TECHNICAL & SERVICE MANUAL...TECHNICAL & SERVICE MANUAL SAP-KRV93EH + SAP-CRV93EH SAP-KRV123EH +...

TECHNICAL & SERVICE MANUALSAP-KRV93EH + SAP-CRV93EHSAP-KRV123EH + SAP-CRV123EH

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

SAP-CRV93EHSAP-CRV123EH

AIR CONDITIONER

IMPORTANTThese air conditioners employ newrefrigerant R410A.Pay special attention whenservicing the unit.

SAP-KRV93EHSAP-KRV123EH

FILE NO.

REFERENCE NO. SM700590W

Indoor Unit Outdoor Unit

Indoor Model No. Product Code No.SAP-KRV93EH 1 852 089 81SAP-KRV123EH 1 852 089 80

Outdoor Model No. Product Code No.SAP-CRV93EH 1 852 089 85SAP-CRV123EH 1 852 089 84

Destination: Europe

2

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and oper-ating standards. As the installer or service person, it is animportant part of your job to install or service the systemso it operates safely and efficiently.

For safe installation and trouble-free operation, youmust:● Carefully read this instruction booklet before beginning.● Follow each installation or repair step exactly as

shown.● Observe all local, state, and national electrical codes.● Pay close attention to all warning and caution notices

given in this manual.This symbol refers to a haz-ard or unsafe practice whichcan result in severe personalinjury or death.This symbol refers to a hazardor unsafe practice which canresult in personal injury orproduct or property damage.

If Necessary, Get HelpThese instructions are all you need for most installationsites and maintenance conditions. If you require help fora special problem, contact our sales/service outlet oryour certified dealer for additional instructions.

In Case of Improper InstallationThe manufacturer shall in no way be responsible forimproper installation or maintenance service, includingfailure to follow the instructions in this document.

SPECIAL PRECAUTIONS

When Wiring

ELECTRICAL SHOCK CAN CAUSESEVERE PERSONAL INJURY OR DEATH.ONLY A QUALIFIED, EXPERIENCEDELECTRICIAN SHOULD ATTEMPT TOWIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tub-ing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in thissystem. Carefully refer to the wiring diagram andthese instructions when wiring. Improper connectionsand inadequate grounding can cause accidentalinjury or death.

• Ground the unit following local electrical codes.• Connect all wiring tightly. Loose wiring may cause

overheating at connection points and a possible firehazard.

When Transporting

Be careful when picking up and moving the indoor andoutdoor units. Get a partner to help, and bend yourknees when lifting to reduce strain on your back. Sharpedges or thin aluminum fins on the air conditioner cancut your fingers.

When Installing……In a Ceiling or WallMake sure the ceiling/wall is strong enough to hold theunit’s weight. It may be necessary to construct a strongwood or metal frame to provide added support.…In a RoomProperly insulate any tubing run inside a room to prevent“sweating” that can cause dripping and water damage towalls and floors.…In Moist or Uneven LocationsUse a raised concrete pad or concrete blocks to providea solid, level foundation for the outdoor unit. This pre-vents water damage and abnormal vibration.…In an Area with High WindsSecurely anchor the outdoor unit down with bolts and ametal frame. Provide a suitable air baffle. …In a Snowy Area (for Heat Pump-type Systems)Install the outdoor unit on a raised platform that is higherthan drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing• Use the flare method for connecting tubing.• Apply refrigerant lubricant to the matching surfaces of

the flare and union tubes before connecting them,then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

When Servicing• Turn the power OFF at the main power box (mains)

before opening the unit to check or repair electricalparts and wiring.

• Keep your fingers and clothing away from any movingparts.

• Clean up the site after you finish, remembering tocheck that no metal scraps or bits of wiring have beenleft inside the unit being serviced.

Others

• Ventilate any enclosed areas when installing or testingthe refrigeration system. Escaped refrigerant gas, oncontact with fire or heat, can produce dangerouslytoxic gas.

• Confirm upon completing installation that no refriger-ant gas is leaking. If escaped gas comes in contactwith a stove, gas water heater, electric room heater orother heat source, it can produce dangerously toxicgas.

WARNING

WARNING

CAUTION

CAUTION

3

Table of Contents

Page

1. OPERATING RANGE ................................................................................................................ 4

2. SPECIFICATIONS2-1. Unit Specifications............................................................................................................ 52-2. Major Component Specifications...................................................................................... 72-3. Other Component Specifications...................................................................................... 11

3. DIMENSIONAL DATA................................................................................................................ 12

4. REFRIGERANT FLOW DIAGRAM4-1. Refrigerant Flow Diagram................................................................................................. 14

5. PERFORMANCE DATA5-1. Temperature Charts.......................................................................................................... 155-2. Air Throw Distance Charts................................................................................................ 175-3. Operating Frequency Charts ............................................................................................ 19

6. ELECTRICAL DATA6-1. Electrical Characteristics .................................................................................................. 236-2. Electric Wiring Diagrams .................................................................................................. 24

7. INSTALLATION INSTRUCTIONS7-1. Installation Site Selection ................................................................................................. 267-2. Recommended Wire Length and Diameter ...................................................................... 287-3. Remote Control Unit Installation Position......................................................................... 297-4. How to Test Run the Air Conditioner ................................................................................ 307-5. Remove the Grille to Install the Indoor Unit...................................................................... 31

8. MAINTENANCE8-1. Address Setting of the Remote Control Unit .................................................................... 328-2. Disconnecting and Connecting Positive Connector for Outdoor Unit ............................... 33

9. FUNCTIONS9-1. Operation Functions ......................................................................................................... 349-2. Protective Functions......................................................................................................... 36

10. TROUBLESHOOTING............................................................................................................... 38

11. CHECKING ELECTRICAL COMPONENTS11-1. Measurement of Insulation Resistance ............................................................................ 4311-2. Checking Continuity of Fuse on PCB Ass’y ..................................................................... 44

12. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT .............................................................. 45

INSTRUCTION MANUAL ...................................................................................... 52APPENDIX

4

1. OPERATING RANGETemperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

CoolingMaximum 32°C D.B. / 23°C W.B. 43°C D.B.Minimum 19°C D.B. / 14°C W.B. 19°C D.B.

HeatingMaximum 27°C D.B. 24°C D.B. / 18°C W.B.Minimum 16°C D.B. –20°C D.B. / –20°C W.B.

5

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:Cooling: Indoor air temperature 27°C D.B. / 19°C W.B.

Outdoor air temperature 35°C D.B. / 24°C W.B.Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 7°C D.B. / 6°C W.B.

2. SPECIFICATIONS2-1. Unit SpecificationsIndoor Unit SAP-KRV93EHOutdoor Unit SAP-CRV93EH

Power Source 220 – 240V Single-phase 50Hz

Performance Cooling HeatingCapacity kW 2.65 (0.9 – 3.2) 3.60 (0.9 – 5.0)

BTU/h 9,000 (3,100 – 10,900) 12,300 (3,100 – 17,100)Air circulation (High) m3/h 480 530Moisture removal (High) Liters/h 1.6 —

Electrical Rating Cooling HeatingAvailable voltage range V 198 – 264Running amperes A 3.86 (1.28 – 5.88) 4.81 (1.21 – 6.47)Power input W 755 (250 – 1,150) 995 (250 – 1,340)Power factor % 85 90C.O.P. W/W 3.51 3.62Compressor locked rotor amperes A 15

FeaturesControls / Temperature control Microprocessor / I.C. thermisterControl unit Wireless remote control unitTimer ON / OFF 24 hours & Daily program, 1-hour OFFFan speeds Indoor / Outdoor 3 and Auto / 1 (Hi)Airflow direction (Indoor) Horizontal Manual

Vertical AutoAir filter Washable, Anti-MoldCompressor Rotary (DC inverter)Refrigerant / Amount charged at shipment g R410A / 950Refrigerant control Electric expansion valveOperation sound Indoor: Hi / Me / Lo dB-A 34 / 31 / 28 34 / 31 / 28

Outdoor: Hi dB-A 46 47Refrigerant tubing connections Flare typeMax allowable tubing length at shipment m 7.5Refrigerant Narrow tube mm (in.) 6.35 (1/4)tube diameter Wide tube mm (in.) 9.52 (3/8)Refrigerant tube kit / Accessories Optional / Air clean filter

Voltage Rating 230V

Dimensions & Weight Indoor Unit Outdoor UnitUnit dimensions Height mm 285 548

Width mm 825 720Depth mm 189 265

Package dimensions Height mm 350 600Width mm 900 856Depth mm 255 362

Weight Net kg 9.0 34.0Shipping kg 11.0 36.0

Shipping volume m3 0.080 0.186

6

Indoor Unit SAP-KRV123EHOutdoor Unit SAP-CRV123EH


Remarks: Rating conditions are:Cooling: Indoor air temperature 27°C D.B. / 19°C W.B.

Outdoor air temperature 35°C D.B. / 24°C W.B.Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 7°C D.B. / 6°C W.B.

