop application menu screen.

If aaaa= IRAM, bbbb= XRAM and/or ccc= ROM, replace the keypad/display.

Note – The keypad/display can be connected to the MCB while power is on. The normal elapsed time for the “main” rooftop menu screen to appear in the LCD upon initializing is approximately 60 seconds.

Troubleshooting Temperature SensorsThe MicroTech II temperature sensor consists of a positive temperature coefficient (PTC) silicon sensing element. The resistance of this sensor increases with increasing temperature. The element has a reference resistance of 1035 ohms at 77°F (25°C). Each element is calibrated according to the graphs shown in Figure 29 (°F) and Figure 30 on page 64 (°C). Tabulated resistance vs. temperature data is shown in Table 25.

Use the following procedure to troubleshoot a suspect sensor.1 Disconnect the sensor from the MCB.2 Take a temperature reading at the sensor location. Be sure

to allow the thermometer to stabilize before taking the reading.

3 Use the temperature reading from Step 2 to determine the expected sensor resistance from Table 25.

4 Using an ohmmeter, measure the actual resistance across the two sensor leads.

5 Compare the expected resistance to the actual resistance.6 If the actual resistance value deviates substantially (more

than 10%) from the expected resistance found in Table 25, replace the sensor.

Temperature °F (°C) Resistance in ohms

Table 25: MicroTech II temperature sensor—temperature vs. resistance chart

-40 (-40) 613-31 (-35) 640-22 (-30) 668-13 (-25) 697-4 (-20) 7275 (-15) 75814 (-10) 78923 (-5) 82232 (0) 85541 (5) 88950 (10) 92459 (15) 96068 (20) 99777 (25) 103586 (30) 107495 (35) 1113

104 (40) 1153113 (45) 1195122 (50) 1237131(55) 1279140 (60) 1323149 (65) 1368158 (70) 1413167 (75) 1459176 (80) 1506185 (85) 1554194 (90) 1602203 (95) 1652212 (100) 1702221(105) 1753230(110) 1804239 (115) 1856248 (120) 1908

Daikin IM 696-4 63

Test Procedures

Figure 29. MicroTech II temperature sensor—temperature (°F) vs. resistance graph

500 700 900 1100 1300 1500 1700 1900-40

0

40

80

120

160

200

240

280

Resistance (Ohms)

Tem

pera

ture

(°F)

Figure 30. MicroTech II temperature sensor—temperature (°C) vs. resistance graph

500 700 900 1100 1300 1500 1700 1900

Resistance (Ohms)

-40

-20

0

20

40

60

80

100

120

140

Tem

pera

ture

(°C

)

Troubleshooting Communications ModulesBACnet/IP Module

For a detailed description and troubleshooting information regarding the BACnet/IP communications module, refer to installation and maintenance bulletin IM 703, MicroTech II Applied Rooftop Unit Controller and Self-Contained Unit Controller BACnet Communications Module—BACnet/IP. For details regarding BACnet protocol data, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

BACnet MS/TP Module

For a detailed description and troubleshooting information regarding the BACnet MS/TP communications module, refer to installation and maintenance bulletin IM 704, MicroTech II Applied Rooftop Unit Controller and Self-Contained Unit Controller BACnet Communications Module—BACnet/MS/TP. For details regarding BACnet protocol data, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

LonMark Modules

For a detailed description and troubleshooting information regarding LonMark communications modules, refer to installation and maintenance bulletin IM 702, MicroTech II Applied Rooftop Unit Controller and Self-Contained Unit Controller LONWORKS Communications Module. For details regarding LONMARK protocol data, refer to engineering data document, ED 15060, MicroTech II Applied Rooftop Unit Controller Protocol Information.

64 Daikin IM 696-4

Troubleshooting Pressure TransducersUse the following procedure to troubleshoot a suspect sensor:1 If the duct static pressure always reads 0" WC on the unit

keypad/display and the discharge inlet vane position or VFD speed is continuously ramping to 100%, check the following:a If the unit has two duct static pressure sensors (SPS1

and SPS2), verify that they both function properly following Steps 2 through 5 below. Also check for faulty wiring connections at analog inputs MCB-AI13 and MCB-AI14. The controller displays and controls to the lower of the two readings. If a sensor is defective and inputs 0 volts to the controller, the static pressure reading on the keypad/display reads 0 and the controller attempts to increase the 0 value to set point by ramping the discharge inlet vanes or VFD up.

b If a second sensor (SPS2) is not installed or the pressure tubing to it is not connected, make sure the 2nd P Sensor= parameter in the Unit Configuration menu of the keypad/display is set to “None” so that the controller ignores the second static pressure analog input MCB-AI14.

c If a second sensor (SPS2) is installed, but it is a building space sensor rather than a duct static pressure sensor, make sure the 2nd P Sensor= parameter in the Unit Configuration menu of the keypad/display is set to “Bldg.”

