Mitsubishi PUHZ-P100VHA(1), PUHZ-P125VHA(1), PUHZ-P140VHA(1) Service Manual

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Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-P100VHA

[Service Ref.]

PUHZ-P100VHA.UK PUHZ-P100VHA1.UK

PUHZ-P125VHA

PUHZ-P125VHA.UK PUHZ-P125VHA1.UK

PUHZ-P140VHA

PUHZ-P140VHA.UK PUHZ-P140VHA1.UK

December 2006

No.OC359

REVISED EDITION-B

Revision:

•

PUHZ-P100/125/140VHA1.UK

are

added in REVISED

EDITION-B.

• Some descriptions have been modified.

• Please void OC359 REVISED EDITION-A.

Note:

• This manual describes only service data of the outdoor units.

• RoHS compliant products have <G> mark on the spec name plate.

• For servicing of RoHS compliant products, refer to the RoHS Parts List.

PUHZ-P100VHA.UK PUHZ-P100VHA

1.UK

CONTENTS

1. TECHNICAL CHANGES·································2

2. REFERENCE MANUAL··································2

3. SAFETY PRECAUTION··································3

4. FEATURES ·····················································6

5. SPECIFICATIONS···········································7

6. DATA·······························································8

7. OUTLINES AND DIMENSIONS ····················11

8. WIRING DIAGRAM·······································13

9. WIRING SPECIFICATIONS··························15

10.

REFRIGERANT SYSTEM DIAGRAM

11. TROUBLESHOOTING···································22

12. FUNCTION SETTING····································72

13. EASY MAINTENANCE FUNCTION··············78

14.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

15. DISASSEMBLY PROCEDURE ·····················91

16. PARTS LIST················································101

17. RoHS PARTS LIST ·····································107

··············20

············81

Page 2

Model name Service Ref.

Service

Manual No.

PLA-RP50/60/71AA

PLA-RP100/125/140AA2

PLA-RP50/60/71AA.UK

OC335

OC357

PLA-RP100/125/140AA2.UK

PCA-RP71/125HA

OC329

PCA-RP71/125HA

PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA

OC328

PCA-RP50GA2 PCA-RP50GA2

PKA-RP50GAL PKA-RP50GAL

OC330

PSA-RP71/100/125/140GA PSA-RP71/100/125/140GA

OC332

PKA-RP60/71/100FAL PKA-RP60/71/100FAL PKA-RP50FAL2 PKA-RP50FAL2

OC331

PEAD-RP60/71/100GA

PEAD-RP60/71/100GA.UK

HWE05060

PEAD-RP50/60/71/125/140EA PEAD-RP100EA2

PEAD-RP50/60/71/125/140EA.UK PEAD-RP100EA2.UK

HWE05210

2-2.TECHNICAL DATA BOOK

Manual No. OCS06

TECHNICAL CHANGES

PUHZ-P100VHA.UK ➔ PUHZ-P100VHA1.UK

PUHZ-P125VHA.UK ➔ PUHZ-P125VHA PUHZ-P140VHA.UK ➔ PUHZ-P140VHA

1. NOISE FILTER CIRCUIT BOARD(N.F.) has been changed.

2. ACTIVE FILTER MODULE (ACTM) has been changed.

3.52C Relay (52C) and rush current protect resister (RS) are mounted to the NOISE FILTER CIRCUIT BOARD(N.F.).

1.UK

REFERENCE MANUAL

2-1. INDOOR UNIT’S SERVICE MANUAL

Page 3

3 SAFETY PRECAUTION

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

In case of using the existing pipes for R22, be careful with the followings.

· Be sure to clean the pipes and make sure that the insides of the pipes are clean.

· Change flare nut to the one provided with this product. Use a newly flared pipe.

· Avoid using thin pipes.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Keep the tools with care.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

If dirt, dust or moisture enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enter, that can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

3-1. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

[1] Cautions for service

(1) Perform service after collecting the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Page 4

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

Page 5

(2) Cautions for refrigerant piping work

1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

0.8

1.0

—

0.8

1.0

Nominal

dimensions

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22 1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22 1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A

w36.0mm for

indoor unit of RP100, 125 and 140

R22

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve Vacuum pump

Flare tool

Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale

Vacuum gauge or thermistor vacuum gauge and vacuum valve Charging cylinder

Air purge and refrigerant charge Operation check and the two above Gas leak check Collection of refrigerant Refrigerant charge Apply to flared section

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes Charge refrigerant Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refrigerant to thermistor vacuum gauge) Charge refrigerant

Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Ester oil and alkylbenzene oil (minimum amount) Tool exclusive for R410A

Tool exclusive for R410A Tools for other refrigerants can

be used if equipped with adopter for reverse flow check Tools for other refrigerants

can be used by adjusting flaring dimension Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used

Tool exclusive for R410A

Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.) : Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm or below.)

2Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,

R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refriger-

ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2” and 5/8”, the dimension B changes. Use torque wrench corresponding to each dimension.

Dimension A

3Tools for R410A (The following table shows whether conventional tools can be used or not.)

Dimension B

Page 6

4 FEATURES

PUHZ-P125VHA.UK PUHZ-P125VHA PUHZ-P140VHA.UK

PUHZ-P140VHA1.UK PUHZ-P100VHA.UK PUHZ-P100VHA1.UK

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m(PUHZ-P125/P140))

The refrigerant circuit with LEV(Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

1.UK

Page 7

5 SPECIFICATIONS

A A

/min(CFM

)

dB mm(in.) mm(in.) mm(in.)

kg(lbs) kg(lbs)

L mm(in.) mm(in.)

Power supply (phase, cycle, voltage)

Running current

Max. current External finish Refrigerant control Compressor

Model

Motor output

Starter type

Protection devices

Crankcase heater Heat exchanger Fan Fan(drive) o No.

Fan motor output

Airflow Defrost method Noise level

Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

Mode

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

Service Ref.

PUHZ-P100VHA.UK PUHZ-P100VHA

1.UK

Cooling

12.26

TNB220FLDM

Propeller fan o 1

0.060

60(2120)

50 54

943(37-1/8)

75(165)

2.7(6.0)

0.87(MEL56)

Max. 50m

Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

2.3

Line start

—

Plate fin coil

Reverse cycle

950(37-3/8)

330+30(13+1-3/16)

R410A

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m

Heating

12.62

HP switch

Discharge thermo

Single, 50Hz, 230V

OUTDOOR UNIT

REFRIGERANT PIPING

A A

/min(CFM

)

dB mm(in.) mm(in.) mm(in.)

kg(lbs) kg(lbs)

L mm(in.) mm(in.)

Power supply (phase, cycle, voltage)

Running current

Max. current External finish Refrigerant control Compressor

Model

Motor output

Starter type

Protection devices Crankcase heater

Heat exchanger Fan Fan(drive) o No.

Fan motor output

Airflow Defrost method Noise level

Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

Mode

Cooling

Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

Service Ref.

PUHZ-P140VHA.UK

PUHZ-P140VHA

1.UK

PUHZ-P125VHA.UK

PUHZ-P125VHA1.UK

Cooling

17.37 Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

Line start

—

Plate fin coil

Propeller fan o 2

0.060+0.060 100(3,530)

Reverse cycle

950(37-3/8)

330+30(13+1-3/16)

1,350(53-1/8)

123(271)

R410A

4.5(9.9)

1.40(MEL56)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 50m

Heating

16.74

Cooling

22.48

29.5

2.9

Heating

21.31

HP switch

Discharge thermo

Single 50Hz, 230V

OUTDOOR UNIT

REFRIGERANT PIPING

2.5

ANV33FDDMT

52 56

51 55

Page 8

6 DATA

Piping length (one way)

10m

20m

30m

40m

50m

Factory

charged

2.6

4.3

2.7

4.4

3.3

4.5

3.9

5.1

4.5

5.7

2.7

4.5

Service Ref.

PUHZ-P100VHA.UK PUHZ-P100VHA

1.UK

PUHZ-P125VHA.UK PUHZ-P125VHA

1.UK

PUHZ-P140VHA.UK PUHZ-P140VHA

1.UK

U-V U-W W-V

Unit

Compressor model

Winding

Resistance

( " )

ANV33FDDMT

(at 20°C)

0.266

PUHZ-P125,140VHA.UK PUHZ-P125,140VHA1.UK

TNB220FLDM

0.88

PUHZ-P100VHA.UK PUHZ-P100VHA1.UK

6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

Longer pipe than 20 or 30m, additional charge is required.

6-2. COMPRESSOR TECHNICAL DATA

Page 9

6-3. NOISE CRITERION CURVES

1.5m

MICROPHONE

UNIT

GROUND

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

PUHZ-P100VHA.UK PUHZ-P100VHA

1.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-P125VHA.UK PUHZ-P125VHA

1.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-P140VHA.UK PUHZ-P140VHA

1.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

Page 10

6-4. STANDARD OPERATION DATA

TotalElectrical circuitRefrigerant circuitIndoor side

Outdoor

side

Representative matching

SHF

Mode

Capacity Input

Phase , Hz Volts Input Amperes

Outdoor unit

Phase , Hz Volts Current Discharge pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

V A

MPa

(Of/F)

MPa

(Of/F)

°C °C °C

°C °C °C °C °C

Indoor unit

D.B.

W.B.

D.B. D.B.

W.B.

PLA-RP100AA2 PLA-RP125AA2 PLA-RP140AA2

Cooling

9,400

3.12

Heating

11,200

3.28

Cooling

12,300

4.09

Heating

14,000

4.11

Cooling

13,600

5.21

Heating

16,000

4.98

12.26

2.84

(29.0)

0.94 (9.6)

79.3

47.9

15.4 5

27 19

13.5

35 24

0.80

0.06

12.62

2.34

(23.9)

0.61 (6.2)

68.5

40.1

-2.3 5

20 15

42.5 7 6

— —

17.37

2.68

(27.3)

0.86 (8.8)

69.5

45.6

7.7 5

27 19

12.3 35 24

0.75

0.05

16.74

2.56

(26.1)

0.66 (6.7)

70.6

43.9

-0.2 5

20 15

45.5 7 6

— —

22.48

2.79

(28.5)

0.79 (8.1)

73.7

47.2

5.0 5

27 19

11.4 35 24

0.72

0.05

21.31

2.75

(28.1)

0.64 (6.5)

86.7

46.7

-0.9 5

20 15

49.6 7 6

— —

1 , 50

230

0.18

0.92

1 , 50

230

1 , 50

230

0.18

0.92

1 , 50

230

1 , 50

230

0.18

0.92

1 , 50

230

PUHZ-P100VHA PUHZ-P125VHA PUHZ-P140VHA

The unit of pressure has been changed to MPa based on international SI system. The conversion factor is : 1(MPa)=10.2(kgf/ff)

Page 11

7 OUTLINES AND DIMENSIONS

417

66 42

(19)37028

175600175

330

2-12o36 oval holes

(Foundation Bolt M10)

Air Discharge

Rear Air Intake

Side Air Intake

2-U Shaped notched holes

(Foundfation Bolt M10)

Installation Feet

,,,,

,,,

Over

Less than

Piping and wiring connections

can be made from 4 directions:

FRONT,Right,Rear and Below.

4 PIPING-WIRING DIRECTIONS

3 FOUNDATION BOLTS2 SERVICE SPACE

1 FREE SPACE (Around the unit)

Piping Knock-Out Hole Details

Example of Notes

···Refrigerant GAS pipe connction (FLARE){15.88(5/8F)

···Refrigerant LIQUID pipe connection (FLARE){ 9.52(3/8F) w1 ···Indication of STOP VALVE connection location.

r 1

r 5

The diagram below shows a

basic example.

Explantion of particular details are

given in the installation manuals etc.

r 1

r 10

FREE

Over10

500

Over100

Dimensions of space needed

for service access are

shown in the below diagram.

Service space

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

Handle for moving

Side Air Intake

Front piping cover

Rear piping cover

14522030 145

81 219

145

Drain hole

(5-{33)

Bottom piping hole

(Knock-Out)

Air Intake

Rear Air Intake

Handle for moving

943

473

950

322

w 1 447 w 1 443

670

Terminal Connections

Left···Power supply wiring

Reight···Indoor/Outdoor wiring

Earth terminal

Service panel

Handle for moving

19 55

23 27 92

4075

73 63

Right piping hole

(Knock-Out)

Right trunking hole

(Knock-Out)

Power supply wiring hole

(2-{27Knock-Out)

{

27 55

732363

Front piping hole

(Knock-Out)

Front trunking hole

(Knock-Out)

Power supply wiring hole

(2-{27Knock-Out)

{

4045

27 55 23 73 63

Rear piping hole

(Knock-Out)

Rear trunking hole

(Knock-Out)

Power supply wiring hole

(2-{27Knock-Out)

{

FOUNDATION

OUTDOOR UNIT PUHZ-P100VHA.UK PUHZ-P100VHA1.UK

Unit : mm

Page 12

Less than

Over

Handle for moving

Side Air Intake

Front piping cover

Rear piping cover

Air intake

Rear Air Intake

Handle for moving

Terminal connection

Left···Power supply wiring

Right···Indoor/Outdoor wiring

Earth terminal

Service panel

Handle for moving

The diagram below shows a

basic example.

Explantion of particular details are

given in the installation manuals etc.

Dimensions of space needed

for service access are

shown in the below diagram.

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

Air Discharge

Rear Air Intake

Side Air Intake

···Refrigerant GAS pipe connction (FLARE){15.88(5/8F)

···Refrigerant LIQUID pipe connection (FLARE){ 9.52(3/8F)

w1 ···Indication of STOP VALVE connection location.

Example of Notes

Piping Knock-Out Hole Details

1 FREE SPACE (Around the unit)

2 SERVICE SPACE

3 FOUNDATION BOLTS

4 PIPING-WIRING DIRECTIONS

Piping and wiring connections

can be made from 4 directions:

FRONT,Right,Rear and Below.

ver10

00m

ver 150m

ver 10m

FREE

FOUNDATION

150

500

Service space

600175 175

330

417

42 66

53 56

(19)28 370

2-U Shaped notched holes

(Foundation Bolt M10)

2-12 x 36 Oval holes

(Foundation Bolt M10)

Installation Feet

45 40

27 55

23 73 63

Rear piping hole

(Knock-Out)

Rear trunking hole

(Knock-Out)

Power supply wiring hole

(2-

{

27Knock-Out)

{

19 55

75 40

73 63 23 2792

Right piping hole

(Knock-Out)

Right trunking hole

(Knock-Out)

Power supply wiring hole

(2-

{

27Knock-Out)

{

4540

27 55

73 63

Front piping hole

(Knock-Out)

Front trunking hole

(Knock-Out)

Power supply wiring hole

(2-

{

27Knock-Out)

{

14514522030 145

81 219

Bottom piping hole

(Knock-Out)

Drain hole

(5-{33)

1350

950

1076

w 1 447

w 1 443

371 635

322

Handle for moving

PUHZ-P125VHA.UK PUHZ-P125VHA

1.UK

PUHZ-P140VHA.UK PUHZ-P140VHA

1.UK

Unit : mm

Page 13

8 WIRING DIAGRAM

CY2

CY1

CY1, CY2

Capacitor

T6.3AL250V

PUHZ-P100VHA.UK PUHZ-P125VHA.UK PUHZ-P140VHA.UK

Page 14

PUHZ-P100VHA1.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

Page 15

9 WIRING SPECIFICATIONS

1 2

S1 S2 S3

Indoor/outdoor unit connection cable

Indoor unit

Unit power supply

Outdoor unit

Remote controller

B Earth leakage breaker C wiring circuit breaker or

isolating switch

B Earth leakage breaker C wiring circuit breaker or

isolating switch

L N

1 2

Indoor unit

S2 S3

S1 S2 S3

Unit power supply

Indoor/outdoor unit connection cable

Indoor unit

Outdoor unit

Remote controller

B Earth leakage breaker C wiring circuit breaker or

isolating switch

1 2

S1 S2 S3

Indoor/outdoor connection cable

Indoor unit

Unit power supply

Indoor unit

Outdoor unit

Remote controller

L N

9-1. FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model Outdoor unit power supply

Outdoor unit input capacity *1 Main switch (Breaker)

Outdoor unit power supply

)

Outdoor unit power supply earth Indoor unit-Outdoor unit *2

Wiring

Indoor unit-Outdoor unit earth *2

Wire No. o

size (mm

Remote controller-Indoor unit *3 Outdoor unit L-N (single) Outdoor unit L1-N, L2-N, L3-N (3 phase) Indoor unit-Outdoor unit S1-S2 *4 Indoor unit-Outdoor unit S2-S3 *4

Circuit rating

Remote controller-Indoor unit *4

*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV). *2. Refer to 9-3. *3. The 10 m wire is attached in the remote controller accessory. *4. The figures are NOT always against the ground.

S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. P ower supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

230V

Single phase

P100, 125V P140V

~/N (single), 50 Hz, ~/N (single), 50 Hz,

230 V 230 V

32 A 40 A

2 o Min. 4 2 o Min. 6 1 o Min. 4 1 o Min. 6

3 o 1.5 (Polar) 3 o 1.5 (Polar)

1 o Min. 1.5 1 o Min. 1.5

2 o 0.3 (Non-polar) 2 o 0.3 (Non-polar)

AC 230 V AC 230 V AC 230 V AC 230 V

DC 24 V DC 24 V DC 12 V DC 12 V

A-Control

Outdoor Unit

Isolator

3 poles isolator

A-Control

Indoor Unit

Warning: In case of A-control wiring, there is high v oltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type .

1:1 system Synchronized twin and triple system Electrical wiring

• Synchronized twin

• Synchronized triple

Page 16

The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System

* The optional indoor power supply terminal kit is required.

S1 S2

L N

1 2

L N

S1 S2 S3

1 2

L N

S1 S2 S3

1 2

L N

S1 S2 S3

JBC

GGHG

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

A Outdoor unit power supply B Earth leakage breaker C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cords F Remote controller G Indoor unit H Option J

A B C D E F G H J

Indoor unit power supply

* The optional indoor power supply terminal kits are required.

Simultaneous twin/triple system

If the indoor and outdoor units have separate power supplies, refer to the table below. If the optional indoor power supply terminal kit is used, change the indoor unit electrical box wiring refering to the figure in the right and the DIP switch settings of the outdoor unit control board.

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Outdoor unit power supply Earth leakage breaker Wiring circuit breaker or isolating switch Outdoor unit Indoor unit/outdoor unit connecting cords Remote controller Indoor unit Option Indoor unit power supply

Indoor power supply terminal kit (option) Indoor unit electrical box connector connection change Label affixed near each wiring diagram for the indoor and outdoor units Outdoor unit DIP switch settings (when using separate indoor unit/outdoor unit power supplies only)

Indoor unit specifications

Required Required

Required

*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV). *2. Max. 120 m *3.The 10 m wire is attached in the remote controller accessory. Max. 500 m *4.The figures are NOT always against the ground.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

Indoor unit model Indoor unit power supply Indoor unit input capacity

Main switch (Breaker)

Indoor unit power supply Indoor unit power supply earth Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth Remote controller-Indoor unit *3

Indoor unit L-N *4

Indoor unit-Outdoor unit S1-S2 *4 Indoor unit-Outdoor unit S2-S3 *4 Remote controller-Indoor unit *4

RP35~140

~/N (single), 50 Hz, 230 V

16 A

2 o Min. 1.5 1 o Min. 1.5 2 o Min. 0.3

–

2 o 0.3 (Non-polar)

AC 230 V

– DC24 V DC12 V

Circuit

rating

Wiring

Wire No. o size

(mm

)

Electric heater (For models with heater)

Connectors (connections when shipped from the factory are for indoor unit power supplied from outdoor unit)

Indoor unit power supplied from outdoor unit (when shipped from factory)

If the indoor and outdoor units have separate power supplies, change the connections of the connectors as shown in the following figure.

Connectors

Indoor unit

control board

Separate indoor unit/outdoor unit power supplies

Electric heater (For models with heater)

Indoor unit

control board

* There are three types of labels (labels A, B, and C). Affix the appropriate labels to

the units according to the wiring method.

Set the SW8-3 to ON.

;

9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

JEB

S1 S2 S3

L N

S1 S2 S3

BLUE

ON OFF 1 2

(SW8)

L N

S1 S2 S3

BLUE

YELLOW

ORANGE

CND

S1 S2 S3

YELLOW

BLUE

YELLOW

BLUE

CND

ORANGE CND

Page 17

9-3. INDOOR – OUTDOOR CONNECTING CABLE

w The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.

Indoor unit-Outdoor unit

Outdoor power supply

Max. 45m

3 o 1.5 (polar)

1 o Min. 1.5

Max. 50m

3 o 2.5 (polar)

1 o Min. 2.5

Max. 80m

3 o 2.5 (polar) and S3 separated

1 o Min. 2.5

Indoor unit-Outdoor unit earth

Wire No. o Size (E)

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections). Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point. (If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

Indoor unit-Outdoor unit

Indoor/Outdoor separate power supply

Max. 120m

2 o Min. 0.3

—

Indoor unit-Outdoor unit earth

Wire No. o Size (E)

w The optional indoor power supply terminal kit is necessary

✽1 : In case that cable with stripe of yellow and green is available. ✽2 : In case that the flat cables are connected as this picture, they can be used up to 80m.

✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm

✽4 : In case of regular polarity connection (S1-S2-S3) ✽5 : Mentioned cable length is just a reference value.

It may be different depending on the condition of installation, humidity or materials, etc.

The cable length may vary depending on the condition of installation, humidity or materials, etc.

The cable shall not be lighter than design 60245 IEC or 60227 IEC.

Cross section

of cable

Round

2.5

1.5

2.5

(50)

✽1

(45)

✽3

60 ✽4

Not

applicable

✽2

Flat

Round

Wire size

(mm

)

Number of wires

Clockwise : S1-S2-S3

Clockwise : S1-S2-S3-Open Connect S1 and S3 to the opposite angle

Not applicable (Because center wire has no cover finish)

From left to right : S1-Open-S2-S3

Polarity L(m) ✽5

(3C Flat cable ✕ 2)

S1 S2 S3

Page 18

9-4. M-NET WIRING METHOD

Group remote controller

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

Power supply unit for transmission wire

Central remote controller

M-NET transmission wire

✕ Bad example (Multi spot grounding of shield wire)

Good example 1 (Single spot grounding of shield wire)

Power supply appliance

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Good example 2 (Single spot grounding of shield wire)

(Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to V power supply. If it is connected,

electronic parts on M-NET P.C. board may be burn out.