Power Source 220 – 240V Single-phase 50Hz

Performance Cooling HeatingCapacity kW 3.50 (0.9 – 3.8) 4.20 (0.9 – 5.8)

BTU/h 11,900 (3,100 – 13,000) 14,300 (3,100 – 19,800)Air circulation (High) m3/h 500 530Moisture removal (High) Liters/h 2.0 —

Electrical Rating Cooling HeatingAvailable voltage range V 198 – 264Running amperes A 5.21 (1.19 – 6.21) 5.48 (1.18 – 7.09)Power input W 1,090 (250 – 1,300) 1,165 (250 – 1,500)Power factor % 91 92C.O.P. W/W 3.21 3.61Compressor locked rotor amperes A 15

FeaturesControls / Temperature control Microprocessor / I.C. thermostatControl unit Wireless remote control unitTimer ON / OFF 24 hours & Daily program, 1-hour OFFFan speeds Indoor / Outdoor 3 and Auto / 1 (Hi)Airflow direction (Indoor) Horizontal Manual

Vertical AutoAir filter Washable, Anti-MoldCompressor Rotary (DC inverter)Refrigerant / Amount charged at shipment g R410A / 1,100Refrigerant control Electric expansion valveOperation sound Indoor: Hi / Me / Lo dB-A 36 / 33 / 29 34 / 31 / 29

Outdoor: Hi dB-A 47 49Refrigerant tubing connections Flare typeMax allowable tubing length at shipment m 7.5Refrigerant Narrow tube mm (in.) 6.35 (1/4)tube diameter Wide tube mm (in.) 9.52 (3/8)Refrigerant tube kit / Accessories Optional / Air clean filter

Voltage Rating 230V

Dimensions & Weight Indoor Unit Outdoor UnitUnit dimensions Height mm 285 548

Width mm 825 720Depth mm 189 265

Package dimensions Height mm 350 600Width mm 900 856Depth mm 255 362

Weight Net kg 9.0 35.0Shipping kg 11.0 37.0

Shipping volume m3 0.080 0.186

7

2-2. Major Component Specifications2-2-1. Indoor Unit

Indoor Unit SAP–KRV93EH


Control PCBPart No. CB-KRV93EH (POW-KRV93GJH)Controls MicroprocessorControl circuit fuse 250V 3.15A

Flap Motor and Louver MotorType Stepping motorModel MP24Z3-12VRating DC 12VCoil resistance (Ambient temp. 25°C) Ω Each pair of terminals: 400 ± 7%

Heat Exchanger CoilCoil Aluminum plate fin / Copper tubeRows 2Fin pitch mm 1.3Face area m2 0.188

Fan & Fan MotorType Fan / Fan motor Cross-flow / AC motorQ’ty … Dia. and length mm 1 … D92 / L634Fan motor model … Q’ty IBH-884-066 … 1No. of poles … Rough measure rpm (Cool / Heat) 4 … 1,200 / 1,250Nominal output W 30Coil resistance (Ambient temp. 20°C) Ω BRN – WHT: 234

PNK (RED) – WHT: 209— : —

Safety devices Type Thermal fuseOperating temp. Open °C 130

Close —Run capacitor µF 1.2

VAC 440

Remote Control Unit RCS-3HVPSS4E

8



Control PCBPart No. CB-KRV123EH (POW-KRV93GJH)Controls MicroprocessorControl circuit fuse 250V 3.15A

Flap Motor and Louver MotorType Stepping motorModel MP24Z3-12VRating DC 12VCoil resistance (Ambient temp. 25°C) Ω Each pair of terminals: 400 ± 7%


Fan & Fan MotorType Fan / Fan motor Cross-flow / AC motorQ’ty … Dia. and length mm 1 … D92 / L634Fan motor model … Q’ty IBH-884-066 … 1No. of poles … Rough measure rpm (Cool / Heat) 4 … 1,250 / 1,250Nominal output W 30Coil resistance (Ambient temp. 20°C) Ω BRN – WHT: 234

PNK (RED) – WHT: 209— : —


Close —Run capacitor µF 1.2

VAC 440

Remote Control Unit RCS-3HVPSS4E

9

2-2-2. Outdoor Unit

Outdoor Unit SAP–CRV93EH


CompressorType DC Rotary (Hermetic)Compressor model / Nominal output G4C090LU1ER / 600WCompressor oil … Amount cc FV50S … 320Coil resistance (Ambient temp. 20°C) Ω U – V: 0.81

V – W: 0.81W – U: 0.81

Safety devicesCT (Peak current cut-off control) YESCompressor discharge temp. control YESOperation cut-off control in abnormal ambient temp. —

Run capacitor µF —VAC —

Crankcase heater —

Fan & Fan MotorType … Fan / Fan motor Propeller / AC motorQ’ty … Dia. mm 1 … 370Fan motor model … Q’ty IB-976-501 … 1No. of poles … Rough measure rpm (Cool / Heat) 6 … 700 / 700Nominal output W 20Coil resistance (Ambient temp. 20°C) Ω WHT – BRN: 213

RED (PNK) – WHT: 168— : —


Close °C —Run capacitor on control PCB (A) µF 2.0

VAC 440


External Finish Acrylic baked-on enamel finish

Control PCB (A) / Control PCB (B)Part No. CB-CRV93EH (POW-CRV93GJH)Controls MicroprocessorControl circuit fuse 250V, 20A

10

Outdoor Unit SAP–CRV123EH


Fan & Fan MotorType … Fan / Fan Motor Propeller / DC MotorQ’ty … Dia. mm 1 … 370Fan motor model … Q’ty DAJ12-55J71-C … 1No. of poles … Rough measure rpm (Cool / Heat) 8 … 750 / 750Nominal output W 50Coil resistance (Ambient temp. 20°C) Ω —

——

Safety devices Type —Operating temp. Open °C —

Close °C —Run capacitor on control PCB (A) µF —

VAC —


External Finish Acrylic baked-on enamel finish

Control PCB (A) / Control PCB (B)Part No. CB-CRV123EH (POW-CRV123GJH)Controls MicroprocessorControl circuit fuse 250V, 20A

CompressorType DC Rotary (Hermetic)Compressor model / Nominal output G4C090LU1ER / 600WCompressor oil … Amount cc FV50S … 320Coil resistance (Ambient temp. 20°C) Ω U – V: 0.81

V – W: 0.81W – U: 0.81

Safety devicesCT (Peak current cut-off control) YESCompressor discharge temp. control YESOperation cut-off control in abnormal ambient temp. —

Run capacitor µF —VAC —

Crankcase heater —

11

2-3. Other Component Specifications

Indoor Unit SAP–KRV93EHSAP–KRV123EH

Outdoor Unit SAP–CRV93EHSAP–CRV123EH

00 10 20 30 40 50 60 70 80 90

40

60

80

100

120

140

160

180

200

20

10

1

2

3

4

5

6

7

8

9

10

15 20 25 30 35 40

• Indoor air temp sensor• Indoor heat exchanger sensor• Compressor temp sensor

Res

ista

nce

(kΩ

)

Res

ista

nce

(kΩ

)

Temperature (°C) Temperature (°C)

• Outdoor air temp sensor• Outdoor heat exchanger sensor

40

35

30

25

20

15

10

5

0 –20 –15 –10 –5 0 5 10 15 20Temperature (°C)

Res

ista

nce

(kΩ

)

12

5 5815

825

285

567

189 3

45

24.5 56815

56 79.5

4040

450187.5

178.9Wide tube ø9.52(3/8")

Drain hose ø18Narrow tube ø6.35(1/4")

187.5

178.9

86.5

86.5

45

360

(ø65)

308

187.5187.5

92.5122.570

825450

4528

540

(ø65)

24.5

40196

46.5 27.4

70

3213

3.8

52 23

3. DIM

ENSIO

NAL D

ATAIndoor U

nit SAP-KRV93EH

SAP-KRV123EH

Unit: mm

13

Outdoor Unit SAP-CRV93EHSAP-CRV123EH

720 72

Wide tube service valveø9.52 (3/8")

2-ø12 holes

Narrow tube service valveø6.35 (1/4")

548

16 109

55

1552

91

265

91

290

316

538

275

AIR DISCHARGE

(12

clas

s on

ly)

AIR INTAKE

AIR

INTA

KE

12

ID:2

-ø23

.6

ID:ø1

8

Unit: mm

14

4. REFRIGERANT FLOW DIAGRAM4-1. Refrigerant Flow DiagramIndoor Unit SAP-KRV93EH Outdoor Unit SAP-CRV93EH

SAP-CRV123EH SAP-CRV123EH

Com

pres

sor

4-wayvalve

AccumulatorWide tubeservicevalveWide tube

O.D.ø9.52 mm(3/8 ")

NarrowtubeservicevalveNarrow tube

O.D.ø6.35 mm(1/4")

Hea

t exc

hang

er

Hea

t exc

hang

er

Muffler

Capillary tube for split flow

Cooling cycle(Defrosting cycle)

Heating cycle

Indoor unit Outdoor unit

Electricexpansion

valveM

Modulator(12 class only)

Strainer Muffler(12 class only)

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both thewide and narrow tubes of this air conditioner become cold. Toprevent heat loss and wet floors due to dripping ofcondensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulationshould be a min. 8 mm.

After a tube has been insulated,never try to bend it into a narrowcurve because it can cause the tubeto break or crack.

