WATER CHILLING UNITS - All World Machinery · PDF fileTHANK YOU FOR PURCHASED DAIKIN WATER...

CONTENTS1.SAFETY CONSIDERATION ……………… １

2.CAUTIONS IN GENERAL ………………… ４2-1 Operating range2-2 About working solution

3.CAUTIONS FOR INSTALLATION ……… ５3-1 Installation location3-2 Piping3-3 Suction strainer (Line Filter)

4.MODEL AND SPECIFICATION ………… ６

　４-1 Structure ｏｆ model name４-2 Specification

5.ELECTRICAL WIRING …………………… ７5-1 Switch box layout5-2 Circuit breaker installation5-3 Grounding and power source connection5-4 Remote control5-5 Connecting the synchronous temperature

sensor5-6 Connecting the output contact

6. CAUTIONS FOR OPERATION ………… ９

7. OPERATIONS ON CONTROL PANEL … 107-1 Introduction of control panel

For proper use

THANK YOU FOR PURCHASED DAIKIN WATER CHILLING UNIT. Before you use the unit, please be sure to read this instruction manual for knowing how to useit correctly. ● It will also help when, with the machine in use, you have any questions or have

experienced trouble of any kind about it. ● Please keep it with spare parts not to lose after reading.

PIM00118D

7-2 Function mode(1) Switching between modes(2) Normal mode(3) Operation setting mode(4) Operation lock mode(5) Monitoring data mode(6) Timer setting mode(7) Parameter setting mode　　 ■Parameter List(8) Auto tuning mode

7-3 Temperature warning function7-4 Alarm display

８．MAINTENANCE AND INSPECTION ……… 268-1 Casing8-2 Suction strainer8-3 Air filter8-4 For a prolonged layout8-5 Water quality control8-6 Maintenance of shell end tube type

heat exchanger

9．TROUBLESHOOTING GUIDE …………… 28

10 Notice and request regarding compliance with

“Law Concerning the Recovery and Destruction of

Fluorocarbons” for chillers … 31

　　AKZW458-C-A242A　AKZW458-C-A243　AKZW458-C-A244　

MODEL NAME

WATER CHILLING UNITS

1. SAFETY CONSIDERATION

The precautions described below are intended to prevent the users from suffering injury or damage. The matters which could occur due to erroneous handling are classified as follows.

Do by expert

Check

Transportation, installation, piping, wiring operation, maintenance and inspection should be done by experts.Check the power supply (voltage and frequency).

DANGER Indicates an imminently hazardous situation which may result in death or serious injury.

WARNING Indicates a potentially hazardous situation which may result in death or serious injury.

CAUTION Indicates a potentially hazardous situation which may result in injury or in property damage only.

Check the specification before performing power supply wiring.

Forbidden

Connect with the power cable in accordance with the wiring diagram in the specification or the operation manual. Improper connection may cause electric shock or fire.

Earth the ground terminal securely

Ground wire connection

The unit contains a noise filter.

A failure to connect the ground wire

could lead to electric shock.

Turn the power off when starting work

Check

Be sure to turn the power off and never keep wires alive when starting work. This may cause electric shock.

Wait at least 5 minutes to start work after turning the power off.

Forbidden

Discharge of the internal high-voltage live part (capacitor) takes 5 minutes. Starting work during this time may cause electric shock.

Don't operate with the covers of the equipment open.

Forbidden

Don’t operate with the casing of the unit or terminal box cover of the motor and other electric parts removed, which may cause electric shock.

DANGER

Check the weight, Hook at the designated position

Check

Hang the unit by hooking at the position designated in the outline drawing, and make sure that its weight is within the rated load of the hoisting attachment by checking the exact weight by the machine nameplate. A failure to do this may cause injury or breakage due to dropping or toppling of the unit.

Don't use out of specifications

Check

Operate the unit exactly according to the specifications described in the catalog and the delivery specifications. Failure to do this may cause serious accidents such as breakage of the main unit, injury, fire, and electric shock.

Don’t operate in explosive atmosphere

Forbidden

Do not install the unit in a place where flammable gas may be generated, flow in, stay or leak, or in a place where carbon fibers are suspended.

Don’t attempt disassembly or repairs.

Don’t disassemble

Do not perform remodeling. Disassembly or repair should be performed by our serviceman. Such actions done by customers may cause fire, electric shock or injury, and they are beyond our warranty.

Keep out water.

Forbidden

Do not spill or pour water on the unit, which may cause a short circuit or electric shock.

Be sure to observe the following precautions.　

１


Keep away from the unit while carrying it

Forbidde

Keep away from the unit while carrying it by a hoisting attachment.There is a fear of injury or damage due to dropping or turning over.

WARNING Perform wiring work

in accordance with the regulation

Check

The supply connection should be made in accordance with National Wiring Regulation. Failure to do this may cause burning or fire.

Take action according to the MSDSwhen refrigerant leakage occurred

Check

Very high concentration may Produce anesthetic and act as asphyxiant.

Don’t insert finger through an opening

Caution

A cover or casing is provided on the rotating part for safety. Don’t insert your finger through an opening, which may cause injury.

Fix the unit securely with bolts

Forbidden

Confirm the installing position of the unit with assembly diagram, and fix it securely with bolts or foundation bolts.

Stop operation at abnormal condition

Check

Stop operation immediately in case of abnormal conditions. Otherwise, damage, electric shock, fire or injury may be caused.

CAUTION

Don’t operate in special atmospheres

Forbidden

Don’t operate the unit in the special atmospheres such as high temperature or high humidity.

Check main unit safety before test operation

Check

When performing test operation of the unit, check the main unit is certainly in safety. Failure to do this may cause injury or dama

Keep the area for ventilation

Check

Don’t place object within 500mm of the air inlet or outlet vents. Blocked vents could cause the cooling capacity dropping.

Clean the filter regularly

Check

Clean the air filter once every two weeks. The dirty filter may degrade the cooling capacity, and increase the power consumption.

Use commercial power supply

Check

Be sure to use commercial power supply for power source. Use of inverter power system or the like may cause burnout.

２


CAUTION Release operation lock

before running the main unit

Check

Release the operation lock on the operation panel on the unit before starting the main unit. Running the main unit with operation lock will prevent it from cooling according to the specification and could damage the main unit.

Don’t run the pump on empty

Forbidden

Check the levels on the oil piping and tank before running. Running the unit on an empty pump will damage the unit.

Don’t mount the unit

Forbidden

Don’t mount the unit. Dropping from the unit may cause injury or damage.

Attach the flow switch to the main unit

Check

If the oil pump operation malfunctions, the oil supply to the main unit will stop. Normally, the oil cooling unit detects malfunctions and generates an alarm, but it may not be able to detect it depending on type of malfunction. If it becomes necessary to protect the main unit in this state, attach a flow switch to the oil route and observe the oil flow.

Confirm the oil piping

Check

Before operating, confirm that the piping of main unit is not blocked. If the piping is blocked,

the oil circulation hose may break due to heating. When the oil temperature rised and FH

alarm happened, stop the operation immediately.

Fix the unit firmly during transportation

Check

Fix the unit firmly to prevent movement by trembling or external force during transportation. Otherwise, the internal instruments may be damaged.