(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction.

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise.

“Ed” error will appear on the LED display of outdoor unit. “0403” error will appear on the central-control remote controller.

If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground

wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among grounding spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire do not form one circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the

installation manual.

Page 19

M-NET Address No.

Switng setting

SW11 ones digit

SW12 tens digit

OFF

Refrigerant address

OFF

System controller

A-control remote controller

Group A Group B Group C

A-control remote controller

TB5

A-control remote controller

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 01

M-NET address 03

Refrigerant address 00

M-NET address 04

Power supply unit for transmission wire

A-control remote controller

TB5

Group A Group B

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

System controller

Power supply unit for transmission wire

● M-NET wiring

(1) Use 2-core x 1.25mm

shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block.Connect one core of the

transmission wire (non-polar) to Aterminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(A, B, S) on M-NET terminal block should be individually wired to the other

M-NET terminal block

ABS

Transmission

wire

Ground wire

Shield part

outdoor unit’s terminal, i.e. Ato A, B to B and S to S.In this case, choose one of those outdoor units and drive a screw to fix an ground wire on the plate as shown on the right figure.

9-4-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to Free Combo system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in Free Combo system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches (SW11 for ones digit and SW12 for tens digit), which is located on the M-NET board of outdoor unit. (Factory setting: all addresses are set to “0”.)

9-4-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group setting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Factory setting: all switches are OFF. (All refrigerant addresses are “00”.)]

9-4-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

w Refrigerant addresses can be overlapped if they are in the different group.

w In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the group for the outdoor unit whose refrigerant address is “00”.

Page 20

Service port (check)

Accumulator

Compressor

Refrigerant GAS pipe

15.88A({5/8")

Refrigerant LIQUID pipe

9.52A({3/8")

4-way valve

Service port (check)

High pressure protect switch

Liner expansion valve

Muffler

Thermistor (TH4)

Refrigerant flow in cooling Refrigerant flow in heating

Ball valve

(#50)

Strainer

(#100)

Strainer (#100)

Strainer

(#100)

Stop valve

(with service port)

Strainer (#40)

Thermistor (TH3)

Capillary tube ([4.0o[3.0-L200)o2

Thermistor (TH6)

Distributor

10 REFRIGERANT SYSTEM DIAGRAM

PUHZ-P100VHA.UK PUHZ-P100VHA

Refrigerant GAS pipe

15.88A({5/8")

Refrigerant LIQUID pipe

9.52A({3/8")

1.UK

Ball valve

(#50)

Strainer

Service port (check)

Accumulator

Strainer (#40)

Stop valve (with service port)

Bypass valve

4-way valve

Muffler

Compressor

Service port (check)

Thermistor (TH4)

Refrigerant flow in cooling Refrigerant flow in heating

High pressure protect switch

Outdoor heat exchanger

(#100)

Strainer

Liner expansion valve

(#100)

Strainer

Unit : mm

Thermistor (TH6)

Thermistor (TH3)

Distributor

PUHZ-P125VHA.UK PUHZ-P125VHA1.UK PUHZ-P140VHA.UK PUHZ-P140VHA1.UK

Page 21

1. Refrigerant collecting (pump down)

OFF

<SW4>

A Stop C operation B Cooling D Heating

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1Turn on the power supply (circuit breaker).

wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If

“CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

2After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor

(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit. wSet the SWP switch (push-button type) to ON in order to perform refrigerant collecting operation only when the unit is

stopped. However, refrigerant collecting operation cannot be performed until compressor stops even if the unit is stopped. Wait three minutes until compressor stops and set the SWP switch to ON again.

3Because the unit automatically stops in about two to three minutes after the refrigerant collecting operation (LED1 is not lit

and LED2 is lit), be sure to quickly close the gas stop valve. wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then

repeat step 2 three minutes later.

wIf the refrigerant collecting operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain

stopped until the power supply is turned off.

4Turn off the power supply (circuit breaker.)

2. Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation mode (cooling/heating) can be set up.

1Set the operation mode (cooling/heating) using SW4-2. 2Turn on SW4-1 to start test run with the operation mode set by SW4-2. 3Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor starts operating. But this is not a problem with product because the check valve itself generates the sound because pressure difference is small in the refrigerant circuit.

Note: The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1, change the operation mode and restart the test run by SW4-1.)

Page 22

11 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “11-4. Self-diagnosis action table”.

Conduct trouble shooting and ascertain the cause of the inferior phenomenon according to “11-5. Troubleshooting by inferior phenomena”.

The inferior phenomenon is not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the inferior phenomenon occurred, matters related to wiring and etc. 2Reset error code logs and restart the unit after finishing service. 3There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

1Re-check the abnormal symptom. 2Conduct trouble shooting and ascertain the cause of the

inferior phenomenon according to “11-5. Troubleshooting by inferior phenomena”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

11-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

11-2. CHECK POINT UNDER TEST RUN

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Merger and check that it is 1.0M" or over.

wDon’t use 500V Merger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Turn on power supply twelve hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “Selection of Functions through Remote Controller”.

Make sure to read operation manual before test run. (Especially items to secure safety.)

Page 23

"TEST RUN" and the currently selected

LCD

Contents of inferior phenomena

P1 P2 P4 P5 P6 P8 P9 Fb

Abnormality of room temperature thermistor Abnormality of pipe temperature thermistor/Liquid Abnormality of drain sensor Drain overflow protection is working. Freezing/overheating protection is working. Abnormality of pipe temperature Abnormality of pipe temperature thermistor/Cond./Eva Abnormality of indoor controller board

LCD

Contents of inferior phenomena

U1~UP

F3~F9 E0~E5

E6~EF

----

FFFF

Malfunction outdoor unit Malfunction

outdoor unit Remote controller transmitting error Indoor/outdoor unit communication error

No error history No applied unit

LED1

(microcomputer power supply)

LED2

(remote controller)

LED3

(indoor/outdoor communication)

Lits when power is supplied. Lits when power is supplied for wired remote controller. The indoor unit should be connected to the outdoor unit with address “0” setting.

Flash when indoor and outdoor unit are communicating.

operation mode are displayed altemately.

Displays the remaining test run time.

[TEST] button

Pipe (liquid) temperature

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

6. Press the ON/OFF button to reset the test run in progress.

7. Register the contact number.

While the room temperature display on the remote controller is “PLEASE WAIT”, the remote controller is disabled. Wait until “PLEASE WAIT” disappears before using remote controller. “PLEASE WAIT” appears for about 2 minutes after power supply is turned on. w1

The TEST RUN appears on the screen. Cooling mode:

Heating mode: Check if warm air blows. (It takes a little while until warm air blows.)

Check for correct motion of auto-vanes. The outdoor unit features automatic capacity control to

provide optimum fan speeds. Therefore, the fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, but this does not mean malfunction.

Check if cool air blows and water is drained.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after two hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not be displayed regardless of incorrect wiring.

w1 After turning on the power supply, the system will go into start up mode, “PLEASE WAIT” will blink on the display section of

the room temperature, and lamp(green) of the remote controller will blink. As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the address is not 0. LED3 will blink. As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will light up. (After the start up mode of the system finishes, LED2(red) will be turned off.) In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from the symptoms. The below symptoms are under test run mode. “start up” in the table means the display status of w1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “PLEASE WAIT”, and

After power is turned on, “PLEASE WAIT” is displayed for 3 minutes, then error code is displayed.

No display appears even when remote controller operation switch is turned on. (Operation lamp does not light up.)

Display appears but soon disappears even when remote controller is operated.

cannot be operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only green lights up. <00> After “startup” is displayed, green(once) and red(once) blink alternately. <F1>

After “startup” is displayed, green(once) and red(twice) blink alternately. <F3, F5, F9>

After “startup” is displayed, green(twice) and red(once) blink

alternately. <EA. Eb> After “startup” is displayed, only

green lights up. <00> After “startup” is displayed, only

green lights up. <00>

• After power is turned on, “PLEASE WAIT” is displayed for 2 minutes during

• Incorrect connection of outdoor terminal block (L S1, S2, S3.)

• Outdoor unit’s safeguard installation connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity is wrong for S1, S2, S3.)

• Remote controller transmission wire short.

• There is no outdoor unit of address 0. (Address is other than 0.)

• Remote controller transmission wire open.

• After canceling function selection, operation is not possible for about 30 seconds. (Normal)

system startup. (Normal)

Cause

1, L2, L3 and

w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD

display.

See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.

Page 24

MODE

COOL

HEAT

TEST RUN

FAN

VANE

TEST RUN

3,4

ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

min

Test run [for wireless remote controller]

Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M".

1 Turn on the main power to the unit. 2 Press the button twice continuously.

(Start this operation from the status of remote controller display turned off.)

and current operation mode are displayed.

3 Press the ( ) button to activate mode, then

check whether cool air is blown out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air is blown out from the unit.

5 Press the button and check whether strong air is blown out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

7 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver while following steps

• It is not possible to run in FAN, DRY or AUTO mode.

to 77.

Page 25

11-3. HOW TO PRECEED "SELF-DIAGNOSIS"

11-3-1. When a Problem Occurs During Operation

If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display.

[CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below.

1 (If the outdoor unit is malfunctioning, the unit number will be "00".) 2 In the case of group control, for which one remote controller controls

multiple refrigerant systems, the refrigerant address and error code of the unit that first experienced trouble (i.e., the unit that transmitted the error code) will be displayed.

3 To clear the error code, press the

ON/OFF

button.

Error code (2 or 4 digits)

(Alternating Display)

Address (3 digits) or unit number (2 digits)

When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During central control by a MELANS controller, cancel the error code by pressing the

ON/OFF

button.

11-3-2. Self-Diagnosis During Maintenance or Service

Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote controller or power is shut off.

Check the error code history for each unit using the remote controller.

Switch to self-diagnosis mode.

Press the will change as shown below.

CHECK

button twice within three seconds. The display content

Unit number or refrigerant address to be diagnosed

Set the unit number or refrigerant address you want to diagnose.

Press the [TEMP] buttons ( and ) to select the desired number or address. The number (address) changes between [01] and

[50] or [00]

The refrigerant address will begin to flash approximately three seconds after being selected and the self-diagnosis process will begin.

and

[15].

Display self-diagnosis results. <When there is error code history> (For the definition of each error code, refer to the indoor unit's installation manual or service handbook.)

(Alternating Display)

Error code (2 or 4 digits)

Reset the error history. Display the error history in the diagnosis result display screen (see step

Address (3 digits) or unit number (2 digits)

Page 26

D Press the

address or refrigerant address will flash.

5 Cancel self-diagnosis.

Self-diagnosis can be cancelled by the following two methods.

H Press the

6 Press the

ON/OFF

CHECK

ON/OFF

button twice within three seconds. The self-diagnosis

button twice within three seconds. ➔ Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start

button. ➔ Self-diagnosis will be cancelled and the indoor unit will stop.

of self-diagnosis.

When the error history is reset, the display will look like the one shown below. However, if you fail to reset the error history, the error content will be displayed again.

11-3-3. Remote Controller Diagnosis

If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.

1 First, check that the power-on indicator is lit.

If the correct voltage (DC12 V) is not supplied to the remote controller, the indicator will not light. If this occurs, check the remote controller's wiring and the indoor unit.

Power on indicator

2 Switch to the remote controller self-diagnosis mode.

H Press the

change as shown below.

CHECK

button for five seconds or more. The display content will

A Press the

FILTER

button to start self-diagnosis.

3 Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

Check for other possible causes, as there is no problem with the remote controller.

[Where the remote controller is not defective, but cannot be operated.] (Error display 2) [E3], [6833] or [6832] flashes.

There might be noise or interference on the transmission path, or the indoor unit or other remote controllers are defective. Check the transmission path and other controllers.

➝ Transmission is not possible.

[When the remote controller malfunctions] (Error display 1) "NG" flashes. ➝ The remote controller's transmitting-receiv-

The remote controller must be replaced with a new one.

(Error display 3)

The number of data errors is the difference between the number of bits sent from the remote controller and the number actually transmitted through the transmission path. If such a problem is occurring, the transmitted data is affected by noise, etc. Check the transmission path.

ing circuit is defective.

"ERC" and the number of data errors are displayed. ➝ Data error has occurred.

When the number of data errors is "02": Transmission data from remote controller Transmission data on transmission path

4 To cancel remote controller diagnosis

H Press the

approximately 30 seconds, the state in effect before the diagnosis will be restored.

CHECK

button for five seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will flash. After

Page 27

11-3-4. Malfunction-diagnosis method by wireless remote controller

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

RESET

SET

CLOCK

CHECK

CHECK display

Temperature button

CHECK button

Refrigerant address display

HOUR button

ON/OFF button

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop.

<Malfunction-diagnosis method at maintenance service>

[Procedure]

1. Press the CHECK button twice.

• "CHECK" lights, and refrigerant address "00" flashes.

• Check that the remote controller's display has stopped before continuing.

2. Press the temperature buttons.

3. Point the remote controller at the

sensor on the indoor unit and press the HOUR button.

4. Point the remote controller at the

sensor on the indoor unit and press the ON/OFF button.

• Select the refrigerant address of the indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

outdoor unit’s DIP switch (SW1). (For more information, see the outdoor unit installation manual.)

• If an air conditioner error occurs, the indoor unit's sensor emits an intermittent buzzer sound, the operation light flashes, and the error code is output. (It takes 3 seconds at most for error code to appear.)

• The check mode is cancelled.

Page 28

• Refer to the following tables for details on the check codes. [Output pattern A]

Beeper sounds OPERATION

INDICATOR lamp blink pattern

Beep

Self-check starts (Start signal received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)

0.5 sec.

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table

1st2

· · · Repeated

[Output pattern B]

Beeper sounds OPERATION

INDICATOR lamp

blink

pattern

Beep Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check starts (Start signal received)

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table

1st2

· · · Repeated

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

Wired remote controller

Symptom Remark

(Number of times)

1P1 2

P2 Pipe (TH2) sensor error

P9 Pipe (TH5) sensor error 3 E6,E7 4 P4 Drain sensor error 5 P5 Drain pump error

Intake sensor error

Indoor/outdoor unit communication error

As for indoor unit, refer to indoor units service manual.

6 P6 Freezing/Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4, E5 Remote controller signal receiving error

– –

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error

– E1, E2 Remote controller control board error

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Symptom Remark

(Number of times)

1 2

3 4

6 7

8 9

10 11

12 13 14

E9 UP

U3,U4 UF

U1,Ud U5

U8 U6 U7

U9,UH

– –

Others

*1If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/49: worked/

insufficient refrigerant Abnormal high pressure (63H worked)/Overheating

protection operation Abnormal temperature of heat sink Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

–

– Other errors (Refer to the technical manual for the outdoor unit.)

two beeps to confirm the self-check start signal was received and

there are no error records.

For details, check the LED display of the outdoor controller board.

*2If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

Page 29

11-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

None —

Meaning of error code and detection method

1 No voltage is supplied to terminal

2 Electric power is not charged

3 Electric power is not supplied to

4 Open circuit of rush current

(Note 1) Refer to indoor unit section for code P and code E.

Case

block(TB1) of outdoor unit.

a) Power supply breaker is

turned off.

b) Contact failure or discon-

nection of power supply terminal

c) Open phase (L or N phase)

to power supply terminal of outdoor power circuit board.

a) Contact failure of power

supply terminal

b) Open phase on the outdoor

power circuit board

:Disconnection of connector

TABT or TABS

outdoor controller circuit board.

a) Disconnection of connector

(CNDC)

protect resistor (RS)(VHA type)

1 Check following items.

a) Power supply breaker b) Connection of power supply terminal block

c) Connection of power supply terminal block

2 Check following items.

a) Connection of power supply terminal block b) Connection of terminal on outdoor power

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board. Check connection of the connector CNDC on the outdoor power circuit board Refer to 11-9.

4 Check resistance value of rush current

protect resistor (RS).

Judgment and action

(TB1) (TB1)

(TB1) circuit board

Disconnection of connector TABT or TABS

Refer to 11-9.

(5201)

63H connector open

Abnormal if 63H connector circuit is open for three minutes continuously after power supply. 63H: High-pressure switch

5 Disconnection of reactor (DCL)

6 Disconnection of outdoor noise

filter circuit board or parts failure in outdoor noise filter circuit board As for VHA needed to check the resistance RS1 on the noise filter cuircuit board.

7 Defective outdoor power circuit

board

8 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller

circuit board

1 type, it is especially

5 Check connection of reactor. (DCL)

Check connection of “L1” and “L2” on the active filter module.(ACTM)

6 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to 11-9.

7 Replace outdoor power circuit board. 8 Replace controller board (When items above

are checked but the units can not be repaired).

1 Check connection of 63H connector on

outdoor controller circuit board. Refer to 11-9.

2 Check the 63H side of connecting wire. 3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

Page 30

Error Code

(6844)

(6845)

(6846)

Meaning of error code and detection method Indoor/outdoor unit connector

mis-wiring, excessive number of units (4 units or more)

1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the number cannot be checked automatically due to mis-wiring of indoor/outdoor unit connecting wire and etc. after power is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit board recognizes the number of connected indoor units as “4 units or more”.

Mis-wiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)

Outdoor controller circuit board can automatically set the unit number of indoor units. Abnormal if the indoor unit number can not be set within 4 minutes after power on because of mis-wiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

Start-up time over

The unit can not finish start-up process within four minutes after power on.

1 Contact failure or mis-wiring of

2 Diameter or length of

3 4 or more indoor units are 4 Defective transmitting receiving

5 Defective transmitting receiving

6 Defective indoor power board 7 Two or more outdoor units

8 Noise has entered into power

1 Contact failure or mis-wiring of

2 Diameter or length of

4 Defective transmitting receiving

5 Defective transmitting receiving 6 Defective indoor power board

7 Two or more outdoor units

8 Noise has entered into power

1 Contact failure of indoor/ 2 Diameter or length of indoor/

7 Two or more outdoor units

8 Noise has entered into power

Case

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

connected to one outdoor unit. circuit of outdoor controller

circuit board circuit of indoor controller

board

have refrigerant address “0” . (In case of group control)

supply or indoor / outdoor unit connecting wire.

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

circuit of outdoor controller circuit board

circuit of indoor controller board

have refrigerant address “0” .

(In case of group control)

supply or indoor/outdoor unit connecting wire.

outdoor unit connecting wire outdoor unit connecting wire is

out of specified capacity. have refrigerant address “0” .

(In case of group control) supply or indoor/outdoor unit

connecting wire.

Judgment and action

1 Check disconnection or looseness or polarity

of indoor/outdoor unit connecting wire of indoor and outdoor units.

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m (including wiring connecting each indoor unit and between indoor and outdoor unit) Also check if the connection order of flat cable is S1, S2, S3.

3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is detected.)

4~6 Turn the power off once, and on again to

check. Replace outdoor controller circuit board, indoor controller board or indoor power board if abnormality occurs again.

7 Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board) are overlapping in case of group control system.

8 Check transmission path, and remove the

cause.

w The descriptions above, 1-8, are for EA, Eb

and EC.

Page 31

Error Code

(1302)

(1102)

Meaning of error code and detection method Abnormal high pressure (High-pressure

switch 63H worked)

Abnormal if high-pressure switch 63H worked ( w ) during compressor operation. w 4.15 MPa

63H: High-pressure switch

Abnormal high discharging temperature

(1) Abnormal if discharge temperature

thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes.

Abnormal if condenser/evaporator

temperature thermistor (TH5) exceeds 40: during defrosting and discharge temperature thermistor (TH4) exceeds 110:.

(2) Abnormal if discharge super heat

(Cooling: TH4 – TH5 / Heating: TH4 –

TH6) increases.

All the conditions in Aor B are detected

simultaneously for 10 minutes continuously after 6 minutes past from compressor start-up (including the thermostat indication or recovery from defrosting).

• Heating mode

• When discharge super heat is less than 70 deg.

• When the TH6 temp is more than the value obtained by TH7 – 5 deg.

• When the condensing temp of TH5 is less than 35:.

Case

1 Short cycle of indoor unit 2 Clogged filter of indoor unit 3 Decreased airflow caused by

dirt of indoor fan

4 Dirt of indoor heat exchanger 5 Locked indoor fan motor 6 Malfunction of indoor fan motor 7 Defective operation of stop

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

1 Short cycle of outdoor unit 2 Dirt of outdoor heat exchanger 3 Decreased airflow caused by

defective inspection of outside temperature thermistor (It detects lower temperature than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller

board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving

circuit

1 Over-heated compressor oper-

ation caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller

board

5 Defective action of linear

expansion valve

Judgment and action

1~6Check indoor unit and repair defectives.

7 Check if stop valve is full open. 8 Check piping and repair defectives.

9~2 Check outdoor unit and repair defectives.

3 Check the inspected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to 11-10.)

4~6Turn the power off and check F5 is

displayed when the power is turned again. When F5 is displayed, refer to “Judgment and action” for F5.

7 Check linear expansion valve.

Refer to 11-6.

8 Replace outdoor controller board. 1 Check intake super heat.

Check leakage of refrigerant. Charge additional refrigerant.

2 Check if stop valve is full open. 34 Turn the power off and check if U3 is dis-

played when the power is put again. When U3 is displayed, refer to “Judgement and action” for U3.

5 Check linear expansion valve.

Refer to 11-6.

• During comp operation (Cooling and

Heating)

• When discharge super heat is less

than 80 deg in Cooling.

• When discharge super heat is less

than 90 deg in Heating.

• When condensing temp of TH6 is

more than –40:. (In Cooling only.)

Page 32

Error Code

(5104)

U4 (TH3:5105) (TH6:5107) (TH7:5106) (TH8:5110)

Meaning of error code and detection method

Open/short circuit of discharge temperature thermistor (TH4)

Abnormal if open (3: or less) or short (217: or more) is detected during compressor operation. (Detection is inoperative for 10 minutes of compressor starting process and for 10 minutes after and during defrosting.)

Open/short of outdoor unit thermistors (TH3, TH6, TH7, and TH8)

Abnormal if open or short is detected during compressor operation. Open detection of thermistors TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting. WCheck which unit has abnormality in its

thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to 11-10.)

1 Disconnection or contact

2 Defective thermistor 3 Defective outdoor controller

1 Disconnection or contact failure

(

2 Defective thermistor 3 Defective outdoor controller

Case

failure of connector (TH4) on the outdoor controller circuit board

circuit board

of connectors Outdoor controller circuit board: TH3,TH6/TH7 Outdoor power circuit board: CN3

circuit board

Judgment and action

1 Check connection of connector (TH4) on the

outdoor controller circuit board. Check breaking of the lead wire for thermistor (TH4). Refer to 11-9.