2 Check the 24 VAC power supply to the sensor.a If the sensor is SPS1 or SPS2 (duct static), verify that

there is 24 VAC between the suspect transducer “+” and “-” terminals.

b If the sensor is SPS2 (building static), verify that there is 24 VAC between the “IN” and “CM2” terminals on the SPS2 terminal block.

c If 24 VAC supply reads low and/or the MCB is malfunctioning, the sensor may be drawing too much current. Disconnect the sensor and recheck the voltage and the MCB operation.

3 Using an accurate manometer or gauge, measure the same pressure that the suspect transducer is sensing. To do this, tap into the transducer high and low pressure tubing or locate the measurement device taps next to the transducer taps.

CAUTION

Note – If the suspect sensor is measuring duct static pressure, verify that the high and low pressure taps are properly installed. An improper pressure tap installation can cause severe fluctuations in the sensed pressure. Refer

to the model-specific installation manual for pressure tap installation guidelines (see Table 2 on page 1).

4 Measure the DC voltage output from the transducer.a If the sensor is SPS1 or SPS2 (duct static), measure the

voltage across the sensor “S” and “-” terminals. b If the sensor is SPS2 (building static), measure the

voltage across the “OT2” and “CM2” terminals on the SPS2 terminal block.

If the measured voltage and pressure do not match, there may be a wiring problem or the transducer may be defective. Check the transducer input circuit wiring and connections for defects.

If the measured voltage and pressure match, the MCB may be missconfigured or defective.

5 Remove power from the controller by opening system switch S1. If available, swap a similar good transducer with the suspect transducer or try installing a new transducer. Restore power by closing S1 and verify whether the suspect transducer is defective.

Figure 31. Duct static pressure transducer voltage vs. pressure

Static Pressure ("W.C.)1 2 3 4

Sen

sor O

utpu

t (V

DC

)

1

2

3

4

5

Figure 32. Building (space) static pressure transducer voltage vs. pressure

Static Pressure ("W.C.)

Sen

sor O

utpu

t (V

DC

)

1

2

3

4

5

-0.25 -0.125 0.000 0.125 0.25The fittings on the pressure transducers are fragile. Splice a tee fitting into each tap tube instead of removing each tap tube from its transducer fitting. Use an airtight cap to cover the test port after the pressure measurement.

65 Daikin IM 696-4

Parts List

Below is a partial list of applied rooftop unit replacement parts. Contact a local sales representative for additional information

Table 26: Component designation Description Daikin part number

MCB Main control board 060006101CCB1 Auxiliary cooling control board (DX Circuit #1 or generic condenser) 112026101

(replaces 106102701)CCB2 Auxiliary cooling control board (DX circuit #2) 112026101

(replaces 106102701)EHB1 Auxiliary electric heat control board 112026101

(replaces 106102701)ERB1 Auxiliary energy recovery control board 112026101

(replaces 106102801)– RS-485 communication module (for auxiliary control boards) 060006202– Standoffs for mounting RS-485 communication module (PN 060006202) onto auxiliary control board (PN

112026101)048166707

– Keypad/display 060006301– Keypad, main control board cable 111044601

ZNT1 Zone temperature sensor with tenant override 111048101Zone temperature sensor with tenant override & remote setpoint adjustment (SCC units only) 111048102

DAT Discharge air temperature sensor (50 ft cable length-field cut to length) 060004705ENT Entering fan air temperature sensor (50 ft cable length-field cut to length) 060004705OAT Outside air temperature sensor (50 ft cable length-field cut to length) 060004705RAT Return air temperature sensor (50 ft cable length-field cut to length) 060004705

SPS1 Static Pressure sensor: duct, No. 1 049545007SPS2 Static pressure sensor: duct, No. 2 049545007

Static pressure sensor: building (space) pressure 049545006T2 Transformer: 115/24 VAC 060004601T3 Transformer: 115/24 VAC 060004601T9 Transformer: 115/24 VAC 060630801

HUM1 Humidity sensor: wall mount 067294901Humidity sensor: duct mount 067295001

PC5 Dirty filter switch: first filter section 065493801PC6 Dirty filter switch: final filter section 065493801PC7 Airflow proving switch 060015801DHL Duct high limit switch 065493801OAE Enthalpy control: electromechanical 030706702

Enthalpy control: electronic (used with RAE) 049262201RAE Return air enthalpy sensor (used with electronic OAE) 049262202SD1 Smoke detector: supply air 049025001SD2 Smoke detector: return air 049025001

– BACnet MS/TP communication module (RS-485) 060006202– BACnet/IP communication module (IP cable 10BASET) 060006201– LONMARK space comfort controller (SCC) communication module 060006203– LONMARK discharge air controller (DAC) communication module 060006204– 5 VDC precision power supply 111049610– Serial port ribbon cable 111047201– MCB battery BR2325– MCB connector repair kit 300036605

Daikin IM 696-4 66

Daikin IM 696-4 67

13600 Industrial Park Boulevard, Minneapolis, MN 55441 USA (612) 553-5330

Daikin Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on training, or call 540-248-9646 and ask for the Training Department.

This document contains the most current product information as of this printing. For the most up-to-date product information please go to www.DaikinApplied.com.

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