IMPORTANT

Wide tube

Thickness:Min. 8 mm

Insulation

Narrow tube

Thickness:Min. 8 mm

IMPORTANT

CAUTION

15

5. PERFORMANCE DATA5-1. Temperature ChartsIndoor Unit SAP-KRV93EHOutdoor Unit SAP-CRV93EH

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomesextremely high in heating mode. (Refer to “9-2. Overload prevention during heating.”)● … Points of rating condition

Black dots in above charts indicate the following rating conditions.Cooling: Indoor air temperature 27°C D.B. / 19°C W.B. Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 35°C D.B. / 24°C W.B. Outdoor air temperature 7°C D.B. / 6°C W.B.

NOTE

■ Cooling Characteristics ■ Heating Characteristics

25 30 35 40

25 30 35 40

17

16

15

14

13

12

11

10

–5 0 5 10 15 20 25

3

2

8

9

6

7

4

5

–5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

Outdoor inlet air D.B. temp.( C)

Outdoor inlet air D.B. temp.( C) Outdoor inlet air D.B. temp.( C)


Ope

ratin

g cu

rren

t (A

)

Ope

ratin

g cu

rren

t (A

)

Indo

or d

isch

arge

air

tem

pera

ture

( C

)

Indo

or d

isch

arge

air

tem

pera

ture

( C

)

–5 0 5 10 15 20 25Outdoor inlet air D.B. temp.( C)

25 30 35 40

4

5

3

2

1.2(11.2)

1.3(12.2)

1.1(10.2)

1.0(9.2)

3.5(34.7)

3.0(29.6)

2.5(24.5)

2.0(19.4)

Low

pre

ssur

e at

wid

e tu

be s

ervi

ce v

alve

MP

a (k

gf/c

m2 G

)

Hig

h pr

essu

re a

t wid

e tu

be s

ervi

ce v

alve

MP

a (k

gf/c

m2 G

)

27°C

24°CIndoo

r Air Tem

p.30°C

24°C

27°CIndoor Ai

r Temp.30°

C

27°C

24°C

Indoor Air T

emp.30°C

20°C

17°C

Indoor A

ir Temp.2

3°C

20°C

17°C

Indoor Air Temp.23°C

20°C

17°C

Indoor Air Tem

p.23°C

16


Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomesextremely high in heating mode. (Refer to “9-2. Overload prevention during heating.”)● … Points of rating condition

Black dots in above charts indicate the following rating conditions.Cooling: Indoor air temperature 27°C D.B. / 19°C W.B. Heating: Indoor air temperature 20°C D.B.

Outdoor air temperature 35°C D.B. / 24°C W.B. Outdoor air temperature 7°C D.B. / 6°C W.B.

NOTE

■ Cooling Characteristics ■ Heating Characteristics

Low

pre

ssur

e at

wid

e tu

be s

ervi

ce v

alve

MP

a (k

gf/c

m2 G

)

Hig

h pr

essu

re a

t wid

e tu

be s

ervi

ce v

alve

MP

a (k

gf/c

m2 G

)




Ope

ratin

g cu

rren

t (A

)

Ope

ratin

g cu

rren

t (A

)

Indo

or d

isch

arge

air

tem

pera

ture

( C

)

Indo

or d

isch

arge

air

tem

pera

ture

( C

)

25

1.3(12.2)

1.0(9.2)

1.1(10.2)

30 35 40

1.2(11.2)

Outdoor fan speed

HighLow

25

4

6

8

9

3

2

5

7

30 35 40

Outdoor fan speed

HighLow

25

8

10

12

14

16

18

30 35 40

Outdoor fan speed

HighLow

5 0 5 10 15 20 252.0

(19.4)

2.5(24.5)

3.0(29.6)

3.5(34.7)

5 0 5

4

6

8

9

3

2

5

7

10 15 20 25

5 0 5 10

30

6 25

35

40

45

50

55

20 60

15 20 25

27°C

24°C

Indoor Air T

emp.30°C

20°C

17°CIndo

or Air Te

mp.23°C

Indoor Air Temp.2

3°C

17°C20°C

Indoor Air Temp.30°C

24°C

27°C17°C

23°C

20°C

27°C

24°C

30°C

17

5-2. Air Throw Distance Charts

Horizontal distance (m)

Axi

s ai

r vel

ocity

(m/s

)Ve

rtic

al d

ista

nce

(m)

Room air temp. : 20°CFan speed : High

Heating


Axi

s ai

r vel

ocity

(m/s

)Ve

rtic

al d

ista

nce

(m)


Cooling

1

2

3

4

1 2 3 4 5 6 7 8 9

: Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30°

1

2

3

4

1 2 3 4 5 6 7 8 9

: Flap angle 45° , : Axis air velocity 45° : Flap angle 60° , : Axis air velocity 60°


18


Axi

s ai

r vel

ocity

(m/s

)Ve

rtic

al d

ista

nce

(m)


Heating


Axi

s ai

r vel

ocity

(m/s

)Ve

rtic

al d

ista

nce

(m)


Cooling

1

2

3

4

1 2 3 4 5 6 7 8 9

: Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30°

1

2

3

4

1 2 3 4 5 6 7 8 9

: Flap angle 45° , : Axis air velocity 45° : Flap angle 60° , : Axis air velocity 60°


19

5-3. Operating Frequency Charts

0

1

2

3

4

5

0 10 20 30 40 50 60 70 80

Operating Freqency (Hz)

Coo

ling

Cap

acity

(kW

)

54

Min.

Center

Max.

0

200

400

600

800

1000

1200

0 10 20 30 40 50 60 70 80


Pow

er In

put (

W)

54

Min.

Center

Max.

755

2.65

Indoor Unit SAP–KRV93EHOutdoor Unit SAP–CRV93EH

230V Single-phase 50Hz

NOTE

1) Rating conditions in cooling are:Indoor: 27°C D.B. / 19°C W.B.Outdoor: 35°C D.B. / 24°C W.B.

2) Fan speed: High

■ Cooling

20

0

1

2

3

4

5

0 20 40 60 80 100 120


Hea

ting

Cap

acity

(kW

)

3.6

Min.

Center

Max.

75

0

200

400

600

800

1000

1200

1400

0 20 40 60 80 100 120


Pow

er In

put (

W) 995

Min.

Center

Max.

75


NOTE

1) Rating conditions in heating are:Indoor: 20°C D.B.Outdoor: 7°C D.B. / 6°C W.B.

2) Fan speed: High

■ Heating

21

0

1

2

3

4

5

0 10 20 30 40 50 60 70 80 90


Coo

ling

Cap

acity

(kW

) 3.5

Min.

CenterMax.

78

0

200

400

600

800

1000

1200

1400

0 10 20 30 40 50 60 70 80 90


Pow

er In

put (

W)

1090

Min.

Center

Max.

78

Indoor Unit SAP–KRV123EHOutdoor Unit SAP–CRV123EH


NOTE

1) Rating conditions in cooling are:Indoor: 27°C D.B. / 19°C W.B.Outdoor: 35°C D.B. / 24°C W.B.

2) Fan speed: High

■ Cooling

22

0

1

2

3

4

5

6

0 20 40 60 80 100 120


Hea

ting

Cap

acity

(kW

)

4.2

Min.

Center

Max.

81

0

200

400

600

800

1000

1200

1400

1600

0 20 40 60 80 100 120


Pow

er In

put (

W)

1165

Min.

Center

Max.

81


NOTE

1) Rating conditions in heating are:Indoor: 20°C D.B.Outdoor: 7°C D.B. / 6°C W.B.

2) Fan speed: High

■ Heating

23

6. ELECTRICAL DATA6-1. Electrical CharacteristicsIndoor Unit SAP-KRV93EHOutdoor Unit SAP-CRV93EH

Indoor Unit Outdoor Unit Complete UnitFan Motor Fan Motor Compressor

Performance at 230V Single-phase 50HzRating conditions Running amp. A 0.17

Power input kW 0.0330.21

0.048

Rating conditions: Indoor air temperature: 27°C D.B. / 19°C W.B.Outdoor air temperature: 35°C D.B.

Rating conditions: Indoor air temperature 20°C D.B. Outdoor air temperature 7°C D.B. / 6°C W.B.

Heating

Cooling

3.480.674

3.860.755




0.0484.43

0.9124.81

0.995





0.030

Rating conditions: Indoor air temperature: 27°C D.B. / 19°C W.B.Outdoor air temperature: 35°C D.B.

Rating conditions: Indoor air temperature: 20°C D.B. Outdoor air temperature: 7°C D.B. / 6°C W.B.

Heating

Cooling

4.901.025

5.211.090




0.0305.17

1.1005.48

1.165

24

6-2. Electric Wiring D

iagrams

Indoor Unit

SAP-KRV93EH

Outdoor U

nitSAP-C

RV93EH

WA

RN

ING

To avoid electrical shock hazard, be sure todisconnect pow

er before checking, servicingand/or cleaning any electrical parts.