2 Check resistance value of thermistor (TH4) or

temperature by microcomputer. (Thermistor/TH4: Refer to 11-6.) (SW2 on A-Control Service Tool: Refer to 11-

10.)

3 Replace outdoor controller board. 1 Check connection of connector (TH3,TH6/TH7)

on the outdoor controller circuit board. Check connection of connector (CN3) on the outdoor power circuit board. Check breaking of the lead wire for thermistor

)

(TH3,TH6,TH7,TH8). Refer to 11-9.

2 Check resistance value of thermistor

(TH3,TH6,TH7,TH8) or check temperature by microcomputer. (Thermistor/TH3,TH6,TH7,TH8: Refer to 11-6.) (SW2 on A-Control Service Tool: Refer to 11-

10.) 3 Replace outdoor controller circuit board. WEmergency operation is available in case of

abnormalities of TH3, TH6 and TH7. Refer to 11-8.

(4230)

(4250)

Thermistors

Symbol

TH3 TH6 TH7 TH8

Abnormal temperature of heat sink

Abnormal if heat sink thermistor(TH8) detects temperature indicated below. P100-140VHA

Abnormality of power module

Check abnormality by driving power module in case overcurrent is detected. (UF or UP error condition)

Thermistor <Outdoor pipe>

Thermistor <Outdoor 2-phase pipe>

Thermistor <Outdoor>

Thermistor <Heat sink>

(1)·············84:

Name

Open detection Short detection

– 40: or below – 40: or below – 40: or below – 27: or below

1 The outdoor fan motor is

locked.

2 Failure of outdoor fan motor 3 Air flow path is clogged. 4 Rise of ambient temperature

5 Defective thermistor

6 Defective input circuit of

outdoor power circuit board

7 Failure of outdoor fan drive circuit

1 Outdoor stop valve is closed. 2 Decrease of power supply voltage 3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective compressor 5 Defective outdoor power circuit

board

90: or above 90: or above 90: or above

102: or above

12 Check outdoor fan.

3 Check air flow path for cooling. 4 Check if there is something which causes

temperature rise around outdoor unit.

(Upper limit of ambient temperature is 46:.) Turn off power, and on again to check if U5 is displayed within 30 minutes. If U4 is displayed instead of U5, follow the action to be taken for U4.

5 Check resistance value of thermistor (TH8)

or temperature by microcomputer. (Thermistor/TH8: Refer to 11-6.) (SW2 on A-Control Service Tool: Refer to 11-

10.)

6 Replace outdoor power circuit board. 7 Replace outdoor controller circuit board.

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U·V·W phase) to

compressor. Refer to 11-9 (Outdoor power circuit board).

4 Check compressor referring to 10-6. 5 Replace outdoor power circuit board.

Page 33

Error Code

(4400)

(4220)

Meaning of error code and detection method

Abnormality in the outdoor fan motor

The outdoor fan motor is considered to be abnormal if the rotational frequency of fan motor is abnormal when detected during operation. Fan motor rotational frequency is abnormal if;

• 100 rpm or below detected continuously for 15 seconds at 20: or more outside air temperature

• 50 rpm or below or 1500 rpm or more detected continuously for 1 minute.

Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit

Abnormal if any of followings are detected during compressor operation;

• Decrease of DC bus voltage to 310V

• Instantaneous decrease of DC bus voltage to 200V

• Increase of DC bus voltage to 400V

• Decrease of input current of outdoor unit to 0.5A only if operation frequency is more than or equal to 40Hz or compressor current is more than or equal to 5A.

11 Failure in the operation of 2 Failure in the outdoor circuit

1 Decrease of power supply voltage 2 Disconnection of compressor

3 Defective 52C (VHA type) 4 Defective noise filter circuit

5 Disconnection or loose connec- 6 Defective ACT module

7 8 Disconnection or loose connec- 9 Defective 52C drive circuit of

0 Disconnection or loose

1 Disconnection or loose

Case

the DC fan motor controller board

wiring

board (VHA

tion of CN52C (VHA1 type) Defective ACT module drive cir-

cuit of outdoor power circuit board tion of CNAF outdoor controller circuit board connection of CN5 on the

outdoor power circuit board connection of CN2 on the

outdoor power circuit board

1 type)

Judgment and action

1 Check or replace the DC fan motor. 2 Check the voltage of the outdoor circuit

controller board during operation.

3 Replace the outdoor circuit controller

board. (when the failure is still indicated even after performing the remedy 1 above.)

1 Check the facility of power supply. 2 Correct the wiring (U·V·W phase) to compressor.

Refer to 11-9 (Outdoor power circuit board).

3 Replace 52C. 4 Replace noise filter circuit board.

5 Check CN52C wiring. 6 Replace ACT module. 7 Replace outdoor power circuit board.

8 Check CNAF wiring. 9 Replace outdoor controller circuit board.

0 Check CN5 wiring on the outdoor power

circuit board. Refer to 11-9.

1 Check CN2 wiring on the outdoor power

circuit board. Refer to 11-9.

(1504)

(4100)

(5300)

(1300)

Over heat protection

Abnormal if outdoor pipe thermistor (TH3) detects 70: or more during compressor operation.

Compressor overcurrent interruption (When compressor locked)

Abnormal if overcurrent of DC bus or compressor is detected within 30 seconds after compressor starts operating.

Compressor current sensor error or input current error

Abnormal if compressor current sensor detects –1.5A to 1.5A during compressor operation. (This error is ignored in case of test run mode.) It’s abnormal for 38A the input current or 10 seconds continuousness 34A or more.

Abnormal low pressure

Abnormal if the following conditions are detected for continuousness 3 minutes after compressor starts heating operating for 10 minutes. (However, it becomes this abnormal detection disregard at the compressor driving time after it turns on power after 30 minutes totaling. ) TH7-TH3[4: TH5-Indoor room temperature[2:

Defective outdoor fan (fan motor) or short cycle of outdoor unit during cooling operation.

2 Defective outdoor pipe

thermistor (TH3)

Defective outdoor controller board

1 Stop valve is closed.

Decrease of power supply voltage

2 3 Looseness, disconnection or

converse of compressor wiring

connection

4 Defective compressor 5 Defective outdoor power board

1 Disconnection of compressor

wiring

2 Defective circuit of current

sensor on outdoor power circuit board

1 Stop valve of outdoor unit is

closed during operation.

2 Leakage or shortage of refriger-

ant

3 Malfunction of linear expansion

valve

1 Check outdoor unit air passage.

23 Turn the power off and on again to check

the error code. If U4 is displayed, follow the U4 processing direction.

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U·V·W phase) to

compressor. Refer to 11-9 (Outdoor power circuit board).

4 Check compressor.

Refer to 11-6.

5 Replace outdoor power circuit board.

1 Correct the wiring (U·V·W phase) to

compressor. Refer to 11-9 (Outdoor power circuit board).

2 Replace outdoor power circuit board.

1 Check stop valve. 2 Check intake super heat.

Check leakage of refrigerant. Charge additional refrigerant.

3 Check linear expansion valve.

Refer to 11-6.

Thermistor TH3:Outdoor liquid pipe temperature

TH5:Indoor cond./eva. Temperature TH7:Outdoor temperature

Page 34

Error Code

(4210)

Meaning of error code and detection method

Compressor overcurrent interruption

Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds.

1 Stop valve of outdoor unit is 2 Decrease of power supply volt- 3 Looseness, disconnection or

4 Defective fan of indoor/outdoor 5 Short cycle of indoor/outdoor 6 Defective input circuit of out- 7 Defective compressor

Case

closed. age converse of compressor wiring

connection units units door controller board

Judgment and action

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U·V·W phase) to

compressor. Refer to 11-9 (Outdoor power

circuit board).

4 Check indoor/outdoor fan. 5 Solve short cycle. 6 Replace outdoor controller circuit board. 7 Check compressor.

Refer to 11-6.

W Before the replacement of the outdoor

controller circuit board, disconnect the wiring to compressor from the outdoor power circuit board and check the output voltage among phases, U, V, W, during test run. No defect on board if voltage among phases (U-V, V-W and W-U) is same. Make sure to perform the voltage check with same performing frequency.

E0 E4

E1 E2

Remote controller transmission error(E0)/signal receiving error(E4)

1 Abnormal if main or sub remote con-

troller can not receive normally any transmission from indoor unit of refrigerant address “0” for 3 minutes. (Error code : E0)

2 Abnormal if sub remote controller could

not receive for any signal for 2 minutes. (Error code: E0)

1 Abnormal if indoor controller board can

not receive normally any data from remote controller board or from other indoor controller board for 3 minutes. (Error code: E4)

2 Indoor controller board cannot receive

any signal from remote controller for 2 minutes. (Error code: E4)

Abnormality of remote controller control board

1 Abnormal if data cannot be normally

read from the nonvolatile memory of the remote controller control board. (Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be normally operated. (Error code: E2)

1 Contact failure at transmission

wire of remote controller

2 All remote controllers are set

as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board.

3 Mis-wiring of remote controller. 4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiving

circuit of indoor controller board of refrigerant address “0”

6 Noise has entered into the

transmission wire of remote controller.

1 Defective remote controller 1 Replace remote controller.

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main”.

If there is no problem with the action above.

3 Check wiring of remote controller.

• Total wiring length: max.500m (Do not use cablex 3 or more)

• The number of connecting indoor units:

max.16units

• The number of connecting remote con-

troller: max.2units

When it is not the above-mentioned problem of

1~3 4 Diagnose remote controllers.

a) When “RC OK” is displayed,

Remote controllers have no problem. Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

b) When “RC NG” is displayed,

Replace remote controller. c) When “RC E3” is displayed, d) When “ERC 00-06” is displayed, [ c),d)→Noise may be causing abnormality. ]

∗ If the unit is not normal after replacing

indoor controller board in group control, indoor controller board of address “0” may be abnormal.

Page 35

Error Code

Meaning of error code and detection method Remote controller transmission

error(E3)/signal receiving error(E5)

1 Abnormal if remote controller could not

find blank of transmission path for 6 seconds and could not transmit. (Error code: E3)

2 Remote controller receives transmitted

data at the same time, compares the data, and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E3)

1 Abnormal if indoor controller board could

not find blank of transmission path.

(Error code: E5)

2 Indoor controller board receives trans-

mitted data at the same time, compares the data,and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E5)

1 Two remote controllers are set

2 Remote controller is connected 3 Repetition of refrigerant 4 Defective transmitting receiving 5 Defective transmitting receiving

6 Noise has entered into trans-

Case

as “main.”

(In case of two remote con-

trollers) with two indoor units or more. address circuit of remote controller circuit of indoor controller

board mission wire of remote con-

troller.

Judgment and action

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting. 4~6 Diagnose remote controller.

a) When “RC OK”is displayed, remote con-

trollers have no problem. Put the power off,and on again to check. When becoming abnormal again, replace

indoor controller board.

b)When “RC NG”is displayed, replace

remote controller.

c)When “RC E3”or “ERC 00-66”is displayed,

noise may be causing abnormality.

(6840)

(6841)

(6607

6608)

(0403)

Indoor/outdoor unit communication error (Signal receiving error) (Outdoor unit)

(1) Abnormal if outdoor controller circuit

board could not receive anything normally for 3 minutes.

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

(1) Abnormal if “0” receiving is detected 30

times continuously though outdoor controller circuit board has transmitted “1”.

(2) Abnormal if outdoor controller circuit

board could not find blank of transmission path for three minutes.

Non defined error code

This code is displayed when non defined error code is received.

Serial communication error

1.Abnormal if serial communication between outdoor controller circuit board and outdoor power circuit board is defective.

2. Abnormal if communication between

outdoor controller circuit board and M-NET board is not available.

1 Contact failure of indoor/out-

door unit connecting wire

2 Defective communication circuit

of outdoor controller circuit board

3 Defective communication cir-

cuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

1 Indoor/ outdoor unit connecting

wire has contact failure.

2 Defective communication circuit

of outdoor controller circuit board

3 Noise has entered power supply. 4 Noise has entered indoor/ out-

door unit connecting wire.

1 Noise has entered transmis-

sion wire of remote controller.

2 Noise has entered indoor/ out-

door unit connecting wire.

3 Outdoor unit is not a series of

power-inverter.

4 Model name of remote con-

troller is PAR-S25A.

1 Breaking of wire or contact

failure of connector CN2 between the outdoor controller circuit board and the outdoor power circuit board

2 Breaking of wire or contact

failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board

3 Defective communication circuit

of outdoor power circuit board

4 Defective communication circuit

of outdoor controller circuit board for outdoor power circuit board

1 Breaking of wire or contact

failure of connector between outdoor controller circuit board and M-NET board

2 Contact failure of M-NET board

power supply line

3 Noise has entered into M-NET

transmission wire.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor or outdoor units.

2~4 Turn the power off, and on again to

check. Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again.

1 Check disconnection or looseness of

indoor/outdoor unit connecting wire.

2~4 Turn the power off, and on again to

check. Replace outdoor controller circuit board if abnormality is displayed again.

12 Turn the power off, and on again to check.

Replace indoor controller board or outdoor controller circuit board if abnormality is displayed again.

3 Replace outdoor unit with power-inverter type

outdoor unit.

4 Replace remote controller with MA remote

controller.

12 Check connection of each connector CN2

and CN4 between the outdoor controller circuit board and the outdoor power circuit board.

3 Replace outdoor power circuit board. 4 Replace outdoor controller circuit board.

1 Check disconnection, looseness, or breaking of

connection wire between outdoor controller circuit board (CNMNT) and M-NET board (CN5).

2 Check disconnection, looseness, or breaking of

connection wire between outdoor controller circuit board(CNMNT) and M-NET board (CND).

3 Check M-NET transmission wiring method.

Page 36

Error Code

123456

ON OFF

123456

ON OFF

123456

ON OFF

123456

ON OFF

A-Control Service Tool SW2 setting

Temperature display of indoor liquid pipe Indoor 1

Temperature display of indoor liquid pipe Indoor 2

Temperature display of indoor condenser/ evaporator pipe Indoor 1

Temperature display of indoor condenser/ evaporator pipe Indoor 2

Meaning of error code and detection method

Abnormality of pipe temperature

1 Slight temperature difference <Cooling mode> Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes later of compressor start and 6 minutes later of the liquid or condenser/evaporator pipe is out of cooling range. Note 1) It takes at least 9 min. to detect. Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

2 Converse connection of

(TH2 or TH5) – intake temperature (TH1) [ -3 deg

TH: Lower temperature between liquid pipe

3 Converse wiring of indoor/

temperature and condenser/ evaporator temperature

4 Defective detection of indoor <Heating mode> When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is

5 Stop valve is not opened detected as abnormal when condenser/evaporator pipe temperature is not in heating range within 20 minutes.

Note 3) It takes at least 27 minutes to

detect abnormality.

Note 4) It excludes the period of defrosting

(Detection restarts when defrosting mode is over)

Heating range : 3 deg [ (Condenser/

Evaporator temperature(TH5) – intake temperature(TH1))

Case

between indoor room temperature and pipe <liquid or condenser / evaporator> temperature thermistor

• Shortage of refrigerant

• Disconnected holder of pipe <liquid or condenser /

evaporator> thermistor

• Defective refrigerant circuit

extension pipe (on plural units connection)

outdoor unit connecting wire (on plural units connection)

room temperature and pipe <condenser / evaporator> temperature thermistor

completely.

Judgment and action

1~4 Check pipe <liquid or condenser /

evaporator> temperature with room temperature display on remote controller and outdoor controller circuit board. Pipe <liquid or condenser / evaporator> temperature display is indicated by setting SW2 of outdoor controller circuit board as follows.

Conduct temperature check with outdoor controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor unit connecting wire.

)

<M-NET communication error>

Error Code

(6600)

(6602)

(6603)

Meaning of error code and detection method Address duplicate definition

This error is displayed when transmission from the units of same address is detected. Note) The address and attribute displayed

Hard ware error of transmission processor

Transmission processor intended to transmit “0”, but “1” appeared on transmission wire. Note) The address and attribute display at

BUS BUSY

1. Over error by collision damage Abnormal if transmitting is not possible for 8-10 minutes continuously because of collision of transmission.

2. Data could not reach transmission wire for 8-10 minutes continuously because of noise or etc.

Note) The address and attribute displayed

at remote controller indicate the controller that detected abnormality.

remote controller indicate the controller that detected abnormality.

at remote controller indicate the controller that detected abnormality.

(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.

Case Judgment and action

1 There are two or more same

address of controller of outdoor unit, indoor unit, FRESH MASTER, or LOSSNAY.

2 Noise has entered into trans-

mission signal and signal was transformed.

1 Error is detected if wave form is

transformed when wiring works of transmission wire of outdoor unit, indoor unit, FRESH MASTER or LOSSNAYare done, or polarity is changed with the power on and transmission data collide each other.

2 Defective transmitting receiving

circuit of transmission processor

3 Transmission data is changed by

the noise on transmission. Transmission processor could

not transmit because short cycle voltage of noise and the like have entered into transmission wire continuously.

2 Transmission quantity has

increased and transmission is not possible because there was wiring mistake of terminal block for transmission wire (TB3) and terminal block for central control (TB7) in outdoor unit.

3 Transmission is mixed with

others and occupation rate on transmission wire rose because of defective repeater (a function to connector or disconnect transmission of control and central control system) of outdoor unit, then abnormality is detected.

Search the unit with same address as abnormality occurred. If the same address is found, turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more after the address is corrected, and turn the power on again. Check transmission wave form or noise on transmission wire.

1 If the work of transmission wire is done with

the power on, shut off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

2 Check transmission wave form or noise on

transmission wire.

1 Check if transmission wire of indoor unit,

FRESH MASTER, LOSSNAY, or remote controller is not connected to terminal block for central control (TB7) of outdoor unit.

2 Check if transmission wire of indoor unit,

FRESH MASTER or LOSSNAY is not connected to terminal block for transmission wire of outdoor unit.

3 Check if terminal block for transmission wire

(TB3) and terminal block for central control (TB7) is not connected.

4 Check transmission wave form or noise on

transmission wire.

Page 37

Error Code

(6606)

Meaning of error code and detection method

Communication error with communication processor

Defective communication between unit processor and transmission processor Note) The address and attribute display at

remote controller indicate the controller that detected abnormality.

1 Data of transmission proces-

2 Address forwarding from unit

Case Judgment and action

sor or unit processor is not transmitted normally because of accidental trouble such as noise or thunder surge.

processor is not transmitted normally because of defective transmission processor hardware.

Turn off the power supply of outdoor unit,

indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again. System returns normally if abnormality was accidental malfunction. If the same abnormality generates again, abnormality-generated controller may be defective.

(6607)

NO ACK signal

1. Transmitting side controller detects abnormal if a message was transmitted but there is no reply (ACK) that a message was received. Transmitting side detects abnormality every 30 seconds, 6 times continuously.

Note) The address and attribute displayed

at remote controller is indicate the controller that did not reply (ACK).

2. If displayed address or attribute is outdoor unit, Indoor unit detects abnormality when indoor unit transmitted to outdoor unit and there was no reply (ACK).

3. If displayed address or attribute is indoor unit, Remote controller detects abnormality when remote controller transmitted to indoor unit and there was no reply (ACK).

Common factor that has no relation with abnormality source 1 The unit of former address

does not exist as address switch has changed while the unit was energized.

2 Extinction of transmission wire

voltage and signal is caused by over-range transmission wire.

• Maximum distance ······200m

•

Remote controller line

3 Extinction of transmission wire

voltage and signal is caused by type-unmatched transmission wire. Type······

With shield wire-

CVVS, CPEVS

With normal wire (no shield)-

VCTF, VCTFK, CVV CVS, VVR, VVF, VCT

Diameter····1.25mm2or more

4 Extinction of transmission wire

voltage and signal is caused by over-numbered units.

5 Accidental malfunction of

abnormality-detected controller (noise, thunder surge)

6 Defective of abnormality-gen-

erated controller

1 Contact failure of transmission

wire of outdoor unit or indoor unit

2 Disconnection of transmission

connector (CN2M) of outdoor unit

3 Defective transmitting receiv-

ing circuit of outdoor unit or indoor unit

1 During group operation with

indoor unit of multi- refrigerant system, if remote controller transmit to indoor unit while outdoor unit power supply of one refrigerant system is put off or within two minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiv-

ing circuit of indoor unit or remote controller

··(12m)

Always try the followings when the error “A7” occurs.

1 Turn off the power supply of outdoor unit,

indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again. If malfunction was accidental, the unit returns to normal.

2 Check address switch of abnormality-gener-

ated address.

3 Check disconnection or looseness of abnor-

mality-generated or abnormality-detected transmission wire (terminal block and connector)

4 Check if tolerance range of transmission wire

is not exceeded.

5 Check if type of transmission wire is correct

or not.

If there were some trouble of 1-5 above, repair the defective, then turn off the power supply of outdoor unit and indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

• If there was no trouble with 1-5 above in single refrigerant system (one outdoor unit), controller of displayed address or attribute is defective.

• If there was no trouble with 1-5 above in different refrigerant system (two or more outdoor units), judge with 6.

6 If address of abnormality source is the

address that should not exist, there is the unit that memorizes nonexistent address information. Delete useless address information with manual setting function of remote controller. Only the system FRESH MASTER or LOSSNAY are connected to, or the system that is equipped with group setting of different refrigerant system.

If there was no trouble with 1-6 above, replace the controller board of displayed address or attribute. If the unit does not return normally, multi-controller board of outdoor unit may be defective (repeater circuit). Replace multi-controller board one by one to check if the unit returns normally.

Continued to the next page.

Page 38

From the previous page.

Error Code

Meaning of error code and detection method

4. If displayed address or attribute is remote controller, Indoor unit detects abnormality when indoor unit transmitted to remote controller and there was no reply (ACK).

Case Judgment and action

1 During group operation with

indoor unit of multi- refrigerant system, if indoor unit transmit to remote controller while outdoor unit power supply of one refrigerant system is turned off or within two minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiv-

ing circuit of indoor unit or remote controller

Same as mentioned in “A7” of the previous page

(6607)

5. If displayed address or attribute is FRESH MASTER, Indoor unit detects abnormality when indoor unit transmitted to FRESH MASTER and there was no reply (ACK).