Prepare the power breaker on your site

Check

A power breaker is not included in the unit. It is recommended to use an earth leakage circuit breaker which is compatible with an inverter for more safety.

Wear gloves when performing maintenance, inspection, or cleaning

Check

The fin of heat exchanger is sharp, which caused injury. And, the compressor, the frame of the motor and the refrigerant pipe will get considerably hot, which may cause a burn.

About the CE-Model (Option)

Check

The CE mode (option) of the oil cooling unit (AKZ**7-C, AKZS**7-C) is categorized to the over voltage category II, supplementary machine it is declared for conformity under the following conditions. Please check the specification of the main unit. ① Supply disconnecting device according to EN60204-1 has to be provided during final installation. ② The main power shall be supplied via a transformer satisfying basic insulation.

３

2. CAUTIONS IN GENERAL2-1 Operating range

Since Oil Cooling Unit is a refrigeration machine, the operative room and oil temperatures are limited. Use Oil Cooling Unit in the range shown below.

2-2 About working solution

No other liquid but industrial purified water can be used in this machine.Lubricating oil and Hydraulic fluids (of mineral oil origin) shall be used for this unit.

　　　　　　　　　　・ This unit contains refrigerant HFC (R410A).　　　　　　　When disposing of this unit, be sure to recover R410A for global

environmental conservation.

CAUTION

４

Be sure to do.

Inlet liquid temperature（℃）

Roo

m te

mpe

ratu

re　

（℃

）

Operat

ional

range

3. CAUTIONS FOR INSTALLATION

3-1 Installation location ■Install in the following locations

1) On a solid and flat floor. (Inclining less than 5″) 2) Away from direct sunlight and heat. 3) Where there is good ventilation and little humidity. 4) Where the discharged gas will not be drawn in again. 5) A place convenient for piping and wiring. 6) Where there is little dust, dirt, powder, oil mist, etc.

■Do not place anything in the way of ventilation within 500mm distance from intake and exhaust areas.

3-2 Piping

The diagram below shows the inlet and outlet piping positions. 1)Regulate water flow to the prescribed amount. 2) Do not use more valves than necessary in the piping.

Valves, even if fully open, cause a considerable loss in pressure. 3) Use sealing tape around pipe connections to prevent air infiltration and oil leakage.

3-3 Suction strainer (Line Filter)

Dirt trapped in the evaporator of chiller causes not only reduction of cooling capacity but also trouble with thecompressor and oil pump. Use a 100～150 mesh suction strainer that causes little pressure loss for keeping theclean in the oil and oil piping. And perform periodical check of the strainer.

Water inlet

Water outlet

AKZW458-Ｃ-A2４２Ａ

AKZW458-C-A243

５

4. MODEL AND SPECIFICATION

６

４－１．Model mark

４－２．Main specifications

ＡＫＺＷ４５８

Series mark: 8-series

Series name AKZW : Energy-saving high-accuracy inverter chiller

Nominal cooling capacity（*1）

（*1）Nominal cooling capacity　　　　It shows the cooling capacity at an 　　　　inlet temperature of 25℃, room 　　　　　　temperature of 25℃, and 　　　　　　　　　　commercial power supply 　　　　　　　　　　frequency of 60Hz.　　　　・45：4.5ｋＷ　　

Model name

Cooling capacity (50/60Hz) *Note 1

Power supply Main circuit

Control circuit

Exterior color

Outer dimensions (H×W×D)

Compressor (hermetically sealed DC swing type)

Evaporator

Condenser

Fan

Motor Pump

Fan

type　　　Target of control

Fixed type Target of control

Refrigerant control

Protective function

Refrigerant Name

Charge amount

Operation Room temperature

range Inlet water temperature

Water volume

Usable liquid

Inlet

Outlet

Noise level (in an anechoic room)

Mass

Transport vibration performance

Rated current of molded-case circuit breaker *Note 2

Product tolerance is +5%.

　2. A molded-case circuit breaker is not included in the product. Procure one fit for your model locally

serves as only inlet water temperature.

1.1kW（equivalent）

Shell and coil type

Cross fin coil type

Propeller fan

4.5kW

3φ　200／200･220Ｖ±10％　50/60Hz

DC12/24V

790ｘ470ｘ533（including casters）

Night grey

－

75W

Compressor capacity control by inverter + electronic expansion valve

Inlet water temperature, work tank water temperature ※Note3

Room temperature, machine body temperature

Inlet water temperature, work tank water temperature ※Note3

AKZW458-C-A242A、A243、A244

Hose nipple Rc3/4×16

Hose nipple Rc3/4×16

55 kg

10～40℃

10～40℃

20～40L/min

R410A

Industrial purified water

59dB(A)

　　３．AKZW-458-C-A244 is not equipped with a work tank water temperature thermistor.A controlled object

Temperature

control

(Select

either type.)

Synchronization　Target of Synchroniza

Discharge pipe temperature thermostat, condenser temperature thermostat, high

pressure cut out switch, reverse phase protective device, restart protection

timer, low room temperature protection thermostat, high liquid temperature

protection thermostat, low liquid temperature protection thermostat, refrigerant

leak detector, a set of inverter protective devices

　　 and mount on the machine side.

Vertical 14.7m/s2 x 2.5h (10 – 100Hz sweep, 5min/cycle)

10A

970g

Connector

Note) 1. Cooling capacity at the standard point (room temperature of 25℃ and inlet water temperature of 25℃)

Ａ２４２ＡＣ－－Individual order mark

CE compliance

5. ELECTRICAL WIRING

７

CAUTION

・The supply connection should be made in accordance to the National Wiring Regulations. ・In the supply, be sure to attach the following switch near the main unit.

Switch spec.: The contact separation between the open contacts should be at lease 3mm. ・For electric wiring work, refer to the electric wiring diagram plate attached to the back side of switch box cover. ・ Do not change the wirings nor operate the electromagnetic switches manually inside the chiller. 5-1 Switch box layout

Main circuit capacitor

Powerterminal block

Signal wireterminal block

Tamper - resistant switch

DC reactor

For synchronous thermistor control

１０１１１２１３３０３１９６７６６６５６４６３６２６１６０

Normal

Temperature range malfunction output

For operation switchover signalPump interlock (remote control)

No use

Signal wire terminal block

Temper-resistant switch

OFF ON

Prevents changing of operation settings and parameter settings.(Factory setting)

Makes it possible to change operation settings and parameter settings.

Trouble/power failure

Alarm level output

No use

Control PCB

PE

Heat dissipation fin

If a cooling device is operated without operating a conveying pump, it will become a cause of failure of a compressor.

5-3 Grounding and power source connection

1) Remove the screw from the upper cover , then lift the upper cover . 2) Pass the supply wires through the hole (on either side of the unit). 3) Connect the supply wire and the protective earth wire to the terminal block.

◆ Diameter of wire ◆ Piping should be used for supply wire. ◆ Supply only from main machine through piping. ◆ Use M4 (M5 at AKZ908) round crimping terminals for all wiring. ◆ Fix the supply wire to the cable anchorage with cable band. ◆ Some model has different protective earth(PE) terminal, make connection regarding to the electric

circuit diagram 4) Replace the cover and fasten with the screw. 5) A [U1] displayed on the display panel when the power is turned on indicates a negative phase

connection, so replace either of the L1, L2, orL3 phases. 5-4 Remote control

Wire as indicated below for remote control. 1) Part to be prepared. 2) Remove the jumper (terminal Nos. [10]～[11] from the terminal block using screw driver. 3) Connect the part indicated in 1) above to this terminalblock using screw driver.