55

44

33

22

11

44

33

22

11

22

11

66

55

44

33

22

11

66

W W W W W W

WWWWW

W

W

W

W

W W

321

33

22

11

33

22

11

11

22

RV

YE

LY

EL

BLK

BLK BL

KB

LKC

OM

PR

ES

SO

RTH

ER

MIS

TOR

FER

RIT

E C

OR

E

CO

ILTH

ER

MIS

TOR

OU

TDO

OR

THE

RM

ISTO

R

YL2

PC

ON

NE

CTO

R

OUTDOORRV1RV2

MV(BLK)

MAGNETIC COILREACTANCE

L2L1IN+IN–OUT–OUT+IN1IN2S1

CE

W

U

VT-RUN/TEST

FM FM H(WHT)

COIL/COMP(WHT)

BLK

BLK

BLU

BLU

BR

NW

HTBLU

BLU

BLU

YL3

PC

ON

NE

CTO

R

VL3

PC

ON

NE

CTO

R

BR

NW

HT

(PN

K)

RE

D

4-WAY VALVE

FM

FAN MOTOR

CA

PA

CIT

OR

W

BLU

WHT

RED

WH

TB

LU

(PN

K)

RE

D

CM

COMPRESSORMOTOR

GRN/YEL

S/U C/W

R/V

GRN/YEL

GR

N/Y

EL

BLK

WHT

RED

OR

G

BLK

WH

T

WH

T

OR

GR

ED

GR

YW

HT

YE

LB

LK

FER

RIT

EC

OR

E

TERMINALBASE

MV

RED

CONTROLLER

Outdoor Unit : SAP-CRV93EHIndoor Unit : SAP-KRV93EH

8FA-2-5257-145XX-0

YELBRNBLUPNKRED

BRN

BRN

TERMINAL BASE

PO

WE

RS

UP

PLY

BLU

EARTH

RED

GRYGRY

EVAPORATOR

54321

554433

BLKBLK

2 21 1

4 43 3

2211

CONTROLLERTHERMISTOR

(ROOM)

THERMISTOR(COIL)

8FA-2-5257-143XX-1

FLAPLAMP

9P(WHT)

IND

LA

MP

AS

SY

FAN5P(WHT)

FLAP5P(WHT)

POWERRELAY

RY01

HALL IC3P(WHT)

FMC1

FMC24P(WHT)

ROOM/COIL4P(WHT)

BLKREDWHT

(RED)PNK

22YEL

BLU

GRN/YEL

FAN MOTORCAPACITOR

FAN MOTOR

FLAP MOTOR

PNK

33

11

553311

321

54

WHTWHTWHT

5544332211

7766

5 5WHTWHT

WHT

4 43 3

RED2 21 1

7 76 6

9988WHT

WHT9 98 8

BLK(ORG)BLK(ORG)

1234

BRN

FM

HAJEM-A

1

2

4

L

N

4 AC IN SI1 SI

3

GR

N/Y

EL

GRN/YEL

GRN/YEL

1

2

4

Meaning of Abbre viation s ABB REV. MEANING

1 BLK BLACK

2 BLU BLUE

3 BRN BROWN

4 GRN/YEL GREEN/YELLOW

5 GRY GREY

6 ORG ORANGE

7 PNK PINK

8 RED RED

9 VLT VIOLET

10 WHT WHITE

11 YEL YELLOW

25

Indoor Unit

SAP-KRV123EH

Outdoor U

nitSAP-C

RV123EH

WA

RN

ING

To avoid electrical shock hazard, be sure todisconnect pow

er before checking, servicingand/or cleaning any electrical parts.

55

44

33

22

11

44

33

22

11

22

11

66

55

44

33

22

11

66

W W W W W W

WW

W

W

W

W

W W

321

33

22

11

11

22

RV

YE

LY

EL

BLK

BLK BL

KB

LKC

OM

PR

ES

SO

RTH

ER

MIS

TOR

FER

RIT

E C

OR

E

CO

ILTH

ER

MIS

TOR

OU

TDO

OR

THE

RM

ISTO

R

YL2

PC

ON

NE

CTO

R

OUTDOORRV1RV2

MV(BLK)

MAGNETIC COILREACTANCE

L2L1IN+IN–OUT–OUT+IN1IN2S1

E

W

U

VT-RUN/TEST

(WHT)COIL/COMP

(WHT)

BLK

BLK

BLU

BLU

BLU

BLU

VL3

PC

ON

NE

CTO

R

4-WAY VALVE

W

BLU

WHT

RED

WH

TB

LU

(PN

K)

RE

D

CM

COMPRESSORMOTOR

GRN/YEL

S/U C/W

R/V

GRN/YEL

GR

N/Y

EL

BLK

WHT

RED

OR

G

BLK

WH

T

WH

T

OR

GR

ED

GR

YW

HT

YE

LB

LK

FER

RIT

EC

OR

E

TERMINALBASE

MV

8FA-2-5257-146XX-0

YELBRNBLUPNKRED

BRN

BRN

TERMINAL BASE

PO

WE

RS

UP

PLY

BLU

EARTH

RED

GRYGRY

EVAPORATOR

54321

554433

BLKBLK

2 21 1

4 43 3

2211

CONTROLLERTHERMISTOR

(ROOM)

THERMISTOR(COIL)

8FA-2-5257-143XX-1

FLAPLAMP

9P(WHT)

IND

LA

MP

AS

SY

FAN5P(WHT)

FLAP5P(WHT)

POWERRELAY

RY01

HALL IC3P(WHT)

FMC1

FMC24P(WHT)

ROOM/COIL4P(WHT)

BLKREDWHT

(RED)PNK

22YEL

BLU

GRN/YEL

FAN MOTORCAPACITOR

FAN MOTOR

FLAP MOTOR

PNK

33

11

553311

321

54

WHTWHTWHT

5544332211

7766

5 5WHTWHT

WHT

4 43 3

RED2 21 1

7 76 6

9988WHT

WHT9 98 8

BLK(ORG)BLK(ORG)

1234

BRN

FM

HAJEM-A

1

2

4

L

N

4 AC IN SI1 SI

3

GR

N/Y

EL

GRN/YEL

GRN/YEL

1

2

4

66

77

55

44

33

22

11

DCFM(WHT)

WH

T

RE

DB

LU YE

L

BLK

FM

FAN MOTOR

GRN/YEL

CONTROLLER

Outdoor Unit : SAP-CRV123EHIndoor Unit : SAP-KRV123EH

Meaning of Abbre viation s ABBREV. MEANING

1 BLK BLACK

2 BLU BLUE

3 BRN BROWN

4 GRN/YEL GREEN/YELLOW

5 GRY GREY

6 ORG ORANGE

7 PNK PINK

8 RED RED

9 VLT VIOLET

10 WHT WHITE

11 YEL YELLOW

26

7. INSTALLATION INSTRUCTIONS7-1. Installation Site Selection7-1-1. Indoor Unit

AVOID:● direct sunlight.

● nearby heat sources that may affect performance ofthe unit.

● areas where leakage of flammable gas may beexpected.

● places where large amounts of oil mist exist.

DO:● select an appropriate position from which every cor-

ner of the room can be uniformly cooled. (High on awall is best.)

● select a location that will hold the weight of the unit.

● select a location where tubing and drain hose havethe shortest run to the outside. (Fig. 1)

● allow room for operation and maintenance as well asunrestricted air flow around the unit. (Fig. 2)

● install the unit within the maximum elevation differ-ence (H) above or below the outdoor unit and withina total tubing length (L) from the outdoor unit asdetailed in Table 1 and Fig. 3.

● Install the indoor unit more than 1 meter away from anyantenna or power lines or connecting wires used fortelevision, radio, telephone, security system, or inter-com. Electrical noise from any of these sources mayaffect operation.

Table 1

5 cmmin.

5 cmmin.

15 cm min.

Front View

Fig. 1

INDOORUNIT

Tubing length (L)

OUTDOORUNIT

Elevationdifference (H)

Fig. 2

WARNING To prevent abnormal heatgeneration and the possibilityof fire, do not place obstacles,enclosures and grilles in frontof or surrounding the air con-ditioner in a way that mayblock air flow.

Indoor unit

Floor level

Wall

Minimum height from floor level

1.5 m

Fig. 3

For stable operation ofthe air conditioner, do notinstall wall-mounted typeindoor units less than 1.5 m from floor level.

CAUTION

Max. Allowable Tubing Limit of Tubing Limit of Elevation Required Amount of Model Length at Shipment Length (L) Difference (H) Additional Refrigerant

(m) (m) (m) (g/m) *

KRV93 / 123 7.5 15 7 15

* If total tubing length becomes 7.5 to 15 m (max.), charge additional refrigerant (R410A) by 15 g/m.No additional compressor oil is necessary.

27

7-1-2. Outdoor UnitAVOID:● heat sources, exhaust fans, etc. (Fig. 4)● damp, humid or uneven locations.

DO:● choose a place as cool as possible.● choose a place that is well ventilated.● allow enough room around the unit for air intake/

exhaust and possible maintenance. (Fig. 5a)● provide a solid base (level concrete pad, concrete

block, 10 × 40 cm beams or equal), a minimum of10 cm above ground level to reduce humidity andprotect the unit against possible water damageand decreased service life. (Fig. 5a)

● Install cushion rubber under unit’s feet to reducevibration and noise. (Fig. 5b)

● use lug bolts or equal to bolt down unit, reducingvibration and noise.

● Install in a location where no antenna of a televi-sion or radio exists within 3 meters.

Outdoor unit

Hot airHeat source

Exhaust fanNO

Fig. 4

Air intake

Concreteor equal

About 10 cm

Min. 10 cm

Anchor bolts(4 pcs.)

About 40 cm

Fig. 5a

Cushion rubber

Fig. 5b

Air intake Min. 10 cm

Air dischargeMin.5 cm Min.40 cm

ValvesideMin. 25 cm

Min.2 m

Min.2 m

Ground

Obs

tacl

e

Obstacle above

Air

disc

harg

e

28

7-2. Recommended Wire Length and DiameterRegulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to yourlocal electrical codes. Carefully observe these regulations when carrying out the installation.Table 2 lists recommended wire lengths and diameters for power supply systems.

Refer to the wiring system diagram (Fig. 6) for the meaning of “A”, “B” and “C” in Table 2.

Table 2

NOTE

INDOOR UNIT OUTDOOR UNIT

TERMINALTERMINAL (B)

(A)

(C)

GROUNDING LINE

Power supply:Single-phase 220 – 240VAC 50Hz

1

4

2

1

4

2

L

N

Fig. 6

CAUTION Be sure to connect the powersupply line to the indoor unitas shown in the wiring dia-gram. The outdoor unit drawsits power from the indoor unit.

WIRING SYSTEM DIAGRAMWARNING ● Be sure to comply with local

codes on running the wirefrom the indoor unit to theoutdoor unit (size of wireand wiring method, etc.).

● Each wire must be firmlyconnected.

● No wire should be allowedto touch refrigerant tubing,the compressor, or anymoving part.

● To avoid the risk of electrical shock, each airconditioner unit must be grounded.

● For the installation of a grounding device,please observe local electrical codes.

● Grounding is necessary, especially for unitsusing inverter circuits, in order to releasecharged electricity and electrical noise causedby high tension. Otherwise, electrical shockmay occur.

● Place a dedicated ground more than 2 metersaway from other grounds and do not have itshared with other electric appliances.

WARNING

Cross-Sectional (A)+(B) (A) Power Supply Wiring Length (m) (C) ControlFuse or Circuit Area (mm 2) (B) Power Line Length (m) Line Length (m)

Model 2 3.5 0.75Breaker Capacity

CRV93 60 100 16010A

CRV123 60 100 160

29

7-3-1. Mounting on a Wall

Before mounting theremote control unit, pressthe ON/OFF operationbutton at the mountinglocation to make sure thatthe air conditioner oper-ates from that location.The indoor unit shouldmake a beeping sound toindicate that it hasreceived the signal.

7-3. Remote Control Unit Installation PositionThe remote control unit can be operated from either a non-fixed position or a wall-mounted position.

To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places:

● In direct sunlight

● Behind a curtain or other place where it is covered

● More than 8 m away from the air conditioner

● In the path of the air conditioner’s airstream

● Where it may become extremely hot or cold

● Where it may be subject to electrical or magnetic interference

● Where there is an obstacle between the remote control unit and the air conditioner (since a check signal issent from the remote control unit every 5 minutes)

Hole

Remote control unit mount

Mounting screws 4 × 16 (included)

Rear side

Press

Set in place To prevent loss of the remote control

unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole.

To take out the remote control unit, pull it forward.

Fig. 7

30

7-4. How to Test Run the Air ConditionerAfter turning on power to the air conditioner, use the remotecontroller and follow the steps below to conduct the test run.

(1) Set the remote controller in Test Run mode. (Fig. 8a)

a) Press and hold the QUIET button.

b) Then press and hold the 1HR TIMER button.

c) At the same time, press the ACL (reset) button once.Use a pointed object such as the tip of a pen to pressthe ACL button.

• After a few seconds, “ ” appears and “oP-1” blinks inthe remote controller display area. (Fig. 8b)

d) Release the 1HR TIMER button.

e) Release the QUIET button.

(2) Start Cooling mode test run by pressing the ON/OFFoperation button of the remote controller. (Fig. 8a)

• This starts the fan producing uncooled forced air withthe 3 indicator lamps (OPERATION lamp, TIMER lampand QUIET lamp) on the main unit blinking. (Fig. 8c)

• After 3 minutes, the system shifts into cooling opera-tion, and cool air will start to be felt. Cool mode testrun is unaffected by the room temperature.

(3) Press the ON/OFF operation button of the remote con-troller again to stop the test run. (Fig. 8a)

(4) Finally press the ACL (reset) button of the remote con-troller to release it from Test Run mode to return to nor-mal mode. (Fig. 8a)

• “ ” and “oP-1” will disappear from the remote con-troller display area.

After the test run is completed, be sure to press the ACL(reset) button to return to normal mode. The air conditionerwill not operate correctly if this is not done.

IMPORTANT

Fig. 8a

Fig. 8b

Fig. 8c

1HR.TIMER

ON/OFF operation

ACL(Reset)

QUIET

button

button

buttonbutton

OPERATION lampTIMER lampQUIET lamp

31

7-5. Remove the Grille to Install theIndoor Unit

Basically, these models can be installed and wiredwithout removing the grille. If access to any internalpart is needed, follow the steps as given below.

How to remove the grille

(1) Grasp both ends of the air intake grille, and removeit by opening towards the front and pulling towardsyou. (Fig. 9a)

(2) Remove the 2 screws. (Fig. 9b)

(3) Remove the screw on the right side cover plateand open the cover. (Fig. 10a)

(4) Take out the thermistor from the grille. (Fig. 10b)

(5) Pull the lower part of the grille toward you toremove. (Fig. 11a)

(6) Use a standard screwdriver to push on the tabs toremove the grille.

How to replace the grille

(1) Reinstall the grille into the lower part while aligningits tabs on the upper part. (Fig. 11b) Insert the tabsin the slots and push the lower part of the grilleback into position.

(2) Make sure that the grille and frame are firmly fittedtogether by engaging the tabs.

(3) Attach the thermistor on the grille. (Fig. 10a)

(4) Close the cover and replace the screw. (Fig. 10a)

(5) Affix the grille with the 2 previously removedscrews. (Fig. 9b)

(6) Install the air intake grille.

(a) Allow the edge of the air intake grille to slide intothe top of the indoor unit, and then insert it all theway inside. (Fig. 12a)

(b) Press the bottom right and left corners of the airintake grille to attach it to the indoor unit. (Fig. 12b)

Screw cover

Air intake grille Grille

Fig. 9a

Fig. 9b

CoverThermistor

Fig. 10a

Thermistor

Fig. 10b

Fig. 11a

Grille

Frame

Tab

Tab

**

Fig. 11b

**

Fig. 12b Fig. 12a

Pin

Groove

CAUTION Be sure to wear work gloves duringinstallation to avoid being cut by thesharp aluminum fins of the heatexchanger.

32

8. MAINTENANCE8-1. Address Setting of the Remote

Control UnitThe address can be set in order to prevent interfer-ence between remote controllers when two Sanyoindoor units are installed near each other. The addressis normally set to “A.” To set a different address, it isnecessary to change the address on the secondremote controller.

Once changed, you cannot restore the originaladdress setting of the air conditioner.

(1) Switch on the power source.

(2) Break the address-setting tab marked “A” on thesecond remote controller to change the address(Fig. 13). When the tab is removed, the address isautomatically set to B (Fig. 14).

(3) Press and hold the remote controller QUIET but-ton and 1 HR TIMER button. At the same time,press the ACL (reset) button. Use a thin objectsuch as the tip of a pen to press the ACL button.When this has been done, “oP-1” (test run)appears, blinking, in the remote controller clockdisplay area.

(4) Each time the 1 HR TIMER button is pressed, thedisplay changes as shown below. Press this but-ton 2 times to change the display to “oP-7”(address setting). (Fig. 15)

(5) “oP-7” has now been selected for address setting.

(6) Press the ON/OFF operation button on the remotecontroller. (Fig. 15) Check that the “beep” signal-received sound is heard from the second indoorunit (approximately 5 times). The sound you hearis the signal that the remote controller addresshas been changed.

(7) Finally press the remote controller ACL (reset)button to cancel the blinking “oP-7” display. (Fig. 15)

Changing of the second remote controller address isnow completed.

Test run mode

Self-diagnostic mode

Address setting mode

NOTE

Fig. 13

Fig. 14

Fig. 15

Tab

ACL button

ON•/OFF•

1HR.

UIET

MODE

TEMP.

TIMER

CANCEL

SENSORADR ACL

24H12HF

CLOCK

NIGHT SETBACKFAN SPEED

HIGH POWERFLAP

AIR CONDITIONER

1HR.TIMER

ON/OFF operation

ACL(Reset)

QUIETbutton

button

button

button

33

8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit

One of the two types of connectors illustrated at left is used. Theirbasic structure is the same for each.

How to Disconnect

Hold the resin connector cover, and pull the connector off.You cannot disconnect the connector by pulling the wire sinceit is locked inside. Always hold the cover to disconnect. (Seeillustration at left.) For the connector without the resin cover,push the lock in the direction of “2” while pulling it off.

How to Connect

In order to connect, hold the resin cover of the connector andpush it in. Confirm the click sound for the inside lock.

Pull the cover upward

When the cover is pulled upward, the lock is released with the sequence of 1 and 2.

34

9. FUNCTIONS9-1. Operation Functions

■ Emergency operation ■ SENSOR DRY

■ AUTO cooling/heating operation

● Selecting the operation mode

During DRY operation, the system adjusts the room temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment.

SENSOR DRY operation• DRY operation is as shown in the figure below.

■ PAM-α control• In order to further improve inverter performance, control is

switched between PWM control at low operation speeds, and PAM control at high operation speeds, making the most effective use of power.

The compressor operation frequency varies.The indoor fan operates with 1/f fluctuation.

The compressor operates at a low operating frequency.The indoor fan operates with 1/f fluctuation.

• Monitoring operation takes place when the room temperature is below 15°C, or more than 3°C below the set temperature.

• When the monitoring range is entered, the compressor stops, and the indoor fan operates with 1/f fluctuation.

DRY A

DRY B

Monitor

Conditions are monitored at all times when the room temperature is below 15°C.

Load

COOL zone

A zone

B zone

Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used.

• The set temperature is 2°C below the detected room temperature in the case of cooling operation, and 2°C above the room temperature in the case of heating operation. The flap and fan speed settings are AUTO.

(GREEN) (RED) (Lamp Off)COOL HEAT STOP

• When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and the room temperature, and automatically switches to Cooling or Heating mode.

• As shown by the example in the figure below, with AUTO cooling/heating operation, the mode changes between Heating and Cooling mode according to changes in the relationship between the current room temperature and the set temperature.

Room temp. ≥ Set temp. COOLRoom temp. ≤ Set temp. HEAT

23

Zone A

Zone B

Zone CZone C

Zone B

Zone A

OFF OFFCompressor

Operation mode

Room temp.

HeatingCooling Cooling

ON ON ON

More than1 hour

Within1 hour

Set temp.

ExampleExample of operation in AUTO mode with the set room temperature at 23°C.

To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display. Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation. Select the desired type of operation.

35

■ HIGH POWER

This function acts to raise the power but keeps the AC system in the same operating mode.This function is set with the HIGH POWER button on the remote controller.(It can be set regardless of the temperature and fan speed settings.)

● HIGH POWER operation from remote controllerThe unit operates at maximum output for 30 minutes, regardless of the desired temperature.The fan speed is 1 step above “High.”

■ Lamp colorsOPERATION lamp

■ NIGHT SETBACK

NOTE• When HIGH POWER operation ends, the unit operates at low

Hz for 5 minutes, regardless of the thermostat OFF conditions.• When in DRY mode, operation is in the cooling zone.

■ Timer backup

• Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation.

Frequency

MAX

0

Start End

Time30 min. 5 min.

• When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep.

• When NIGHT SETBACK operation is set, “ mark” appears on the remote controller. The main unit display lamp also becomes dimmer.

● COOL and DRY modes• The indoor unit fan speed is automatically lowered for quiet

operation.• The temperature setting is raised by 1°C 30 minutes after

NIGHT SETBACK operation is set. This repeats again after another 30 minutes have passed to gradually raise the temperature.

● HEAT mode• The indoor unit and outdoor unit fan speeds are

automatically lowered for quiet operation.• The temperature setting is lowered by 2°C 30 minutes after

NIGHT SETBACK operation is set. This repeats again after another 30 minutes have passed to gradually lower the temperature.

TIMER lamp GreenQUIET lamp Green

HEAT operation RedDRY operation OrangeCOOL operation Green

36

■ Overload prevention during heating

9-2. Protective Functions

During HEAT operation, the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated.

■ Cold-air prevention during heating

■ Compressor discharge temperature control

During heating, the fan speed is set to “LL” (very low) or stopped.As the temperature of the indoor heat exchanger rises, the fan speed is changed to the set speed.

■ Freeze preventionDuring COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below.1 Freeze-prevention operation is engaged when the

temperature of the indoor heat exchanger is below 6°C.2 Restart after freeze-prevention operation occurs when the

temperature of the indoor heat exchanger reaches 8°C or above.

a Area: Automatic capacity controlb When Point A has been exceeded, the operation frequency is

reduced by a certain proportion.c Area: Frequency increase is prohibited.d At Point B and below, overload prevention is ended and

control is the same as in the a area.

a Area: Automatic capacity controlb When the temperature drops below Point A, the operation

frequency is reduced by a certain proportion.c Area: Frequency increase is prohibited.d When the temperature reaches Point C or above, freezing

prevention is ended and control is the same as in the a area.

* When the temperature drops to below 2°C (continuously for 2 minutes or longer), the compressor stops.Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off.

Approx.53 Normal operation

At start of operation

A High

LL

Stopped

A

*

B

C

B

Indoor heat exchangerA. Control startB. Control end

Set fan speed

25 30 Approx. 40

a b c d

a b c d

Indo

or h

eat e

xcha

nger

tem

pera

ture

(°C)

Indoor heat exchangertemperature (°C)

Indo

or h

eat e

xcha

nger

tem

pera

ture

(°C)

Approx.47

2

6

8

NOTE• The fan speed is forcibly changed to “LL” beginning 30 seconds

after the thermostat turns OFF.• Normal operation refers to operation when the room

temperature has approached the set temperature.• When HEAT operation starts, the indoor fan is stopped until the

temperature of the indoor heat exchanger reaches 20°C or higher, or until the room temperature reaches 15°C or higher.

This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature.

a Area: Automatic capacity control.b When the temperature rises above Point A, the operation

frequency is reduced at a specified rate.c Area: Further frequency increase is prohibited.d When the temperature falls below Point B, prevention of a rise

in frequency is released and the air conditioner operates as in a area.

* The compressor will stop if the temperature of the compressor discharge exceeds 120°C due to shortage of gas or other reason.

Approx.101

A

B

a b c d

Compressor discharge temperature (°C)

Approx.94

37

Heating operation

Frost sensing

Reverse-cycle defrosting operation

Defrosting Sequence

Releasing of defrosting

●

●

•

•

Outdoor fan ON4-way valve ON

●

●

Outdoor heating exchanger temp. is over 14°C.Defrosting operation lasts 12 minutes (maximum).2 minutes after it is stopped, compressor is ON.4-way valve is ON. Outdoor fan is ON.

If the air conditioner is turned off during the defrosting cycle, it will continue defrosting and turn itself off after defrosting is completed.

●

●

●

●

●

Compressor ➞ 1 minute after it is stopped, compressor is ON. Outdoor fan ➞ OFF Indoor fan ➞ OFF4-way valve ➞ OFFOperation lamp ➞

● Reverse-Cycle Defrosting

NOTE

■ Defrost detection and release

• This function prevents the circuit breaker or fuse from operating to open the circuit. This function works when electrical current has increased due to an increase in the cooling / heating load, or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted auto-matically to control the electrical current for operation.

• When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode.

Electrical current setting for COOL operation is used during DEFROST operation.

Cooling • Dry Heating

Peak current cut-off trips 12.0Hz down 8.5 8.5

NOTE

(A)SAP-KRV93, KRV123

■ CT (Peak current cut-off control)

Repeatedly switches between red and orange illumination.

Defrost detection occurs in either of the following cases:

The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation.

Outdoor heat exchanger temp.

Ambient temp.0

L1L2

Frosting area

The temperature of the heat exchanger remains at or below the L1 line for 3 minutes after the start of HEAT operation.

38

10. TROUBLESHOOTING

■ Precautions before performing inspection or repair

NOTE

Executing self-diagnostics

● After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.

● High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 310 V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be careful not to touch any electrified parts before the controller LED (red) turns OFF.If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.

1: If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, there is an external ROM (OTP data) failure on the indoor circuit board, or a ROM socket insertion problem, or the ROM has not been installed.

2: The failure mode is stored in memory even when the power is not ON. Follow the procedure below to perform diagnostics.

■ Method of self-diagnosticsFollow the procedure below to perform detailed trouble diagnostics.

ON EI/OFF E

1HR.

UIET

MODE

TEMP.

TIMER

CANCEL

SENSORADR ACL

24H12HF

CLOCK

NIGHT SETBACKFAN SPEED

HIGH POWERFLAP

AIR CONDITIONER

1HR.TIMERbutton

ON/OFF operationbutton

ACL(Reset)button

QUIETbutton

< Clock display >

Test run mode

Self-diagnostics mode

Step 1: Press and hold the remote controller QUIET button and 1 HR TIMER button. At the same time, press the ACL (reset) button. Use a pointed object such as the tip of a pen to press the ACL button.When this has been done, “oP-1” (test run) appears, blinking, in the remote controller clock display area.

Step 2: Next, press the 1 HR TIMER button once to change the display from “oP-1” to “oP-3” (self-diagnostics). (The display continues to blink.)

Step 3: Finally press the ON/OFF button to engage self-diagnostics mode.

• The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) Self-diagnostics is completed when the buzzer sounds 3 short beeps.

• A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again.

• The 3 lamps remain OFF if no trouble has occurred.

After self-diagnostics is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done.

After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics.