6. If displayed address or attribute is LOSSNAY, Indoor unit detects abnormality when indoor unit transmitted to LOSSNAY and there was no reply (ACK).

1 During sequential operation of

indoor unit and FRESH MASTER of other refrigerant system, if indoor unit transmits to FRESH MASTER while outdoor unit power supply of same refrigerant system with FRESH MASTER is turned off or within 2 minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of indoor unit or FRESH MASTER

3 Disconnection of transmission

connector (CN2M) of indoor unit or FRESH MASTER

4 Defective transmitting receiv-

ing circuit of indoor unit or FRESH MASTER

1 If the power supply of LOSS-

NAY is off, indoor unit detects abnormality when it transmits to LOSSNAY.

2 During sequential operation of

indoor unit and LOSSNAY of other refrigerant system, if indoor unit transmits to LOSSNAY while outdoor unit power supply of same refrigerant system with LOSSNAY is turned off or within 2 minutes of restart, abnormality is detected.

3 Contact failure of transmission

wire of indoor unit of LOSSNAY

4 Disconnection of transmission

connector (CN2M) of indoor unit

5 Defective transmitting receiv-

ing circuit of indoor unit or LOSSNAY

7. If displayed address or attribute is nonexistent,

1 The unit of former address

does not exist as address switch has changed while the unit was energized.

2 Abnormality is detected when

indoor unit transmitted because the address of FRESH MASTER and LOSSNAY are changed after sequential operation of FRESH MASTER and LOSSNAY by remote controller.

Page 39

Error Code

(6608)

Meaning of error code and detection method

M-NET•NO RESPONSE

Abnormal if a message was transmitted and there were reply (ACK) that message was received, but response command does not return. Transmitting side detects abnormality every 30 seconds, 6 times continuously. Note) The address and attribute displayed

at remote controller is indicate the controller that did not reply (ACK).

1 Transmitting condition repeats

2 Extension of transmission wire

3 Extension of transmission wire

4 Accidental malfunction of

Case Judgment and action

fault because of noise and the like.

voltage and signal is caused by over-range transmission wire.

• Maximum distance ······200m Remote controller line

•

voltage and signal is caused by type-unmatched transmission wire. Type······

With shield wire-

CVVS, CPEVS

With normal wire (no shield)-

VCTF, VCTFK, CVV CVS, VVR, VVF, VCT

Diameter····1.25mm2or more abnormality-generated

controller

··(12m)

11-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

1DC12V is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

2DC12~15V is supplied to remote controller, however,

no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

Factor Countermeasure

1 Check transmission wave form or noise on

transmission wire.

2 Turn off the power supply of outdoor unit and

indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again. If malfunction was accidental, the unit returns to normal. If the same abnormality generates again, controller of displayed address and attribute may be defective.

1Check LED2 on indoor controller board.

(1) When LED2 is lit.

Check the remote controller wiring for breaking or contact failure.

(2) When LED2 is blinking.

Check short circuit of remote controller wiring.

(3) When LED2 is not lit.

Refer to No.3 below.

2Check the following.

• Failure of remote controller if “PLEASE WAIT” is not displayed

• Refer to No.2 below if “PLEASE WAIT” is displayed.

2. “PLEASE WAIT” display is remained on the remote controller.

3. When pressing the remote controller operation switch, the OPERATION display is appeared but it will be turned off soon.

1At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2Communication error between the remote controller

and indoor unit

3Communication error between the indoor and outdoor

unit

4Outdoor unit protection device connector is open.

1After cancelling to select function from the remote

controller, the remote controller operation switch will be not accepted for approx. 30 seconds.

1Normal operation 2Self-diagnosis of remote controller 3”PLEASE WAIT” is displayed for 6 min-

utes at most, in case of indoor/outdoor unit communication error. Check LED3 on indoor controller board. (1)When LED3 is not blinking.

Check indoor/outdoor connecting wire for miswiring.(Converse wiring of S1 and S2, or break of S3 wiring.)

(2)When LED3 is blinking.

Indoor/outdoor connecting wire is normal.

4Check LED display on outdoor controller

circuit board. Refer to 11-10. Check protection device connector (63L and 63H) for contact failure. Refer to 11-9.

1Normal operation

Page 40

Phenomena

4. Even controlling by the wireless remote controller, no beep is heard and the unit does not start operating. Operation display is indicated on wireless remote controller.

5. When operating by the wireless remote controller, beep sound is heard, however, unit does not start operating.

6. Remote controller display works normally and the unit performs cooling operation, however, the capacity cannot be fully obtained. (The air does not cool well.)

7. Remote controller display works normally and the unit performs heating operation, however, the capacity cannot be fully obtained.

Factor

1The pair number settings of the wireless remote

controller and indoor controller board are mismatched.

1No operation for 2 minutes at most after the power

supply ON

2Local remote controller operation is prohibited.

• Remote controlling adaptor is connected to CN32 on the indoor controller board.

• Local remote controller operation is prohibited

by centralised controller etc. since it is connected to MELANS.

3Refer to the factor of No.2 on previous page. 1Refrigerant shortage

2Filter clogging 3Heat exchanger clogging 4Air duct short cycle

1Linear expansion valve fault

Opening cannot be adjusted well due to linear expansion valve fault.

2Refrigerant shortage 3Lack of insulation for refrigerant piping 4Filter clogging 5Heat exchanger clogging 6Air duct short cycle 7Bypass circuit of outdoor unit fault

Countermeasure

1Check the pair number settings.

1Normal operation 2Normal operation

Check the details of No.2 on previous page.

1• If refrigerant leaks, discharging tempera-

ture rises and LEV opening increases. Inspect leakage by checking the tem- perature and opening.

• Check pipe connections for gas leakage.

2Open suction grill and check the filter.

Clean the filter by removing dirt or dust on it.

3• If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.

• Clean the heat exchanger.

4Remove the shield.

1• Discharging temperature and indoor

heat exchanger temperature does not rise. Inspect the failure by checking discharging pressure.

• Replace linear expansion valve.

2• If refrigerant leaks, discharging tempera

ture rises and LEV opening increases. Inspect leakage by checking the temperature and opening.

• Check pipe connections for gas leakage.

3Check the insulation. 4Open suction grill and check the filter.

Clean the filter by removing dirt or dust on

it.

5• If the filter is clogged, indoor pipe tem-

perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.

• Clean the heat exchanger.

6Remove the shield. 7Check refrigerant system during operation.

8. 1For 3 minutes after temperature adjuster turns off, the compressor will not start operating even if temperature adjuster is turned on.

2For 3 minutes after temperature

adjuster turns on, the compressor will not stop operating even if temperature adjuster is turned off. (Compressor stops operating immediately when turning off by the remote controller.)

12Normal operation

(For protection of compressor)

12Normal operation

Page 41

How long is “PLEASE WAIT”

kept being displayed on the

remote controller?

6 minutes or more

2 minutes or less

2 to 6 minutes

YES

Are any error codes

displayed on the

remote controller?

Are any error codes

displayed on the LED?

Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller.

Check the display time of “PLEASE WAIT” after turning on the main power.

•

“PLEASE WAIT” will be displayed during the start-up

diagnosis after turning

on the main power.

• Normal. The start-up diagnosis will

be over in around 2 minutes.

• Mis-wiring of indoor/ outdoor connecting wire

• Breaking of indoor/ outdoor connecting wire (S3)

• Defective indoor controller board

• Defective outdoor controller circuit board

• Refer to “Self-diagnosis action table” in order to solve the trouble.

• In case of communication errors, the display of remote controller may not match the LED display of the outdoor unit.

• Defective indoor controller board

• Defective remote controller

Check the LED display of the outdoor controller circuit board.

Diagnosis flow Cause

Inspection method and troubleshooting

Page 42

Symptoms: Nothing is displayed on the remote controller 1

LED display of the indoor controller board LED1 : LED2 : LED3 :

Diagnosis flow Cause

Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit which is used to connect the indoor unit and the outdoor unit.

AC 198V to AC 264V?

YES

Check the voltage among L(L3) and N on the terminal block (TB1) of the outdoor power circuit board.

AC 198V to AC 264V?

YES

Check the voltage between S1 and S2 on the terminal block (TB1) of the outdoor unit which is used to connect the indoor unit and the outdoor unit.

•

Troubles concerning

power supply

Inspection method and troubleshooting

• Check the power wiring to the outdoor unit.

• Check the breaker.

Check the voltage of indoor controller board (CN2D).

DC 12V to DC 16V?

YES

Check the voltage of the unit after removing the indoor power board (CN2S).

DC 12V to DC 16V?

YES

AC 198V to AC 264V?

YES

• Bad wiring of the outdoor controller board

•

The fuses on the outdoor controller circuit board are blown.

• Check the wiring of the outdoor unit.

• Check if the wiring is bad. Check if the fuses are blown.

The fuses on the outdoor controller circuit board will be blown when the indoor /outdoor connecting wire short-circuits.

• Bad wiring of the outdoor controller board

•

The fuses on the outdoor controller circuit board are blown.

• Defective indoor controller board

• Mis-wiring, breaking or poor connection of

• Check if mis-wiring, breaking or poor contact is causing this

problem. Indoor/outdoor connecting wire is polarized 3-core type. Connect the indoor unit and the outdoor unit by wiring each pair of S1, S2 and S3 on the both side of indoor/outdoor terminal blocks.

• Replace the indoor

controller board.

Check if there is mis-wiring

•

or breaking of wire. in door/outdoor connecting wire

• Defective indoor power board

• Replace the indoor

power board.

Page 43

Symptoms: Nothing is displayed on the remote controller 2

LED display of the indoor controller board LED1 : LED2 : LED3 : or

Diagnosis flow Cause

Check the voltage between S1 and of the

indoor unit which is used to connect the indoor unit and the

outdoor unit.

AC 198V to AC 264V?

YES

Check the status of the indoor controller board LED3 display.

Blinking.

Check the refrigerant address of the outdoor unit. (SW1-3 to 1-6)

Is the refrigerant address “0”?

YES

Check the LED display of the outdoor unit after turning on the main power again.

S2 on the terminal block (TB4)

Not lighting.

Check the looseness or disconnection of the indoor/outdoor connecting wire.

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

YES

•

Breaking or poor contact of the indoor/outdoor connecting wire

• Normal Only the unit which has the refrigerant address “0” supplies power to the remote controller.

Inspection method and troubleshooting

• Fix the breaking or poor contact of the indoor/outdoor

connecting wire.

• Set the refrigerant

address to “0”. In case of the multiple grouping system, recheck the refrigerant address again.

Is anything displayed?

Displayed.

Is “EA” or “Eb” displayed?

YES

Check the voltage between S2 and S3 on the terminal block of the outdoor unit.

DC 17V to DC 28V?

YES

Not displayed.

Is “E8” displayed?

Can the unit be restarted?

Can all the indoor unit be operated?

YES

• Defective outdoor controller circuit board

YES

• Defective outdoor controller circuit board

• Defective indoor controller board

• Influence of electromagnetic noise

• Defective outdoor

power circuit board

• Defective indoor

power board

• Replace the outdoor controller circuit board.

Replace the indoor controller

• board of the indoor unit which

doesn’t operate.

• Not abnormal. There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

• Replace the outdoor

power circuit board.

• Replace the indoor

power board.

Page 44

Symptoms: Nothing is displayed on the remote controller 3

LED display of the indoor controller board LED1 : LED2 : or LED3 : —

Diagnosis flow Cause

Check the voltage of the terminal block (TB6) of the remote controller.

DC 10V to DC 16V?

Check the status of the LED2.

Blinking

Check the status of the LED2 after disconnecting the remote controller wire from the terminal block (TB5) of the indoor unit.

YES

Lighting

• Defective remote controller

• Breaking or poor contact of the remote controller wire

Inspection method and troubleshooting

• Replace the remote controller.

• Check if there is breaking or poor contact of the remote controller wire. Check the voltage of the terminal block (TB5) connecting the remote controller wire.

If it is not between DC 10V and DC16V, the indoor controller board must be defective.

Check the status of the LED2.

Blinking

Lighting

• The remote controller wire short-circuits

• Defective indoor controller board

• Check if the remote controller wire is short-circuited.

• Replace the indoor controller board.

Page 45

• Before repair Frequent calling from customers

Phone Calls From Customers How to Respond Note

Unit does not operate at all.

The operating display of remote controller does not come on.

2 Unit cannot be restarted for a

while after it’s stopped.

3 Error code appears and blinks

on the display of remote controller.

1 Check if power is supplied to air conditioner.

Nothing appears on the display unless power is supplied.

2 Wait around 3 minutes to restart unit.

The air conditioner is in a state of being protected by the microcomputer’s directive. Once the compressor is stopped, the unit cannot be restarted for 3 minutes. This control is also applied when the unit is turned on and off by remote controller or thermostat.

3 Error code will be displayed if any protection

devices of the air conditioner are actuated. What is error code?

Refer to “SELF-DIAGNOSIS ACTION TABLE”. Check if servicing is required for the error.

Remote controller

“PLEASE WAIT” is displayed

1 on the screen.

“FILTER” is displayed on the

2 screen.

“STANDBY” is displayed on the

screen.

“DEFROSTING” is displayed on

4 the screen. (No air comes out of the unit.)

1 Wait around 2 minutes.

An automatic startup test will be conducted for 2 minutes when power is supplied to the air conditioner. “PLEASE WAIT” will be kept being

displayed while that time. 2 This indicates that it is time to clean the air filters.

Clean the air filters. Press the FILTER button on the remote controller twice to clear “FILTER” from the display. See the operation manual that came with the product for how to clean the filters.

3 This is displayed when the unit starts HEAT operation, when the thermostat puts the compressor in operation mode, or when the outdoor unit ends DEFROST operation and returns to HEAT operation. The display will automatically disappear around 10 minutes later. While “STANDBY” is displayed on the remote controller, the airflow amount will be restricted because the indoor unit’s heat exchanger is not fully heated up. In addition to that, the up/down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body. The up/down vane will return to the setting specified by the remote controller when “STANDBY” is released.

4 The outdoor unit gets frosted when the outside temperature is low and the humidity is high. “DEFROSTING” indicates the DEFROST operation is being performed to melt this frost. The DEFROST operation ends in around 10 minutes (at most 15 minutes). During the DEFROST operation, the indoor unit’s heat exchanger becomes cold, so the blower is stopped. The up/down vane will be automatically set to horizontal blow in order to prevent cold air from directly blowing out to human body. The display will turn into “STANDBY” when DEFROST operation ends.

Display time of “FILTER” depends on the model. Long life filter: 2500 hrs. Regular filter: 100 hrs.

Page 46

Phone Calls From Customers How to Respondm Note

The room cannot be cooled or heated sufficiently.

Sound comes out from the air conditioner.

An gas escaping sound is heard

sometimes.

A cracking sound is heard

sometimes.

A buzzing sound is heard

sometimes.

A ticking sound is heard from

the outdoor unit sometimes.

1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate.

The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature. HEAT: When the set temperature is higher than the room temperature.

2 Check if filters are not dirty and clogged. If filters are clogged, the airflow amount will be reduced and the unit capacity will be lowered. See the instruction manual that came with the product for how to clean the filters.

3 Check there is enough space around the air conditioner. If there are any obstacles in the air intake or air outlet of indoor/outdoor units, they block the airflow direction so that the unit capacity will be lowered.

1 This is not a malfunction. This is the sound which is heard when the flow of refrigerant in the air conditioner is switched.

2 This is not a malfunction. This is the sound which is heard when internal parts of units expand or contract when the temperature changes.

3 This is not a malfunction. This is the sound which is heard when the outdoor unit starts operating.

4 This is not a malfunction. This is the sound which is heard when the blower of the outdoor unit is controlling the airflow amount in order to keep the optimum operating condition.

Something is wrong with the blower…..

A sound, similar to water

flowing, is heard from the unit.

The fan speed doesn’t match the setting of the remote controller during DRY operation.(No air comes out sometimes during DRY operation.)

The fan speed doesn’t match the setting of the remote controller in HEAT operation.

5 This is not a malfunction. This is the sound which is heard when the refrigerant is flowing inside the indoor unit.

1 This is not a malfunction. During the DRY operation, the blower’s ON/OFF is controlled by the microcomputer to prevent overcooling and to ensure efficient dehumidification. The fan speed cannot be set by the remote controller during DRY operation.

2 This is not a malfunction.

1) When the HEAT operation starts, to prevent the unit from blowing cold air, the fan speed is gradually increased from zero to the set speed, in proportion to the temperature rise of the discharged air.

2) When the room temperature reaches the set temperature and the outdoor unit stops, the unit starts the LOW AIR operation.

During the HEAT operation, the DEFROST operation is performed to defrost the outdoor unit. During the DEFROST operation, the blower is stopped to prevent cold air coming out of the indoor unit.

The up/down vane will be automatically set to horizontal blow in these cases listed up on the left (1~3). After a while, the up/down vane will be automatically moved according to the setting of the remote controller.

Page 47

Phone Calls From Customers How to Respond Note

Something is wrong with the blower…..

Something is wrong with the airflow direction….

The air conditioner starts operating even though any buttons on the remote controller are not pressed.

The air conditioner stops even though any buttons on the remote controller are not pressed.

Air blows out for a while after

HEAT operation is stopped.

The airflow direction is changed

during COOL operation.

The airflow direction is changed during HEAT operation. (The airflow direction cannot be set by remote controller.)

The airflow direction doesn’t change. (Up/down vane, left/right louver)

3 This is not a malfunction. The blower is operating just for cooling down the heated-up air conditioner. This will be done within one minute. This control is conducted only when the HEAT operation is stopped with the electric heater ON.

1 If the up/down vane is set to downward in COOL operation, it will be automatically set to horizontal blow by the microcomputer in order to prevent water from dropping down. “1 Hr.” will be displayed on the remote controller if the up/down vane is set to downward with the fan speed set to be less than “LOW”.

2 In HEAT operation, the up/down vane is automatically controlled according to the temperature of the indoor unit’s heat exchanger. In the following cases written below, the up/down vane will be set to horizontal blow, and the setting cannot be changed by remote controller.

1) At the beginning of the HEAT operation

2) While the outdoor unit is being stopped by thermostat or when the outdoor unit gets started to operate.

3) During DEFROST operation The airflow direction will be back to the setting of remote controller when the above situations are released.

3 1) Check if the vane is set to a fixed position. (Check if the vane motor connector is removed.)

2) Check if the air conditioner has a function for switching the air direction.

3) If the air conditioner doesn’t have that function, “NOT AVAILABLE” will be displayed on the remote controller when “AIR DIRECTION” or “LOUVER” button is pressed.

1 Check if you set ON/OFF timer. The air conditioner starts operating at the time designated if ON timer has been set before.

2 Check if any operations are ordered by distant control system or the central remote controller. While “CENTRALLY CONTROLLED INDICATOR” is displayed on the remote controller, the air conditioner is under the control of external directive.

3 Check if power is recovered from power failure (black out). The units will automatically start operating when power is recovered after power failure (black out) occurs. This function is called “auto recovery feature from power ”.

1 Check if you set ON/OFF timer. The air conditioner stops operating at the time designated if OFF timer has been set before.

Check if any operations are ordered by distant control system or the central remote controller. While “CENTRALLY CONTROLLED INDICATOR” is displayed on the remote controller, the air conditioner is under the control of external directive.

However, this control is also applied to the models which has no electric heater.

“STANDBY” will be displayed on the remote controller in case of 1 and 2. “DEFROSTING” will be displayed on the screen in case of 3.

There might be a case that “CENTRALLY CONTROLLED

INDICATOR displayed.

There might be a case that “CENTRALLY CONTROLLED INDICATOR” will not be displayed.

” will not be

Page 48

Phone Calls From Customers How to Respond Note

A white mist is expelled from the indoor unit.

Water or moisture is expelled from the outdoor unit.

The display of wireless remote controller gets dim or doesn’t come on. The indoor unit doesn’t receive a signal from remote controller at a long distance.

This is not a malfunction. This may occur when the operation gets started in the room of high humidity.

Cooling; when pipes or piping joints are cooled, they get sweated and water drips down. Heating; water drips down from the heat exchanger. * Make use of optional parts “Drain Socket” and “Drain pan” if these water needs to be collected and drained out for once.

Batteries are being exhausted. Replace them and press the reset button of remote controller.

Page 49

1 2 3 4 5 6

Gray

Orange Red

Yellow Black

Parts name

Check points

Disconnect the connector then measure the resistance with a tester. (Surrounding temperature 10:~30:)

Thermistor (TH3) <Outdoor pipe>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <Outdoor 2-phase pipe>

Thermistor (TH7) <Outdoor>

Thermistor (TH8) <Heat sink>

Normal

160k"~410k"

4.3k"~9.6k"

39k"~105k"

TH4 TH3 TH6 TH7 TH8

Abnormal

Open or short

Measure the resistance between the terminals with a tester. (Surrounding temperature 20

)

Solenoid valve coil <Four-way valve> (21S4)

Motor for compressor (MC)

Linear expansion valve (LEV-A)

Normal

Abnormal

Open or short

P100 P125,P140

Disconnect the connector then measure the resistance with a tester. (Winding temperature 20:)

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

Abnormal

46±3"

Open or short

Measure the resistance between the terminals with a tester. (Surrounding temperature 20:)

Normal

1450±150"

Abnormal

Open or short

Solenoid valve coil <Bypass valve> (SV) For P100

Refer to next page.

Fan motor(MF1,MF2)

1500±150" 1435±150"

P125,P140

P100

0.88"

0.266"

Measure the resistance between the terminals with a tester. (Winding temperature 20

)

Normal Abnormal

Open or short

11-6. HOW TO CHECK THE PARTS PUHZ-P100VHA.UK PUHZ-P125VHA.UK PUHZ-P140VHA.UK PUHZ-P100VHA

1.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

Page 50

Check method of DC fan motor (fan motor / outdoor controller circuit board)

Notes

· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give attention to the service.

· Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor controller circuit Self check

Symptom : The outdoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNF1, CNF2)

board and fan motor.)

Is there no contact failure?

Yes

Power supply check

Measure the voltage in the outdoor controller circuit

TEST POINT

1 :VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC280-380V

Wiring recovery

board.

TEST POINT 2 :VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V TEST POINT 3 :VSP (between 6 (+) and 4 (-) of the fan connector): VSP DC1 to 6.5V

The voltage of V

[ ]

In the case that the fan motor off, the voltages is 0V.

Is the voltage normal?