Part Single-pole, single-throw remote control switch or “a” contact capable of transmitting control signal. Note: Select one whose minimum applicable load is DC12V, 5mA.

Wiring material Solid wire: φ1.2 (AWG16) or Standard wire: 1.25mm2 (AWG16)

Tool Flat-head screwdriver (one with φ3 axis and 2.6 point width is recommended)

８

Standard AKZ148,328,438,568 siries AKZ908 siries

JIS heat-insulated vinyl 2.0mm2

heat-insulated vinyl 3.5mm2

UL UL1015 AWG#14(2.0mm2) UL1015 AWG#12(3.3mm

2)

IEC/CENELEC 2.5mm2

(245 IEC53/H05RR-F) 4.0mm2

(245 IEC53/H05RR-F)

　　　　　　When using an earth leakage breaker, be sure to choose one which is compatible with 　　　　　　an inverter. Non-compatible types might malfunction due to the extreme high-frequency 　　　　　　noise from the inverter.

CAUTION

5-2 Circuit breaker Installation

Since the main unit in not provided with a main power over-current circuit breaker, be sure to install the breaker given in the specification table (See 4-2). We recommend to use an earth leakage breaker for more safety.

5-5 Connecting the synchronous temperature sensor

Follow the instructions below when connecting an optional synchronous sensor. 1) Connect the parts in 1) above to the terminal block [30-31]. 2) Attach the sensor.

5-6 Connecting the output contact If you are using an output contact, connect any necessary signal wires as laid out below. See [Alarm Processes] for details on alarms. If using together with an output contact, change the parameter settings and make sure it is connected properly. (See Item 7-2(7) [Parameter Setting Mode] for details on how to change the parameters.)

1) Signal output circuit

2) Alarm output logic

The alarm output logic can be changed using the Parameter settings.

3) The output signal will become undefined when the

power is on. Set up the sequence in the main unit to ignore the signal for one second after the power is turned on.

９

CAUTION・Use a load DC 10mV and 10uA or

higher in order to prevent bad connections with the contact.・Maximum loads are as follows;

DC load: 30V and 2A or lower・Be sure to use a surge protection

device when connecting an induction load.

CHECK

CAUTION・Directory air flow to the sensor

causes the offset of sensing temperature.Use the thermal insulant like putty.・Screw in the sensor at full length

when use the AKSZ8-OP-K*.CHECK

10

5-7 External output contact time chart

ONOFF

OFF

ON

OFF

6. CAUTIONS FOR OPERATION

6-1 Never operate without water. Doing so may cause a breakdown of the compressor.

6-2 Prevent air from getting in the water piping system. (If air is mixed in, it causes noise.)

　　　　　　　　　Be sure you have read and fully comprehended the contents of the operation manual before operating the unit.

CAUTION

11

7-1 Introduction of control panel № Name Content

① Power lamp This lamp lights up when power is supplied.

② Alarm lamp This lamp lights up or flickers when an abnormality occurs.

Level 1 alarm: Flicker Level 2 alarm: Light up

③ Timer mode lamp This lamp flickers while oil coolinng unit stops under timer mode.

④ Function display

It shows present operational mode. NORMAL: Normal mode SETTING: Operational data setting mode MONITOR: Monitor value display mode TIMER:Timer setting mode

⑤ Mode/ Selected No. display

It shows present temp. control mode, or data number of displayed data in data display.

⑥ Data display It shows data of selected mode and data number.

⑦ Select [SEL] key Use to select the function mode.

⑧ [DOWN] key Use to change the display of operation mode/data number/data value backward by one step. By pressing and holding down this key, key repeat is started.

⑨ [UP] key Use to change the display of operation mode/data number/data value forward by one step. By pressing and holding down this key, key repeat is started.

⑩ Confirmation [ENT] key

Use to fix operation mode/data number/data value being changed. Use to light off the filter sign lamp, when the filter sign lamp is on at the normal mode.

7. OPERATIONS ON CONTROL PANEL

12

ＮＯＲＭＡＬ

ＳＥＴＴＩＮＧ

ＭＯＮＩＴＯＲ

ＴＩＭＥＲ

ＡＬＡＲＭＴＩＭＥＲＰＯＷＥＲ

ＭＯＤＥＤＡＴＡ

④ ⑤ ⑥

⑦ ⑨⑧ ⑩

① ③②

7-2 Function mode

There are seven operation modes for the control panel, as listed below. Only four modes are commonly used for everyday operation. The other modes should only be used by technical personnel with a thorough understanding of their uses, as misuse could cause the chiller to malfunction.

(Remark) ○: Commonly used mode. (1) Switching between modes

Normally you press the key to switch between modes. To switch to special modes, you must press a particular combination of keys for 2 seconds.。

Function mode Description LED STATUS

Operation lock mode Stops operation of the chiller in any setting mode.

○ Normal mode Displays the current operation mode and the target control value.

“NORMAL” illuminates

○ Operation data setting mode Sets the operation mode and the target control value.

“SETTING” illuminates

○ Monitor value display mode Displays the current value of each sensor. “MONITOR” illuminates

○ Timer setting mode When timer value is set, the oil cooling unit stops. “TIMER” illuminates

Parameter setting mode Sets the basic parameters for the oil cooling unit. "SETTING" flickers

Auto tuning mode Gains for temp. controll are calcurated and set. “NORMAL” flickers

13

Press keys simultaneouslyfor 2 seconds.

　　CAUTION　　●Factory setting is as follows.



Power　Supply

OperationLock　mode

Auto　tuningmode

Normalmode

Operation data setting mode

Parameter setting mode

MonitorValue　displaymode

Timersetting mode

Operation lock mode : ResetMode: 4　(Inlet water temperature, machine body 　　　　　　synchronization control)Offset: 0.0K

(2) Normal mode

This is the mode that the unit automatically enters when the power is turned on. In this mode, the data display automatically shows the status of the chiller.

(3) Operation setting mode You can set the oil cooling unit’s operation mode and the temperature control goal in this mode.

You can select the mode and the data with the key.

The mode and the data are confirmed by pressing the key when the data display is

flashing.

If you press the key before that, the mode or data being changed will be lost, and

operation will continue again with the original settings.

Operation panel display Remarks

Normal operation

MODE:displays the operation mode. DATA:displays the operation goal temperature.

Alarm generated

MODE: off DATA: displays the alarm code by flashing. ALARM lamp: flashes for level 1 malfunction remains on for level 2 malfunction.

Operation lock

MODE: off DATA: ‘Loc’ is displayed by flashing.

Can be released by pressing the and

keys for five seconds.

When in operation lock, all operations including the oil cooling unit pump shut down.

14

ＮＯＲＭＡＬ



ＴＩＭＥＲ

ＰＯＷＥＲＡＬＡＲＭ


ＮＯＲＭＡＬ



ＴＩＭＥＲ

ＰＯＷＥＲＡＬＡＲＭ


ＮＯＲＭＡＬ



ＴＩＭＥＲ

ＰＯＷＥＲＡＬＡＲＭＴＩＭＥＲ


ＮＯＲＭＡＬ

ＴＩＭＥＲ



ＡＬＡＲＭＰＯＷＥＲＴＩＭＥＲ


ＮＯＲＭＡＬ

ＴＩＭＥＲ





blinking

Exit　this　mode

Forward one dataBack one dataBack one mode Forward one mode

blinking

● Fixed temperature control (modes 0～1) Controls the unit so that the controlled temperature reaches the set temperature.

● Synchronous temperature control (modes 3～6) Controls so that the controlled temperature reaches the temperature calculated according to the formula below.

Set within the temperature range for working solution, 10℃ - 40℃.

● Direct capacity control (mode 9) Does not control the temperature but directly controls the cooling capacity.

Operation modes which are not available will show up as ‘---‘ in the data display, and cannot be set.

Note) Not available because AKZW-458-C-A244 is not equipped with a work tank water temperature thermistor.

ﾞ№ Mode Setting Range

０ Water inlet temp. fixed control

１ Work tank water temp※NOTE fixed control

10.0℃～40.0℃

２ Not used

―――

３ Water inlet and air temp. synchronous control

４ Water inlet and machine body temp. synchronous control

５ Work tank water and air temp※NOTE synchronous control

６ Work tank water and machine body temp※NOTE synchronous control

－９．９K～９．９K

７ Not used

８ Not used

―――

９ Direct control of cooling capacity of inverter compressor ０～１００％

Control goal temperature = synchronous original temperature + set value (off-set)

15

(4) Operation lock mode

This mode shuts down all operations for the chiller, and forbids the operation of any key other than lock release.

Press the and keys for two seconds in one of the normal modes (normal mode, operation setting

mode, or monitor mode). “Loc” will flash on the data display and turn into the operation lock mode..

Also press the and keys for two seconds when disengaging operation lock mode.

When running or stopping the chiller with the control panel, use this operation. (5) Monitoring data mode

This mode is displaying temperature detected by each sensor and the IN/OUT condition.

You can choose any data by key key.

No. Content

０ Machine body temp. [TH1] *1)

１ Work tank water temp.*3) [TH2] *1)

２ Air temp. [TH3] *1)

３ Water inlet temp. [TH4] *1)

４ Suction pipe temp [TH5] *1)

５ Not used *1)

６ Direct control value (%)

７ Frequency of INV for comp. (rps)

８ Frequency of INV for pump (Hz)

９ State of expanded DIN (100 column), DOUT (1 column)

*2)

16

*1)“99.9” is displayed at disconnected or failure condition.*2) This function is available with optional communication expansion PCB.*3) AKZW-458-C-A244 is not equipped with a work tank water temperature thermistor.

ＮＯＲＭＡＬ

ＴＩＭＥＲ





ＮＯＲＭＡＬ

ＴＩＭＥＲ



ＡＬＡＲＭＰＯＷＥＲ


(6) Timer setting mode

Timer value(hr) is displayed on 7segment LED.

When timer value is selected by key key ,

and is confirmed by key, the oil cooling unit is stopped.

When 0 is set as timer value, the oil cooling unit starts running.

ＴＩＭＥＲ


ＡＬＡＲＭＰＯＷＥＲＴＩＭＥＲＮＯＲＭＡＬ


(7) Parameter setting mode

This mode sets the parameters which define the basic operation of the oil cooling unit. Select the parameter number using the and keys with ‘P’ flashing in the mode display. After the parameter number has been displayed on the data display for approximately 0.5 seconds, the data will be displayed. Pressing the key will start the data display flashing.

The and keys will change the data, and the will confirm the changes.

If the key is pressed before confirming the data, the data will return to the original values.

Note: Some parameters become activated right away while others will only become activated after the power has been shut off and then turned back on. See the parameter list to see to which group the changed parameter belongs.

ＮＯＲＭＡＬ

ＴＩＭＥＲ





ＮＯＲＭＡＬ

ＴＩＭＥＲ





ＮＯＲＭＡＬ

ＴＩＭＥＲ





Forward one dataBack one data

blinking blinking

blinking

Back one parameter No

Will return to the original number after 0.5 seconds

Foward one parameter No

Exit this mode

17

18

■ Parameter List № Content Min.

valueMax. value

Initial set Unit Setting at

re-operation Remarks

ｎ００ Not used ０００－

ｎ０１ Logic of alarm output ０１１０－ ○

ｎ０２ Alarm level of option contact ０３０－

ｎ０３ Alarm level of option contact 2 ０２０－

ｎ０４ Degree of liquid temperature drop （complete condition of autotunning）

0.0 10.0 8.0 ℃ For autotuning

ｎ０５ Coefficient of Ｐ／Ｉ gain 0.1 10.0 2.0 － For autotuning

ｎ０６ Gain of temp. control P (at low deflection) １９９９ 300 －

ｎ０７ Gain of temp. control I (at low deflection) １９９９ 300 －

ｎ０８ Gain of temp. control P (at high deflection) １９９９ 900 －

ｎ０９ Gain of temp. control I (at high deflection) １９９９ 900 －

Exclusive value

ｎ１０ Warning setting 1 ０８６５５６３－

ｎ１１ Warning setting data 1 0.0 60.9 0.１－

ｎ１２ Warning setting 2 ０４６５４６３－

ｎ１３ Warning setting data 2 0.0 60.9 ８.１－

ｎ１４ Warning setting 3 ０４６５４５１－

ｎ１５ Warning setting data 3 0.0 60.9 ４１.１－

Never change the settings. Doing so may cause a breakdown.

ｎ１６ Warning setting 4 ０４６５０－

ｎ１７ Warning setting data 4 0.0 60.9 0.0 －

ｎ１８ Warning setting 5 ０４６５０－

ｎ１９ Warning setting data 5 0.0 60.9 0.0 －

Refer to the chapter of Temperature warning function.

ｎ２０ On/Off of parallel communication ０１０－ ○ Option part for communication to be prepared.

ｎ２１

～

ｎ３８

Reserved －－－－ Don’t change value.

19

○ n00: filter sign setting time The filter cleaning sign lamp will light up on the display panel once the compressor’s accumulated operating time exceeds the set amount of time. Can be set in 100-hour intervals. For example, entering ‘3’ will set it for 300 hours.。

○ n01: Logic of alarm output Sets the output logic of alarms or warnings.

Output logic for alarm output(60,61,63)and warnings(66,67)on the signal wire terminal block. ○ n02: Alarm level of option contact

Sets the operation for the signal input to the optional protective device connection terminal (option) on the signal wire terminal block.

‘0’: does not use the option contact. (Factory setting) ‘1’: generates a level 1 malfunction when the option contact shuts off. ‘2’: generates a level 2 malfunction when the option contact shuts off. ‘3’: generates a level 1 malfunction if the option contact is still not on 30 seconds after the pump starts operating. (Flow-switch compatible) [Note] Simply connecting a protective device to the option terminal will not run the protective functions. This parameter must be set.

○ n03: Alarm level of option contact 2 Sets the operation for the signal input to CN2 (option contact 2) on the temperature control P-board.

‘0’: does not use the option contact 2. (Factory setting) ‘1’: generates a level 1 malfunction when the option contact 2 shuts off. ‘2’: generates a level 2 malfunction when the option contact 2 shuts off. [Note] Option contact 2 may be used as an option when the unit is sent from the factory.。

○ n04: Drop level of temperature at oil outlet（condition of autotuning complete） ○ n05: Coefficient of gain of temperature control P and I.

This value is available for autotuning. ○ n06: Gain of temperature control P (at low deflection)

n07: Gain of temperature control P (at low deflection) n08: Gain of temperature control P (at high deflection) (for AKZ type) n09: Gain of temperature control P (at high deflection) (for AKZ type) n06～n09 set the temperature control gain. n06 and n07 is used when the difference in temperature between the control goal and the set temperature is small.

n08 and n09 is used when the difference in temperature between the control goal and the set temperature is large.

Setting ０ 1 (2～9 run the same as 1) Contact point When running

normally During power

outage When an alarm

is generatedWhen running

normally During power

outage When an alarm

is generated６０－６１ＯＮＯＦＦＯＦＦＯＦＦＯＦＦＯＮ

alarm output ６０－６３ＯＦＦＯＮＯＮＯＮＯＮＯＦＦ

Temperature range malfunction output (Warning output)

６６－６７ＯＮＯＦＦＯＦＦＯＦＦＯＦＦＯＮ

The output logic for the DOUT signal (communication extension PCB (an option) is necessary). See the operating manual(HM01568) for the communication extension PCB for further details.

○ n10, n12, n14, n16, n18: Temperature warning setting Sets the selection of comparison for temperature warnings 1～5 as well as what action to be taken when the conditions are fulfilled. See the chapter “Temperature Warnings” for further details.

○ n11, n13, n15, n17, n19: Temperature warning setting Sets the value for comparison for temperature warnings 1～5. See the chapter “Temperature Warnings” for further details.

○ n20: On/Off of parallel communication Sets whether or not to carry out parallel communication with the main unit.

‘0’: does not carry out (factory setting) ‘1’: carries out If you connect a communication extension P-board and set the parameter to ‘0’, its parallel output will be used to output alarm status and temperature warnings individually.

ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



（Normal mode）

（Normal mode）

（Normal mode）

（Normal mode）

Error

Error

Error

①Auto tuning start

②Step：０（Check of condition）

③Step：１（Wait for initial stability）

④Step：２（Acquisition data）

（1% output）

（100% output）

（Stop）

（Stop）

（８）Auto tuning mode

In this mode，gains of temperature controll P and I are calculated automatically and set to parameter No6,7,8,9.

20

ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



（Normal mode）

（Normal mode）

Error

⑤ｓｔｅｐ：３（Calculation for gain）

⑥Complete

（Stop）

（Stop）

（Stop）

21

[Note] 1) Before entering auto-tuning mode, you must first select operation mode (except mode 9) to be used, so as to

determine a control target sensor (secondary cooling water temperature thermistor). 2) If the remote signal is cut off or an alarm is generated in auto-tuning mode, an error (inexecutable state) will

result and be displayed. To cancel the error, press the key. (The unit returns to normal mode.) Track down the cause of the error, and after troubleshooting, execute auto-tuning again.

3) In Step 2, data of the control target are collected with 100% operation of Mode 9 for 10 minutes. Consequentlythe machine might be overcooled. To control overcooling, set the AT termination conditions with parameterNo.4. Parameter No.4 Degree of cooling water temperature drop (AT termination condition) Setting range: 0.0 – 10.0℃ Standard value: 8.0℃ When the secondary cooling water temperature drops by the setting value, auto-tuning (data collection) is terminated. If the set temperature value is too small, accurate control gain may not be calculated. It is necessary, therefore, toset the largest possible value within the range that does not cause damage to the machine.

4) In order to calculate optimum control gains using collected data, you must set the response coefficient withparameter No.5. (Adjustment of this response coefficient enables selection between stability-oriented type and responsivity-oriented type.) Parameter No.5 Coefficient for calculation of P/I gains Setting range: 0.1 – 10.0 Standard value: 2.0 Smaller values are more likely to improve stability, and larger values to improve responsivity. If you set an extremely large or small value, you may fail to obtain proper gains. Set an appropriate value with thestandard value as a guide.

5) At the time of completion of auto-tuning, the unit is in the state of 0% operation (stop). (As for operation in each step, see the flowchart.) When you press the key to enter normal mode, the unit returns to the original operation mode.

6) You may not be able to obtain the optimum control gains with a single calculation, depending on the condition ofthe control target (machine). Perform several calculations to obtain a mean value or adopt a mode (excludingextreme values).

7) When starting auto-tuning, start from the state where room temperature and cooling water temperature are almost the same (stable condition). During auto-tuning, the main unit should be at no load (stopped).

7-3 Temperature warning function 1) Summary

When water temperature exceeds the predetermined temperature range, temperature warning processing chosen from 30X relay output ON, Low cooling water temperature protection, and High cooling water temperature protection is performed.

Moreover, it can return with preset temperature from Low cooling water temperature protection state. 2) Parameter setting

2 sets parameters( [n16,n17] [n18,n19] ) is supported, so 2 warninng level can be set. ①Setting for monitored temperature

Parameter：n16,n18 The grade of 100 and 10 of 7 segments LED. Following table shows monitored temperature and parameter. Ａ：water temperature Ｂ：room temperature or machine body temperature Ｃ：warning thershold temperature

Parameter n16、n18 n17、n19 Monitored temperature

The grade of 100 The grade of 10 The grade of 100、10

Ａ－Ｂ≧ＣＡ is higher thanＢ.

A is set by value. B is set by value. C is set by value.

Ｂ－Ａ≧ＣＡ is lower than B.

B is set by value. A is set by value. C is set by value.

Ａ≧ＣＡ is higher thanＣ.

A is set by value. ５ is set. C is set by value.

Ａ≦ＣＡ is lower thanＣ.

A is set by value. 6 is set. C is set by value.

０ Do not use the warning function

１ Machine body temperature [TH1] ２ Work tank water temperature [TH2] ３ Room temperature [TH3] ４ Entering water temperature [TH4]

０ Do not use the warning function １－Machine body temperature [TH1] ２－Work tank water temperature [TH2]３－Room temperature [TH3] ４－Entering water temperature [TH4] ５ ≧Absolutely ６ ≦Absolutely

22

ＮＯＲＭＡＬ




ＴＩＭＥＲＭＯＤＥＤＡＴＡ

②Setting for action Parameter：n16,n18 The grade of 1 of 7 segments LED. ・30X relay output

66-67 contact is ON or OFF according to the value of parameter n01. ・Low cooling water temperature protection Compressor stops. Alram is not displayed. By setting for warning release, operation can be resumed automatically. ・High cooling water temperature protection Compressor stops. Alram is displayed. Operation can be resumed only by turning off and on. ③Setting for warning threshold temperature Parameter：n17,n19 The grade of 100 and 10 of 7 segments LED. Chose the value of monitored temperature from 1 to 99 as warning threshold. ④Setting for warning release differencial temperature Parameter：n17,n19 The grade of 1 of 7 segments LED. Chose the value of differencial temperature from 1 to 9 as warning release. ●When monitored temperature becomes Tr－Tw,warning is released.

Tw：warning threshold temperature Tr：warning release temperature Ex． When ｍonitored temperature and warning threshold are set as follow、 Monitored temperature ：room temperature－cooling water tempearature

Warning threshold ：５ degrees To releas warning when cooling water tempearature become lower than３degrees, setting value is ２（＝５－３）

●Warning release is available at the status that low cooling water temperature protection is active.

Action

30X relay

output

Low cooling water

temperature protection

High cooling water

temperature protection

０ × × ×

１ ○ × ×

２ × ○ ×

３ ○ ○ ×

４ × × ○

５ ○ × ○

23


ＴＩＭＥＲ


ＮＯＲＭＡＬ


ＮＯＲＭＡＬ




ＴＩＭＥＲＭＯＤＥＤＡＴＡ


ＴＩＭＥＲ


ＮＯＲＭＡＬ


⑤ Parameter value list Following table shows parameter value for available cases.

（n10, ｎ12, ,n14, ,n16, ,n18）（n11, ｎ13, ,n15, ,n17, ,n19）

Monitored temperature （See①）

Action （See②）

Warning threshold

temperature （See③）

Warning release

differential temperature

（See④）

Condition of monitored Temperature

The grade of 100

The grade of 10

The grade of 1

The grade of 100、10

The grade of 1

Warning is not available. ０００００ Work tank water temperature ≧Machine body temperature

２１１or４or５ Not available

Work tank water temperature ≧room temperature

２３１or４or５ Not available

Work tank water temperature ≦Machine body temperature

１２１or２or３

Work tank water temperature ≦room temperature

３２１or２or３

Chose the value from １to 9 *1

Inlet water temperature ≧Machine body temperature

４１１or４or５ Not available

Inlet water temperature ≧room temperature

４３１or４or５ Not available

Inlet water temperature ≦Machine body temperature

１４１or２or３

Inlet water temperature ≦room temperature

３４１or２or３

Chose the value from 1 to 99.

Chose the value from １to 9 *1

Work tank water temperature ≧fixed value

２５１or４or５ Not available

Work tank water temperature ≦fixed value

２６１or２or３ Not available

Inlet water temperature ≧fixed value

４５１or４or５

Inlet water temperature ≦fixed value

４６１or２or３

Chose the value from 1 to 99. Chose the

value from １to 9 *1

*1 In case of setting 4 or 5 for action of（n16, n18）,warning release function is not available. ●Example of setting

When the work tank water temperature becomes lower than (room temperature - 4)℃, a warning for protection of low work tank water temperature, with 30x relay output, is activated, and when the work tank water temperature becomes (room temperature - 3)℃ or higher from the warning state, the warning is reset. To set the above-mentioned conditions using parameters (n16, n17): The hundred’s place and ten’s place of the parameter n16 are 3 and 2, respectively, from the table above or from ①. The one’s place of the parameter n16 is 3 from ②. As to the hundred’s place and ten’s place of the parameter n17, because (room temperature - 4) is a condition, only the ten’s place is 4. The one’s place of the parameter n17 is 1 that is the difference between the warning resetting temperature and the warning issuing temperature. Consequently, Parameter n16: 323 Parameter n17: 41

24

When a malfunction occurs in the chiller, the content of the malfunction is displayed in the following three ways. It will also be output to the output contact. (See “5-6 Connecting the output contact”.)

Failure

level

Display Running

status

Output contact

Level1 alarm

Malfunction warning lamp: flashes Data display: flashes Alarm code flashes (second and third digits)

The cooling function is stopped. The exhaust fan is stopped.

Output

Level2 alarm

Malfunction warning lamp: flashes Data display: flashes Alarm code flashes (second and third digits)

The cooling function is stopped. The exhaust fan is running.

Output

Warning

Malfunction warning lamp: goes off Data display: flashes Monitored item +E flashes (first and second digits)

The oil cooling unit continues to operate normally. But the temperature of monitored item is out of range.

See temperature warning function (7-3).

※ If more than one malfunction occurs at once, the malfunction with the highest level will be displayed.

25

7-4 Alarm display

ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



ＮＯＲＭＡＬ



ＴＩＭＥＲ



8. MAINTENANCE AND INSPECTION8-1 Casing

1) Wipe the casing surface with a dry cloth. In any case, do not pour water directly. (When it is wet,which causes electricity leakage and fire.)

2) Do not use a brush, polishing powder, acid or solvents such as benzene, hot water, etc. because they will damage the paint.

8-2 Suction strainer 1) Periodically clean the suction strainer to prevent a reduction of flow volume to the pump

caused by clogging dirt.

8-3 Air filter 1) Wash the air filter once every two weeks in a water below 40℃.

(Not only is air flow reduced, performance lowered and consumption up if the air filter is clogged withdirt and dust but the device to protect the compressor may be activated and smooth operation will not be possible.)

2) If operated without the air filter engaged, if may cause troubles. 3) Clean the condenser with a brush, air gun, etc. if it is very dirty.

(Wear gloves when working since the fin of the condenser is dangerous.)

8-4 For a prolonged layoff 1)Put a cover over the chiller to prevent dust or water from getting into the chiller. 2) Turn OFF the operation switch and main power. 3) Be careful that oil dust and dirt do not build up on the surface of the condenser.

8-5 Water quality control

The shell and tube type heat exchanger is not structurally designed to allow disassembly for cleaning or partreplacement. Use freshwater (tap water)-level water which satisfies the water quality standard to prevent corrosionand scale adhesion.

For water quality level, refer to the water quality standard for chilled water on the next page. Carry out a water quality test, cleaning of the strainer, and water volume check, periodically.

8-6 Maintenance of shell and tube type heat exchanger

Shell and tube type heat exchangers may incur deterioration of the capacity or decrease in flow rate due to scaleadhesion. It is necessary to prevent scale by carrying out well-planned periodical maintenance.

1) Carry out cleaning once every three months, as a guide. To clean, connect the tap water pipe opposite to the normal direction, and run water until no morecontaminated water is discharged.

2) If the antifreeze function is activated frequently, consult your dealer and carry out cleaning using chemicals.

26

27

Item Chemical formula Water quality standard UnitpH 6.5～8.2 pH(25℃)Electrical conductivity 0.2～30 or less ms/m(25℃)Chloride ions CI 50 or less mg/l (ppm)Sulfate ions SO4 50 or less mg/l (ppm)Acid consumption (pH 4.8) CaCO3 50 or less mg/l (ppm)Total hardness 70 or less mg/l (ppm)Calcium hardness CaCO3 50 or less mg/l (ppm)Ionic-state silica SiO2 30 or less mg/l (ppm)Iron Fe 0.3 or less mg/l (ppm)Copper Cu 0.1 or less mg/l (ppm)Sulfide ion S-- mg/l (ppm)Ammonium ion NH4+ 0.1 or less mg/l (ppm)Residual chlorine CI 0.3 or less mg/l (ppm)Free carbon dioxide CO2 4.0 or less mg/l (ppm)Stability index ---- 6.0～7.0Matson ratio HCO3/SO4 1.0 or moreHydrogen carbonate ion HCO3 ---- mg/l (ppm)Amount of oxygen 0.1 or less mg/l (ppm)Aluminum Al 0.2 or less mg/l (ppm)Manganese Mn 0.1 or less mg/l (ppm)Nitrate ions NO3 100 or less mg/l (ppm)Sodium ions Na+ 20 or less mg/l (ppm)

PO4--- 20 or less mg/l (ppm)NH3 0.5 or less mg/l (ppm)

Residue on evaporation Mn++ 10 or less mg/l (ppm)Turbidity H2S 0.05 or less mg/l (ppm)

50 or less mg/l (ppm)2℃ or less

Water quality standard for chilled water

9.TROUBLE SHOOTING

28

If the chiller is not in good operating condition, check the following first.If the trouble persists, contact our service center and give a description of ①Model name, ② Production number(① and ② are shown on the machine nameplate) and ③ the condition of your machine (in as much details as possible).

9-1. When abnormal operation is suspected although an alarm is not raisedItem Condition Cause Remedy

1 The unit does not work at all.(The power indicator lamp on the operation

panel does not light up.)

① The main power is not supplied, or wiring to the power source (L1, L2) is

disconnected.

○ Check the wiring to see that the power is supplied to the power terminal.

① The remote operation inputs [10] - [11]

are off.

○ Check the connection of the remote operation

inputs. 2 The pump does not run.

(The water pump is installed outside the machine.)

② The unit is in operation lock mode.(The operation lock is released at the factory.)

○ Release lock mode on the operation panel.

① Piping on suction side of the pump is loose.

○ Check the packing of the piping, and tighten the piping.

② The suction strainer is clogged. ○ Clean the suction strainer. ○ Change the oil in the oil tank if it is dirty.

③ The oil level of the oil tank is too low. ○ Replenish the oil tank with oil.

④ Excessive pressure loss in the oil

discharge piping causes pump relief to work.

○ Use a larger-diameter oil pipe and shorten the

piping.

3

Cooling water does not run although the pump is running.

Cooling water flow is low, and pump noise is large. (The water pump is installed outside

the machine.)

⑤ Excessive pressure loss in the oil suction piping causes pump cavitation.

① Thermostat control stops the compressor. －－－

② Anti-restart timer for the compressor (30 sec.) is activated.

○ Make sure that the compressor starts after a lapse of time set by the timer.

③ Low oil temperature protection (at an inlet oil temperature of 2℃ or below) is activated.

○ Make sure that the compressor functions normally at an inlet oil temperature of 5℃ or higher.

④ Low outside temperature protection (at an ambient temperature of -2℃ or below) is

activated.

○ Check that the compressor functions normally at an ambient temperature of 0℃ or higher.

4 The compressor does not run

although the pump is running.

⑤ Operation mode is set at mode 9 and at

0%.

○ Change to the proper operation mode.

① There is an obstruction near the air

inlet/outlet.

○ Remove the obstruction.

② The air filter is dirty. ○ Clean the air filter.

③ Ambient temperature is high, and drooping operation is performed.

○ See the catalog to check the capacity within the operating temperature range, and select a model with proper capacity.

④ Heat load is too large.

⑤ Set temperature is too high. ○ Change to proper temperature setting.

5 Cooling water is not cooled although

the compressor is running.

⑥ If the exhaust air temperature is almost the same as ambient temperature even

though the compressor is running, refrigerant gas is in short supply.

○ Contact our service center.

① If "---" appears on the data display, a temperature sensor to be used in that operation mode is not connected.

○ Connect the temperature sensor first.

6 Operation setting cannot be done. ② If "---" appears momentarily when the ENT key (far-right key) is pressed, the

tamper-resistant switch is set to ON.

○ Turn the tamper-resistant switch (SW1) on the control circuit board to the OFF position.

(The tamper-resistant switch is turned on at the factory.)

29

9-2. When an alarm is raisedlarm Description

Code of Alarm

① ,DC fan motor is not running. DC fan motor must be replaced.

① ,Communication. errorCheck the connector.Replace the PCB.

E1 1 System trouble ① Internal parameter is improper. Controll boad needs to be replaeced.

①Cooling water temperature or roomtemperature is higher than specifications.

Use within operating temperature range.

②There is an obstruction near the airinlet/outlet.

Do not place anything which may interfere with the airpassage within 500 mm from the air inlet/outlet .

③The air filter is clogged, or the condenser isdirty.

Clean the air filter referring to Section 8"Maintenance/Inspection".

④ Other than the above Contact our service center.

①Cooling water temperature or roomtemperature is higher than specifications.

Use within operating temperature range.

②There is an obstruction near the airinlet/outlet.


③The air filter is clogged, or the condenser isdirty.

Clean the air filter referring to Section 8"Maintenance/Inspection".

E6 2 Compressor (M2C) is locked. ①The compressor is out of order. (It mustbe replaced.) It is necessary to replace a compressor.

①The solenoid valve coil is broken, or theconnector is disconnected. Check the connection.

②The valving element of the solenoid valveis out of order. The solenoid valve must be replaced.

①It has become overloaded due to use ofhigh-viscosity oil.

Use operating oil having viscosity of 4 - 200mm2/s atthe oil temperatures within operating range.

②Room temp. is so high as to exceedspecifications. Use within operating temperature range.

③ Agitator motor is locked. Check the agitator.

EJ 1/2 Locally provided protectivedevice (OP.) was activated. ①

Field-connected protective device (someunit products are connected at the factory)was activated.

Check the trouble detected by the protective deviceactivated.

①The heating value of the main unit exceedsthe cooling capacity of the chiller.

If the machine is installed properly, and the compressoris running with 100% capacity (you can check inmonitor mode), select a size larger cooling capacitymodel.

②Cooling capacity is degraded due to anobstruction near the air inlet/outlet .


④

Temperature control is not availablebecause operation is performed in mode 9(direct capacity command).

Operate in appropriate operation mode. (The directcapacity command mode does not perform feedbackcontrol of temperature.)

⑤ No more refrigerant gas

If exhaust air temperature is almost the same as ambienttemperature even though the compressor is running, theproblem is suspected in refrigerant gas. Contact ourservice center.

A break in a wire or short circuit occurredin a pneumatic sensor necessary forcontrol.

Identify the sensor which is malfunctioning in monitordisplay mode on the operation panel ("-99.9" willappear.), and check the wiring.

If the nominal temperature is exceeded, cooling capacitydrops below the nominal capacity due to droopingcontrol.Make sure that the cooling capacity of the chillerexceeds the heating value of the main unit over thewhole operating temperature range.

③

H1 2

Pneumatic/temperaturesensor trouble(TH5：Machine bodysynchronous sensor)(TH3：Room temperaturesensor)

①

Cause

Discharge pipe thermistorTH5 was activated.Compressor head thermo(S2B：CN5) was activated.

The solenoid valve for hotgas is out of order.

FH 2 Cooling water temperatureexceeded 60℃.

The nominal point temperatures (Roomtemperature: 20℃, secondary coolingwater temperature: 25℃) are exceeded,leading to drooping of the capacity.

EH 1

Agitator internal thermal(S1B：CN3) wasactivated.(For machinesequipped with water pumponly)

E3 2High pressure switch(S3PH：63H：CN6) wasactivated.

E5 2

E9 2

AlarmLevel Remedy

A6 2 DC fan motor is locked.

30

larm Description

Code of Alarm

J3 2Discharge gastemperature sensortrouble

① A break in a wire or short circuit occurred. Check the wiring.

J5 2Expansion valvetemperature sensortrouble


J6 2Condensortemperature sensortrouble


L0 2 Inverter/compressortrouble ① The compressor or inverter is out of order. Controll boad or compressor must be

replaced.

P4 2Fin temperaturesensor trouble ① A break in a wire or short circuit occurred. Check the wiring.

U0 2 Short of gas ① Gas leak occurred by pipe trouble. Repair the pipe and fill the gas.

①Power supply connection is performed innegative phase.

Replace two of the three phases in powerwiring.

② L3 is lacked Conect the wiring.

UH 2 System failure(EEPROM error) ①

Trouble occurred in the parameter stored in thecontrol P-board.

Controll boad must be replaced.

UJ 1/2 OP2 was activated. ①

Field-connected protective device (some unitproducts are connected at the factory) wasactivated.

Check the trouble detected by theprotective device activated.

1E －Freeze protectionwarning ①

The suction pipe temperature dropped to below0℃, and the compressor stopped operation forprevention of freeze. When the suction pipetemperature becomes 1℃ or higher, it restartsoperation.

Make sure that both room temperatureand liquid temperature are within theoperating range before restarting.

2E －Low watertemperature warning ①

Because the water temperature dropped to 8℃or below, the compressor stopped operation.When the water temperature becomes 9℃ orhigher, it restarts operation.

Prevent the water temperature fromdropping to below 9℃.

3E －High watertemperature warning ①

he water temperature is 41℃ or higher. Thecompressor does not stop operation. When thewater temperature dropped to 40℃ or below,this warning display disappears.

Prevent the water temperature fromexceeding 40℃.

4E5E －

Abnormaltemperature rangewarning

The temperature of the monitoring targetexceeded the set range.(This is not a breakdown of the chiller.)

Check the setting of warning.

RemedyCause

LC 2

Transmission troublebetween INV CPU andtemperature controlCPU

Communication error occurred between thecontrol P-board and the inverter P-board.①

P3 2 A break in a wire or short circuit occurred. Check the wiring.①

Controller boxtemperature sensorTrouble

Make sure that the communication lineto the slave is connected normally.(Thisalarm is raised only when there is noresponse from a slave in master-slavecommunication.)

Other systemtransmission trouble(Communication errorbetween master andslave)

①

U1 1 Reverse phase power/Lack phase

U2 2Instantaneousinterruption/undervoltage

Alarm

Level

U9

Water temperaturesensor trouble(TH4：Liquidtemperature sensor)

2Communication error occurred between themaster and a slave.

JH 2

Check to see that the power supplyvoltage is as per the rated voltage.Also check if a voltage sag occurs onstartup of peripheral equipment.

Power supply voltage is below 170V.①

Controll boad must be replaced.Improve the power supply condition.

A break in a wire or short circuit occurred in anwater temperature sensor necessary forcontrol.

Identify the sensor which ismalfunctioning in monitor display modeon the operation panel ("-99.9" willappear.), and check the wiring.

①

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10. Action to comply with “Fluorocarbons Recovery and 　 Destruction Law” for oil cooling units and chillers・ DAIKIN Group acts positively toward preservation of global environment.・ Through construction of DAIKIN fluorocarbons recovery, transportation and destruction system, we take 　　 quick action via nationwide network.・ Call DAIKIN Contact Center supporting 24 hours a day for inquiry and request for recovery.

“Fluorocarbons Recovery and Destruction Law” was enforced on April 1, 2002. This law (= law concerning implementation of recovery and destruction of fluorocarbons contained in specified products) aims to protect the ozone layer and prevent global warming. The users of such products are under obligation to make recovery and destruction. Specified products mentioned above are either class-1 (commercial refrigerators, air-conditioners and other relevant items) or class 2 (car air-conditioners).Oil cooling units and chillers fit into “other equipment applied to refrigerators” in class-1 products, considering the purpose and nature of the law.Therefore, this law applies, from April 1, 2002, to all kinds of oil cooling units and chillers in Japanese market, existing and newly installed, and regardless of type of refrigerant (conventional R22 and new R407C, R410A). It is necessary for users of oil cooling units and chillers to comply with the law. It should be noted that violators of this law will receive a sentence of a one-year-or-less prison or will be liable to a fine up to 500,000 yen.

Concrete description of obligations and action to be taken is shown below:○Obligations of customers (especially manufacturers of the main units and end-users)

1. It is prohibited to indiscriminately release fluorocarbons from oil cooling units and chillers (products) into the atmosphere.

2. In the event of disposal of oil cooling units and chillers (products), it is essential to commission recovery of fluorocarbons (chargeable) to class-1 recovery operators registered with local governments.

3. As of Oct. 1. 2007, an administrative guidance regarding disposal of chlorofluorocarbon (CFC) will be in effect (a guidance that defines delegation of ownership of CFC products or any kinds of delivery regarding CFC disposalmust be recorded by writings).Therefore all history of delivery must be managed by writings in order to collect all CFC, when scrapping oilcooling units. However deliveries regarding maintenance or repair are exempted.(Note) As for products (oil cooling units and chillers) already being used by end-users, there is no obligation to

attach a caution plate (label) about “Fluorocarbons Recovery and Destruction Law” stated below.○ Obligations of manufacturers of oil cooling units and chillers (DAIKIN) to the products

1. To attach a caution plate (label) about “Fluorocarbons Recovery and Destruction Law”○PR action of manufacturers of oil cooling units and chillers (DAIKIN)

1. DAIKIN includes description of “Fluorocarbons Recovery and Destruction Law” in the product specifications and catalogs of oil cooling units and chillers to do PR to the customers on obligations to comply with the law.

The general outlines of DAIKIN fluorocarbons recovery system and its overall inquiry office (DAIKIN Contact Center) are shown below.DAIKIN recovers fluorocarbons of not only its own products but also other maker’s class-1 specified products. For details, contact DAIKIN Contact Center shown below.[General outlines of DAIKIN fluorocarbons recovery and destruction system] ○ First, contact DAIKIN Contact Center.○ Our nationwide networked refrigerant recovery team (about 500 teams in DAIKIN Group) visits your site at an

inexpensive fee. Customers need not send back the product to us at high costs (for packing, loading, and transportation).○ DAIKIN takes the following steps ① - ⑥.

Customer who requests recovery

DAIKIN Contact Center

(DAIKIN overall inquiry office)

DAIKIN Service Station52 stations, about 500 teams

throughout the country

Registered fluorocarbons recovery operator

13 sites throughout the country⑥ Destruction

Registered fluorocarbons recovery operator

DAIKIN Contact Center 0120-14-9955 (toll-free number nationwide available)(24-hour/365-day service) 0120-84-1069 (toll-free number for FAX)

・ Disposal of main bodies of oil cooling units or chillers (products) after recovery of fluorocarbons shall be performed by the local users in the conventional manner. (DAIKIN does not undertake disposal of the main bodies of the products.)

・ Recovery (destruction) of fluorocarbons is chargeable. For details, contact DAIKIN Contact Center.

④ Recovery of fluorocarbons

①Request from customer (inquiry)

② Contact

⑤ Transportation

(Note)

③ Visit

DAIKIN INDUSTRIES,LTD.　Oil Hydraulics & Lubrication Div.

■OSAKA Esaka Bldg.,21-3, Tarumicho,3-chome, Suita City, Osaka, 564-0062 Japan℡06(6378)8763　ＦＡＸ.06(6378)8737

URL : http://www.daikin.co.jp

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