39

Self-diagnostics Lamps

Indication on indoor unit .... OFFTimer Operation Code Diagnostics item Diagnostics contents

S01 Room temperature sensor failure 1 Sensor open circuit or short circuit2 Contact failure at connector or open circuit at terminal crimping location (short-circuit

detection only for the humidity sensor)3 Indoor/outdoor circuit board failure

1 Sensor open circuit or short circuit2 Contact failure at connector or open circuit at terminal crimping location3 Outdoor circuit board failure

1 External ROM data failure 2 Outdoor circuit board failure

1 Outdoor circuit board failure 2 Outdoor power supply voltage failure

1 4-way valve failure (heat pump model only)2 Outdoor circuit board failure

1 Service valve not opened. 2 Shortage of refrigerant

1 Open phase 2 Outdoor circuit board failure

1 Mis-wiring 2 AC power failure 3 Blown fuse 4 Power relay failure 5 Indoor or outdoor circuit board failure

1 Electric expansion valve failure 2 Capillaries choked 3 Shortage of refrigerant4 Continuous overload operation 5 Outdoor fan does not rotate 6 Outdoor circuit board failure

1 Mis-wiring 2 Blown fuse 3 Power relay failure 4 Open phase 5 Outdoor circuit board failure 6 Compressor failure

1 Instantaneous power outage 2 HIC or power transistor failure 3 Outdoor circuit board failure

1 Fan motor failure 2 Contact failure at connector 3 Outdoor circuit board failure

1 Indoor fan system failure 2 Shortage of refrigerant 3 Low-temperature operation

1 Fan motor failure 2 Contact failure at connector 3 Indoor circuit board failure

1 HIC or power Tr failure 2 Outdoor fan does not turn. 3 Instantaneous power outage 4 Service valve not opened. 5 Outdoor fan blocked. 6 Continuous overload operation 7 Compressor failure 8 Outdoor circuit board failure

Indoor heat exchanger sensor failure

Humidity sensor failure

Compressor temperature sensor failure

Outdoor heat exchanger sensor failure

Outdoor air temperature sensor failure

Indoor/outdoor communications failure (serial communications)

Outdoor unit external ROM (OTP data) failure

Peak current cut-off

• HIC circuit failure• Power Tr (transistor) circuit failure

• PAM circuit failure• Active circuit failure

• Outdoor system communications failure• Outdoor high-pressure SW• OLR operation• Outdoor power supply open phase• Outdoor coil freezing

Compressor discharge overheat prevention activated.

Indoor fan operating failure

No-refrigerant protection

DC compressor drive circuit failure

Outdoor fan operating failure

Freeze-prevention operation activated.

• 4-way valve switching failure• Indoor zero-cross failure

Outdoor electrical current detection failure Outdoor circuit board failure

S02

S03

S04

S05

S06

S07

E01

E02

E03

E04

E05

E06

E07

E08

E09

E10

E11

E12

E13

.... Blinking .... ON (Illuminated)Quiet

(3) (2) (1)

Since the indications cover various units, corresponding parts listed below may not bepresent in some models.

OPERATION

OPERATION

TIMERQUIET

(1) OPERATION lamp(2) TIMER lamp(3) QUIET lamp

Self-diagnostics lamps

40

■ If self-diagnostics function fails to operate

■ Checking the indoor unit

■ Checking the outdoor unit

■ Checking serial communications

Check the indoor unit.

Is the fuse blown?

ControlNo. Check items (unit operation)

Replace the controller.Replace the circuitboard or the fuse.

• No indicators illuminate and the indoor fan does not rotate.

• Check the power voltage.

Use the remote controller to operate the unit in “TEST run” mode. To determine whether the mode is currently in “TEST run” mode, check the 3 indicator lamps on the unit. If all 3 are blinking, the current mode is “TEST run.”

● If there are no problems with the above, then check the outdoor unit.● For the “Test run” procedure, refer to 7.4 “How to Test Run the Air Conditioner.”

1 • The rated voltage must be present between inter-unit cables 1 and 2.• Connect a 5 kΩ resistor between inter-unit cables 2 and 4. When the

voltage at both ends is measured, approximately 12–15 V DC must be output and the multimeter pointer must bounce once every 8 seconds.Or instead of measuring the voltage, you can insert an LED jig and check that the LED flickers once every 8 seconds.

ControlNo. Check items (unit operation)

Short-circuit terminals 2 and 4 on the indoor unit terminal base.

Initial self-diagnostics Probable location of malfunction

Short-circuit terminals 2 and 4 on the indoor unit terminal base.

Apply the rated voltage between outdoor unit terminals 1 and 2.

● If there are no problems with the above, then check the indoor unit.

● Turn the power OFF before performing short circuiting procedures.● Refer to the previous pages when performing system self-diagnostics.● So that the check can be made quickly, indicators blink at first communication after power ON.● Before performing the above checks, perform “TEST run” operation, and check that the rated voltage is output to terminals 1 and 2 on

the outdoor unit. If it is not output, there is a failure related to the indoor unit power.

1 • The control panel LED (red) must illuminate.

Short-circuit the outdoor unit COM terminal to the T-RUN terminal.

2 • The compressor, fan motor, and 4-way valve must all turn ON.

Normal

Blown

→ Control 1

No change Indoor unit circuit board failure

Outdoor unit circuit board failure

Failure (open circuit, contact failure, etc.) in the inter-unit wiring

Outdoor unit circuit board failure

Change: (1) and (3) illuminate, and (2) blinks.

(1) illuminates



Change: (1) illuminates

(1) and (3) illuminate,and blinks.

→ Control 2

● Using the TEST/T-RUN terminals

T-RUN : Test run (compressor and fan motor turn ON).TEST/MV : Compresses time to 1/60th (accelerates

operation by 60 times faster than normal).

TEST/T-RUN terminals

(TEST)/MV T-RUN COM

41

.....Applied for only SAP-CRV123 outdoor unit● This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil

resistance, and the following procedure should be used to check the motor.● To perform diagnosis, follow the instructions in “Checking the Outdoor Unit” on the previous page and set the

outdoor unit to Test Run mode (compressor ON, outdoor fan motor ON).Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors.

(B) When performing voltage measurement at the outdoor controller connector for (3) in the tablebelow, the DC motor will trip and voltage output will stop approximately 10 seconds afteroperation is started. For this reason, to measure the voltage again, first turn OFF the outdoorunit power, then follow the instructions in “Checking the Outdoor Unit” and again set the unitto Test Run mode.

[Trouble symptom 1] The fan does not stop when the outdoor unit stops. → Outdoor unit controller trouble

[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.(Diagnostic procedure)

* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoorunit controller (3 locations).

Measurement location Normal value(1) Vs-Gnd: Between pin 1 and pin 4 DC 230 V or more(2) Vcc-Gnd: Between pin 5 and pin 4 DC 14 V or more(3) Vsp-Gnd: Between pin 7 and pin 4 After fluctuating 4 times between DC 1.0 – 4.3 V

(1 sec. ON) and DC 0 V (1 sec. OFF), the DCmotor trips.

(Diagnostic results)All of the above measured values are normal. → Fan motor trouble (Replace the motor.)Any one of the above measured values is not normal. → Outdoor unit controller trouble

(Replace the controller .)(Reference) DC motor connector pin arrangement

Pin 1: Vs (white)Pin 2: Not usedPin 3: Not usedPin 4: Gnd (black)Pin 5: Vcc (red)Pin 6: FG (blue)Pin 7: Vsp (yellow)

[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoorunit operates.(There is trouble in the system that provides feedback of motor rotation speed from themotor to the outdoor unit controller.)

[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.

[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.

(Remedy for symptom 3 to 5)It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.

42

An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur. Please pay attention to the points listed below.

■ Noise malfunctionThis refers to the application of high-frequency noise to the signal wires, resulting in abnormal signal pulses and malfunction.

Locations most susceptible to noise

1. Locations near broadcast stations where there are strong electromagnetic waves

2. Locations near amateur radio (short wave) stations

3. Locations near electronic sewing machines and arc-welding machines

Correction

(The fundamental concept is to make the system less susceptible to noise.)

— Insulate for noise ordistance from the noise source. —

1. Use shielded wires.2. Move unit away from the noise source.

Trouble

Either of the following trouble may occur.1. The unit may stop suddenly during

operation.2. Indicator lamps may flicker.

■ Electromagnetic interferenceThis refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby.

Locations most susceptible to noise

1. A television or radio is located near the A/C and A/C wiring.

2. The antenna cable for a television or radio is located close to the A/C and A/C wiring.

3. Locations where television and radio signals are weak.

Correction

1. Select a separate power source.2. Keep the A/C and A/C wiring at least 1 meter

away from wireless devices and antenna cables.3. Change the wireless device’s antenna to a high-

sensitivity antenna.4. Change the antenna cable to a BS coaxial cable.5. Use a noise filter (for the wireless device).6. Use a signal booster.

Trouble

1. Noise appears in the television picture, or the picture is distorted.

2. Static occurs in the radio sound.

43

11-1. Measurement of InsulationResistance

● The insulation is in good condition if the resistanceexceeds 1MΩ.

11-1-1. Power supply cordClamp the grounding wire of power cord with the leadclip of the insulation resistance tester and measurethe resistance by placing a probe on either of the twopower wires. (Fig. 1)

Then also measure the resistance between thegrounding and other power terminals. (Fig. 1)

11-1-2. Indoor unitClamp an aluminum plate fin or copper tube with thelead clip of the insulation resistance tester and mea-sure the resistance by placing a probe on each termi-nal screw where power supply lines are connected onthe terminal plate. (Fig. 2)

11-1-3. Outdoor unitClamp an aluminum plate fin or copper tube with thelead clip of the insulation resistance tester and mea-sure the resistance by placing a probe on each termi-nal screw on the terminal plate. (Fig. 2)

Note that the ground line terminal should be skippedfor the check.

11-1-4. Measurement of insulation resistance for electrical parts

Disconnect the lead wires of the desired electric partfrom terminal plate, capacitor, etc. Similarly discon-nect the connector. Then measure the insulationresistance. (Figs. 3 and 4)

Refer to Electric Wiring Diagram.

If the probe cannot enter the poles because the holeis too narrow then use a probe with a thinner pin.

NOTE

Insulation tester

Probe

Clip

Ground wire

Fig. 1

Terminal plate

Coppertube ormetallic part

Clip

Insulation tester

Probe

Fig. 2

Coppertube ormetallic part

Clip

Insulation tester

Probe

Fig. 3

Clip

Insulation tester

ProbeMetallic part

From fan motor,compressor and other parts

Fig. 4

11. CHECKING ELECTRICAL COMPONENTS

44

11-2. Checking Continuity of Fuseon PCB Ass’y

● Remove the PCB Ass’y from the electrical compo-nent box. Then pull out the fuse from the PCBAss’y. (Fig. 5)

● Check for continuity using a multimeter as shownin Fig. 6.

Fuse

PCB Ass’y

Fig. 5

Fuse

Fig. 6

45

12. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

12-1. Characteristics of New Refrigerant R410A12-1-1. What is New Refrigerant R410A?R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Itsrefrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.

12-1-2. Components (mixing proportions)HFC32 (50%) / HFC125 (50%)

12-1-3. Characteristics● Less toxic, more chemically stable refrigerant

● The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, whenthere is a refrigerant leak the basic performance of the air conditioner may be degraded because of a changein composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover theremaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specifiedamount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).

● When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquidphase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant isin gaseous state. Thus, always charge the refrigerant while it is in liquid phase.

12-2. Checklist Before ServicingUse a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differbetween these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amountof extrusion) by using the flare spacer.

● Size of flare

CAUTION Ether-type oil is used for compressor oil for R410A-type units, which is differentfrom the mineral oil used for R22. Thus more attention to moisture prevention andfaster replacement work compared with conventional models are required.

Diameter of tube (ø) DA Specification

Flare tool for R410A Conventional flare tool (for R22)ø6.35 (1/4") 0 – 0.5 mm 1.0 – 1.5 mmø9.52 (3/8") 0 – 0.5 mm 1.0 – 1.5 mm

A

øD

Flare tool for R410A

A

1.2

øD

Conventional flare tool (R22)

Spacer

46

● Tubing precautions

Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarilycover the ends of the tubing with caps or tape prior to installation.

Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditionerswith R410A are subject to higher pressure than those using R22 and R407C.

● No addition of compressor oil for R410ANo additional charge of compressor oil is permitted.

● No use of refrigerant other than R410ANever use a refrigerant other than R410A.

● If refrigerant R410A is exposed to fireThrough welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, besure to provide ample ventilation during installation work.

● Caution in case of R410A leakCheck for possible leak points with the special leak detector for R410A. If a leak occurs inside the room, imme-diately provide thorough ventilation.

47

12-3. Tools Specifically for R410A● For servicing, use the following tools for R410A

● To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, sizes of the serviceports and flare nuts of the narrow tube service valve and wide tube service valve have been altered.

12-4. Tubing Installation ProceduresWhen the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing.

The following is the HAB oil generally used:

Esso: ZERICE S32

For details on tubing installation procedures, refer to the installation manuals attached to theindoor unit and outdoor unit.

NOTE

Tool Distinction Tool Name● Gauge manifold

● Charging hose

● Gas leak detector

● Refrigerant cylinder

● Charging cylinder

● Refrigerant recovery unit

● Vacuum pump with anti-reverse flow (*1)(Solenoid valve-installed type, which prevents oil from flowing back into theunit when the power is off, is recommended.)

● Vacuum pump (*2) … can be used if the following adapter is attached.● Vacuum pump adapter (reverse-flow prevention adapter) (*3).

(Solenoid valve-installed adapter attached to a conventional vacuum pump.)

● Electronic scale for charging refrigerant

● Flare tool

● Bender

● Torque wrench

● Cutter, reamer

● Welding machine, nitrogen gas cylinder

Tools specifically for R410A

Tools which can be com-monly used for R22,R407C, and R410A

CAUTION ● The above tools specifically for R410A must not be used for R22 and R407C.Doing so will cause malfunction of the unit.

● For the above vacuum pump ( *1, *2) and vacuum pump adapter ( *3), those forR22-type units can be used for R407C-type. However, they must be used exclu-sively for R410A and never alternately with R22 and R407C.

48

12-5. In Case of Compressor Malfunction

12-5-1. Procedure for replacing compressor(1) Recovering refrigerant

● Any remaining refrigerant inside the unit should not bereleased to the atmosphere, but recovered using therefrigerant recovery unit for R410A.

● Do not reuse the recovered refrigerant, since it willcontain impurities.

(2) Replacing Compressor

● Soon after removing seals of both discharge and suc-tion tubes of the new compressor, replace it quickly.

(3) Checking for sealing

● Use nitrogen gas for the pressurized gas, and neveruse a refrigerant other than R410A. Also do not useoxygen or any flammable gas.

(4) Evacuation

● Use a solenoid valve-installed vacuum pump sothat even if power is cut off in the middle of evacuationof air due to a power interruption, the valve will pre-vent the pump oil from flowing back.

● The equipment may be damaged if moisture remainsin the tubing, thus carry out the evacuation thoroughly.

● When using a vacuum pump with exhaust air volumemore than 25L/min. and ultimate vacuum pressurerate of 0.05Torr:

Standard time for evacuation

CAUTION ● Should the compressor malfunction, be sure to make the switch to a replacementcompressor as quickly as possible.

● Use only the tools indicated exclusively for R410A. ➞ See “12-3. ToolsSpecifically for R410A.”

(1) Recover refrigerant

OK

(2) Replace compressor

OK

(3) Check for sealing

OK

(4) Evacuation

OK

(5) Recharge

Length of tubing Less than 10 meters More than 10 metersTime More than 10 minutes More than 15 minutes

49

(5) Recharging

● Be sure to charge the specified amount ofrefrigerant in liquid state using the service portof the wide tube service valve. The properamount is listed on the unit's nameplate.

When the entire amount cannot be charged all atonce, charge gradually while operating the unitin Cooling Operation.

● When charging with a refrigerant cylinder, usean electronic scale for charging refrigerant. Inthis case, if the volume of refrigerant in the cylin-der becomes less than 20% of the fully-chargedamount, the composition of the refrigerant startsto change. Thus, do not use the refrigerant ifthe amount in the charging cylinder is lessthan 20%.

Also, charge the minimum necessary amount tothe charging cylinder before using it to chargethe air conditioning unit.

Example:In case of charging refrigerant to a unit requiring0.76Kg using a capacity of a 10Kg cylinder, theminimum necessary amount for the cylinder is:

0.76 + 10 × 0.20 = 2.76Kg

For the remaining refrigerant, refer to theinstructions of the refrigerant manufacturer.

● If using a charging cylinder, transfer the speci-fied amount of liquid refrigerant from the refriger-ant cylinder to the charging cylinder.

Prepare an evacuated charging cylinder before-hand.

Do not use the refrigerant if the amount inthe charging cylinder is less than 20%.

CAUTION Never charge a large amountof liquid refrigerant at once tothe unit. This may cause dam-age to the compressor.

CAUTION ● To prevent the compositionof R410A from changing,never bleed the refrigerantgas into the atmospherewhile transferring the refrig-erant. (Fig. 3)

Valve

Single valveCharge liquid refrigerant with cylinder in up-side-down position.

Liquid

Fig. 1

Valve

Single valve (with siphon tube)Charge with cylinder in normal position.

Liquid

Fig. 2

Chargingcylinder

Open Refrigerantcylinder

Liquid

NO!

Fig. 3

Configuration and characteristics of cylinders

50

12-6. In Case Refrigerant is Leaking

(1) Detecting Leaks

● Use the detector for R410A to locate refrigerant leakpoints.

(2) Recovering refrigerant

● Never release the gas to the atmosphere; recoverresidual refrigerant using the refrigerant recovery unitfor R410A, instead.

● Do not reuse the recovered refrigerant because itscomposition will have been altered.

(3) Welding leaking points

● Confirm again that no residual refrigerant exists in theunit before starting welding.

● Weld securely using flux and wax for R410A.

● Prevent oxide film from forming inside the tubes utiliz-ing substitution with nitrogen (N2) in the refrigerantcircuit of the unit. Leave ends of tubes open duringwelding.

(4) Checking for sealing

● Use nitrogen gas for the pressurized gas, and neveruse a refrigerant other than R410A. Also do not useoxygen or any flammable gas.

(5) Evacuation

● Use a solenoid valve-installed vacuum pump sothat even if power is cut off in the middle of evacuationof air due to a power interruption, the valve will preventthe pump oil from flowing back.

● The equipment may be damaged if moisture remainsin the tubing

TECHNICAL & SERVICE MANUAL...TECHNICAL & SERVICE MANUAL SAP-KRV93EH + SAP-CRV93EH SAP-KRV123EH +...

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