Fan motor position sensor signal check

Measure the voltage at the TEST POINT 4 (V of the fan connector, while slowly turning the fan motor more than one revolution.

SP is a value during the fan motor operation.

Yes

Trouble of the outdoor controller circuit board Replacement of the outdoor controller circuit board

FG), between 7 (+) and 4 (-)

Trouble of the fan motor

Dose the voltage repeat DC0V and DC15V?

Yes

Replacement of the motor

Replacement of the outdoor controller circuit board

Page 51

11-7. HOW TO CHECK THE COMPONENTS

-20-1001020304050 Temperature (:)

Resistance (k")

200

150

100

25 50 75 100 125

Temperature (:)

Resistance (k")

500

400

300

200

100

50 75 100 120

Temperature (:)

Resistance (k")

Low temperature thermistors

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Outdoor 2-phase pipe> (TH6)

• Thermistor <Outdoor> (TH7) Thermistor R0 = 15k' ±3%

B constant = 3480 ± 2%

t =15exp{3480(

0: 15k' 10: 9.6k' 20: 6.3k' 25: 5.2k'

Medium temperature thermistor

• Thermistor <Heat sink> (TH8)

273+t – 273

30: 4.3k' 40: 3.0k'

)}

Thermistor R50 = 17k' ±2% B constant = 4150 ± 3%

t =17exp{4150(

273+t – 323

)}

0: 180k' 25: 50k' 50: 17k' 70: 8k' 90: 4k'

High temperature thermistor

• Thermistor <Discharge> (TH4) Thermistor R120 = 7.465k' ±2%

B constant = 4057 ± 2%

t =7.465exp{4057(

R 20: 250k'

30: 160k' 40: 104k' 50: 70k' 60: 48k'

273+t – 393

70: 34k' 80: 24k' 90: 17.5k' 100: 13.0k' 110: 9.8k'

)}

Page 52

Open

Extra tightning (about 32 pulse)

Pulse number

500 pulse Opening a valve all the way

Valve position (capacity)

LEV

Gray

Orange

Red

Yellow

Black

Connector LEV-A

DC12V

Outdoor controller board

Drive circuit

Linear expansion valve

ON OFF OFF OFF

ON OFF OFF

OFF

ON OFF OFF

OFF

ON ON

OFF

Output

(Phase)

Output

[2 [3

234

5678

OFF OFF

OFF

OFF OFF

ON ON

OFF OFF OFF

ON OFF OFF

(1) Operation summary of the linear expansion valve

• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the outdoor controller board.

• Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve>

(2) Linear expansion valve operation

Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8

Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1

The output pulse shifts in above order. ❈ 1. When linear expansion valve operation stops, all output phase

become OFF.

❈ When the switch is turned on, 700 pulse closing valve signal will

be sent till it goes to

A point in order to define the valve position.

(The pulse signal is being sent for about 20 seconds.)

When the valve moves smoothly, there is no noise or vibration occurring from the linear expansion valve : however, when the pulse number moves from B to A or when the valve is locked,

more noise can be heard than normal situation. No noise is heard when the pulse number moves from B to A in case coil is burn out or motor is locked by open-phase.

❈ Noise can be detected by placing the ear against the screw dri-

ver handle while putting the screw driver to the linear expansion

valve.

Page 53

(3) How to attach and detach the coil of linear expansion valve

<Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below.

Stopper

Coil

Lead wire

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward. Be sure to detach the coil holding main body firmly. Otherwise pipes can bend due to pressure.

Main body

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and attach the coil by inserting it downward into the main body. Then securely attach the coil stopper to main body. (At this time, be careful that stress is not added to lead wire and main body is not wound by lead wire.) If the stopper is not firmly attached to main body, coil may be detached from the main body and that can cause defective operation of linear expansion valve. To prevent piping stress, be sure to attach the coil holding the main body of linear expansion valve firmly. Otherwise pipe may break.

Be sure to attach the stopper.

Page 54

11-8. EMERGENCY OPERATION

SW4

1 2 Cooling

Heating

OFF

CN31

Shorting pins

SW4

1 2 Cooling

Heating

Inspected content Open/short of pipe thermistor (TH3/TH6) Indoor/outdoor unit communication error •Signal receiving error (Outdoor unit) Indoor/outdoor unit communication error •Transmitting error (Indoor unit) Communication error other than outdoor unit Communicaiton error between outdoor controller board and M-NET board (Serial communication error)

Error code

U4 E8 E9

E0 ~ E7

●When following abnormalities occur, emergency operation will be available.

(1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor

unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

(2) Check the following items and cautions for emergency operation

1Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will

not be available when error code other than the above are indicated.)

2For emergency operation, it is necessary to set the emergency operation switch (SWE) on indoor controller board. Refer

to the electrical wiring diagram of indoor unit for how to set the indoor unit.)

3During emergency operation, the air-conditioner will continuously be operated by supplying power and stopping it: It can

not be turned on or off by remote control, and temperature control is not possible.

4Do not perform emergency heating operation for an extended period of time: If the outdoor unit starts defrosting during

this period, cold air will blow out from the indoor unit.

5Do not perform emergency cooling operation for more than 10 hours: Neglecting this could result in freezing the heat

exchanger in indoor unit.

(3) Emergency operation procedure

1Turn the main power supply off. 2Turn on the emergency operation switch (SWE) on indoor controller board. 3Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON. 4Use SW4-2 on outdoor controller board to set the operation mode (cooling or heating). (SW4-1 is not used.)

5Turning the main power supply on will start the emergency operation.

(4) Releasing emergency operation

1Turn the main power supply off. 2Set the emergency operation switch (SWE) on indoor controller board to OFF. 3Set the shorting pins of emergency operation connector (CN31) on outdoor controller

board to OFF.

4Set SW4-2 on outdoor controller board as shown in the right.

wIf shorting pins are not set on emergency operation connector (CN31), the setting remains OFF.

Page 55

(5) Operation data during emergency operation

Operation data

Intake temperature (TH1) Indoor liquid pipe temperature (TH2) Indoor 2-phase pipe temperature (TH5) Set temperature Outdoor fluid pipe temperature (TH3) Outdoor 2-phase pipe temperature (TH6) Outdoor air temperature (TH7) Temperature difference code (intake temperature - set temperature) (∆Tj) Discharge super heat (SHd) Sub-cool (SC)

Operation mode

COOL

27:

5: 25: 45: 50: 35:

30deg

5deg

HEAT

20.5: 45: 50: 22:

5: 5: 5:

30deg

5deg

(w1) (w1) (w1)

(w2) (w2)

Remarks

w1: If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.

If the unit enters emergency operation because TH values have become mismatched, setting the thermistors to open/short corrects the settings.

w2: If one thermistor is set to open/short, the values for each will be different.

[Example] When liquid temperature thermistor (TH3) has an open or short circuit.

COOL

45:

5: 5:

HEAT

50: 45:

Thermistor

TH3

TH6

TH5 TH2

Regard normal figure as effective data.

Degree of subcooling (SC) Cooling = TH6- TH3 = Ta -45 Heating = TH5- TH2 = 50 - 45 = 5 deg.

During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values:

Page 56

11-9. TEST POINT DIAGRAM

<CAUTION> TEST POINT1 is high voltage.

Outdoor controller circuit board PUHZ-P100VHA.UK PUHZ-P125VHA.UK PUHZ-P140VHA.UK PUHZ-P100VHA

Communication power supply ZD71 Voltage developed across: 16-30V DC

1.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

CNS

(Indoor/outdoor unit

connecting wire)

VCC (TEST POINT 2)

(voltage between pins of C6B): DC 15V

63H

High pressure switch

VDC (TEST POINT 1)

(voltage between pins of C5E)

: 280V-380V DC

CNDC

280V-380V DC

Connect from out-

}

door power circuit

–

board

CNAC

–

2 to 4: Power supply for outdoor controller circuit board (220V-240V AC) 1 to 3: Power supply for indoor and outdoor unit connection wire (220V-240V AC)

CN2

Connect to the outdoor power circuit board (CN2) 1-5: Power circuit board

Transmitting signal to the controller circuit board (0-5V DC) 2-5: Zero cross signal

(0-5V DC)

3-4: 18V DC 6-5: 16V DC 7-5: 16V DC

➔

[5: – 1,2,6,7: + ]

52C(VHA type)

21S4

Four-way valve

SV2

Bypass valve (P100 only)

VSP (TEST POINT 3)

(voltage between pins of C5A, C5B): DC 0V (when stopped), DC 1– 6.5V (when operated)

VFG (TEST POINT 4)

(voltage between right pins of PC5C and PC5D, pin 3 and pin 4)

TH6

Thermistor <Outdoor 2-phase pipe>

TH7

Thermistor<Outdoor>

TH3

Thermistor <Outdoor pipe>

TH4

Thermistor <Discharge>

LEV-A

Linear expansion valve

CN4

Transmission to outdoor power circuit board (CN4)

CN52C

(VHA1 only)

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CNDM

1 to 2: Input of silent mode 1 to 3: Input of external

contact point

SW10

Model select

SW9

SWP

pump down

SW4

Test operation

SW5

Function switch

SW6

Model select

SW1

Forced defrost, detect history record reset, refrigerant address

SW7

Demand control setting

Page 57

Outdoor noise filter circuit board PUHZ-P100VHA.UK PUHZ-P125VHA.UK PUHZ-P140VHA.UK

LO, NO Voltage of 220-240V AC is output (Connect to the outdoor power circuit board (TABS, TABT))

CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC))

EI Connect to the earth

CN5 Primary current (Connect to the outdoor power circuit board (CN5))

LI, NI Voltage of 220-240V AC is input (Connect to the terminal block(TB1))

Page 58

Outdoor noise filter circuit board PUHZ-P100VHA1.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

CNAC1, CNAC2 220-240V AC (Connect to the outdoor controller circuit board (CNAC))

CN52C 52C driving signal (Connect to the outdoor controller circuit board (CN52C).)

LO, NO Voltage of 220-240V AC is output (Connect to the outdoor power circuit board (TABS, TABT))

EI Connect to the earth

E2 Connect to the earth.

CN5 Primary current (Connect to the outdoor power circuit board (CN5))

LI, NI Voltage of 220-240V AC is input (Connect to the terminal block(TB1)).

Page 59

Outdoor power circuit board PUHZ-P100VHA.UK PUHZ-P125VHA.UK PUHZ-P140VHA.UK PUHZ-P100VHA1.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

Brief Check of POWER MODULE

W Usually, they are in a state of being short-circuited if they are broken. Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.

1. Check of diode bridge (DS2, DS3)

TABP1-TABS, TABN1-TABS, TABP1-TABT,TABN1-TABT

2. Check of DIP-IPM

P-U, P-V, P-W, N-U, N-V, N-W

CN2 Connect to the outdoor controller circuit board (CN2) 1-5:Transmitting signal to the outdoor

controller circuit board (0~5V DC)

2-5:Zero cross signal (0~5V DC) 3,4:18V DC 6-5:16V DC 7-5:16V DC

CN3 Thermistor (TH8) <Heat sink>

CN5 Detection of primary current Connect to the outdoor noise filter circuit board (CN5)

CN4 Connect to the outdoor controller circuit board (CN4)

CNAF Connect to ACTM

DIP-IPM

CNDC 280-380V DC (1+, 3–)

Connect to the outdoor controller circuit board

TABS/TABT Connect to the outdoor noise filter circuit board Voltage among phases: 220-240V AC

TABP1 Connect to 52C

TABN1 Connect to ACTM

TABP2/SC-P2 Connect to ACTM

TABN Connect to the smoothing capacitor CB –

TABP Connect to the smoothing capacitor CB +

TABU/V/W Connect to the compressor (MC) Voltage among phases:10V~180V AC

TABN2 Connect to ACTM

Page 60

11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

1 2 3

3 4 5 6 1 2 3 1 2

ON OFF

No.

Function Effective timing

Action by the switch operation

No function

Power failure

automatic recovery w1

No function No function

Max Hz setting (cooling) Max Hz setting (heating)

Defrost Hz setting

No function

Use of existing pipe

No function No function No function No function

Pump down

Switch

SW5

SW7

Dip

switch

SW8

SW9

Push

switch

SWP

Type of

Switch

—

Auto recovery

— —

Max Hz(cooling)

o 0.8

Max Hz(heating)

o 0.8

Defrost Hz

o 0.8

—

Used

— — — —

Start

—

No auto recovery

— —

Normal Normal Normal

—

Not used

— — — —

Normal

—

When power supply ON

— —

Always

Always Always Always

—

Always

— — — —

Under suspension

Setting of demand control

SW7-1 SW7-2

OFF

0% (Operation stop)

75%

50%

OFF

OFF OFF

Power consumption (Demand switch ON)

(1) Function of switches

Type

switch

Dip

switch

Switch

SW1

SW4

No.

1 2

Refrigerant address setting

1 2

Function Effective timing

Compulsory defrosting Start Normal Abnormal history clear

123

Test run Operating OFF

Test run mode setting Heating Cooling

Compulsory defrosting should be done as follows.

1Change the DIP SW1-1 on the outdoor controller board from OFF to ON. 2Compulsory defrosting will start by the above operation 1 if these conditions written below are satisfied.

• Heat mode setting

• 10 minutes have passed since compressor started operating or previous compulsory defrosting finished.

• Pipe temperature is less than or equal to 8:. 3Compulsory defrosting will finish if certain conditions are satisfied. wCompulsory defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.

After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again. This

depends on the service conditions.

Action by the switch operation

ON OFF

When compressor is working in heating operation. w

Clear Normal off or operating

456ON123456ON123456ON123456

0123

456ON123456ON123456ON123456

4567

456ON123456ON123456ON123456

891011

456ON123456ON123456ON123456

12 13 14 15

When power supply ON

Under suspension

w1 ‘Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON,

‘Auto recovery’ activates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW.

Please refer to the indoor unit installation manual.

w2 SW7-1,2 are used for demand control. SW7-1,2 are effective only at the demand control.

(Refer to next page : Special function (b))

w3 Please do not use SW7-3~6 usually. Trouble might be caused by the usage condition.

Page 61

(2) Function of connectors and switches

CN31

Types

Connector

Switch

Function Effective timing

Connector

SW6

SW10

SW6-1 SW6-2 SW6-3 SW6-4 SW6-5 SW6-6

SW10-1 SW10-2

Start

Short Open

Action by open/ short operation

Model select

Emergency operation

When power supply ON

Normal

MODEL

SW6 SW10

MODEL

SW6 SW10

123456

OFF

100V

OFF

123456

OFF

125V

OFF

123456

OFF

140V

OFF

CNDM

SW1

Max. 10 m including local wiring

SW1 : Switch X : Relay (Contact spec. : DC1mA)

Relay supply

Red

Brown

Orange

3 2

Purchased at local

Adaptor for external signal input (PAC-SC36NA)

Outdoor unit controller board

3 2 1

Insulate this point securely as this is not used.

<Low-level sound priority mode circuit>

Special function

(a) Low-level sound priority mode (Local wiring)

Unit enters into Low-level sound priority mode by external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency. W The performance depends on the load of conditioned outdoor temperature.

How to wiring

1) Make the circuit as shown above with Adaptor for external signal input(PAC-SC36NA).

2) Turn SW1 to on for Low-level sound priority mode. Turn SW1 to off to release Low-level sound priority mode and normal operation.

(b) On demand control (Local wiring)

Demand control is available by external input. In this mode, power consumption is decreased within the range of usual 0~100%.

How to wiring Basically, the wiring is same with (a). Connect an SW 1 which is procured at field to the between Orange and Red(1 and 3) of the Adaptor for external signal input(PAC-SC36NA), and insulate the tip of the brown lead wire.

It is possible to set it to the following power consumption (compared with ratings) by setting the SW7-1, 2.

SW7-1 SW7-2

OFF ON OFF

OFF OFF

Power consumption

(SW1 on)

0% (Operation stop)

50% 75%

Page 62

—

E6 E7

—

E0 E3 E4 E5 EF

A0~A8

[Display] (1) Normal condition

(2) Abnormal condition

Unit condition

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

When the power is turned on When unit stops When compressor is warming up When unit operates

Lighted Lighted Lighted Lighted

Lighted

Not lighted

Indication of the display

Alternately blinking display

Operation mode

Not lighted

Lighted

00, etc. 08, etc.

C5, H7 etc.

Indication Error

Error code

Outdoor controller board

Contents Inspection method

LED1 (Green) LED2 (Red) 1 blinking 2 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

Connector(63H) is open.

Startup time over

Error code is not defined.

Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)

Mis-wiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)

Indoor/outdoor unit communication error (signal receiving error) is detected by indoor unit.

Indoor/outdoor unit communication error (transmitting error) is detected by indoor unit.

Indoor/outdoor unit communication error (signal receiving error) is detected by outdoor unit.

Indoor/outdoor unit communication error (transmitting error) is detected by outdoor unit.

Remote controller signal receiving error is detected by remote controller.

Remote controller transmitting error is detected by remote controller.

Remote controller signal receiving error is detected by indoor unit.

Remote controller transmitting error is detected by indoor unit.

Serial communication error <Communication between outdoor controller board and outdoor power board> <Communication between outdoor controller board and M-NET p.c. board>

Communication error of high prior signal(M-NET)

W1.Error code is displayed on remote controller. W2.Refer to service manual for indoor unit.

Check if indoor/outdoor connecting wire is connected correctly.

Check if 4 or more indoor units are connected to outdoor unit. 3Check if noise entered into indoor/outdoor connecting wire or power supply.

4Re-check error by turning off power, and on again.

Check if connector (63H) on the outdoor controller board is not disconnected.

Check continuity of pressure switch (63H) by tester.

Check if connector (CN4) on outdoor controller board and outdoor power board is not disconnected.

Check if there is poor connection of connector on outdoor controller board(CNMNT and CNVMNT).

Check M-NET communication signal.

1Check if remote controller is MA remote controller(PAR-21MAA). 2Check if noise entered into transmission wire of remote controller. 3Check if noise entered into indoor/outdoor connecting wire. 4Re-check error by turning off power, and on again.

1Check if connecting wire of indoor unit or remote controller

is connected correctly. 2Check if noise entered into transmission wire of remote controller.

3Re-check error by turning off power, and on again.

Check if indoor/outdoor connecting wire is connected correctly.

Check if noise entered into indoor/outdoor connecting wire or power supply.

Check if noise entered into indoor/outdoor controller board.

Re-check error by turning off power, and on again.

P.29

P.30 (EA) P.30

(Eb)

P.30 (EC)

w2 w2

P.35

(E8)

P.35

(E9)

P.34 P.35 P.34 P.35 P.35

P.35

P.36~

P.39

Detailed

reference

page

The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector CNM on outdoor controller board.

Page 63

Indication Error

Outdoor controller board

LED1 (Green) 3 blinking 1 blinking

LED2 (Red)

Abnormality of shell thermostat and discharging temperature (TH4)

2 blinking

Abnormal high pressure (High pressure switch 63H worked.)

3 blinking

Abnormality of outdoor fan motor rotational speed

Protection from overheat operation (TH3)

4 blinking

Compressor over current breaking (Start-up locked) Compressor over current breaking Abnormality of current sensor (P.B.) Abnormality of power module

5 blinking

Open/short of discharge thermistor (TH4) Open/short of outdoor thermistors

Contents Inspection method

Error code

1Check if stop valves are open.

2Check if connectors (TH4, LEV-A) on outdoor controller board are not disconnected.

3Check if unit fills with specified amount of refrigerant. 4Measure resistance values among terminals on indoor valve and outdoor linear

expansion valve using a tester.

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Check if connector (63H) on outdoor controller board is not disconnected. 3Check if heat exchanger and filter are not dirty. 4Measure resistance values among terminals on linear expansion valve using a

tester. 1Check the outdoor fan motor.

2Check if the connector of TH3 on outdoor controller board is disconnected.

1Check if stop valves are open.

2Check looseness, disconnection, and converse connection of compressor wiring.

3Measure resistance values among terminals on compressor using a tester. 4Check if outdoor unit has a short cycle on its air duct.

Check if connectors (TH3, TH4, TH6 and TH7) on outdoor controller board and conn-

ector (CN3) on outdoor power board are not disconnected.

Measure resistance value of outdoor thermistors.

(TH3, TH6, TH7 and TH8)

Detailed

reference

page

P.31

P.33

P.33 P.34 P.33 P.32 P.32 P.32

6 blinking

Abnormality of radiator panel temperature

4 blinking

7 blinking

1 blinking

Abnormality of voltage 1Check looseness, disconnection, and converse connection of compressor wiring.

Abnormality of room temperature thermistor (TH1) Abnormality of pipe temperature thermistor /Liquid (TH2) Abnormality of pipe temperature thermistor/Condenser-Evaporator

2 blinking

Abnormality of drain sensor (DS) Indoor drain overflow protection

3 blinking

Freezing (cooling)/overheating (heating) protection

4 blinking

Abnormality of pipe temperature

W1 Error code displayed on remote controller W2 Refer to service manual for indoor unit.

1Check if indoor/outdoor units have a short cycle on their air ducts.

2Measure resistance value of outdoor thermistor(TH8).

2Measure resistance value among terminals on compressor using a tester. 3Check the continuity of contactor (52C). 4Check if power supply voltage decreases. 5Check the wiring of CNAF.

1Check if connectors (CN20, CN21 and CN29) on indoor controller board are not

disconnected.

2Measure resistance value of indoor thermistors.

1Check if connector (CN31) on indoor controller board is not disconnected.

2Measure resistance value of indoor thermistors.

3Measure resistance value among terminals on drain-up machine using a tester. 4Check if drain-up machine works. 5Check drain function.

1Check if indoor unit has a short cycle on its air duct. 2Check if heat exchanger and filter is not dirty. 3Measure resistance value on indoor and outdoor fan motors. 4Check if the inside of refrigerant piping is not clogged.

1Check if indoor thermistors (TH2 and TH5) are not disconnected from holder.

2Check if stop valve is open. 3Check converse connection of extension pipe. (on plural units connection) 4Check if indoor/outdoor connecting wire is connected correctly. (on plural units

connection)

P.32 P.33

W2 W2 W2

Page 64

1ON23456

1 second

interval

Display Operation Model

The tens digit : Operation mode

The ones digit : Relay output

O C H

Display

0 1 2 3 4 5 6 7 8

Compressor

Warming-up

Compressor

4-way valve

Solenoid valve

— — —

— ON ON ON ON

—

— — — — — — —

— ON ON

—

— ON ON

—

— ON ON

— ON

—

— —

OFF / FAN

COOLING / DRY w

HEATING

DEFROSTING

Display Contents to be inspected (When power is turned on)

F5 E8 E9 EA Eb EC

E0~E7

63H connector(yellow) is open. Indoor/outdoor communication error (Signal receiving error) (Outdoor unit) Indoor/outdoor communication error (Transmitting error) (Outdoor unit) Mis-wiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more) Mis-wiring of indoor/outdoor unit connecting wire(converse wiring or disconnection) Startup time over Communication error except for outdoor unit

Display

Inspection unit 0 1 2 3

Outdoor unit Indoor unit 1 Indoor unit 2 Indoor unit 3

Display Contents to be inspected (During operation)

U1 U2 U3 U4 U5 U6 U8 Ud UF UH UL

UP P1~P8 A0~A7

Abnormal high pressure (63H worked) Abnormal high discharging temperature, shortage of refrigerant Open/short circuit of discharging thermistor(TH4) Open/short of outdoor unit thermistors(TH3, TH6, TH7 and TH8) Abnormal temperature of heat sink Abnormality of power module Abnormality in outdoor fan motor Over heat protection Compressor overcurrent interruption (When Comp. locked) Current sensor error Abnormal low pressure Compressor overcurrent interruption Abnormality of indoor units Communication error of high-prior signal (M-NET)

[When option part ‘A-Control Service Tool(PAC-SK52ST)’is connected to outdoor controller board(CNM)]

Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by controlling DIP SW2 on ‘A-Control Service Tool’.

Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

Display detail

Explanation for display Unit

(Be sure the 1 to 6 in the SW2 are set to OFF.) (1) Display when the power supply ON.

When the power supply ON, blinking displays by turns. Wait for 4 minutes at the longest.

(2) When the display lights. (Normal operation)

1Operation mode display.

(Lighting)

LED1

wC5 is displayed during replacement

operation.

2Display during error postponement

Postponement code is displayed when compressor stops due to the work of protection device. Postponement code is displayed while error is being postponed.

(3) When the display blinks

Inspection code is displayed when compressor stops due to the work of protection devices.

SW2

(Initial setting)

Page 65

SW2 setting

1ON23456

1ON23456 1ON23456

1ON23456

Display detail

Pipe temperature / Liquid(TH3) – 40~90

Explanation for display Unit

– 40~90 (When the coil thermistor detects 0

and temperature are displayed by turns.)

(Example) When -10:;

0.5 secs. 0.5secs. 2 secs.

: or below, “–”

Discharge temperature (TH4) 3~217

Output step of outdoor FAN 0~10

The number of ON / OFF times of compressor 0~9999

Compressor integrating operation times 0~9999

Compressor operating current 0~50

3~217 (When the discharge thermistor detects 100: or

more, hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 105:;

0.5 secs. 0.5secs. 2 secs.

0~10

0~9999 (When the number of times is 100 or more,

hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 42500 times (425

✕100 times);

0.5 secs. 0.5secs. 2 secs.

0~9999 (When it is 100 hours or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 2450 hours (245 ✕10 hours);

0.5 secs. 0.5secs. 2 secs.

0~50 wOmit the figures after the decimal fractions.

Step

100 times

10 hours

Compressor operating frequency 0~225

0~255 (When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

LEV-Aopening pulse 0~480

0~480 (When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.

(Example) When 150 pulse;

0.5 secs. 0.5secs. 2 secs.

Error postponement code history (1) of outdoor unit

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

Operation mode on error occurring Operation mode of when operation stops due to

error is displayed by setting SW2 like below.

(SW2)

Pulse

Code

display

Code

display

Page 66

SW2 setting

1ON23456

1ON23456 1ON23456

1ON23456

1302

Display detail

Pipe temperature / Liquid(TH3) on error occurring – 40~90

Explanation for display Unit

– 40~90 (When the coil thermistor detects 0: or below, “–”

and temperature are displayed by turns.)

(Example) When –15:;

0.5 secs. 0.5secs. 2 secs.

Compressor temperature (TH4) or discharge temperature (TH4) on error occurring 3~217

Compressor operating current on error occurring 0~20

Error code history (1) (latest) Alternate display of abnormal unit number and code

Error code history (2) Alternate display of error unit number and code

3~217 (When the temperature is 100: or more, the

hundreds digit, tens digit and ones digit are displayed by turns.)

(Example) When 130:;

0.5 secs. 0.5secs. 2 secs.

0~20

When no error history, “ 0 ” and “– –” are displayed by turns.

Code

display

Code

display

Thermostat ON time 0~999

Test run elapsed time 0~120

0~999 (When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 245 minutes;

0.5 secs. 0.5secs. 2 secs.

0~120 (When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)

(Example) When 105 minutes;

0.5 secs. 0.5secs. 2 secs.

Minute

Page 67

SW2 setting

1ON23456

Capacity

P100V P125V P140V

Code

20 25 28

Setting details

• The tens digit (Total display for applied setting)

• The ones digit

H·P /

Cooling only

Single phase / Three phase

Display details

0 : H·P 1 : Cooling only 0 :

Single phase

2 :

Three phase

Setting details

Defrosting switch

Display details

0 : Normal 1 : For high humidity

1ON23456

Display detail

The number of connected indoor units

Explanation for display

0~3 (The number of connected indoor units are displayed.)

Unit

Capacity setting display

Outdoor unit setting information

Indoor pipe temperature / Liquid (TH2(1)) Indoor 1 – 39~88

Displayed as an outdoor capacity code.

(Example) When heat pump,three phase and

defrosting (normal) are set up, “20” is displayed.

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

Code

display

Code

display

Indoor pipe temperature / Cond. / Eva. (TH5(1)) Indoor 1 – 39~88

Indoor pipe temperature / Liquid (TH2(2)) Indoor 2 – 39~88

Indoor pipe temperature / Cond. / Eva. (TH5(2)) Indoor 2 – 39~88

Indoor room temperature (TH1) 8~39

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

– 39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

8~39

Page 68

1ON23456

SW2 setting

1ON23456

Display detail

Indoor setting temperature 17~30

Explanation for display Unit

17~30

1ON23456

Outdoor pipe temperature / Cond./ Eva. (TH6)

-39~88

Outdoor outside temperature (TH7)

-39~88

Outdoor heat sink temperature (TH8)

-40~200

Discharge super heat. SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Sub cool. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH4

-39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

-39~88 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

-40~200 (When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

(When the thermistor detects 100: or more,

hundreds digit, tens digit and ones digit are displayed by turns.)

0~255 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

0~130 (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

°C

Input current of outdoor unit

Targeted operation frequency 0~255

DC bus voltage 180~370

0~500 (When it is 100 or more, hundreds digit, tens digit

and ones digit are displayed by turns.)

0~255 (When it is 100Hz or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

180~370 (When it is 100V or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

0.1 A

Page 69

SW2 setting

1ON23456

Display detail

Capacity save 0~100 When air conditioner is connected to M-NET and capacity save mode is demanded, “0”~”100” is displayed.

When there is no setting of capacity save “100” is displayed.

Error postponement code history (2) of outdoor unit

Explanation for display Unit

0~100 (When the capacity is 100% hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 100%;

0.5 secs. 0.5secs. 2 secs.

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

Code

display

Error postponement code history (3) of outdoor unit

Error code history (3) (Oldest) Alternate display of abnormal unit number and code.

Error thermistor display

When there is no error thermistor, “–“ is displayed.

Operation frequency on error occurring 0~255

Postponement code display Blinking: During postponement Lighting: Cancellation of postponement “00” is displayed in case of no postponement.

When no error history, “0” and “– –“ are displayed by turns.

3: Outdoor pipe temperature /Liquid (TH3) 6: Outdoor pipe temperature /Cond./Eva. (TH6) 7: Outdoor outside temperature (TH7) 8: Outdoor radiator panel (TH8)

0~255 (When it is 100Hz or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 125Hz;

0.5 secs. 0.5secs. 2 secs.

Code

display

Code

display

Code

display

Fan step on error occurring 0~10

0~10

Step

Page 70

SW2 setting

1ON23456

Display detail

LEV-Aopening pulse on error occurring 0~480

Explanation for display Unit

0~480 (When it is 100 pulse or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 130 pulse;

0.5 secs. 0.5secs. 2 secs.

Pulse

Indoor room temperature (TH1) on error occurring 8~39

Indoor pipe temperature / Liquid (TH2) on error occurring

-39~88

Indoor pipe temperature / Cond./ Eva. (TH5) on error occurring

-39~88

Outdoor pipe temperature / Cond./ Eva. (TH6) on error occurring

-39~88

8~39

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

Outdoor outside temperature (TH7) on error occurring

-39~88

Outdoor heat sink temperature (TH8) on error occurring

-40~200

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(Example) When –15°C;

0.5 secs. 0.5secs. 2 secs.

-40~200 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

Page 71

SW2 setting

1ON23456

Normal Overvoltage error Undervoltage error Input current sensor error L1-phase open error Abnormal power synchronous signal PFC/ ACTM errorUndervoltage

W Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A

Power circuit board Controller circuit board

Controller circuit board Power circuit board

Check CNAF wiring. Defective ACTM/ P.B.

—

Description Detection point Display

00 01 02

04 08 20

Display detail

Discharge super heat on error occurring SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Explanation for display Unit

0~255 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

(Example) When 150°C;

0.5 secs. 0.5secs. 2 secs.

Sub cool on error occurring. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH2

Thermostat-on time until error stops 0~999

Indoor pipe temperature / Liquid (TH2 (3)) Indoor 3

-39~88

Indoor pipe temperature / Cond./ Eva. (TH5 (3)) Indoor 3

-39~88

0~130 (When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by turns.)

(Example) When 115°C;

0.5 secs. 0.5secs. 2 secs.

0~999 (When it is 100 minutes or more, hundreds digit, tens

digit and ones digit are displayed by turns.)

(Example) When 415 minutes;

0.5 secs. 0.5secs. 2 secs.

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

-39~88 (When the temperature is 0°C or less, “–” and

temperature are displayed by turns.)

When there is no indoor unit, “00” is displayed.

Minute

U9 Error status during the Error postponement period

Code

display

Page 72

12 FUNCTION SETTING

12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

Each function can be set according to necessity using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)

W1 The functions below are available only when the wired remote controller is used.The functions are not available for floor

standing models.

<Table 1> Function selections

Function

Power failure automatic recovery Indoor temperature detecting

LOSSNAY connectivity

Power supply voltage Auto operating mode Frost prevention temperature Humidifier control

Change of defrosting control

Settings

OFF ON Operating indoor units (The average is considered as indoor temperature.) Indoor unit with remote controller Remote controller's internal sensor w1 Not supported Supported (indoor unit not equipped with outdoor air intake) Supported (indoor unit equipped with outdoor air intake) 240V 220V,230V Auto energy-saving operation ON Auto energy-saving operation OFF 2: (Normal) 3: When the compressor operates, the humidifier also operates. When the fan operates, the humidifier also operates. Standard For high humidity

Mode No.

04 05 15 16 17

Setting No.

1 2

3 1 2 3 1 2 1 2 1 2 1 2 1 2

(2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller)

• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the indoor unit number.

• When setting functions for a simultaneous- Twin Triple indoor unit system, set the unit number to 01 to 03 for each indoor

unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number.

• When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, set refrigerant address to AL

(07 in case of wireless remote controller) referring to 4 setting the indoor unit number.

Mode

Function Settings

Filter sign 100Hr 1

Air flow Quiet Standard 1 - - - (

Fan speed

No.of air outlets 4 directions 1 - - - - -

Optional high efficiency filter Supported Vane setting

Energy saving air Disabled flow (Heating mode Optional humidifier Not supported (

PLA-AA only Vane differential setting No.1 setting (TH5: 24-28: in heating mode No.2 setting (Standard, TH5:28-32: (

cold wind prevention)No.3 setting (TH5: 32-38: Swing Not available

Set temperature in heating mode (4 deg up Fan speed when the Extra low 1 heating thermostat is OFF

Quiet operation mode Disabled (Standard of PLA-AA(2)(Fan speed)Enabled (Quiet operation mode Fan speed when the cooling thermostat is OFF Stop Detection of abnormality of the pipe temperature (P8)Not available

)

2500Hr 07 2

No filter sign indicator

Standard High ceiling

3 directions 09 2 - - - - 2 directions Not supported

No vanes Vane No.1 setting Vane No.2 setting

)

Enabled Supported

Available Available Not available

Stop Set fan speed

Set fan speed Available

High ceiling1 High ceiling2

(Vane No.3 setting : PLA-AA(2) only

)

) )

PLA-AA(2)

}

)

Setting

No.

08 2 - - - -

11 2 - - - -

12 13

14 2 - - -

23 24

25 2

26 27 28

4-Way

cassette

PLA-AA(2)

3----

3----1 2

1---3----

1 2 1 2 1-- -

3-- 1 2 1 2

3 1 2 1 2 1 2

Ceiling

concealed

PEAD-EA(2)

PEAD-GA

----

-----

---

-----

Initial setting

(when sent from the factory)

Initial setting (Factory setting

- : Not available

Ceiling suspended

PCA-GA(2)

PCA-HA

PKA-FAL(2)

Remarks

The setting is applied to all the units in the same refrigerant system.

)

Wall

mounted

PKA-GAL

Floor

standing

PSA-GA

Page 73

12-1-1. Selecting functions using the wired remote controller

First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps 1 to 0 .

Modes 01 to 14 can be activated by pressing buttons

and

simultaneously, and modes 15 to 28 by pressing buttons

and J.

The above procedure must be carried out only if changes are necessary.

Setting number

Refrigerant address Unit number

Mode number

Selecting functions using the wired remote controller

Check the function selection setting.

Switch to function setting mode.

(Press

and B at the same time

with the remote controller stopped.)

Specify refrigerant address 00 (outdoor unit)

Specify unit No. 00. (indoor unit)

(Use

and D.)

Enter the setting.

(Press

Select mode No. 02

(Specified indoor unit: BLOW operation)

(room temperature detection position).

Select setting No. 03 (remote controller fixed).

(Use

and G.)

Enter the setting.

(Press

Example: Selecting room temperature detection position

Finished

YES

For modes 15 and higher,

and B at the same time.

press

YES

Change refrigerant address or unit No.

Ending function display

(Press

and B at the same time.)

Page 74

[Operating Procedure]

1 Check the setting items provided by function selection.

If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps 2 to 7 , fill in the "Check" column in Table 1, and then change them as necessary. For factory settings, refer to the indoor unit's installation manual.

2 Switch off the remote controller.

A Hold down the ( mode is 15 to 28)and B

buttons simultaneously for atleast two seconds. will start to blink, and then the remote controller's display content will change as shown below.

3 Set the outdoor unit's refrigerant address.

C Press the [

CLOCK] buttons ( and ) to select the desired

refrigerant address. The refrigerant address changes from "00" to "15" . (This operation is not possible for single refrigerant systems.)

* If the unit stops after

blinked for two seconds or "88" blinks in the room temperature display area for two seconds, a transmission error may have occurred.

Check to see if there are any sources of noise or interference near the transmission path. Note

If you have made operational mistakes during this procedure, exit function selection (see step 0 ), and then restart from step 2.

4 Set the indoor unit number.

D Press the

button so that " - -" blinks in the unit number display

area.

C Press the [

CLOCK] buttons ( and ) to select the unit number

of the indoor unit for which you want to perform function selection. The unit number changes to "00", "01", "02","03",04" and "AL" each time a button is pressed.

* To set modes 01 to 06 or 15 to 22 select unit number "00". * To set modes 07 to 14 or 23 to 28 carry out as follows:

• To set each indoor unit individually, select "01" to "04".

• To set all the indoor units collectively, select "AL".

5 Confirm the refrigerant address and unit number.

E Press the

button to confirm the refrigerant address and unit number. After a while, "- - " will start to blink in the mode number display area.

E When the refrigerant address and unit number are confirmed by pressing the

button, the corresponding indoor unit will start fan operation. This

helps you find the location of the indoor unit for which you want to perform function selection. However, if "00" or "AL" is selected as the unit number, all the indoor units corresponding to the specified refrigerant address will start fan operation.

* "88" will blink in the room temperature display area if the selected refrigerant

address does not exist in the system. Furthermore, if

"F"

appears and blinks in the unit number display area and the refrigerant address display area also blinks, there are no units that correspond to the selected unit number. In this case, the refrigerant address and unit number may be incorrect, so repeat steps 2 and 3 to set the correct ones.

* When grouping different refrigerant systems, if an indoor unit other than the

one to which the refrigerant address has been set performs fan operation, there may be another refrigerant address that is the same as the specified one. In this case, check the DIP switch of the outdoor unit to see whether such a refrigerant address exists.

6 Select the mode number.

F Press the [ TEMP] buttons ( and ) to set the desired mode

number. (Only the selectable mode numbers can be selected.)

7 Select the setting content for the selected mode.

G Press the

button. The currently selected setting number will

blink, so check the currently set content.

F Press the [

TEMP] buttons ( and ) to select the desired setting

number.

8 Register the settings you have made in steps 3 to 7 .

E Press the

button. The mode number and setting number will start

to blink and registration starts.

The mode number and setting number will stop blinking and remain lit, indicating the end of registration.

* If " - - - " is displayed for both the mode number and setting number and "

" blinks in the room temperature display area, a transmission error may have occurred.

Check to see if there are any sources of noise or interference near the transmission path. 9 If you wish to continue to select other functions, repeat steps 3 to 8 . 0 Complete function selection.

A Hold down the ( mode is 15 to 28) and buttons

simultaneously for at least two seconds. After a while, the function selection screen will disappear and the air condi-

tioner OFF screen will reappear.

* Do not operate the remote controller for at least 30 seconds after completing

function selection. (No operations will be accepted even if they are made.)

Note If a function of an indoor unit is changed by function selection after installation is complete, make sure that a " " mark, etc., is given in the "Check" column of Table 1 to indicate the change.

Unit number display section

Mode number display section

00 refrigerant address

Indoor unit

Fan draft

Remote controller

Unit number 01 Unit number 02

Outdoor unit

Unit number 03

Designate operation

Example) When the refrigerant address is set to 00 and the unit number is 02.

Mode number display section

Mode number 02 = Indoor tempreture detection

Setting number display section

Setting number 3 = Remote controller built-in sensor

Setting number 1 = Indoor unit operating average

TEST

FUNCTION SELECTION

TEST

FILTER

Refrigerant address display section

FUNCTION SELECTION

ON/OFF

MODE

FILTER

Page 75

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

CHECK

RESET

SET

CLOCK

CHECK

min

The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation . The procedure is given after the flow chart.

1 Check the function selection setting. 2 Switch to function selection mode.

(Enter address "50" in troubleshooting mode, then press the HOUR button.)

Troubleshooting mode is the mode entered when you press the INSPECT button twice to display "INSPECT".

3 Specify unit No. "01" (since the function applies to unit 01).

(Set address "01" while still in troubleshooting mode, then press the MINUTE button.)

Note: You can't specify the refrigerant address. 4

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation). (Set address "24" while still in troubleshooting mode, then press the HOUR button.)

Finished

8 End function selection mode.

(End troubleshooting mode.)

YES

Note: When you switch to function selection mode

on the wireless remote controller's operation area, the unit ends function selection mode automatically if nothing is input for 10 minutes or longer.

5 Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Change unit No.

YES

12-1-2. Selecting functions using the wireless remote controller (Type C)

min

Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller.

[Flow of function selection procedure]

[Operating instructions]

1 Check the function settings. 2 Press the button twice continuously. → CHECK is lit and “00” blinks.

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

3 Set the unit number.

Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.) Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

By setting unit number with the button, specified indoor unit starts performing fan operation. Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same refrigerant system start performing fan operation simultaneously.

* If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number

setting.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the unit number

setting.

4 Select a mode.

Press the temp button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree

during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the button.

→ The sensor-operation indicator will flash and beeps will be heard to indicate the current setting number. Current setting number: 1 = 1 beep (one second)

2 = 2 beeps (one second each)

* If a mode number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the mode

number.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode

number.

5 Select the setting number.

Press the temp button to select the setting number. (02: Not available) Direct the wireless remote controller toward the receiver of the indoor unit and press the button. → The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.

Setting number: 1 = 2 beeps (0.4 seconds each)

* If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting. * If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.

6 Repeat steps 4 and 5 to make an additional setting without changing unit number. 7 Repeat steps 3 to 5 to change unit number and make function settings on it. 8 Complete the function settings

Press button.

* Do not use the wireless remote controller for 30 seconds after completing the function setting.

3 = 3 beeps (one second each)

2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated three times)

Page 76

12-2. FUNCTION SELECTION OF REMOTE CONTROLLER

The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed.

Item 1

1.Change Language ("CHANGE LANGUAGE")

2.Function limit ("FUNCTION SELECTION")

3.Mode selection ("MODE SELECTION")

4.Display change ("DISP MODE SETTING")

Item 3 (Setting content)

• Display in multiple languages is possible.

• Setting the range of operation limit (operation lock)

• Setting the use or non-use of "automatic" operation mode

• Setting the temperature adjustable range (maximum, minimum)

• Selecting main or sub remote controller *

When two remote controllers are connected to one group, one controller must be set to sub.

• Setting the use or non-use of clock function

• Setting the timer type

• Contact number display in case of error

• Setting the telephone number

• Setting the temperature unit (: or °F) to display

• Setting the use or non-use of the display of indoor (suction) air temperature

• Setting the use or non-use of the display of "Cooling" or "Heating" display during

operation with automatic mode

Item 2

Language setting to display

(1)

Operation function limit setting (operation lock) ("LOCKING FUNCTION")

(2)

Use of automatic mode setting ("SELECT AUTO MODE")

(3)

Temperature range limit setting ("LIMIT TEMP FUNCTION")

(1)

Remote controller main/sub setting ("CONTROLLER MAIN/SUB")

(2) Use of clock setting ("CLOCK") (3) Timer function setting ("WEEKLY TIMER") (4) Contact number setting for error situation ("CALL.")

(1) Temperature display :/°F setting ("TEMP MODE :/°F") (2)

Room air temperature display setting ("ROOM TEMP DISP SELECT")

(3)

Automatic cooling/heating display setting ("AUTO MODE DISP C/H")

[Function selection flowchart] Refer to next page. [1] Stop the air conditioner to start remote controller function selection mode. [2] Select from item1. [3] Select from item2. [4] Make the setting. (Details are specified in item3) [5] Setting completed. [6] Change the display to the normal one. (End)

➔➔➔

➔➔

[Detailed setting] [4] -1. CHANGE LANGUAGE setting

The language that appears on the dot display can be selected.

• Press the [

MENU] button to change the language.

1 Japanese (JP), 2English (GB), 3 German (D), 4 Spanish (E), 5 Russian (RU), 6 Italian (I), 7 Chinese (CH),8 French (F)

[4] -2. Function limit (1) Operation function limit setting (operation lock)

• To switch the setting, press the [ ON/OFF] button. 1 no1: Operation lock setting is made on all buttons other than

the [

ON/OFF] button.

2 no2: Operation lock setting is made on all buttons. 3 OFF (Initial setting value) : Operation lock setting is not made

* To make the operation lock setting valid on the normal screen, it is

necessary to press buttons (Press and hold down the [FILTER] and [ ON/OFF] buttons at the same time for two seconds.) on the normal screen after the above setting is made..

(2) Use of automatic mode setting When the remote controller is connected to the unit that has automatic operation mode, the following settings can be made.

• To switch the setting, press the [ ON/OFF] button. 1 ON (Initial setting value) : The automatic mode is displayed when

the operation mode is selected.

2 OFF : The automatic mode is not displayed

when the operation mode is selected.

[4] -3. Mode selection setting (1) Remote controller main/sub setting

• To switch the setting, press the [ ON/OFF] button.

1 Main : The controller will be the main controller. 2 Sub : The controller will be the sub controller.

(2) Use of clock setting

• To switch the setting, press the [ ON/OFF] button.

1 ON :The clock function can be used. 2 OFF:The clock function cannot be used.

(3) Timer function setting

• To switch the setting, press the [ ON/OFF] button (Choose one of the followings.).

1 WEEKLY TIMER (initial setting):

The weekly timer can be used.

2 AUTO OFF TIMER: The auto off timer can be used.

SIMPLE TIMER:

The simple timer can be used.

TIMER MODE OFF: The timer mode cannot be used.

* When the use of clock setting is OFF , the "WEEKLY TIMER" cannot be

used.

(4) Contact number setting for error situation

• To switch the setting, press the [ ON/OFF] button.

1 CALL OFF:

The set contact numbers are not displayed in case of error.

2 CALL **** *** **** : The set contact numbers are displayed in case

of error.

(3) Temperature range limit setting After this setting is made, the temperature can be changed within the set range.

• To switch the setting, press the [ ON/OFF] button. 1 LIMIT TEMP COOL MODE :

The temperature range can be changed on cooling/dry mode.

2 LIMIT TEMP HEAT MODE :

The temperature range can be changed on heating mode.

3 LIMIT TEMP AUTO MODE :

The temperature range can be changed on automatic mode. 4 OFF (initial setting) : The temperature range limit is not active. *

When the setting, other than OFF, is made, the temperature range limit setting on cooling, heating and automatic mode is made at the same time. However the range cannot be limited when the set temperature range has not changed.

•

To increase or decrease the temperature, press the [ TEMP ( ) or ( )] button.

•

To switch the upper limit setting and the lower limit setting, press the

[ ]

button. The selected setting will flash and the temperature can be set.

• Settable range

Cooling/Dry mode : Lower limit: 19 : ~ 30: Upper limit: 30 : ~ 19: Heating mode : Lower limit: 17 : ~ 28: Upper limit: 28 : ~ 17: Automatic mode : Lower limit: 19 : ~ 28: Upper limit: 28 : ~ 19:

CALL_ : The contact number can be set when the display is as

shown on the left.

• Setting the contact numbers To set the contact numbers, follow the following procedures. Move the flashing cursor to set numbers. Press the [

TEMP. ( ) and

(

)] button to move the cursor to the right (left). Press the [ CLOCK

(

) and ( )] button to set the numbers.

[4] -4. Display change setting (1) Temperature display :/ F setting

• To switch the setting, press the [ ON/OFF] button.

1 : : The temperature unit : is used. 2 F: The temperature unit

°°

F is used.

• To switch the setting, press the [ ON/OFF] button.

(3) Automatic cooling/heating display setting

• To switch the setting, press the [ ON/OFF] button. 1 ON : One of "Automatic cooling" and "A utomatic heating" is displayed

under the automatic mode is running.

2 OFF:Only "Automatic" is displayed under the automatic mode.

(2) Room air temperature display setting

1 ON : The room air temperature is displayed. 2 OFF : The room air temperature is not displayed.

Page 77

Hold down the E button and press the D button for 2 seconds.

Remote controller function selection mode

E Press the operation mode button. G Press the TIMER MENU button. D Press the TIMER ON/OFF button.

Item1 Item2

Dot display

Item3

Room air temperature is not displayed.

One of "Automatic cooling" and "Automatic heating" is displayed under the automatic mode is running. (Initial setting value)

Only "Automatic" is displayed under the automatic mode.

Normal display (Display when the air condition is not running)

Change Language

Function selection

Mode selection

Display mode setting

Operation lock setting is not used. (Initial setting value)

Operation lock setting is except On/Off buttons.

Operation lock setting is All buttons.

The automatic mode is displayed when the operation mode is selected. (Initial setting value)

The automatic mode is not displayed when the operation mode is selected.

The temperature range limit is not active. (Initial setting value)

The temperature range can be changed on cooling/dry mode.

The temperature range can be changed on heating mode.

The temperature range can be changed on automatic mode.

The remote controller will be the main controller. (Initial setting value)

The remote controller will be the sub controller.

The clock function can be used. (Initial setting value)

The clock function can not be used.

Weekly timer can be used. (Initial setting value)

Auto off timer can be used.

Simple timer can be used.

Timer mode can not be used.

The set contact numbers are not displayed in case of error. (Initial setting value)

The set contact numbers are displayed in case of error.

The temperature unit : is used. (Initial setting value)

The temperature unit °F is used.

Room air temperature is displayed. (Initial setting value)

Flowchart of Function Setting

Setting language (English)

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

PAR-21MAA

OPERATION

ON/OFF

CHECK

CLEAR

FILTER

TEST

OFF

no1

no2

OFF

CALL-

°F

OFF

Page 78

13 EASY MAINTENANCE FUNCTION

● Reduces maintenance work drastically.

● Enables you to check operation data of the indoor and outdoor units by remote controller.

Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models.

Smooth Maintenance Function

Easy maintenance information (unit)

Compressor Outdoor unit Indoor unit

Accumulated operating

time

(o10 hours) temperature ( :) temperature (:)

Number of ON/OFF Discharge

times (o10 times) temperature (:) temperature (:) Operating Outside air Filter operating current (A) temperature (:) time* (Hours)

* The filter operating time is the time that has elapsed since the filter was reset.

Heat exchanger

Discharge temperature 64:

Remove the service panel.

Measure the discharge

Intake air

Heat exchanger

963

temperature.

● Conventional inspection work

●Outdoor unit ●

●Indoor unit ●

Measure the intake air temperature.

Measure the outside air temperature

13-1.MAINTENANCE MODE OPERATION METHOD

If you are going to use 13-2. "GUIDE FOR OPERATION CONDITION", set the airflow to "High" before activating maintenance mode.

● Switching to maintenance mode

Maintenance mode can be activated either when the air conditioner is operated or stopped. It cannot be activated during test run.

w Maintenance information can be viewed even if the air conditioner is stopped.

■ Remote controller button information

A C B

Compressor information

Operation mode

(1)Press the

[Display

TEST

]

MAINTENANCE

button for 3 seconds to switch to maintenance mode.

If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).

Outdoor unit information

Indoor unit information

Confirm

Activate/cancel maintenance mode

● Fixed Hz operation

The operating frequency can be fixed to stabilize operation of inverter model. If the air conditioner is currently stopped, start it by this operation.

(2)Press the

[Display

(3)Press the

[Display

MODE

]

FILTER

] Waiting for stabilization

button to select the desired operation mode.

Stable cooling operation

COOL STABLE MODE

Stable heating operation

HEAT STABLE MODE

Stable operation cancellation

STABLE MODE CANCEL

( ) button to confirm the setting.

Stabilized

After 10 to 20 minutes

Page 79

● Data measurement

When the operation is stabilized, measure operation data as explained below.

(4)Press the [TEMP] buttons ( and ) to select the desired refrigerant address.

[Screen

(5)Select the type of data to be displayed.

After selecting, go to step (6). Compressor information

[Display A]

button

Cumulative

12 3

operation time

COMP ON x10 HOURS

Outdoor unit information

ON/OFF

[Display A

button

Heat exchanger

45 6

]

temperature

OUTDOOR UNIT H·EXC. TEMP

Indoor unit information

button

Indoor room

78 9

[Display

]

temperature

INDOOR UNIT INLET TEMP

ON/OFF Number Operating current

COMP ON x100 TIMES

Comp discharge temperature

OUTDOOR UNIT OUTLET TEMP

Heat exchanger temperature

INDOOR UNIT

H·EXC. TEMP

COMP ON CURRENT (A)

Outdoor ambient temperature

OUTDOOR UNIT OUTDOOR TEMP

Filter operating time

INDOOR UNIT FILTER USE H

(6)Press the

FILTER

( ) button to confirm the setting.

[Display example for accumulated operating time]

Display

Waiting for response

Flashing

After approx. 10 seconds

(7)Data is displayed on the display (at C).

To check the data for each item, repeat steps (5) to (7).

(8)To cancel maintenance mode, press the

TEST

■ Refrigerant address Single refrigerant system

In the case of single refrigerant system, the refrigerant address is "00" and no operation is required. Simultaneous twin, triple units belong to this category (single refrigerant system).

[1:1]

Refrigerant address=00

Outdoor

unit

Indoor unit

Remote

controller

[Twin]

Refrigerant address=00

Outdoor

unit

Indoor unit

Remote

controller

Indoor unit

12,340 hours

button for 3 seconds or press the

Multi refrigerant system (group control)

Up to 16 refrigerant systems (16 outdoor units) can be connected as a group by one remote controller. To check or set the refrigerant addresses.

Refrigerant address 00

Outdoor

unit

Indoor unit

Remote

controller

Refrigerant address 01

Outdoor

unit

Indoor unit

Refrigerant address 02

Outdoor

unit

Indoor unit

ON/OFF

button.

Refrigerant address 15

Outdoor

unit

Indoor unit

Page 80

13-2.GUIDE FOR OPERATION CONDITION

Inspection item Result

Breaker Good Retightened

Terminal block Outdoor Unit Good Retightened

Loose con-

nection

(Insulation resistance) M"

Power supply

Compressor

(Voltage) V

1 Accumulated operating time Time 2 Number of ON/OFF times Times 3 Current A

Refrigerant/heat exchanger temperature

Refrigerant/discharge temperature

6 Air/outside air temperature COOL : HEAT :

(Air/discharge temperature) COOL : HEAT :

Temperature

Appearance Good

Outdoor Unit

Heat exchanger Good Sound/vibration None Present

Cleanli-

ness

Air/intake air temperature COOL : HEAT :

(Air/discharge temperature) COOL : HEAT :

Refrigerant/heat exchanger temperature Filter operating time* Time

Temperature

Decorative panel Good Filter Good

Indoor Unit

Fan Good Heat exchanger Good

Cleanliness

Sound/vibration None Present

* The filter operating time is the time that has elapsed since the filter was reset.

Indoor Unit Good Retightened

COOL : HEAT : COOL : HEAT :

Cleaning required Cleaning required

COOL : HEAT :

Cleaning required Cleaning required Cleaning required Cleaning required

Check Points

Enter the temperature differences between 5, 4, 7 and 8 into the graph given below. Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to "Hi" before activating maintenance mode.

Classification Item Result

Inspection

Temperature

Cool

difference

Inspection

Temperature

Heat

difference

* Fixed Hz operation may not be possible under the following tempera-

ture ranges. A)In cool mode, outdoor intake air temperature is 40 : or higher or

indoor intake air temperature is 23 : or lower.

B)In heat mode, outdoor intake air temperature is 20 : or higher or

indoor intake air temperature is 25 : or lower.

* If the air conditioner is operated at a temperature range other than the

ones above but operation is not stabilized after 30 minutes or more have elapsed, carry out inspection.

* In heat mode, the operation state may vary due to frost forming on the

outdoor heat exchanger.

Is "D000" displayed stably on the remote controller?

5 Discharge temperature) – (4 Outdoor

( heat exchanger temperature) (

7 Indoor intake air temperature) – (8

Indoor heat exchanger temperature) Is "D000" displayed stably on the remote controller?

5 Discharge temperature) – (8 Indoor

( heat exchanger temperature) (

8 Indoor heat exchanger temperature) –

(

7 Indoor intake air temperature)

Stable Unstable

Area Check item

Normal Filter inspection Inspection A

Inspection B Inspection C

Normal operation state Filter may be clogged. *1 Performance has dropped. Detailed inspection is necessary. Refrigerant amount is dropping. Filter or indoor heat exchanger may be clogged.

Judgment

Cool Heat

* The above judgement is just guide based on Japanese standard

conditions. It may be changed depending on the indoor and outdoor temperature.

Cool mode Heat mode

Indoor

Inspection C

35 30 25

Filter inspection

Normal

15 10

Inspection A

Indoor intake air temperature)— (

010 20304050607080

heat exchanger temperature)

(

Result

[5 Discharge temperature] – [4 Outdoor heat exchanger temperature)

Inspection B

45 40 35 30 25 20 15 10

Indoor heat exchanger temperature) —

Indoor intake air temperature)

(

[5 Discharge temperature] – [8 Indoor heat exchanger temperature)

Inspection C

Filter inspection

Normal

Inspection B

Inspection A

010 20304050607080

Page 81

MONITORING THE OPERA TION DA T ABY THE REMOTE CONTROLLER

14-1. HOW TO "MONITOR THE OPERATION DATA"

• Turn on the [Monitoring the operation data]

(3)

Example) Request code "004"

Discharge temperature 69 Refrigerant address "00"

(7) (5)

;

(1) (2)

(4)

(1)Press the (2)Press the

Note)

Operating the service inspection monitor

- - - ] appears on the screen (at D) when [Maintenance monitor] is activated.

[

(The display (at D ) now allows you to set a request code No.) (3)Press the [TEMP] buttons (

[Screen B ]

(4)Press the [CLOCK] buttons ( and ) to set the desired request code No. (5)Press the

(The requested data will be displayed at C in the same way as in maintenance mode.) Data collected during operation of the remote controller will be displayed.

The collected data such as temperature data will not be updated automatically even if the data changes. To display the updated data, carry out step (4) again.

TEST

CHECK

It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while "

since no buttons are operative.

FILTER

button for 3 seconds so that [ Maintenance mode] appears on the screen (at A ).

button for 3 seconds to switch to [Maintenance monitor].

and ) to select the desired refrigerant address.

button to perform data request.

(6)

B: Refrigerant address C: Data display area D: Request code display area

- - - -"

is blinking),

Canceling the Monitoring the operation data

(6)While [Maintenance monitor] is displayed, press the (7)To return to normal mode, press the

ON/OFF

CHECK

button.

button for 3 seconds to return to maintenance mode.

Page 82

14-2. REQUEST CODE LIST

* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.

Request code

Request content

Description

(Display range)

Unit Remarks

0 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18

20 21

22 23 24 25 26 27 28 29 30 31

35 36

37 38 39 40 41 42 43 44 45 46 47 48 49

Operation state Compressor-Operating current (rms) Compressor-Accumulated operating time Compressor-Number of operation times Discharge temperature (TH4) Outdoor unit - Liquid pipe 1 temperature (TH3) Outdoor unit - Liquid pipe 2 temperature Outdoor unit-2-phase pipe temperature (TH6)

Outdoor unit-Outside air temperature (TH7) Outdoor unit-Heat sink temperature (TH8)

Discharge super heat (SHd) Sub-cool (SC)

Compressor-Operating frequency Compressor-Target operating frequency Outdoor unit-Fan output step Outdoor unit-Fan 1 speed (Only for air conditioners with DC fan motor) Outdoor unit-Fan 2 speed (Only for air conditioners with DC fan motor)

LEV (A) opening LEV (B) opening

Primary current DC bus voltage

Number of connected indoor units Indoor unit-Setting temperature Indoor unit-Intake air temperature <Measured by thermostat> Indoor unit-Intake air temperature (Unit No. 1) <Heat mode-4-deg correction> Indoor unit-Intake air temperature (Unit No. 2) <Heat mode-4-deg correction> Indoor unit-Intake air temperature (Unit No. 3) <Heat mode-4-deg correction> Indoor unit-Intake air temperature (Unit No. 4) <Heat mode-4-deg correction>

Indoor unit - Liquid pipe temperature (Unit No. 1) Indoor unit - Liquid pipe temperature (Unit No. 2) Indoor unit - Liquid pipe temperature (Unit No. 3) Indoor unit - Liquid pipe temperature (Unit No. 4)

Indoor unit-Cond./Eva. pipe temperature (Unit No. 1) Indoor unit-Cond./Eva. pipe temperature (Unit No. 2) Indoor unit-Cond./Eva. pipe temperature (Unit No. 3) Indoor unit-Cond./Eva. pipe temperature (Unit No. 4)

Thermostat ON operating time Test run elapsed time

Refer to 14-2-1. Detail Contents in Request Code. 0 – 50 0 – 9999 0 – 9999 3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255 0 – 130

0 – 255 0 – 255 0 – 10

0 – 9999

0 – 500 0 – 500

0 – 50 180 – 370

0 – 4 17 – 30 8 – 39 8 – 39

8 – 39

-39 – 88

0 – 999 0 – 120

– A

10 hours

100 times

: : : :

: :

Hz Hz

Step

rpm

Pulses Pulses

A V

Units

: :

: : : :

Minutes Minutes

"0" is displayed if the air conditioner is a single-fan

type.

"0" is displayed if the target unit is not present.

"0"

is displayed if the target unit is not present.

"0"

is displayed if the target unit is not present.

Not possible to activate maintenance mode during the test run.

Page 83

Request code

Request content

Description

(Display range)

Unit Remarks

50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

84 85

86 87 88

89 90

92 93 94 95 96 97 98 99

100

101

102

Indoor unit-Control state Outdoor unit-Control state Compressor-Frequency control state Outdoor unit-Fan control state Actuator output state Error content (U9)

Signal transmission demand capacity Contact demand capacity External input state (silent mode, etc.)

Outdoor unit-Capacity setting display Outdoor unit-Setting information

Outdoor unit-SW1 setting information Outdoor unit-SW2 setting information

Outdoor unit-SW4 setting information Outdoor unit-SW5 setting information Outdoor unit-SW6 setting information Outdoor unit-SW7 setting information Outdoor unit-SW8 setting information Outdoor unit-SW9 setting information Outdoor unit-SW10 setting information

M-NET adapter connection (presence/absence)

Display of execution of replace/wash operation Outdoor unit-Microcomputer version information

Outdoor unit-Microcomputer version information (sub No.)

Outdoor unit - Error postponement history 1 (latest)

Outdoor unit - Error postponement history 2 (previous)

Outdoor unit - Error postponement history 3 (last but one)

0 – 255

Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code.

"0000": Not connected

Examples) Ver 5.01 ➝ Auxiliary information (displayed after version information) Examples) Ver 5.01 A000 ➝

Displays postponement code. (" - - " is displayed if no postponement code is present) Displays postponement code. (" - - " is displayed if no postponement code is present) Displays postponement code. (" - - " is displayed if no postponement code is present)

– – – – – –

% – –

– –

– – – – – – –

–

Ver

–

Code

Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code.

Refer to 14-2-1.Detail Contents in Request Code.

Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code.

Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code. Refer to 14-2-1.Detail Contents in Request Code.

"0001": Connected

"0000": Not washed "0001": Washed

"0501"

"A000"

Page 84

Request code

Request content

Description

(Display range)

Unit Remarks

103 104 105

106

107 108 109 110 111 112 113 114 115 116 117 118 119 120

121

122

123 124

125 126 127 128 129 130 131

132

133

134 135

136 137 138 139 140

~ 146 147 148 149 150 151 152

Displays error history. (" - - " is displayed if no history is present.) Displays error history. (" - - " is displayed if no history is present.) Displays error history. (" - - " is displayed if no history is present.)

: TH3 6 : TH6 7 : TH7 8 : TH8 0 : No thermistor error

Displayed in the same way as request code "0". 0 – 50 0 – 9999 0 – 9999 3 – 217

-40 – 90

-39 – 88

-40 – 200 0 – 255 0 – 130 0 – 255

0 – 10

0 – 9999

0 – 500 0 – 500

0 – 999

-39 – 88

Code Code Code

Sensor

number

– A

10 hours

100 times

: : : :

Step

rpm

Pulses Pulses

Minutes

: : :

"0" is displayed if the air conditioner is a single-

fan type.

Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad). Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).

Error history 1 (latest) Error history 2 (second to last) Error history 3 (third to last)

Abnormal thermistor display (TH3/TH6/TH7/TH8)

Operation mode at time of error Compressor-Operating current at time of error Compressor-Accumulated operating time at time of error Compressor-Number of operation times at time of error Discharge temperature at time of error

Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error

Outdoor unit - Liquid pipe 2 temperature at time of error Outdoor unit-2-phase pipe temperature (TH6) at time of error

Outdoor unit-Outside air temperature (TH7) at time of error Outdoor unit-Heat sink temperature (TH8) at time of error Discharge super heat (SHd) at time of error Sub-cool (SC) at time of error Compressor-Operating frequency at time of error Outdoor unit at time of error

• Fan output step Outdoor unit at time of error

• Fan 1 speed (Only for air conditioners with DC fan) Outdoor unit at time of error

• Fan 2 speed (Only for air conditioners with DC fan)

LEV (A) opening at time of error LEV (B) opening at time of error

Thermostat ON time until operation stops due to error

Indoor - Liquid pipe temperature at time of error

Indoor-2-phase pipe temperature at time of error

Indoor at time of error

• Intake air temperature <Thermostat judge temperature>

Indoor-Actual intake air temperature Indoor - Liquid pipe temperature Indoor-2-phase pipe temperature

Page 85

Request code

Request content

Description

(Display range)

Unit Remarks

153 154

155 156

157 158 159

160 161 162 163 164 165 166 167

~ 189 190 191

192

~ 764 765 766

767

0 – 9999

0 –

255

Fan control data

00 **" "**" indicates fan control data.

"00 **" "**" indicates fan control data.

Refer to 14-2-1 Detail Contents in Request Code.

Undefined

Refer to 14-2-1 Detail Contents in Request Code.

Undefined

Examples) Ver 5.01 ➝ "0501" Auxiliary information (displayed after version information) Examples) Ver 5.01 A000 ➝ "A000"

1 hour

10 hours

– – –

– – – – –

Ver

–

For indoor fan phase control For indoor fan pulsation control For indoor DC brushless motor control

Indoor-Fan operating time (After filter is reset) Indoor-Total operating time (Fan motor ON time)

Indoor fan output value (Sj value) Indoor fan output value (Pulsation ON/OFF) Indoor fan output value (duty value)

Indoor unit-Model setting information Indoor unit-Capacity setting information Indoor unit-SW3 information Wireless pair No. (indoor control board side) setting Indoor unit-SW5 information

Indoor unit-Microcomputer version information Indoor unit-Microcomputer version information (sub No.)

Stable operation (Heat mode) Stable operation (Cool mode)

Stable operation cancellation

This request code is not provided to collect data. It is used to fix the operation state. This request code is not provided to collect data. It is used to fix the operation state. This request code is not provided to collect data. It is used to cancel the operation state that has been fixed by request codes "765" and "766".

Refer to 14-2-1 Detail Contents in Request Code.

Page 86

Frequency control state 2

Display

Discharge temperature

Condensation temperature

Anti-freeze

Heat sink temperature

overheat prevention

protection control

overheat prevention 0 1 Controlled 2 Controlled 3 Controlled Controlled 4 Controlled 5 Controlled Controlled 6 Controlled Controlled 7 Controlled Controlled Controlled 8 Controlled 9 Controlled Controlled A Controlled Controlled b Controlled Controlled Controlled C Controlled Controlled d Controlled Controlled Controlled E Controlled Controlled Controlled F Controlled Controlled Controlled Controlled

14-2-1. Detail Contents in Request Code

[Operation state] (Request code ":0")

Data display

Example) Request code "004"

Discharge temperature 69 : Refrigerant address "00"

B: Refrigerant address C: Data display area D: Request code display area

Relay output state Operation mode

[Indoor unit – Control state] (Request code :"50 ")

Data display

Operation mode

Display Operation mode

0 STOP • FAN C COOL • DRY H HEAT d Defrost

Relay output state

Display

Power currently

Compressor Four-way valve Solenoid valve

supplied to compressor

Unit No. 4 state Unit No. 3 state

Unit No. 2 state Unit No. 1 state

Display State

0 Normal 1 Preparing for heat operation 2– 3– 4 Heater is ON. 5 Anti-freeze protection is ON. 6 Overheat protection is ON. 7 Requesting compressor to turn OFF F There are no corresponding units.

[Outdoor unit – Control state] (Request code ":51")

Data display State 0 0 0 0 Normal 0 0 0 1 Preparing for heat operation. 0 0 0 2 Defrost

[Compressor – Frequency control state] (Request code ":52")

Data display

Frequency control state

Frequency control state 1

Display Current limit control

0 No current limit 1 Primary current limit control is ON. 2 Secondary current limit control is ON.

–

ON ON

0 1

2 3

4 5 6 7

8 A

–

ON ON ON ON

–

ON ON

–

Page 87

[Fan control state] (Request code :"53")

Data display

Fan step correction value by heat sink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control

Display Correction value

- (minus) – 1 00

[Actuator output state] (Request code :"54")

Data display

Actuator output state 1 Actuator output state 2

Actuator output state 1

Display SV1 Four-way valve Compressor

0 1

2 3

4 5

6 7

8 9

A b

d E

ON ON

Actuator output state 2

Display 52C SV2 SS

0 1

2 3 4 5 6 7

ON ON

ON ON ON ON

[Error content (U9)] (Request code :"55")

Data display

Error content 1 Error content 2

Error content 1 : Detected

Display

Overvoltage Undervoltage L1-phase

Power synchronizing

error error open error

signal error 0 1 2 3 4 5 6 7 8 9 A b

d E F

Error content 2 : Detected

Display

Converter Fo

PAM error

error 0 1 2 3

Compressor is

warming up

Page 88

[Contact demand capacity] (Request code "61")

Data display

000

Setting content

[External input state] (Request code "62")

Data display

Input state

Input state : Input present

Display

Contact demand Silent mode Spare 1 Spare 2

input input input input 0 1 2 3 4 5 6 7 8 9 A b C d E F

[Outdoor unit -– Capacity setting display] (Request code : "70")

Data display

Capacity

10 50

935

11 60 14 71 20 100 25 125 28 140 40 200 50 250

[Outdoor unit – Setting information] (Request code "71")

Data display

Setting information 1 Setting information 2

Setting information 1

Display Defrost mode

0 Standard 1 For high humidity

Setting information 2

Display

Single-/ Heat pump/

three-phase

cooling only

Single-phase

Heat pump

Cooling only

Three-phase

Heat pump

Cooling only

Setting content

Display Setting value

Setting

SW7-1 SW7-2 0 1 50%

2 75% ON

3 100%

000

Page 89

SW1, SW2, SW6, SW7

123456 000000 0000

100000 0001 010000 0002 110000 0003 001000 0004 101000 0005 011000 0006 111000 0007 000100 0008 100100 0009 010100 000A 110100 000b 001100 000C 101100 000d 011100 000E 111100 000F 000010 0010 100010 010010 110010 001010 101010 011010 111010 000110 100110 010110 110110 001110 101110 011110 111110 000001 100001 010001 110001 001001 101001 011001 111001 000101 100101 010101 110101 001101 101101 011101 111101 000011 100011 010011 110011 001011 101011 011011 111011 000111 100111 010111 110111 001111 101111 011111 111111

[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82

0: Swich OFF 1: Swich ON

Data display

SW5

1234 0000 0000

1000 0001 0100 0002 1100 0003 0010 0004 1010 0005 0110 0006 1110 0007 0001 0008 1001 0009 0101 000A 1101 000b 0011 000C 1011 000d 0111 000E 1111 000F

0: Swich OFF 1: Swich ON

Data display

SW8

123 000 0000

100 0001 010 0002 110 0003 001 0004 101 0005 011 0006 111 0007

0: Swich OFF 1: Swich ON

Data display

SW4, SW9, SW10

12 0 0 00 00

1 0 00 01 0 1 00 02 1 1 00 03

0: Swich OFF 1: Swich ON

Data display

00 11 00 12 00 13 00 14 00 15 00 16 00 17 00 18 00 19 00 1A 00 1B 00 1C 00 1D 00 1E 00 1F 00 20 00 21 00 22 00 23 00 24 00 25 00 26 00 27 00 28 00 29 00 2A 00 2B 00 2C 00 2D 00 2E 00 2F 00 30 00 31 00 32 00 33 00 34 00 35 00 36 00 37 00 38 00 39 00 3A 00 3B 00 3C 00 3D 00 3E 00 3F

Page 90

[Indoor unit – Model setting information] (Request code :162)

Data display

See the table on the right.

Display Model setting state Display Model setting state

00 PSA-RP•GA, PSH-PGAH 20 01 21 PKA-RP•FAL, PKH-P•FALH 02

PEAD-RP•EA(2)/GA, PEHD-P•EAH

22 PCA-RP•GA, PCH-P•GAH 03 SEZ-KA•VA 23 04 24 05 SLZ-KA•VA(L) 25 06 PCA-RP•HA 26 07 27 08 28 09 29

0A 2A

0b 2b PKA-RP•GAL, PKH-P•GALH

0C 2C

0d 2d

0E 2E

0F 2F PLA-RP• AA 10 30 11 PEA-RP•EA 31 PLH-P•AAH

PLA-RP•AA2

12 MEXZ-GA•VA(L) 32 13 33 14 34 15 35 16 36 17 37 18 38 19 39

1A 3A

1b 3b

1C 3C

1d 3d

1E 3E

1F 3F

[Indoor unit – Capacity setting information] (Request code 163 )

Data display

See the table on the right.

Display Capacity setting state Display Capacity setting state

00 12 10 112 01 16 11 125 02 22 12 140 03 25 13 160 04 28 14 200 05 32 15 224 06 36 16 250 07 40 17 280 08 45 18 09 50 19

0A 56 1A

0b 63 1b

0C 71 1C

0d 80 1d

0E 90 1E

0F 100 1F

Display Pair No. setting state

00 No. 0 01 No. 1 J41 disconnected 02 No. 2 J42 disconnected 03 No. 3 J41, J42 disconnected

[Wireless pair No. (indoor control board side) setting] (Request code 165 )

Data display

See the table on the right.

Page 91

15 DISASSEMBLY PROCEDURE

PUHZ-P100VHA.UK PUHZ-P100VHA1.UK

OPERATING PROCEDURE

1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 ✕ 10) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top

panel and remove it.

2. Removing the fan motor (MF1)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 5 fan grille fixing screws (5 ✕ 10) to detach the

fan grille. (See figure 1.)

(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See photo 1.)

(5) Disconnect the connector CNF1 on controller circuit

board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 ✕ 25) to detach the

fan motor. (See photo 2.)

Figure 1

Fan grille

Photo 1

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Service panel

Service panel fixing screws

Grill fixing screws

Front panel

Propeller

Photo 2

Fan motor fixing screws

Top panel

Fan motor (MF1)

3. Removing the electrical parts box

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit board;

fan motor, linear expansion valve, thermistor<Outdoor pipe>, thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>, thermistor<Outdoor>, thermistor<Heat sink>, high pressure switch, four-way valve and bypass valve. Then remove a screw (4 ✕ 8) from the valve bad to remove the lead wire. Pull out the disconnected wire from the electrical parts box.

• Fan motor (CNF1)

• Linear expansion valve (LEV-A)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• Thermistor <Heat sink> (CN3)

• High pressure switch (63H)

• Solenoid valve coil <Four-way valve> (21S4)

• Solenoid valve coil <Bypass valve> (SV2)

(5) Remove the terminal cover and disconnect the compressor

lead wire.

(6) Remove an electrical parts box fixing screw (4 ✕ 10) and

detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Front panel fixing screws

Photo 3

Valve bed

Cover panel fixing screws

Fan motor fixing screws

Electrical parts box

Controller circuit board (C.B.)

Electrical parts box fixing screw

Terminal block (TB1)

Terminal cover

Motor for compressor (MC)

Cover panel (Front)

Page 92

OPERATING PROCEDURE PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the

controller circuit board in the electrical parts box.

(4) Loosen the clamp for the lead wire of the electrical parts box. (5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)

from the sensor holder.

Note: In case of replacing thermistor <Outdoor 2-phase

pipe> (TH6), replace it together with thermistor <Outdoor> (TH7), since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

Photo 4

Thermistor <Outdoor 2-phase pipe> (TH6)

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box.

(4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Note: In case of replacing thermistor <Outdoor> (TH7),

replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since t he y are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4)

(1) Remove the service panel. (See figure 1.) (2) Disconnect the connectors, TH3 (white) and TH4 (white),

on the controller circuit board in the electrical parts box.

(3) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(4) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Discharge> (TH4) from the sensor holder.

Photo 5

Thermistor <Outdoor> (TH7)

Photo 6

Electrical parts box

Clamp

Sensor holder

Thermistor <Discharge> (TH4)

Thermistor <Outdoor pipe> (TH3)

Page 93

OPERATING PROCEDURE

PHOTOS

7. Removing the solenoid valve coil <Four-way valve> (21S4), linear expansion valve coil (LEV(A)) and solenoid valve coil <Bypass valve> (SV)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.)

[Removing the solenoid valve coil <Four-way valve>]

(4) Remove solenoid valve coil <Four-way valve> fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Four-way valve> by

sliding the coil toward you.

(6) Disconnect the connector 21S4 (green) on the controller

board in the electrical parts box.

[Removing the linear expansion valve coil]

(4) Remove the linear expansion valve coil by sliding the coil upward. (5) Disconnect the connectors, LEV A(white), on the controller

circuit board in the electrical parts box.

[Removing the solenoid valve coil <Bypass valve>]

(4) Remove the solenoid valve coil <Bypass valve> fixing screw

(M4 ✕ 6).

(5) Remove the solenoid valve coil <Bypass valve> by sliding the

coil upward.

(6) Disconnect the connector SV2 (blue) on the controller

circuit board in the electrical parts box.

8. Removing the four-way valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(5) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel.

(6) Remove the solenoid valve coil <Four-way valve>.

(See photo 7.) (7) Collect the refrigerant. (8) Remove the welded part of four-way valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

ing the right side panel.

Note 3: When installing the four-way valve, cover it with a wet

cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

9. Removing the linear expansion valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then

remove the valve bed. (5) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (6) Remove the linear expansion valve. (See photo 7.) (7) Collect the refrigerant. (8) Remove the welded part of linear expansion valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

ing the right side panel.

Note 3: When installing the linear expansion valve, cover

it with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 7

Solenoid valve coil <Bypass valve> fixing screw

Solenoid valve coil <Bypass valve> (SV)

Photo 8

Linear expansion valve

solenoid valve coil <Four-way valve> fixing screw

Linear expansion valve coil (LEV A)

Four-way valve

solenoid valve coil <Four-way valve> (21S4)

Four-way valve

Page 94

OPERATING PROCEDURE

PHOTOS

10. Removing the bypass valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel. (5) Remove the bypass valve solenoid coil. (See photo 7.). (6) Collect the refrigerant. (7) Remove the welded part of bypass valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by

removing the right side panel.

11. Removing the high pressure switch (63H)

rear of the unit and remove the right side panel. (5) Pull out the lead wire of high pressure switch. (6) Collect the refrigerant. (7) Remove the welded part of high pressure switch.

Photo 9

Solenoid valve coil <Bypass valve> fixing screw

Solenoid valve coil <Bypass valve> (SV)

Photo 10

Lead wire of high pressure switch

solenoid valve coil <Four-way valve> fixing screw

Linear expansion valve coil (LEV A)

Four-way valve

solenoid valve coil <Four-way valve> (21S4)

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by

removing the right side panel.

Note 3: When installing the high pressure switch, cover it

with a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

12. Removing the reactor (DCL)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) (4) Remove 4 reactor fixing screws (4 ✕ 10) and remove the

reactor.

w The reactor is attached to the rear of the electrical parts box.

High pressure switch (63H)

Photo 11

Reactor fixing screw

Reactor (DCL)

Reactor fixing screws

Electrical parts box

Page 95

OPERATING PROCEDURE

PHOTOS

13. Removing the motor for compressor (MC)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 ✕ 10) and remove

the separator. (9) Collect the refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a monkey wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Collect refrigerant without spreading it in the air.

Photo 12

Inlet

Outlet

Accumulator

Separator

14. Removing the Accumulator

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (8) Collect the refrigerant. (9) Remove welded pipes of Accumulator inlet and outlet. (10) Remove 2 Accumulator leg fixing screws (4 ✕ 10).

Note: Collect refrigerant without spreading it in the air.

Separator

fixing screw

Accumulator leg fixing screws

Motor for compressor (MC)

Page 96

PUHZ-P125VHA.UK PUHZ-P140VHA.UK PUHZ-P125VHA1.UK PUHZ-P140VHA1.UK

OPERATING PROCEDURE

1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 ✕ 10) and slide

the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 ✕ 10) of the top

panel and remove it.

2. Removing the fan motor (MF1, MF2)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 5 fan grille fixing screws (5 ✕ 10) to detach the

fan grille. (See figure 1.)

(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See photo 1.)

(5) Disconnect the connectors, CNF1, CNF2 on controller

circuit board in electrical parts box.

(6) Remove 4 fan motor fixing screws (5 ✕ 25) to detach the

fan motor. (See photo 2.)

Figure 1

Grille fixing screws

Photo 1

Nut

PHOTOS & ILLUSTRATION

Top panel fixing screws

Slide

Front panel

Propeller

Photo 2

Fan motor fixing screws

Top panel

Service panel

Fan grille

Service panel fixing screws

Fan motor

3. Removing the electrical parts box

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the indoor/outdoor connecting wire from

terminal block.

(4) Remove all the following connectors from controller circuit board;

fan motor, linear expansion valve, thermistor <Outdoor pipe>, thermistor <Discharge>, thermistor <Outdoor 2-phase pipe>, thermistor <Outdoor>, high pressure switch, solenoid valve coil <Four-way valve>. Then remove a screw (4 ✕ 8) from the valve bad to remove

the lead wire.

Pull out the disconnected wire from the electrical parts box. <Diagram symbol in the connector housing>

• Fan motor (CNF1, CNF2)

• Linear expansion valve (LEV-A)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• High pressure switch (63H)

• Solenoid valve coil <Four-way valve> (21S4)

(5) Remove the terminal cover and disconnect the

compressor lead wire.

(6) Remove an electrical parts box fixing screw (4 ✕ 10) and

detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

Fan motor fixing screws

Photo 3

Controller circuit board (C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Motor for compressor (MC)

Terminal cover

Screw

Cover panel (Front)

Cover panel fixing screws

Page 97

OPERATING PROCEDURE PHOTOS

4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connectors, TH6 and TH7 (red), on the

controller circuit board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box.

(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)

from the sensor holder.

Note: In case of replacing thermistor <Outdoor 2-phase

pipe> (TH6), replace it together with thermistor <Outdoor> (TH7) since they are combined together. Refer to No.5 below to remove thermistor <Outdoor>.

Photo 4

Thermistor <Outdoor 2-phase pipe> (TH6)

5. Removing the thermistor <Outdoor> (TH7)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Disconnect the connector TH7 (red) on the controller circuit

board in the electrical parts box. (4) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.) (5) Pull out the thermistor <Outdoor> (TH7) from the sensor

holder.

Note: In case of replacing thermistor <Outdoor> (TH7),

replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together. Refer to No.4 above to remove thermistor <Outdoor 2-phase pipe>.

6. Removing the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4)

(1) Remove the service panel. (See figure 1.) (2) Disconnect the connectors, TH3 (white) and TH4 (white),

on the controller circuit board in the electrical parts box.

(3) Loosen the clamp for the lead wire in the rear of the

electrical parts box. (See photo 4.)

(4) Pull out the thermistor <Outdoor pipe> (TH3) and

thermistor <Discharge> (TH4) from the sensor holder.

Photo 5

Thermistor <Outdoor>

(TH7)

Photo 6

Thermistor <Discharge>

(TH4)

Electrical parts box

Sensor holder

Thermistor <Outdoor pipe>

(TH3)

Clamp

Motor for compressor (MC)

Page 98

OPERATING PROCEDURE

PHOTOS

7. Removing the solenoid valve coil <Four-way valve> (21S4), and linear expansion valve coil (LEV(A))

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.)

[Removing the solenoid valve coil <Four-way valve>]

(3) Remove four-way valve solenoid coil fixing screw

(M4 ✕ 6).

(4) Remove the solenoid valve coil <Four-way valve> by

sliding the coil toward you.

(5) Disconnect the connector 21S4 (green) on the controller

circuit board in the electrical parts box.

[Removing the linear expansion valve coil]

(3) Remove the linear expansion valve coil by sliding the coil

upward.

(4) Disconnect the connectors, LEV A(white) on the controller

circuit board in the electrical parts box.

8. Removing the four-way valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (5) Remove the solenoid valve coil <Four-way valve>. (6) Collect the refrigerant. (7) Remove the welded part of four-way valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

ing the right side panel.

Note 3: When installing the four-way valve, cover it with a

wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Photo 7

Solenoid valve coil <Four-way valve> (21S4)

Solenoid valve coil <Four-way valve> fixing screw

Four-way valve

Linear expansion valve coil

9. Removing linear expansion valve

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball

valve and stop valve fixing screws (5 ✕ 16) and then

remove the valve bed. (4) Remove 4 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (5) Remove the linear expansion valve. (6) Collect the refrigerant. (7) Remove the welded part of linear expansion valve.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by remov-

ing the right side panel.

Note 3: When installing the linear expansion valve, cover

it with a wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes are not oxidized.

Linear expansion valve

Page 99

OPERATING PROCEDURE

PHOTOS

10. Removing the high pressure switch (63H)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 3 right side panel fixing screws (5 ✕ 10) in the

rear of the unit and remove the right side panel. (4) Pull out the lead wire of high pressure switch. (5) Collect the refrigerant. (6) Remove the welded part of high pressure switch.

Note 1: Collect refrigerant without spreading it in the air. Note 2: The welded part can be removed easily by

removing the right side panel.

Note 3: When installing the high pressure switch, cover it

with a wet cloth to prevent it from heating (100°C or more), then braze the pipes so that the inside of pipes are not oxidized.

11. Removing the reactor (DCL)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove the electrical parts box. (See photo 3.) <Removing the reactor> (4) Remove 4 reactor fixing screws (4 ✕ 10) and remove the

reactor.

Photo 8

Lead wire of high pressure switch

Photo 9

Reactor fixing screw

High pressure switch (63H)

w The reactor is attached to the rear of the electrical parts box.

Reactor fixing screws

Reactor (DCL)

Electrical parts box

Page 100

OPERATING PROCEDURE

PHOTOS

12. Removing the motor for compressor (MC)

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the rear

of the unit and then remove the right side panel. (8) Remove 3 separator fixing screws (4 ✕ 10) and remove

the separator. (9) Collect the refrigerant. (10) Remove the 3 points of the motor for compressor fixing

nut using a spanner or a monkey wrench.

(11) Remove the welded pipe of motor for compressor inlet

and outlet and then remove the compressor.

Note: Collect refrigerant without spreading it in the air.

13. Removing the Accumulator

(1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (See figure 1.) (3) Remove 2 front cover panel fixing screws (5 ✕ 10) and

remove the front cover panel. (See photo 3.)

(4) Remove 2 back cover panel fixing screws (5 ✕ 10) and

remove the back cover panel. (5) Remove the electrical parts box. (See photo 3.) (6) Remove 3 valve bed fixing screws (4 ✕ 10) and 4 ball valve

and stop valve fixing screws (5 ✕ 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screw (5 ✕ 10) in the

rear of the unit and then remove the right side panel. (8) Collect the refrigerant. (9) Remove welded pipes of Accumulator inlet and outlet. (10) Remove 2 Accumulator leg fixing screws (4 ✕ 10).

Photo 10

Terminal cover

Compressor

fixing nut

Accumulator

Compressor (MC)

Accumulator leg

Accumulator leg fixing screws

Note: Collect refrigerant without spreading it in the air.

100

Mitsubishi PUHZ-P100VHA(1), PUHZ-P125VHA(1), PUHZ-P140VHA(1) Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual