Mitsubishi PUHZ-P100VHA2.UK, PUHZ-P125VHA2.UK, PUHZ-P125VHA21.UK, PUHZ-P140VHA2.UK, PUHZ-P140VHA21.UK Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit [model names] PUHZ-P100VHA2

PUHZ-P125VHA2

PUHZ-P140VHA2

PUHZ-P100VHA3 PUHZ-P125VHA3

[Service Ref.]

PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P125VHA21.UK PUHZ-P140VHA2.UK PUHZ-P140VHA21.UK PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK

March 2009

No.OCH415

REVISED EDITION-B

Revision:

• PUHZ-P100/125/140VHA3. UK are added in REVISED EDITION-B.

• Some descriptions have been modified.

•

Please void OCH415

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.

PUHZ-P140VHA3

PUHZ-P140VHA3.UK

CONTENTS

1. TECHNICAL CHANGES

2. REFERENCE MANUAL

3. SAFETY PRECAUTION

4. FEATURES

5. SPECIFICATIONS

6. DATA

7. OUTLINES AND DIMENSIONS

8. WIRING DIAGRAM

9. WIRING SPECIFICATIONS

10.

REFRIGERANT SYSTEM DIAGRAM

11. TROUBLESHOOTING

12. FUNCTION SETTING

13. EASY MAINTENANCE FUNCTION

14.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

15. DISASSEMBLY PROCEDURE

PARTS CATALOG (OCB415)

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2

2 3 6

7

8 11 13

14

19

21

71

78 81

91

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

1

TECHNICAL CHANGES

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK PUHZ-P125VHA2

1.UK PUHZ-P125VHA3.UK

PUHZ-P140VHA21.UK PUHZ-P140VHA3.UK

OUTDOOR CONTROLLER BOARD (C.B) has been changed. (Corresponding to the additional combination between PKA-RP

* In case of UL error, the compressor may be damaged if the unit is restarted by remote controller. To avoid the damage, unit has the system that is not able to be restarted unless the power is turned OFF once.

•HAL/KAL, PCA-RP•KA and PEAD-RP•JA(L))

PUHZ-P125VHA2.UK PUHZ-P125VHA21.UK PUHZ-P140VHA2.UK PUHZ-P140VHA21.UK

4-WAY VALVE and COIL (21S4) have been changed.

2

REFERENCE MANUAL

INDOOR UNIT’S SERVICE MANUAL

Model name Service Ref.

PLA-RP50/60/71/100/125/140BA PLA-RP140BA2

PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA(#1) PCA-RP50GA2 PCA-RP50GA2(#1)

PCA-RP71/125HA

PKA-RP50GAL PKA-RP50GAL(#1)

PKA-RP60/71/100FAL PKA-RP60/71/100FAL(#1) PKA-RP50FAL2 PKA-RP50FAL2(#1)

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

PEAD-RP60/71/100GA

PKA-RP60/71/100KAL

PKA-RP35/50HAL

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

PLA-RP50/60/71/100/125/140BA(#2).UK PLA-RP50/60/71BA PLA-RP140BA2R1.UK

PCA-RP71/125HA(#1)

PEAD-RP50/60/71/125/140EA(#1).UK PEAD-RP100EA2(#1).UK

PEAD-RP60/71/100GA(#1).UK

PKA-RP60/71/100KAL.TH

PKA-RP35/50HAL

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

1.UK

Service

Manual No.

OCH412 OCB412

OC328

OC329

OC330

OC331

HWE0521

HWE0506

OCH452

OCB452

OCH453 OCB453

OCH454

OCB454

2

3

SAFETY PRECAUTION

3-1. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

Use new refrigerant pipes.

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.

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.

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

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

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

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.

Tools for R410A Gauge manifold Charge hose

Gas leak detector

Torque wrench

Flare tool Size adjustment gauge Vacuum pump adaptor

Electronic refrigerant charging scale

Handle tools with care.

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

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

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

Do not use a charging cylinder.

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

Ventilate the room if refrigerant leaks during

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.

operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

[1] Cautions for service

(1) Perform service after recovering 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.)

3

Unit

Gravimeter

[3] Service tools

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

No. Tool name 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)

· Cylinder with syphon

8 Refrigerant recovery equipment

specifications

. (UNF1/2)

4

Cautions for refrigerant piping work

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.)

Diagram below: Piping diameter and thickness

Nominal

dimensions(inch)

1/4 3/8 1/2 5/8 3/4

Outside

diameter

6.35

9.52

12.70

15.88

19.05

(mm)

Thickness

R410A R22

0.8

1.0

—

(mm)

0.8

1.0

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 its working pressure is higher than that of other refriger ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been speci fied 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 inch, the dimension B changes. Use torque wrench corresponding to each dimension.

Dimension A

Flare cutting dimensions

Nominal

dimensions(inch)

1/4 3/8 1/2 5/8 3/4

Outside

diameter

6.35

9.52

12.70

15.88

19.05

Dimension A

R410A R22

9.1

13.2

16.6

19.7

—

+0

( )

-0.4

9.0

13.0

16.2

19.4

23.3

(mm)

Flare nut dimensions

dimensions(inch)

Nominal

1/4 3/8 1/2 5/8 3/4

Outside

diameter

6.35

9.52

12.70

15.88

19.05

R410A

17.0

22.0

26.0

29.0

—

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

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

: 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.

Air purge, refrigerant charge and Operation check Gas leak check Refrigerant recovery 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 Refrigerant charge Check the degree of vacuum. (Vacuum

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

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

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Dimension B

(mm)

Dimension B

+

R22

17.0

22.0

24.0

27.0

36.0

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)

+36.0mm for indoor unit of RP100, 125 and 140

5

4 FEATURES

PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2 PUHZ-P140VHA21.UK PUHZ-P125VHA3.UK

PUHZ-P100VHA2.UK PUHZ-P100VHA3.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.

PUHZ-P140VHA3.UK

1.UK

6

5 SPECIFICATIONS

Service Ref.

Mode

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) % No. Fan motor output Airflow

OUTDOOR UNIT

Defrost method Noise level

Dimensions

Weight Refrigerant Charge Oil (Model) Pipe size O.D.

Connection method

Between the indoor & outdoor unit

REFRIGERANT PIPING

/min(CFM

*

Cooling Heating

W

D H

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

kg(lbs)

Liquid

Gas

mm(in.)

mm(in.) Indoor side Outdoor side Height difference Piping length

A A

kW

W

kW

dB dB

L

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

Cooling

Heating

Single, 50Hz, 230V

12.26

12.62

28

Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

TNB220FLHMT

2.9

Inverter

HP switch

Discharge thermo

—

Plate fin coil

Propeller fan % 1

0.060

)

60(2120)

Reverse cycle

50 54

950(37-3/8)

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

943(37-1/8)

75(165)

R410A

3.0(6.6)

0.87(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 50m

Service Ref.

Mode

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) % No. Fan motor output Airflow

OUTDOOR UNIT

Defrost method Noise level

Dimensions

Weight Refrigerant Charge Oil (Model) Pipe size O.D.

Connection method

Between the indoor & outdoor unit

REFRIGERANT PIPING

/min(CFM

*

Cooling

Heating

W

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

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

kg(lbs)

mm(in.) mm(in.)

A A

kW

W

kW

dB dB

PUHZ-P125VHA2.UK PUHZ-P125VHA2 PUHZ-P125VHA3.UK

Cooling

17.37 28

3.4

)

51 55

L

1.UK

Heating

Single 50Hz, 230V

16.74

Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

TNB306FPGM

Inverter

HP switch

Discharge thermo

30

Plate fin coil

Propeller fan % 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)

99(218)

R410A

4.5(9.9)

0.87(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 50m

PUHZ-P140VHA2.UK PUHZ-P140VHA2

PUHZ-P140VHA3.UK

Cooling

22.48

29.5

3.9

52 56

1.UK

Heating

21.31

7

6 DATA

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

Service Ref.

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

PUHZ-P125VHA2.UK PUHZ-P125VHA2 PUHZ-P125VHA3.UK

PUHZ-P140VHA2.UK PUHZ-P140VHA2 PUHZ-P140VHA3.UK

1.UK

10m

2.9

4.3

Piping length (one way)

20m

3.0

4.4

6-2. COMPRESSOR TECHNICAL DATA

Unit

Compressor model

Winding

Resistance

(  )

U-V

U-W

W-V

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

TNB220FLHMT

0.88

PUHZ-P125,140VHA2.UK PUHZ-P125,140VHA21.UK PUHZ-P125,140VHA3.UK

TNB306FPGM

0.53

30m

3.6

4.5

(at 20˚C)

Initial

40m

4.2

5.1

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

50m

4.8

5.7

charged

3.0

4.5

8

6-3. NOISE CRITERION CURVES

MICROPHONE

1m

1.5m

UNIT

PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

90

80

70

MODE

COOLING

HEATING

SPL(dB)

50

54

LINE

NC-70

PUHZ-P125VHA2.UK PUHZ-P125VHA2

1.UK

PUHZ-P125VHA3.UK

90

80

MODE

COOLING

HEATING

GROUND

SPL(dB)

51 55

LINE

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS

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

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PUHZ-P140VHA2.UK PUHZ-P140VHA2

1.UK

PUHZ-P140VHA3.UK

90

80

MODE

COOLING

HEATING

SPL(dB)

52 56

NC-60

NC-50

NC-40

NC-30

NC-20

LINE

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

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

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

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

9

6-4. STANDARD OPERATION DATA

Representative matching

Mode

Capacity

To ta lElectrical circuitRefrigerant circuitIndoor side

Input

Indoor unit

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

side

Outdoor

SHF

D.B.

W.B.

D.B.

W.B.

W

kW

V

kW

A

V

A

MPa

(.f/%)

MPa

(.f/%)

°C

m

°C

PLA-RP100BA PLA-RP125BA PLA-RP140BA(2)

Cooling

9,400

3.12

PLA-RP100BA PLA-RP125BA PLA-RP140BA(2)

0.14

0.94

PUHZ-P100VHA2 PUHZ-P100VHA3

12.26

2.90

(29.6)

0.92

(9.4)

72.7

48.6

10.1

5

27

19

14.8

35

24

0.74

Heating

11, 200

3.28

1 , 50

230

0.13

0.87

1 , 50

230

12.62

2.57

(26.2)

0.62

(6.3)

75.5

41.4

0.1

5

20

15

43.4

7

6

—

Cooling

12,300

4.09

0.15

1.00

PUHZ-P125VHA2 PUHZ-P125VHA3

17.37

2.68

(27.3)

0.86

(8.8)

67.8

45.5

6.8

5

27

19

13.6

35

24

0.71

1 , 50

230

1 , 50

230

Heating

14,000

4.11

0.14

0.94

16.74

2.56

(26.1)

0.68 (6.9)

64.5

43.4

1.3

5

20

15

44.2

7

6

—

Cooling

13,600

5.21

1 , 50

230

0.16

1.07

PUHZ-P140VHA2 PUHZ-P140VHA3

1 , 50

230

22.48

2.79

(28.5)

0.79

(8.1)

72.7

47.0

4.4

5

27

19

12.9

35

24

0.71

Heating

16,000

4.98

0.15

1.00

21.31

2.75

(28.1)

0.64 (6.5)

70.8

47.2

1.0

5

20

15

48.0

7

6

—

BF

0.21

—

0.18

—

The unit of pressure has been changed to MPa based on international SI system. The conversion factor is : 1(MPa)=10.2(kgf/cm²)

10

0.14

—

7 OUTLINES AND DIMENSIONS

417

66 42

45

56

(19)37028

53

175600175

330

2-12%36 oval holes

(Foundation Bolt M10)

Air Discharge

Rear Air Intake

Side Air Intake

2-U Shaped notched holes

(Foundfation Bolt M10)

Installation Feet

30

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 Knockout Hole Details

Example of Notes

···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)

···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)

+1 ···Indication of STOP VALVE connection location.

The diagram below shows a

basic example.

Explantion of particular details is

given in the installation manuals etc.

Over10

500

Over100

Dimensions of space needed

for service access are

shown in the below diagram.

Service space

30

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

71

Drain hole

(5-W33)

Bottom piping hole

(Knockout)

Air Intake

Rear Air Intake

Handle for moving

23

943

473

950

322

+1 447

+1 443

670

Terminal Connections

Left···Power supply wiring

Reight···Indoor/Outdoor wiring

Earth terminal

Service panel

Handle for moving

1

2

19 55

23 27 92

92

4075

73 63

Right piping hole

(Knockout)

Right trunking hole

(Knockout)

Power supply wiring hole

(2-W27Knockout)

W

92

27 55

73

23

63

40

92

65

45

Front piping hole

(Knockout)

Front trunking hole

(Knockout)

Power supply wiring hole

(2-W27Knockout)

W

92

4045

65

92

27 55

23 73 63

Rear piping hole

(Knockout)

Rear trunking hole

(Knockout)

Power supply wiring hole

(2-W27Knockout)

W

92

FOUNDATION

Over 10mm

Over 5

00mm

Over 1

00mm

FREE

OUTDOOR UNIT PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK

Unit : mm(inch)

11

PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2 PUHZ-P140VHA2

1.UK

PUHZ-P125VHA3.UK PUHZ-P140VHA3.UK

(19)28 370

2-U Shaped notched holes

(Foundation Bolt M10)

417

Unit : mm(inch)

1076

53 56

45

42

66

2-12 x 36 Oval holes

(Foundation Bolt M10)

Terminal connection

Left···Power supply wiring

Right···Indoor/Outdoor wiring

Service panel

Handle for moving

+1 447

+1 443

2

1

Front piping cover

Rear piping cover

71

Bottom piping hole

(Knockout)

Drain hole

(5-W33)

Rear Air Intake

600175 175

Installation Feet

330

Air Discharge

30

Side Air Intake

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

FOUNDATION

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

3 FOUNDATION BOLTS

2 SERVICE SPACE

Dimensions of space needed

for service access are

shown in the below diagram.

150

Over

FREE

Over

r 150mm

Ove

500

30

Less than

Over

500

Over

10

Service space

Over 10mm

950

Earth terminal

322

Handle for moving

Side Air Intake

Rear Air Intake

635

1350

Handle for moving

371

Air intake

23

27Knockout)

W

Power supply wiring hole

(2-

Rear trunking hole

(Knockout)

45 40

Right trunking hole

(Knockout)

27Knockout)

W

Power supply wiring hole

(2-

75 40

Right piping hole

(Knockout)

4540

27Knockout)

W

Power supply wiring hole

(2-

81 219

92

W

92

W

73 63

92

W

14514522030 145

Rear piping hole

(Knockout)

92

65

27 55

23 73 63

92

19 55

73 63 23 27 92

23

27 55

65

92

1 FREE SPACE (Around the unit)

The diagram below shows a

basic example.

Explantion of particular details is

given in the installation manuals etc.

Over 10mm

Over 1000mm

Example of Notes

+1 ···Indication of STOP VALVE connection location.

···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)

···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)

12

Piping Knockout Hole Details

Front trunking hole

(Knockout)

Front piping hole

(Knockout)

8 WIRING DIAGRAM

PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2 PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK PUHZ-P140VHA3.UK

SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 MC MF1,MF2 21S4 SV Solenoid Valve (Bypass Valve) CH Crankcase Heater 63H TH3 TH4 TH6 TH7 TH8 LEV-A DCL ACTM CB

Terminal Block<Power Supply, Indoor/Outdoor > Motor Compressor Fan Motors Solenoid Valve (Four-Way Valve)

High Pressure Switch

Thermistor<Outdoor Pipe>

Thermistor<Discharge> Thermistor<Outdoor 2-Phase Pipe> Thermistor<Outdoor> Thermistor<Heatsink> Electronic Expansion Valve

Reactor Active Filter Module Main Smoothing Capacitor

1.UK PUHZ-P140VHA21.UK

P. B.

TABU/V/W TAB S/T TABP1/P2/P TABN1/N2/N DS2,3

IPM N.F. C.B.

F1~F4

Power Circuit Board Connection Terminal<U/V/W-Phase> Connection Terminal<L/N- Phase> Connection Terminal<DC Voltage> Connection Terminal<DC Voltage> Diode Bridge Power Module Noise Filter Circuit Board Controller Circuit Board Fuse<T6.3AL250V>

SW1

Switch<Forced Defrost, Defect History Record Reset, Refrigerant Address>

SW4

Switch<Test Operation>

SW5

Switch<Function Switch>

SW6

Switch<Model Select>

SW7

Switch<Function Setup>

Switch

SW8 SW9

Switch

SWP

Switch<Pump Down>

CN31

Connector<Emergency Operation>

LED1,LED2

Light Emitting Diodes <Operation Inspection Indicators>

CNM

Connector<A-Control Service Inspection Kit> Connector<Connected to Optional M-NET Adapter Board>

CNMNT CNVMNT

Connector<Connected to Optional M-NET Adapter Board>

CNDM

Connector<Connected for Option (Contact Input)>

X51,X52,X54,X55

Relay

+ 2

MF1

MS 3~

MF2

MS 3~

C.B.

1

CNS

WHT)

(

31

TH8

CB

63H

TH7 TH6 TH3 TH4

TRANS

CNAC

(

12

34

tttt

14

TH7/6 (RED)

WHT)

122

1

TH3

TH4

(WHT)

1

63H

(YLW)

CN2

(WHT)

17

7

F3

F4

7

CNF1

(WHT)

7

CNF2

WHT)

(

3

2

1

CNDC

(

PNK)

F2

F1

LED2

3

21S4

(GRN)

LEV-A

M

16

LEV-A (WHT)

LED1

1

CN4

(WHT)

12

2

X52

X55

31

21S4

SV2

(BLU)

SV + 2

3

1

CNVMNT

(WHT)

CNM

(WHT)

X54

31

SV1/CH

(GRY)

CH

+

2

1

CNMNT

(WHT)

CN52C (RED)

1

5

SW5SW8SW4 SWP

14

2

X51

31

SS

(WHT)

When M-NET adaptor is connected

5

+ 1+ 1

SW7

SW6SW1

SW9

CN31

1

3

CNDM

(WHT)

1

CN51

(WHT)

5

ABS

5

SW1

CN5

(WHT)

1

LED2 LED3 LED4

M-NET SUBSTRATE

2 1

CN2M

(WHT)

LED5

TB7

M-NET

SW11

SW12

CND

(WHT)

31

LED1

3

N.F.

LO

NO

1

52C

P. B .

4

1

CNAF

(WHT)

6

7

1

CN2

IPM

(WHT)

+

7 1

CN3

(WHT)

2 1

(RED)

2 1

(WHT)

2

TABN

TABP

CN5

CN4

TAB P2

TAB URED

UVW

t

2

+

MS

3~

TABVWHT

BLK

MC

–

TABW

+

CNDC (PNK)

1

3

2

TAB N1

TABT

DS3

–~

+

~

TABS

DS2

–

~

+

~

TABP1

U

TAB N2

3

1

(RED)

CNAC2

3

1

(WHT)

CNAC1

LI

U

NI

U

2

CN52C

E2

1

2

CN5

EI

2

(BLK)

2

(RED)

DCL

+

—

ACTM

L1 L2

4

16

P

N1 N2

Io

POWER SUPPLY ~/N 230V 50Hz

13

INDOOR UNIT

CY1 CY2

+ 1 MODEL SELECT

S3S2S1NL

TB1

MODEL

SW5-6

ON

100V

OFF

123456

ON

125V

OFF

123456

ON

140V

OFF

123456

+ 2 P125, P140 only + 3 SW5-1 to 5: Function Switch

+

3

SW6

ON OFF

123456

78

ON OFF

123456

78

ON OFF

123456

78

9 WIRING SPECIFICATIONS

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

)

2

Outdoor unit power supply earth

ing

Indoor unit-Outdoor unit *2

Wir

Indoor unit-Outdoor unit earth *2

Wire No. %

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 earth leakage breaker(NV). *2. Refer to 8-3. *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.

P100, 125V P140V

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

230 V 230 V

32 A 40 A

2 % Min. 4 2 % Min. 6 1 % Min. 4 1 % Min. 6

3 % 1.5 (Polar) 3 % 1.5 (Polar)

1 % Min. 1.5 1 % Min. 1.5

2 % 0.3 (Non-polar) 2 % 0.3 (Non-polar)

*4

AC 230 V AC 230 V

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

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

2. Power 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

Isolator

S1

3 poles isolator

S1

A-Control

Outdoor Unit

S2

S3

S2

S3

A-Control

Indoor Unit

Warning: In case of A-control wiring, there is high voltage 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

Unit power supply



 Earth leakage breaker  wiring circuit breaker or

isolating switch

Outdoor unit

L



N

Indoor/outdoor unit connection cable

S1 S2 S3

Indoor unit

S1 S2 S3

1

Remote controller

2

Unit power



supply

 Earth leakage breaker  wiring circuit breaker or

isolating switch

Outdoor unit

L

N



Indoor/outdoor unit connection cable

S1 S2 S3

Indoor unit

S1 S2 S3

1 2

• Synchronized triple

Remote controller

Indoor unit

1 2

S1 S2 S3

Unit power



supply

 Earth leakage breaker  wiring circuit breaker or

isolating switch

14

Outdoor unit

L N



Indoor/outdoor connection cable

S1 S2 S3

Indoor unit

S1 S2 S3

1 2

Remote controller

Indoor unit

1 2

S1 S2 S3

Indoor unit

1 2

S1 S2 S3

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

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.



L N







S1 S2 S3



L N







S1 S2 S3

1 2

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

Simultaneous twin/triple system

* The optional indoor power supply terminal kits are required.



L

 

N

S1

S2

S3







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

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.

Indoor unit specifications 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)

Required

ON OFF 1 2

Set the SW8-3 to ON.

3

(SW8)





L

N

S1

S2

S3

1

2



S2

S3

1

2

Electric heater (For models with heater)

L

N



S1

S2

S3

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





L

N

S1

S2

S3

1

2

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

BLUE

YELLOW

CND or

CN01

control board



Indoor unit

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

the units according to the wiring method.

 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



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 unit earth



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

Electric heater (For models with heater)

L

N



S1

S2

S3

Separate indoor unit/outdoor unit power supplies

YELLOW

BLUE

YELLOW

CN01

CND or

Connectors

Indoor unit

control board

Indoor unit model Indoor unit power supply Indoor unit input capacity Main switch (Breaker)

Indoor unit power supply Indoor unit power supply earth

)

2

Indoor unit-Outdoor unit

(mm

Wiring

Indoor unit-Outdoor unit earth

Wire No. % size

Remote controller-Indoor unit

Indoor unit L-N *4

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

rating

Circuit

Remote controller-Indoor unit *4

*1

*2

*3

RP35~140

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

16 A

2 % Min. 1.5 1 % Min. 1.5 2 % Min. 0.3

–

2 % 0.3 (Non-polar)

AC 230 V

– DC24 V DC12 V

*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use 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.

15

9-3. INDOOR – OUTDOOR CONNECTING CABLE

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

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

Cross section

of cable

Round

Wire size

2

)

(mm

2.5

Number of wires

3

Polarity L(m) *5

Clockwise : S1-S2-S3

50

*1

Flat

2.5

3

Not applicable (Because center wire has no cover finish)

Flat

1.5

4

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

Round

2.5

*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.

(3C Flat cable × 2)

S1 S2 S3

*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.

4

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

2

.

Not

applicable

*2

45

*3

60

*4

Wire No. % Size ($)

Outdoor power supply

Max. 45m

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

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

3 % 1.5 (polar)

1 % Min. 1.5

Indoor/Outdoor separate power supply

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

+ The optional indoor power supply terminal kit is necessary.

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

earth or a poor electrical contact at the intermediate connection point.

Max. 50m

3 % 2.5 (polar)

1 % Min. 2.5

Wire No. % Size ($)

2 % Min. 0.3

Max. 80m

3 % 2.5 (polar) and S3 separated

1 % Min. 2.5

Max. 120m

—

16

9-4. M-NET WIRING METHOD

(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 1.25mm² shield 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.

Group remote controller

Power supply unit for transmission wire

A-control remote

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

(4) Earth 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.

 Bad example (Multi spot earthing of shield wire)

Central remote controller

M-NET transmission wire

controller

Power supply appliance

Refrigerant address 00

M-NET address 01

M-NET type outdoor unit

A-control remote controller

Refrigerant address 00

M-NET address 02

M-NET type outdoor unit

A-control remote controller

Refrigerant address 00

M-NET address 03

Good example 1 (Single spot earthing of shield wire)

Central remote controller

M-NET transmission wire

Good example 2 (Single spot earthing of shield wire)

Central remote controller

M-NET transmission wire

If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the earth wire

and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing

spots. In case of single spot grounding, noise does not enter into the shield wire because the earth wire and shield wire do

not form 1 circuit.

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

installation manual.

Power supply appliance

M-NET type outdoor unit

17

M-NET wiring

(1) Use 2-core x 1.25mm² 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 trans-

mission wire (non-polar) to A terminal 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

Earth wire

Shield part

outdoor unit’s terminal, i.e. A to 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 CITY MULTI 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 CITY MULTI 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”.)

M-NET Address No.

SW11

Switng setting

ones digit

SW12 tens digit

12

3

4

2

5

1

0

9

2

1

0

9

5

1

6

0

7

9

8

3

4

2

5

1

6

0

7

9

8

50

3

4

2

5

1

6

0

7

9

8

~

3

4

2

5

1

6

0

7

9

8

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. [Initial setting: all switches are OFF. (All refrigerant addresses are “00”.)]

Refrigerant address

ON

OFF

1

ON

OFF

1

ON

OFF

1

3

4

5

2

6

0

ON

OFF

1

3

4

5

2

6

8

ON

OFF

1

3

4

5

2

6

1

ON

OFF

1

3

4

5

2

6

9

ON

OFF

1

3

4

5

2

6

2

ON

OFF

1

3

4

5

2

6

10

ON

OFF

1

3

4

5

2

6

3

ON

OFF

1

3

4

5

2

6

11

ON

OFF

1

3

4

5

2

6

4

ON

OFF

1

3

4

5

2

6

12

ON

OFF

1

3

4

5

2

6

5

ON

OFF

1

3

4

5

2

6

13

ON

OFF

1

3

4

2

6

3

4

2

14

3

5

4

5

2

6

OFF

6

7

ON

1

3

4

5

2

6

15

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.

Group A Group B Group C

System controller

Power supply unit for transmission wire

Refrigerant address 00

M-NET address 01

A-control remote controller

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

Group A Group B

System controller

Power supply unit for transmission wire

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

A-control remote controller

Refrigerant address 01

M-NET address 02

TB5

Refrigerant address 01

M-NET address 03

Refrigerant address 00

M-NET address 04

A-control remote controller

Refrigerant address 00

M-NET address 04

A-control remote controller

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

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”.

18

10 REFRIGERANT SYSTEM DIAGRAM

PUHZ-P100VHA2.UK

PUHZ-P100VHA3.UK

Unit : mm(inch)

Refrigerant flow in cooling Refrigerant flow in heating

Service port

Stop valve

Refrigerant GAS pipe

15.88mm(:5/8)

Refrigerant LIQUID pipe

9.52mm(:3/8)

PUHZ-P125VHA2.UK PUHZ-P125VHA21.UK PUHZ-P125VHA3.UK

PUHZ-P125VHA2.UK PUHZ-P125VHA21.UK

PUHZ-P140VHA2.UK PUHZ-P140VHA2

(#50)

Strainer

Service port (check)

Accumulator

Strainer (#40)

Stop valve (with service port)

4-way valve

Muffler

Compressor

.UK PUHZ-P140VHA3.UK

1

1.UK

(check)

Thermistor (TH4)

High pressure protect switch

Outdoor heat exchanger

(#100)

Strainer

Linear expansion valve

Thermistor (TH6)

Thermistor (TH3)

Distributor

(#100)

Strainer

Stop valve

Refrigerant GAS pipe

15.88

mm(:

5/8)

Refrigerant LIQUID pipe

9.52

mm(:

3/8)

Stop valve

(with service port)

(#50)

Strainer

Service port (check)

Strainer (#40)

4-way valve

Accumulator

Bypass valve

Compressor

Strainer

(#100)

Service port (check)

High pressure protect switch

Muffler

Thermistor (TH4)

Strainer

(#100)

Linear expansion valve

Thermistor (TH6)

Distributor

Thermistor (TH3)

Capillary tube (

:

4.0%:3.0%-L200)%2

19

1. Refrigerant recovery (pump down)

Perform the following procedures to recover 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 recovering (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 recovery 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 recovery operation only when the unit is

stopped. However, refrigerant recovery operation cannot be performed until compressor stops even if the unit is stopped. Wait 3 minutes until compressor stops and set the SWP switch to ON again.

3Because the unit automatically stops in about 2 to 3 minutes after the refrigerant recovering 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 3 minutes later.

wIf the refrigerant recovering 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 due to small pressure difference 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.)

 Stop  Operation  Cooling  Heating

<SW4>



ON OFF

12



20

11 TROUBLESHOOTING

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 trouble is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

Unit conditions at service

The trouble is reoccurring.

The trouble is not reoccurring.

Error code

Displayed

Not displayed

Logged

Not logged

Actions to be taken for service (summary)

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 trouble according to “11-5. Troubleshooting by inferior phenomena”.

Consider 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 trouble occurred, matters related to wiring and etc. Reset error code logs and restart the unit after finishing service. There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

Re-check the abnormal symptom. Conduct trouble shooting and ascertain the cause

of the trouble by inferior phenomena”. Continue to operate unit for the time being if the cause is not ascertained. There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

according to “11-5. Troubleshooting

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 Megger and

check that it is 1.0M" or over.

wDo not use 500V Megger 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 12 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.)

21

"TEST RUN" and the currently selected operation mode are displayed alternately.

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. +1

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 2 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 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 protection device 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.

LCD

P1

Abnormality of room temperature thermistor

P2

Abnormality of pipe temperature thermistor/Liquid

P4

Abnormality of drain sensor/Float switch connector open

P5

Drain overflow protection is working. Freezing/overheating protection is working.

P6

Abnormality of pipe temperature

P8

Abnormality of pipe temperature thermistor/Cond./Eva

P9

Abnormality of indoor controller board

Fb

Contents of trouble

LCD

U1~UP

Malfunction outdoor unit

F3~F9

Malfunction

E0~E5

Remote controller transmitting error Indoor/outdoor unit communication error

E6~EF

No error history

---No applied unit

FFFF

Forced compressor stop(due to water leakage abnormality)

PA

outdoor unit

Contents of trouble

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

(microcomputer power supply)

LED1

(remote controller)

LED2

(indoor/outdoor communication)

LED3

Lights when power is supplied. Lights 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.

22



N

,



ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VAN E

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

h

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.)

TEST RU

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 2 to 7.

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

TEST RU

MODE

FAN

VAN E

COOL

HEAT

23

11-3. HOW TO PROCEED "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.

 If the outdoor unit is malfunctioning, the unit number will be "00".  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.

 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 3 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] o r [00]

The refrigerant address will begin to flash approximately 3 seconds after being selected and the self-diagnosis process will begin.

an d

[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)

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



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



).

24

 Press the

address or refrigerant address will flash.

 Cancel self-diagnosis.

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

 Press the

 Press the

ON/OFF

CHECK

ON/OFF

button twice within 3 seconds. The self-diagnosis

button twice within 3 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.

 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

 Switch to the remote controller self-diagnosis mode.

 Press the

change as shown below.

CHECK

button for 5 seconds or more. The display content will

 Press the

FILTER

button to start self-diagnosis.

 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.© Transmission is not possible.

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.

[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

 To cancel remote controller diagnosis

 Press the

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

CHECK

button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will flash. After

25

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

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]

CHECK display

ON/OFF button

CHECK button

ON/OFF

MODE

CHECK

TEST RUN

SET

CHECK

FAN

VAN E

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

CLOCK

h

min

Refrigerant address display

Temperature button

HOUR button

1. Press the CHECK button twice.

2. Press the temperature buttons.

3. Point the remote controller at the sensor to the indoor unit and press the HOUR button.

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

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

• 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 intermit tent buzzer sound, the operation light flashes, and the error code is output. (It takes 3 seconds at most for error code to appear.)

4. Point the remote controller at the sensor to the indoor unit and press the ON/OFF button.

• The check mode is cancelled.

26

• 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”)

rd

0.5 sec.

th

n

On

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

nd

· · · 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.

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

rd

th

n

On

0.5 sec.

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

[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

3E6,E7

Intake sensor error

Indoor/outdoor unit communication error 4 P4 Drain sensor error/Float switch connector open 5 P5 Drain pump error

PA Forced compressor stop (Due to water leakage abnormality) 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

10

11

–

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

5

6

7 8 9

10

11

12 13 14

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

the OPERATION INDICATOR lamp does not come on,

*2 If the beeper sounds 3 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.

E9

UP U3,U4 UF

U2

U1,Ud

U5 U8 U6 U7

U9,UH

– –

Others

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 heatsink

Outdoor unit fan protection stop Compressor overcurrent interruption/Abnormal of power module

Abnormality of superheat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

– –

Other errors

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

there are no error records.

nd

· · · Repeated

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

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

27

11-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

None —

Abnormal points and detection method

1 No voltage is supplied to terminal

block(TB1) of outdoor unit. a) Power supply breaker is

turned off.

b) Contact failure or disconnec-

tion of power supply terminal c) Open phase (L or N phase)

2 Electric power is not supplied

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

3 Electric power is not supplied to

outdoor controller circuit board. a) Disconnection of connector

(CNDC)

4 Disconnection of reactor (DCL)

(Note 1) Refer to indoor unit section for code P and code E. (P.33~35)

Case

1 Check following items.

a) Power supply breaker b) Connection of power supply terminal block (TB1) c) Connection of power supply terminal block (TB1)

2 Check following items.

a) Connection of power supply terminal block (TB1) b) Connection of terminal on outdoor

Disconnection of connector TABT or TABS Refer to 11-9.

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

Judgment and action

power circuit board

F5

(5201)

63H connector open

Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply. 63H: High-pressure switch

5 Disconnection of outdoor noise

filter circuit board or parts failure in outdoor noise filter circuit board

It is especially needed to check

the resistance RS1 on the noise filter cuircuit board.

6 Defective outdoor power circuit

board

7 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

5 a) Check connection of outdoor noise filter circuit board. b) Replace outdoor noise filter circuit board.

Refer to 11-9.

6 Replace outdoor power circuit board.

7 Replace outdoor controller circuit board (When

items above are checked but the units cannot 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.

28

Error Code

EA

(6844)

Eb

(6845)

EC

(6846)

Abnormal points and detection method Judgment and action

Indoor/outdoor unit connector miswiring, 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 miswiring 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”.

Miswiring 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 miswiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

Start-up time over

The unit cannot finish start-up process within 4 minutes after power on.

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

3 4 or more indoor units are connected to one outdoor unit. 4 Defective transmitting receiving

circuit of outdoor controller

circuit board 5 Defective transmitting receiving

circuit of indoor controller board

6 Defective indoor power board 7 2 or more outdoor units have

refrigerant address “0” .

(In case of group control) 8 Noise has entered into power supply or indoor / outdoor unit connecting wire.

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

4 Defective transmitting receiving

circuit of outdoor controller circuit board

5 Defective transmitting receiving

circuit of indoor controller board

6 Defective indoor power board 7 2 or more outdoor units have

refrigerant address “0” .

(In case of group control) 8 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

1 Contact failure of indoor/ outdoor unit connecting wire 2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

7 2 or more outdoor units have

refrigerant address “0” .

(In case of group control) 8 Noise has entered into power

supply or indoor/outdoor unit connecting wire.

Case

1 Check disconnection or looseness or polar-

ity 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.

29

Error Code

U1

(1302)

U2

(1102)

Abnormal points and detection method

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

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 A or B are detected simultaneously for 10 minutes continuously after 6 minutes past from compressor start-up (including the thermostat indication or recovery from defrosting). <Condition A>

• 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 fully 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

operation 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

1~6 Check indoor unit and repair defect.

7 Check if stop valve is fully 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.)

4~6 Turn 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 turned on 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.)

30

Error Code

U3

(5104)

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

Abnormal points 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.)

Case

1 Disconnection or contact failure of connector (TH4) on

the outdoor controller circuit board

2 Defective thermistor 3 Defective outdoor controller

circuit board

1 Disconnection or contact failure

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

(

CN3

2 Defective thermistor

3 Defective outdoor controller

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.

U5

(4230)

U6

(4250)

Thermistors

Symbol

Temperature of heatsink

Abnormal if heatsink thermistor(TH8) detects temperature indicated below. P100-140V·············79:

Power module

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

Name Thermistor <Outdoor pipe>

TH3

Thermistor <Outdoor 2-phase pipe>

TH6

Thermistor <Outdoor>

TH7

Thermistor <Heatsink>

TH8

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 Airflow 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 com-

pressor. Refer to 11-9 (Outdoor power circuit

board).

4 Check compressor referring to 11-6. 5 Replace outdoor power circuit board.

31

Error Code

U8

(4400)

U9

(4220)

Ud

(1504)

UF

(4100)

UH

(5300)

UL

(1300)

Abnormal points and detection method

Outdoor fan motor

Abnormal if rotational frequency of the fan motor is not detected during DC fan motor 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.

Overvoltage or voltage shortage and 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 volt-

age 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.

Overheat 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.) Abnormal if the input current of 38A is detected or the input current of 34A or more is detected for 10 seconds.

Low pressure

Abnormal if the following conditions are detected for 3 minutes continuously after compressor starts heating operation for 10 minutes. (However, this abnormal detection is disregarded when the compressor driving time exceeds 30 minutes after power is on.) TH7-TH3[4: TH5-Indoor room temperature[2:

Case

1 Failure in the operation of the DC fan motor 2 Failure in the outdoor circuit controller board

1 Decrease of power supply voltage 2 Disconnection of compressor

wiring

3 Defective noise filter circuit

board

4 Disconnection or loose connec-

tion of CN52C

5 Defective ACT module

Defective ACT module drive circuit

6

of outdoor power circuit board

7 Disconnection or loose connec-

tion of CNAF

8 Defective 52C drive circuit of

outdoor controller circuit board

9 Disconnection or loose connection of CN5 on the outdoor power circuit board 0 Disconnection or loose connection of CN2 on the outdoor power circuit board

Defective outdoor fan (fan

1

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

2 Defective outdoor pipe thermistor (TH3) 3

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

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 noise filter circuit board.

4 Check CN52C wiring.

5 Replace ACT module. 6 Replace outdoor power circuit board.

7 Check CNAF wiring.

8 Replace outdoor controller circuit board.

9 Check CN5 wiring on the outdoor power

circuit board. Refer to 11-9. 0 Check CN2 wiring on the outdoor power circuit board. Refer to 11-9.

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

TH7:Outdoor temperature * In case of UL error, the compressor may be

damaged if the unit is restarted by remote controller. To avoid the damage, unit has the system that is not able to be restarted unless the power is turned OFF once. .

TH5:Indoor cond./eva. Temperature

32

Error Code

UP

(4210)

Abnormal points and detection method

Compressor overcurrent interruption

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

Case

1 Stop valve of outdoor unit is

closed.

2 Decrease of power supply volt-

age

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective fan of indoor/outdoor

units

5 Short cycle of indoor/outdoor

units

6 Defective input circuit of out-

door controller board

7 Defective compressor

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 con-

troller 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

or

E4

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

1 Abnormal if main or sub remote con-

troller cannot receive any transmission normally from indoor unit of refrigerant address “0” for 3 minutes.

(Error code : E0) 2 Abnormal if sub remote controller could

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

1 Abnormal if indoor controller board

cannot receive any data normally 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)

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 receiv-

ing circuit of indoor controller board of refrigerant address “0”

6 Noise has entered into the

transmission wire of 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 controller: max. 2units

When it is not the above-mentioned problem of

1~3 4 Diagnose remote controllers.

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

trollers 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”or “ERC 00-66”is displayed,

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.

E1

or

E2

Remote controller control board

1 Abnormal if data cannot be read nor-

mally from the nonvolatile memory of the remote controller control board.

(Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be operated normally.

(Error code: E2)

1 Defective remote controller

33

1 Replace remote controller.

Error Code

E3

or

E5

E8

(6840)

Abnormal points 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 and compares the received and transmitted data. Abnormal if these data are judged to be different 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 and compares the received and transmitted data. Abnormal if these data are judged to be different 30 continuous times. (Error code: E5)

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.

Case

1 2 remote controllers are set as

“main.” (In case of 2 remote con- trollers) 2 Remote controller is connected

with 2 indoor units or more. 3 Repetition of refrigerant

address 4 Defective transmitting receiving

circuit of remote controller 5 Defective transmitting receiv-

ing circuit of indoor controller

board 6 Noise has entered into trans-

mission wire of remote control-

ler.

1 Contact failure of indoor/out-

door unit connecting wire 2 Defective communication circuit

of outdoor controller circuit board 3 Defective communication circuit

of indoor controller board 4 Noise has entered into indoor/

outdoor unit connecting wire.

Judgment and action

1 Set a remote controller to main, and the

other to sub.

2 Connect remote controller with only one

indoor unit.

3 Change the address to a separate setting.

4~6 Diagnose remote controller.

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

trollers have no problem. Turn 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 dis-

played, noise may be causing abnormal-

ity.

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.

E9

(6841)

EF

(6607

or

6608)

Ed

(0403)

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.

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 transmission

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 control-

ler 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 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.

2. Abnormal if communication between outdoor controller circuit board and M-NET board is not available.

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.

34

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.

Error Code

P8

Abnormal points and detection method

Pipe temperature

<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

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

TH: Lower temperature between liquid pipe

temperature and condenser/

evaporator temperature

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

1 Slight temperature difference

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

2 Converse connection of extension pipe (on plural units

connection)

3 Converse wiring of indoor/ outdoor unit connecting wire

(on plural units connection)

4 Defective detection of indoor

room temperature and pipe <condenser/evaporator>

temperature thermistor 5 Stop valve is not opened 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)’.

Temperature display of indoor liquid pipe Indoor 1

1234 56

Temperature display of indoor liquid pipe Indoor 2

123456

A-Control Service Tool SW2 setting

Temperature display of indoor condenser/ evaporator pipe Indoor 1

ON

OFF

ON

OFF

123456

Temperature display of indoor condenser/ evaporator pipe Indoor 2

123456

)

ON

OFF

ON

OFF

23Check converse connection of extension pipe or converse wiring of indoor/outdoor unit connecting wire.

<M-NET communication error>

Error Code

A0

(6600)

A2

(6602)

A3

(6603)

Abnormal points and detection method

Duplicate address definition

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

at remote controller indicate the controller that detected abnormality.

Hardware error of transmission processor

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

remote controller indicate the controller that detected abnormality.

BUS BUSY

1. Overtime error by signal 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.

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

Case Judgment and action

1 There are 2 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 LOSSNAY are 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.

1

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.

35

Error Code

A6

(6606)

Abnormal points 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.

Case Judgment and action

1 Data of transmission proces-

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

2 Address forwarding from unit

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.

A7

(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....1.25mm² or 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 receiving

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 receiving

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 troubles 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 dif-

ferent 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.

36

Continued to the next page.

From the previous page.

Error Code

Abnormal points 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 receiving

circuit of indoor unit or remote controller

Same as mentioned in “A7” of the previous page

A7

(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 receiving

circuit of indoor unit or FRESH MASTER

1 If the power supply of

LOSSNAY 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 transmis-

sion 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. When 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.

37

Error Code

A8

(6608)

Abnormal points and detection method

M-NET NO RESPONSE

Abnormal if a message was transmitted and there was 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).

Case Judgment and action

1 Transmitting condition repeats

fault because of noise and the like.

2 Extension of transmission wire

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

• Maximum distance......200m

•

Remote controller line

3 Extension 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.....1.25mm² or more

4 Accidental malfunction of

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 Phenomena No.3 below. 2Check the following.

• Failure of remote controller if “PLEASE

WAIT” is not displayed

• Refer to Phenomena 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.

38

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

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 cool-

ing 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

1Refrigerant shortage 2Filter clogging 3Heat exchanger clogging 4Air duct short cycle

1Linear expansion valve fault

Opening cannot be adjusted well due to linear expan sion 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

Phenomena No.2 on previous page.

Countermeasure

1Check the pair number settings.

1Normal operation

2Normal operation

Check

3 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.

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 pres sure.

• Clean the heat exchanger.

4Remove the shield.

1• Discharging temperature and indoor

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

• Replace linear expansion valve. 2• 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.

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

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 pres sure.

• Clean the heat exchanger.

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

Phenomena

Clean the filter by removing dirt or dust on

No.2 on previous page.

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)

39

12Normal operation

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

Diagnosis flow Cause

Check the display time of “PLEASE WAIT”

after turning on the main power.

6 minutes or more

Check the LED display of the outdoor controller circuit board.

2 minutes

How long is “PLEASE WAIT”

kept being displayed on the

remote controller?

2 to 6 minutes

Are any error codes

displayed on the

remote controller?

YES

or less

NO

“PLEASE WAIT”

• will be displayed during the start-up

diagnosis after turning

on the main power.

Inspection method and troubleshooting

• Normal. The start-up diagnosis will

be over in around 2 minutes.

Are any error codes

displayed on the LED?

NO

YES

• Mis-wiring of indoor/ outdoor connecting wire

• Breaking of indoor/ outdoor connecting wire (S3)

• Defective indoor controller board

• Defective outdoor controller circuit board

• Defective indoor controller board

• Defective remote controller

• 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.

40

Symptoms: Nothing is displayed on the remote controller 

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

NO

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

AC 198V to AC 264V?

NO

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

NO

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

DC 12V to DC 16V?

YES

NO

AC 198V to AC 264V?

YES

NO

• 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

• Miswiring, breaking

or poor connection of

• Check if miswiring, 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 miswiring

or breaking of wire. indoor/outdoor connecting wire

41

• Defective indoor power board

• Replace the indoor

power board.

Symptoms: Nothing is displayed on the remote controller 

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)

NO

Not lighting.

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

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

NO

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

NO

Not displayed.

NO

Is “E8” displayed?

Can the unit be restarted?

Can all the indoor

unit be operated?

NO

YES

• Defective outdoor controller circuit board

YES

• Defective outdoor controller circuit board

NO

• 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.

42

Symptoms: Nothing is displayed on the remote controller 

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?

NO

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

43

• The remote controller wire short-circuits

• Defective indoor controller board

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

• Replace the indoor controller board.

• Before repair Frequent calling from customers

Phone Calls From Customers How to Respond Note



Unit does not operate at all.

Remote controller

The operating display of remote

controller does not come on.

 Unit cannot be restarted for a while after it’s stopped.

 Error code appears and blinks on the display of remote controller.



“PLEASE WAIT” is displayed

on the screen.

 Check if power is supplied to air conditioner. Nothing appears on the display unless power is supplied.  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.

 Error code will be displayed if any protection devices of the air conditioner are actuated. What is error code?

 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.

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



“FILTER” is displayed on the

screen.



“STANDBY” is displayed on the

screen.



“DEFROSTING” is displayed on the screen. (No air comes out of the unit.)

 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.

 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.

 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.

44

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.

 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.

 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.

 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.

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

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

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

 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 does not match the setting of the remote controller during DRY operation.(No air comes out sometimes during DRY operation.)



The fan speed does not match the setting of the remote controller in HEAT operation.

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

 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.

 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.

3)

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 (~). After a while, the up/down vane will be automatically moved according to the setting of the remote controller.

45

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 does not change. (Up/down vane, left/right louver)

 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.

 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”.

 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.

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 does not have that function, “NOT AVAILABLE” will be displayed on the remote controller when “AIR DIRECTION” or “LOUVER” button is pressed.

 Check if you set ON/OFF timer. The air conditioner starts operating at the time designated if ON 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.

 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 “power failure automatic recovery ”.

 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  and . “DEFROSTING” will be displayed on the screen in case of .

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

46

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 does not 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.

47

11-6. HOW TO CHECK THE PARTS PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2

1.UK PUHZ-P140VHA21.UK

PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK PUHZ-P140VHA3.UK

Parts name

Thermistor (TH3) <Outdoor pipe>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <Outdoor 2-phase pipe>

Thermistor (TH7) <Outdoor>

Thermistor (TH8) <Heatsink>

Fan motor(MF1,MF2)

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

Motor for compressor (MC)

U

Check points

Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10~30)

TH4

Normal

160k~410k

Abnormal

TH3

TH6

4.3k~9.6k

Open or short

TH7

TH8

39k~105k

Refer to next page.

Measure the resistance between the terminals with a tester.



(At the ambient temperature 20

)

Normal

P100, P125/140VHA21, P125/140VHA3

P125/P140VHA2

1500 ± 150 1435 ± 150

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



)

Normal Abnormal

Abnormal

Open or short

V

W

Linear expansion valve (LEV-A)

M

Gray

Orange

Red

Yellow

Black

1 2 3 4 5 6

Solenoid valve coil <Bypass valve> (SV) For P125, 140

P100

0.88

P125,P140

0.53

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

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

463

Measure the resistance between the terminals with a tester. (At the ambient temperature 20)

Normal

1450 ± 150

Abnormal

Open or short

Abnormal

Open or short

48

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. Pay 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.

Fuse check

Check the fuse (F5) on outdoor controller board.

board and fan motor.)

Did the fuse blow?

No

Wiring contact check

Contact of fan motor connector (CNF1, 2)

Is there no contact failure?

Yes

Power supply check (Remove the connector (CNF1, 2))

Measure the voltage in the outdoor controller circuit

TEST POINT

 :VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC250~330V

Yes

No

Replace outdoor controller board (C.B) and fan motor (MF1, 2).

Recover wiring.

board.

TEST POINT  :VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V

Is the voltage normal?

No

Yes

Replace the fan motor.

Yes

Check the operation of fan. END

Replace outdoor

controller board.

OK

Check the operation. END

NG

Replace outdoor controller board.

NG

OK

Replace the fan motor.

49

11-7. HOW TO CHECK THE COMPONENTS

Low temperature thermistors

• Thermistor <Outdoor pipe> (TH3)

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

• Thermistor <Outdoor> (TH7)

50

40

Thermistor R0 = 15k' ± 3% B constant = 3480 ± 2%

t =15exp{3480(

R

0: 15k' 10: 9.6k'

11

273+t – 273

30: 4.3k' 40: 3.0k'

)}

20: 6.3k' 25: 5.2k'

Medium temperature thermistor

• Thermistor <Heatsink> (TH8)

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

Rt =17exp{4150(

11

273+t – 323

)}

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

Resistance (k)

30

20

Resistance (k)

10

0

-20-100 1020304050

Temperature ()

200

150

100

50

High temperature thermistor

• Thermistor <Discharge> (TH4)

Thermistor R120 = 7.465k' ± 2% B constant = 4057 ± 2%

Rt =7.465exp{4057(

20: 250k' 30: 160k' 40: 104k' 50: 70k' 60: 48k'

1 1

273+t – 393

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

0

500

400

25 50 75 100 125

Temperature ()

)}

300

200

Resistance (k)

100

0

25

50 75 100 120

Temperature ()

50

g

)

Linear expansion valve

(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 outdoor controller board and the linear expansion valve>

Outdoor controller board

DC12V

1

:4

:3

:2

:1

Gray

Orange

Red

Yellow

Black

Drive circuit

3

4

5

6

:4

:3

:2

:1

LEV

3

2

M

5

1

6

4

Connector LEV-A

OFF

ON

OFF

Output

5678

OFF

ON

OFF

Output

(Phase)

:1

:2

:3

:4

234

1

ON

OFF

ON

OFF

(2) Linear expansion valve operation

Valve position (capacity)

Close

Open

OFF

ON

OFF

ON

OFF

ON



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.

· 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 sound or vibration occurring from the linear expansion valve : however, when the pulse number moves from B to A or when the valve is locked, sound can be heard.

No sound is heard when the pulse number moves from

in case coil is burnt out or motor is locked by open-phase.

· Sound can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve.

B to A





htning (about 32 pulse

Extra ti

Pulse number

500 pulse Opening a valve all the way

51

y

(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 bod

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.

A

Be sure to attach the stopper.

A

52

11-8. EMERGENCY OPERATION

g

(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 opera tion switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

LWhen following abnormalities occur, emergency operation will be available.

Error code

U4

E8

E9

E0 ~ E7

Ed

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

1 Make 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.) 2 For 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.) 3 During 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. 4 Do 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. 5 Do 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

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

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)

ON

CN31

Shorting pins

SW4

ON

Heating

1 2 Cooling

OFF

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

(4) Releasing emergency operation

1 Turn the main power supply off. 2 Set the emergency operation switch (SWE) on indoor controller board to OFF. 3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to OFF. 4 Set SW4-2 on outdoor controller board as shown in the right.

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

SW4

ON

1 2 Coolin

Heatin

53

(5) Operation data during emergency operation

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

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 (room temperature - set temperature)(Tj)

Discharge superheat (SHd)

Sub-cool (SC)

+1 If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data. When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short. And the unit runs emergency operation with the values listed above. +2 If one thermistor is set to open/short, the value of SHd/SC will be different from the list above. [Example] When liquid temperature thermistor (TH3) has an open or short circuit.

Operation mode

COOL

27

5

25

45

50

35

5

30deg

5deg

HEAT

20.5

45

50

22

5

5

30deg

5deg

Remarks

(+1)

(+2)

Thermistor

TH3

TH6

TH5

TH2

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

COOL

45

Ta

Regard normal figure as effective data.

5

HEAT

5

Tb

50

45

54

11-9. TEST POINT DIAGRAM

<CAUTION> CNF1 and CNF2 are high voltage.

Outdoor controller circuit board PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK

PUHZ-P125VHA21.UK PUHZ-P140VHA21.UK PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK PUHZ-P140VHA3.UK

SW1

Forced defrost, detect history record reset, refrigerant address

SW6

Model select

SW4

Test operation

SWP

pump down

SW5

Function switch, model select

SW8

Pipe replace Wiring replace

CNM Connect to A control service tool

CNMNT Connect to M-NET adapter(CN5)

CNVMNT Connect to M-NET adapter(CND)

SW7

Demand control setting

CNDM

1 to 2: Input of low-level sound priority mode 1 to 3: Input of external contact point

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CN4

Transmission to outdoor power circuit board (CN4)

SV1/CH

Crankcase heater (P125, P140 only)

SV2

Bypass valve (P125, P140 only)

LEV-A

Linear expansion valve

TH4

Thermistor <Discharge>

TH3

Thermistor <Outdoor pipe>

TH7/6

Thermistor <Outdoor/ 2-phase pipe>

63H

High pressure switch

FG

V

(Voltage between right pins of PC5C and PC5D, pin 3 and pin 4) (Same as

7(+)-4(-))

(CNF1

VSP

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

6.5V (when operated)

CNF1, CNF2 Connect to the fan motor

1-4: 280V DC 5-4: 15V DC 6-4: 0-6.5V DC 7-4: 15V DC(When stopped)

7.5V DC(When operated)(0V-15V pulse)

CNDC

280V DC (1+, 3-) (Indoor power board)

21S4

Four-way valve

CN2

Connect to the outdoor power circuit board

1-5: Reception from

2-5: Zero cross signal

(0-5V DC)

3,4: Not used 6-5: 16V DC 7-5: 16V DC

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 (220-240V AC)

CNS

S1-S2: 220-240V AC

+ -

Communication power supply D71 Voltage 24V DC

power circuit board

55

Outdoor noise filter circuit board PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2

1.UK PUHZ-P140VHA21.UK

PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK PUHZ-P125VHA3.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))

56

Outdoor power circuit board PUHZ-P100VHA2.UK PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA2 PUHZ-P140VHA2

1.UK

PUHZ-P100VHA3.UK PUHZ-P125VHA3.UK PUHZ-P140VHA3.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) <Heatsink>

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 ACTM

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

57

TABN2 Connect to ACTM

Active filter module PUHZ-P100VHA2.UK PUHZ-P100VHA3.UK PUHZ-P125VHA2 PUHZ-P140VHA2

(1).UK PUHZ-P125VHA3.UK (1).UK PUHZ-P140VHA3.UK

P Connect to the outdoor power circuit board(TABP2)

L1, L2 Connect to the DCL(Reactor)

Upper side

+

Connect to the outdoor power circuit board(TABP1)

Connect to the outdoor

–

power circuit board(TABN1)

Connection and internal circuit diagram

Connect to the outdoor power circuit board(CNAF)

1 : GND 2-1 : 15V DC 3-1 : Control signal 4, 5 : Not used 6-1 : Control signal

DCL

N1 Non-connect

Lower side

N2 Non-connect

lo Connect to the outdoor power circuit board(TABN2)

L1 L2

(+)

(- )

Tester check points of Acive ﬁ lter module

Error condition Normal value (reference)

The unit does not operate (can not be switched ON)

1

(–) and Io open less than 1

(–) and L2

P and L2

P and Io

L2 and Io

1 The symptom when the unit is in open error condition is described to determine open error by tester check.

W

2 SW2 setting : Code "20" display

W

short 100k" ~ 1M

open

short 100k" ~ 1M

open

short 100k" ~ 1M

open

short 100k" ~ 1M

open

ON OFF

16

"

The breaker operates

1

"

The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)

1

W

1

W

1

W

1

W

1

The breaker operates

1

"

The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)

1

The breaker operates

1

"

The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)

1

The breaker operates

1

"

The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)

1

ACTM

P

+

N1 N2

Io

Symptom when the unit is in trouble

Load

58

11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

Typ e

of

switch

Dip

switch

Switch

SW1

SW4

No.

1

Compulsory defrosting

2

3

4

Function Effective timing

+

1 Start Normal

Abnormal history clear

123

Refrigerant address setting

5

6

1

2

Test run Operating OFF

Test run mode setting Heating Cooling

123

w1 Compulsory defrosting should be done as follows.

1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON. 2 Compulsory 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:.

• Compulsory defrosting will finish if certain conditions are satisfied.

w Compulsory 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. +

Clear Normal off or operating

ON

456ON123456ON123456ON123456

012 3

456ON123456ON123456ON123456

456 7

456ON123456ON123456ON123456

891011

456ON123456ON123456ON123456

12 13 14 15

ON

When power supply ON

Under suspension

Type of

Switch

Dip

switch

Push

switch

Switch

SW5

SW7

+4

SW8

SW9

SWP

No.

1

2

3,4,5

6

1

Function Effective timing

No function

Power failure

automatic recovery +2

No function

model select

Setting of demand

control +3

2

Max Hz setting (cooling)

3

Max Hz setting (heating)

4

5

6

1

2

3

1

2

3,4

No function

Defrost Hz setting

No function

Function switch

No function

Pump down

Action by the switch operation

ON OFF

—

Auto recovery

—

SW7-1 SW7-2

OFF

ON

OFF

Max Hz(cooling)

Max Hz(heating)

—

For high humidity

—

Valid

—

Start

OFF

0% (Operation stop)

OFF

ON

% 0.8

—

No auto recovery

—

Refer to next page.

Power consumption (Demand switch ON)

50%

75%

Normal

—

Normal

—

Normal

—

Normal

—

When power supply ON

—

Always

—

Always

—

Always

—

Under suspension

w2 ‘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 not all units have DIP SW. Please refer to the indoor unit installation manual. w3 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)) w4 Please do not use SW7-3~5 ordinarily. Trouble might be caused by the usage condition.

59

(2) Function of connectors and switches

Types

Connector

Switch

CN31

Function Effective timing

Emergency operation

Action by open/short operation

Short Open

Start

Normal

When power supply ON

SW6-1

SW6

SW5-6

SW6-2 SW6-3 SW6-4 SW6-5 SW6-6 SW6-7 SW6-8

MODEL

100V

Model select

125V

140V

SW5-6

ON OFF

123456

ON OFF

123456

ON OFF

123456

ON OFF

123456

ON OFF

123456

ON OFF

123456

SW6

78

SW5-6

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 wire

<Low-level sound priority mode circuit>

Purchased locally

Relay supply

~

SW1

Insulate this point securely as this is not used.

X

Adaptor for external signal input (PAC-SC36NA)

Red 3

Brown 2

Orange 1

Outdoor unit controller board

  

CNDM

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

Max. 10 m including local 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 wire 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

ON

Power consumption

(SW1 on)

0% (Operation stop)

50%

75%

60

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.

[Display] (1) Normal condition

Unit condition

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

(2) Abnormal condition

Indication Error

Outdoor controller board

LED1 (Green) LED2 (Red)

1 blinking 2 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

1 Error code is displayed on remote controller. 2 Refer to service manual for indoor unit.

Connector(63H) is open.

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

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

Startup time over

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.

Error code is not defined.

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 M-NET system

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Error code

Lighted Lighted Lighted Lighted

Lighted

Contents Inspection method

Not lighted Not lighted

Lighted

Error code

+1

F5



Check if connector (63H) on the outdoor controller

board is not disconnected.



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

—



Check if indoor/outdoor connecting wire is connected correctly.



Check if 4 or more indoor units are connected to outdoor unit.

Check if noise entered into indoor/outdoor connecting wire

—

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

00, etc. 08, etc.

C5, H7 etc.

—



Check if indoor/outdoor connecting wire is connected correctly.

E6



Check if noise entered into indoor/outdoor connecting wire or

power supply.

E7



Check if noise entered into indoor/outdoor controller board.



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

—

Check if connecting wire of indoor unit or remote controller

E0

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

E3

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

E4

E5

Check if remote controller is MA remote controller(PAR-21MAA).

EF

Check if noise entered into transmission wire of remote controller. Check if noise entered into indoor/outdoor connecting wire. Re-check error by turning off power, and on again.



Check if connector (CN4) on outdoor controller board and

Ed

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.

A0~A8

Indication of the display

Alternately blinking display

Operation mode

Detailed

reference

P. 3 5 ~

page

P. 2 8

P. 2 9 (EA) P. 2 9 (Eb) P. 2 9

(EC)

+2

P. 3 4 (E8)

P. 3 5 (E9)

P. 3 3

P. 3 4

P. 3 3

P. 3 4

P. 3 8

61

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

+1

Check if stop valves are open.

U2

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

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

expansion valve using a tester.

U1

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

tester.

Check the outdoor fan motor.

U8

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

Ud

Check if stop valves are open.

UF

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

UP

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

UH

U6



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

U3

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

U4



Measure resistance value of outdoor thermistors.

(TH3, TH6, TH7 and TH8)

Detailed

reference

page

P. 3 0

P. 3 2

P. 3 2 P. 3 3 P. 3 2 P. 3 1 P. 3 1 P. 3 1

6 blinking

Abnormality of heatsink temperature

4 blinking

7 blinking

1 blinking

Abnormality of voltage Check 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) Float switch (FS) connector open

Indoor drain overflow protection

3 blinking

Freezing (cooling)/overheating (heating) protection

4 blinking

Abnormality of pipe temperature

1 Error code displayed on remote controller 2 Refer to service manual for indoor unit.

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

U5

Measure resistance value of outdoor thermistor(TH8).

U9

Measure resistance value among terminals on compressor using a tester. Check the continuity of contactor (52C). Check if power supply voltage decreases. Check the wiring of CNAF.

Check if connectors (CN20, CN21, CN29 and CN44) on indoor controller board

P1

are not disconnected.

P2

Measure resistance value of indoor thermistors.

P9

Check if connector (CN31)(CN4F) on indoor controller board is not disconnected.

P4

Measure resistance value of indoor thermistors. Measure resistance value among terminals on drain-up machine using a tester. Check if drain-up machine works.

P5

Check drain function.

Check if indoor unit has a short cycle on its air duct.

P6

Check if heat exchanger and filter is not dirty. Measure resistance value on indoor and outdoor fan motors. Check if the inside of refrigerant piping is not clogged.

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

P8

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

connection)

P. 3 1

P. 3 2

2 2 2

2

62

<Outdoor unit operation monitor function> [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

1ON23456

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.

1 second

interval

Wait for 4 minutes at the longest. (2) When the display lights. (Normal operation) 1 Operation mode display.

(Lighting)

SW2

LED1

1ON23456

The tens digit : Operation mode

Display Operation Model

O C H

d

OFF / FAN

COOLING / DRY +

HEATING

DEFROSTING

wC5 is displayed during replacement operation.

2 Display 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.

Display Contents to be inspected (During operation)

Abnormal high pressure (63H worked)

U1

Abnormal high discharging temperature, shortage of refrigerant

U2

Open/short circuit of discharging thermistor (TH4)

U3

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

U4

Abnormal temperature of heatsink

U5

Abnormality of power module

U6

Abnormality in outdoor fan motor

U8

Overheat protection

Ud

Compressor overcurrent interruption (When Comp. locked)

Display

0 1 2 3

Inspection unit

Outdoor unit Indoor unit 1 Indoor unit 2 Indoor unit 3

UF UH UL

UP P1~P8 A0~A7

Current sensor error Abnormal low pressure Compressor overcurrent interruption Abnormality of indoor units Communication error of M-NET system

The ones digit : Relay output

Display

0 1 2 3 4 5 6 7 8

A

Warming-up

Compressor

— — — — — — —

— ON ON

Compressor

— — —

— ON ON ON ON

—

4-way valve

(Initial setting)

—

— ON ON

—

— ON ON

— ON

Solenoid valve

—

ON

—

ON

—

ON

—

ON

— —

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

63H connector(yellow) is open.

F5

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

E8

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

E9

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

EA

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

Eb

Startup time over

EC

E0~E7

Communication error except for outdoor unit

63

SW2 setting

1ON23456

Display detail

Pipe temperature/Liquid(TH3) – 40~90

Explanation for display Unit

– 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:;

0.5 secs. 0.5secs. 2 secs.

10

:

1ON23456

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.

1

05

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.

4

25

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.

2

45

0~50 wOmit the figures after the decimal fractions.

:

Step

100 times

10 hours

A

1ON23456

Compressor operating frequency 0~255

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-A opening pulse 0~480

1

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

25

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

1

Postponement code display Blinking: During postponement

50

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)

1ON23456

Hz

Pulse

Code

display

Code

display

64

SW2 setting

1ON23456

Display detail

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

Explanation for display

– 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.

15

Unit

:

1ON23456

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.

1

30

0~20

When no error history, “ 0 ” and “– –” are displayed by turns.

:

A

Code

display

Code

display

1ON23456

Thermo 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.

2

45

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.

1

05

65

Minute

SW2 setting

1ON23456

Display detail

The number of connected indoor units

Explanation for display

0~3 (The number of connected indoor units are displayed.)

Unit

1ON23456

Capacity setting display

Outdoor unit setting information

Indoor pipe temperature/Liquid (TH2(1)) Indoor 1 – 39~88

Displayed as an outdoor capacity code.

Capacity

P100V P125V P140V

Code

20 25 28

• The tens digit (Total display for applied setting)

Setting details

H·P /

Cooling only

Single phase / 3 phase

Display details

0 : H·P 1 : Cooling only

0 :

Single phase

2 :

3 phase

• The ones digit Setting details

Defrosting switch

(Example) When heat pump, 3 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.)

0 : Normal 1 : For high humidity

Display details

Code

display

Code

display

:

1ON23456

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.)

8~39

:

66

SW2 setting

1ON23456

Display detail

Indoor setting temperature 17~30

Explanation for display Unit

17~30

:

1ON23456

Outdoor pipe temperature/2-phase (TH6)

-39~88

Outdoor outside temperature (TH7)

-39~88

Outdoor heatsink temperature (TH8)

-40~200

Discharge superheat. SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Sub cool. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH2

-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

1ON23456

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

Hz

V

67

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.

1

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

00

%

Code

display

1ON23456

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/2-phase (TH6) 7: Outdoor outside temperature (TH7) 8: Outdoor heatsink (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.

1

25

Code

display

Code

display

Code

display

Hz

1ON23456

Fan step on error occurring 0~10

0~10

Step

68

SW2 setting

1ON23456

Display detail

LEV-A opening 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.

1

30

Pulse

1ON23456

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/2-phase (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.

15

-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.

15

-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.

15

:

1ON23456

Outdoor outside temperature (TH7) on error occurring

-39~88

Outdoor heatsink temperature (TH8) on error occurring

-40~200

69

-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.

15

-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.)

:

SW2 setting

1ON23456

Display detail

Discharge super heat on error occurring SHd 0~255

Cooling = TH4-TH6 Heating = TH4-TH5

Explanation for display

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.

1

50

Unit

:

1ON23456

Sub cool on error occurring. SC 0~130

Cooling = TH6-TH3 Heating = TH5-TH2

Thermo-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.

1

15

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.

4

15

-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

:

1ON23456

U9 Error status during the Error postponement period

Description Detection point Display

Normal Overvoltage error Undervoltage error Input current sensor error

1-phase open error

L Abnormal power synchronous signal PFC/ACTM errorUndervoltage

 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.

—

70

00 01 02

04

08

20

Code

display

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 1

LOSSNAY connectivity

Power supply voltage Auto operating mode Frost prevention temperature Humidifier control

Change of defrosting control

Settings

OFF ON Average data from each indoor unit Data from the indoor unit with remote controller Data from main remote controller Not supported Supported Supported 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

(Indoor unit does not intake outdoor air through LOSSNAY (Indoor unit intakes outdoor air through LOSSNAY)

Mode No.

)

01

02

03

04

05

15

16

17

Setting No.

1 2 1 2 3 1 2 3 1 2 1 2 1 2 1 2 1 2

Initial setting

(when sent from the factory)

Remarks

The setting is applied to all the units in the same refrigerant system.

Meaning of "Function setting" Mode02: indoor temperature detecting

OUTDOOR

INDOOR

REMOTE (MAIN)

No.

Indoor temperature(ta)=

No.1

Average data of the sensor on all the

Initial

ta=(A+B)/2 ta=(A+B)/2 ta=A ta=A

setting

indoor units

No.2

The data of the sensor

ta=A ta=B ta=A ta=A on the indoor unit that connected with remote controller

No.3

The data of the sensor

ta=C ta=C ta=C ta=C on main remote controller.

INDOOR

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

INDOOR

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

*2 Can be set only when the outdoor unit is an inverter type.

71

(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 of Operating Prodedure.

• 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 of Operating Prodedure.

• 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 of Operating Prodedure.

: Initial setting (Factory setting

- : Not available

4-Way

Setting

Function Settings

Mode

No.

cassette

PLA-BA

Filter sign 100h 1

Air flow (

Fan speed

No.of air outlets 4 directions 1 - - - -

Optional high efficiency filter Vane setting

Energy saving air Disabled flow(Heating mode

Optional humidifier (

PLA only

Vane differential setting in heating mode (

cold wind prevention

Swing

Set temperature in heating mode(4 deg up

Fan speed during the Extra low 1 heating thermo OFF

Fan speed during the cooling thermo OFF

Detection of abnormality of the pipe temperature (P8)Not available

1. PKA-HAL/KAL: 2 deg up

w

)

2500h 07 2

No filter sign indicator Quiet Standard High ceiling

3 directions 09 2 - - - 2 directions Not supported Supported No vanes (Vane No.3 setting : PLA only Vane No.1 setting Vane No.2 setting

)

Enabled Not supported Supported

No.1 setting (TH5: 24-28

No.2 setting (Standard,TH5:28-32

)

No.3 setting (TH5: 32-38 Not available Swing Available Wave air flow Available

+1

Not available

Stop Set fan speed Set fan speed Stop Available

)

PLA-BA

}

3 1- --

08 2 - - -

3- --

3-- -1

10

2

)

1- --

11 2 - - -

3- -1

12

2 1

13

2 1- -

)

14 2 - -

3- 1

23

2 1

24

2

25 2

3 1

27

2 1

28

2

Ceiling

concealed

PEAD-EA(2)

PEAD-GA

---

-

---

-

-- --

--

Ceiling suspended

PCA-GA(2)

PCA-KA

-

PCA-HA

PKA-GAL

PKA-FAL(2)

--

)

Wall

mounted

PKA-HAL PKA-KAL

-

Floor

standing

PSA-GA

-

•

PEAD-RP

Filter sign 100h 1

External static pressure

External static pressure Set temperature in heating

mode(4 deg up

Fan speed during the heating thermo OFF

Fan speed during the cooling thermo OFF

Detection of abnormality of the pipe

JA(L)

Function Settings

2500h 07 2 No filter sign indicator

35/50/70/100/150Pa

)

Available Not available Extra low Stop Set fan speed

Set fan speed Stop

Available Not available

Mode No.

08 10

24

25

27

28

: Initial setting

Setting

No.

(

Factory setting

3

Refer to the right table

1 2

1 2 3

1 2

72

)

External static

pressure

35Pa 50Pa 70Pa 100Pa 150Pa

Setting No.

Mode No. 08 Mode No. 10

2 3 1 2 3

1 1 2 2 2

Initial setting

(

Factory setting

)

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  to  .

Setting number

Mode number



Refrigerant address Unit number













Selecting functions using the wired remote controller



Check the function selection setting.



Switch to function setting mode.

(Press



and  at the same time

For modes 15 and higher, press

with the remote controller stopped.)



Specify refrigerant address 00 (outdoor unit)



Specify unit No. 00. (indoor unit)

(Use



and .)



Enter the setting.

(Press



Select mode No. 02



.)

(Specified indoor unit: FAN operation)

(room temperature detection position).



Select setting No. 03 (remote controller fixed).

(Use



and .)





and  at the same time.

NO

Modes 01 to 14 can be activated by pressing buttons



and



simultaneously, and modes 15 to



28 by pressing buttons

and .

YES

Change refrigerant address or unit No.



Enter the setting.

(Press



.)

Example: Selecting room temperature detection position

NO

Finished

YES



Ending function display

(Press



and  at the same time.)

The above procedure must be carried out only if changes are necessary.

73



[Operating Procedure]

 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  to  , fill in the "Check" column in Table 1, and then change them as necessary. For initial settings, refer to the indoor unit's installation manual.

 Switch off the remote controller.

 Hold down the ( mode is 15 to 28)and 

buttons simultaneously for at least 2 seconds. will start to blink,

and then the remote controller's display content will change as shown below.

* If the unit stops after

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  ), and then restart from step  .

 Set the indoor unit number.

 Press the

area.

FILTER

Refrigerant address display section

FUNCTION SELECTION

ON/OFF

button so that "- -" blinks in the unit number display

Unit number display section

FUNCTION SELECTION

blinked for 2 seconds or "88" blinks in the room temperature display area for 2 seconds, a transmission error may have occurred.

TEST

 Set the outdoor unit's refrigerant address.

 Press the [

refrigerant address. The refrigerant address changes from "00" to "15". (This operation is not possible for single refrigerant systems.)

 Press the [

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.

CLOCK] buttons ( and ) to select the desired

CLOCK] buttons ( and ) to select the unit number

* 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".

 Check the refrigerant address and unit number.

 Press the

number. After a while, "- - " will start to blink in the mode number display area.

* "88" will blink in the room temperature display area if the selected refrigerant

address does not exist in the system. Furthermore, if 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  and  to set the correct ones.

 Select the mode number.

 Press the [ TEMP] buttons ( and ) to set the desired mode

number. (Only the selectable mode numbers can be selected.)

 Select the setting content for the selected mode.

 Press the

blink, so check the currently set content.

MODE

Mode number display section

button to confirm the refrigerant address and unit

"F"

appears and blinks in the unit number display area and the

button. The currently selected setting number will

MENU

 When the refrigerant address and unit number are confirmed by pressing the

MODE

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.

Example) When the refrigerant address is set to 00 and the unit number is 02.

Designate operation

* When grouping different refrigerant systems, if an indoor unit other than the

one to which the refrigerant address has been set to perform 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.

Mode number display section

 Press the [

number.

button, the corresponding indoor unit will start fan operation. This

00 refrigerant address

Outdoor unit

Indoor unit

TEMP] buttons ( and ) to select the desired setting

Unit number 01 Unit number 02

Remote controller

Mode number 02 = Indoor tempreture detection

Fan draft

Unit number 03

Setting number display section

 Register the settings you have made in steps  to  .

 Press the

to blink and registration starts.

* If " - - - " is displayed for both the mode number and setting number and "

Check to see if there are any sources of noise or interference near the transmission path.

 If you wish to continue to select other functions, repeat steps  to  .

 Complete function selection.

 Hold down the ( mode is 15 to 28) and buttons

simultaneously for at least 2 seconds. After a while, the function selection screen will disappear and the air condi-

tioner OFF screen will reappear.

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.

MODE

button. The mode number and setting number will start

FILTER

Setting number 1 = Indoor unit operating average

The mode number and setting number will stop blinking and remain lit, indicating the end of registration.

" blinks in the room temperature display area, a transmission error may have occurred.

TEST

* 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.)

Setting number 3 = Remote controller built-in sensor

74

12-1-2. Selecting functions using the wireless remote controller (Type C)

h

K

minhh

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]

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.

CHECK

SET

FAN

VAN E

LOUVER

RESET

TEMP

AUTO STOP

AUTO START

h

min

CLOCK

ON/OFF

MODE

CHECK

TEST RUN

[Operating instructions]

1 Check the function settings. 2 Press the button twice continuously. → CHECK is lit and “00” blinks.

CHEC

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 (1 second) 2 = 2 beeps (1 second each) 3 = 3 beeps (1 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) 2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated 3 times) * 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.

 Check the function selection setting.

 Switch to function selection mode.

(Enter address "50" in troubleshooting mode, then press the HOUR button.)

 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 not specify the refrigerant address.

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation).



Troubleshooting mode is the mode entered when you press the INSPECT button twice to display "INSPECT".





NO

Change unit No.

(Set address "24" while still in troubleshooting mode, then press the HOUR button.)

 Select setting No. "02" (OFF). (Set address "02" while still in troubleshooting mode, then press the HOUR button.)

NO

Finished

YES

 End function selection mode. (End troubleshooting mode.)

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.

YES

75

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")

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 /

Room air temperature display setting ("ROOM TEMP DISP SELECT")

(2) (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.

 Japanese (JP),  English (GB),  German (D),  Spanish (E),  Russian (RU),  Italian (I),  Chinese (CH), French (F)

[4] -2. Function limit (1) Operation function limit setting (operation lock)

• To switch the setting, press the [ ON/OFF] button.  no1 : Operation lock setting is made on all buttons other than

ON/OFF] button.

the [

 no2 : Operation lock setting is made on all buttons .  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 2 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.  ON (Initial setting value) : The automatic mode is displayed when

the operation mode is selected.

 OFF : The automatic mode is not displayed

when the operation mode is selected.

(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.  LIMIT TEMP COOL MODE :

The temperature range can be changed on cooling/dry mode.

 LIMIT TEMP HEAT MODE :

The temperature range can be changed on heating mode.

 LIMIT TEMP AUTO MODE :

The temperature range can be changed on automatic mode.

 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 

Item 2

°F setting ("TEMP MODE /°F")



[ ]

• 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 3 (Setting content)



[4] -3. Mode selection setting (1) Remote controller main/sub setting

• To switch the setting, press the [ ON/OFF] button.

 Main : The controller will be the main controller.  Sub : The controller will be the sub controller.

(2) Use of clock setting

• To switch the setting, press the [ ON/OFF] button.

 ON : The clock function can be used.  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.).

 WEEKLY TIMER (initial setting):

The weekly timer can be used.

 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 n

umber setting for error situation

• To switch the setting, press the [ ON/OFF] button.

 CALL OFF:

The set contact numbers are not displayed in case of error.

 CALL **** *** **** : The set contact numbers are displayed in case

of error.

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 [

)] button to move the cursor to the right (left). Press the [ CLOCK

(

) and ( )] button to set the numbers.

(

TEMP. ( ) and

[4] -4. Display change setting (1) Temperature display / °F setting

• To switch the setting, press the [ ON/OFF] button.

  : The temperature unit  is used.  °F : The temperature unit °F is used.

(2) Room air temperature display setting

• To switch the setting, press the [

ON/OFF] button.

ON : The room air temperature is displayed. OFF : The room air temperature is not displayed.

(3) Automatic cooling/heating display setting

• To switch the setting, press the [

ON/OFF] button.

 ON : One of "Automatic cooling" and "Automatic heating" is displayed

under the automatic mode is running.

 OFF : Only "Automatic" is displayed under the automatic mode.

76

[Function selection flowchart]

Setting language (English)

Change Language

Normal display (Display when the air conditioner is not running)

Hold down the button and press the button for 2 seconds.

Remote controller function selection mode



Item 2Item 1

English



German

Spanish

Russian





Italian

Chinese

French

Hold down the button and press the button for 2 seconds.

Press the operation mode button. Press theTIMER MENU button. Press theTIMER ON/OFF button.

Dot display



TEMP.

MENU



PAR-21MAA



MONITOR/SET

BACK DAY

CLOCK

ON/OFF

OPERATION

ON/OFF

CHECK

CLEAR



FILTER



TEST







Function selection

Mode selection

Display mode setting

Japanese

















Item 3



OFF

no1

Operation lock setting is not used. (Initial setting value)



Operation lock setting is except On/Off button.



no2



ON

OFF



OFF



ON

OFF



OFF



CALL-



C



F



ON

OFF



ON

OFF



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.

Automatic filter elevation panel up/down operation mode

Not necessary to set this mode. Refer to OPERATION MANUAL of Optional Parts (Panel) for details on operation.

Fixed air flow direction mode

Not necessary to set this mode. Refer to OPERATION MANUAL of indoor unit for details on operation.

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 °C is used. (Initial setting value)



The temperature unit °F is used.

Room air temperature is displayed. (Initial setting value)



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.

77

13 EASY MAINTENANCE FUNCTION

L Reduces maintenance work drastically. L 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

(%10 hours) temperature () temperature ()

Number of ON/OFF Discharge



times (%10 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

Intake air



Heat exchanger







L Conventional inspection work

Outdoor unit

L

Remove the service panel.

Measure the discharge temperature.

L

Indoor unit

Measure the intake air temperature.

Measure the outside air temperature

L

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.

L 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. + Maintenance information can be viewed even if the air conditioner is stopped.

N Remote controller button information





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

L 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

MODE



]

FILTER

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.

[Display] Waiting for stabilization

78

Stabilized

After 10 to 20 minutes

L 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

MENU

[Display ]

button



Cumulative operation time

COMP ON x10 HOURS

Outdoor unit information

ON/OFF

[Display 

button

Heat exchanger

 

]

temperature

OUTDOOR UNIT H·EXC. TEMP

Indoor unit information

button

Indoor room

 

[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

Blinking

After approx. 10 seconds

(7) Data is displayed on the display (at ).

To check the data for each item, repeat steps (5) to (7).

(8) To cancel maintenance mode, press the

TEST

N 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

01

Remote

controller

[Twin] Refrigerant address=00

Outdoor

unit

Indoor unit

01

Remote

controller

Indoor unit

02

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 1remote controller. To check or set the refrigerant addresses.

Refrigerant address 00

Outdoor

unit

Indoor unit

01

Remote

controller

Refrigerant address 01

Outdoor

unit

Indoor unit

01

ON/OFF

Refrigerant address 02

Outdoor

unit

Indoor unit

01

button.

Refrigerant address 15

Outdoor

unit

Indoor unit

01

79

12-2.GUIDE FOR OPERATION CONDITION

Inspection item Result

Breaker Good Retightened

Terminal block Outdoor Unit Good Retightened

Loose con-

nection

(Insulation resistance) M

Power supply

Com-

pressor

(Voltage) V

 Accumulated operating time Time

 Number of ON/OFF times Times

 Current A



Refrigerant/heat exchanger temperature



Refrigerant/discharge temperature

 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

COOL  HEAT 

Cleaning required

Check Points

Enter the temperature differences between , ,  and  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?

(

 Discharge temperature) – ( Outdoor

heat exchanger temperature)

(

 Indoor intake air temperature) – (

Indoor heat exchanger temperature)

Is "D000" displayed stably on the remote

controller?

(

 Discharge temperature) – ( Indoor

heat exchanger temperature) ( Indoor heat exchanger temperature) –

(

 Indoor intake air temperature)

Stable Unstable



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 in-

spection is necessary.

Refrigerant amount is dropping.

Filter or indoor heat exchanger may be

clogged.

Judgment

Cool Heat

**1The above judgement is just guide based on Japanese standard

conditions.

It may be changed depending on the indoor and outdoor temperature. It may be judged as "Filter inspection" due to the outdoor temperature, even though it is not clogged.

Cool mode Heat mode



45

Indoor



40

Inspection C

35

30

25

Filter inspection

20

Normal

15

10

Inspection A

5

Indoor intake air temperature)— (



010 20304050607080

(

heat exchanger temperature)

Result

[ Discharge temperature] – [ Outdoor heat exchanger temperature)

Inspection B



45

40

35

30

25

20

15

10

Indoor heat exchanger temperature) —

Indoor intake air temperature)





(

[ Discharge temperature] – [ Indoor heat exchanger temperature)

Inspection C

Filter inspection

Normal

Inspection B

Inspection A

5

010 20304050607080



80

14

MONITORING THE OPERA TION DA T A BY 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

[ (The display (at

(3) Press the [TEMP] buttons (

[Screen]

(4) Press the [CLOCK] buttons (

(5) Press the

(The requested data will be displayed at  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 ).

button for 3 seconds to switch to [Maintenance monitor].



) when [Maintenance monitor] is activated.

) now allows you to set a request code No.)

and ) to select the desired refrigerant address.

and ) to set the desired request code No.

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.

81

button for 3 seconds to return to maintenance mode.

14-2. REQUEST CODE LIST

* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.

Request content

Request code

Operation state

0

Compressor-Operating current (rms)

1

Compressor-Accumulated operating time

2

Compressor-Number of operation times

3

Discharge temperature (TH4)

4

Outdoor unit - Liquid pipe 1 temperature (TH3)

5

Outdoor unit - Liquid pipe 2 temperature

6

Outdoor unit-2-phase pipe temperature (TH6)

7

8

Outdoor unit-Outside air temperature (TH7)

9

Outdoor unit-Heat sink temperature (TH8)

10

11

Discharge super heat (SHd)

12

Sub-cool (SC)

13

14

15

Compressor-Operating frequency

16

Compressor-Target operating frequency

17

Outdoor unit-Fan output step

18

Outdoor unit-Fan 1 speed

19

(Only for air conditioners with DC fan motor)

Outdoor unit-Fan 2 speed

20

(Only for air conditioners with DC fan motor)

21

LEV (A) opening

22

LEV (B) opening

23

24

Primary current

25

DC bus voltage

26

27

28

Number of connected indoor units

29

Indoor unit-Setting temperature

30

Indoor unit-Intake air temperature <Measured by thermostat>

31

Indoor unit-Intake air temperature (Unit No. 1)

32

Indoor unit-Intake air temperature (Unit No. 2)

33

Indoor unit-Intake air temperature (Unit No. 3)

34

Indoor unit-Intake air temperature (Unit No. 4)

35

36

Indoor unit - Liquid pipe temperature (Unit No. 1)

37

Indoor unit - Liquid pipe temperature (Unit No. 2)

38

Indoor unit - Liquid pipe temperature (Unit No. 3)

39

Indoor unit - Liquid pipe temperature (Unit No. 4)

40

41

Indoor unit-Cond./Eva. pipe temperature (Unit No. 1)

42

Indoor unit-Cond./Eva. pipe temperature (Unit No. 2)

43

Indoor unit-Cond./Eva. pipe temperature (Unit No. 3)

44

Indoor unit-Cond./Eva. pipe temperature (Unit No. 4)

45

46

47

Thermostat ON operating time

48

Test run elapsed time

49

Description

(Display range)

Refer to 14-2-1. Detail Contents in Request Code.

0 – 50

0 – 9999

3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255

0 – 130

0– 255

0– 10

0 – 9999

0– 500

0– 50

180 – 370

0– 4

17 – 30

8– 39

-39 – 88

0 – 999

0– 120

Unit Remarks

–

A

10 hours

100 times

   

 

Hz

Step

rpm

Pulses

A

V

Units

 



   

Minutes

"0" is displayed if the air conditioner is a single-fan type.

"0" is displayed if the target unit is not present.

is displayed if the target unit is not present.

"0"

is displayed if the target unit is not present.

"0"

Not possible to activate maintenance mode during the test run.

82

Request content

Request code

Indoor unit-Control state

50

Outdoor unit-Control state

51

Compressor-Frequency control state

52

Outdoor unit-Fan control state

53

Actuator output state

54

Error content (U9)

55

56

57

58

59

Signal transmission demand capacity

60

Contact demand capacity

61

External input state (silent mode, etc.)

62

63

64

65

66

67

68

69

Outdoor unit-Capacity setting display

70

Outdoor unit-Setting information

71

72

Outdoor unit-SW1 setting information

73

Outdoor unit-SW2 setting information

74

75

Outdoor unit-SW4 setting information

76

Outdoor unit-SW5 setting information

77

Outdoor unit-SW6 setting information

78

Outdoor unit-SW7 setting information

79

Outdoor unit-SW8 setting information

80

Outdoor unit-SW9 setting information

81

Outdoor unit-SW10 setting information

82

83

M-NET adapter connection (presence/absence)

84

85

86

87

88

89

Display of execution of replace/wash operation

Outdoor unit-Microcomputer version information

90

Outdoor unit-Microcomputer version information (sub No.)

91

92

93

94

95

96

97

98

99

Outdoor unit - Error postponement history 1 (latest)

100

Outdoor unit - Error postponement history 2 (previous)

101

Outdoor unit - Error postponement history 3 (last but one)

102

Description

(Display range)

Refer to 14-2-1.Detail Contents in Request Code.

0 – 255

Refer to 14-2-1.Detail Contents in Request Code.

"0000": Not connected "0001": Connected

"0000": Not washed "0001": Washed

"0501"

Auxiliary information (displayed after

version information)

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)

"A000"

Code

Unit Remarks

–

%

–

Ver

–

83

Request content

Request code

Error history 1 (latest)

103

Error history 2 (second to last)

104

Error history 3 (third to last)

105

Abnormal thermistor display

106

(TH3/TH6/TH7/TH8)

Operation mode at time of error

107

Compressor-Operating current at time of error

108

Compressor-Accumulated operating time at time of error

109

Compressor-Number of operation times at time of error

110

Discharge temperature at time of error

111

Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error

112

Outdoor unit - Liquid pipe 2 temperature at time of error

113

Outdoor unit-2-phase pipe temperature (TH6) at time of error

114

115

Outdoor unit-Outside air temperature (TH7) at time of error

116

Outdoor unit-Heat sink temperature (TH8) at time of error

117

Discharge super heat (SHd) at time of error

118

Sub-cool (SC) at time of error

119

Compressor-Operating frequency at time of error

120

Outdoor unit at time of error

121

• Fan output step

Outdoor unit at time of error

122

• Fan 1 speed (Only for air conditioners with DC fan)

Outdoor unit at time of error

123

• Fan 2 speed (Only for air conditioners with DC fan)

124

LEV (A) opening at time of error

125

LEV (B) opening at time of error

126

127

128

129

Thermostat ON time until operation stops due to error

130

131

Indoor - Liquid pipe temperature at time of error

132

Indoor-2-phase pipe temperature at time of error

133

Indoor at time of error

134

• Intake air temperature <Thermostat judge temperature>

135

136

137

138

139

140

~

146

147

148

149

Indoor-Actual intake air temperature

150

Indoor - Liquid pipe temperature

151

Indoor-condenser/evaporator pipe temperature

152

Description

(Display range)

Displays error history. (" - - " is displayed if no history is present.)

3

: TH3

6 : TH6

7 : TH7

8 : TH8

0 : No thermistor error

Displayed in the same way as request code "0".

0 − 50

0 − 9999

3 − 217

-40 − 90

-39 − 88

-40 − 200

0 − 255

0 − 130

0 − 255

0 − 10

0 − 9999

0 − 500

0 − 999

-39 − 88

Unit Remarks

Code

Sensor

number

Ð

A

10 hours

100 times

   

Hz

Step

rpm

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 condi-

tioner consists of two or more indoor units (twin, triple, quad).

Average value of all indoor units is displayed if the air condi-

tioner consists of two or more indoor units (twin, triple, quad).

84

Request content

Request code

153

Indoor-Fan operating time

154

(After filter is reset)

Indoor-Total operating time

155

(Fan motor ON time)

156

Indoor fan output value (Sj value)

157

Indoor fan output value

158

(Pulsation ON/OFF)

Indoor fan output value (duty value)

159

160

161

Indoor unit-Model setting information

162

Indoor unit-Capacity setting information

163

Indoor unit-SW3 information

164

Wireless pair No. (indoor control board side) setting

165

Indoor unit-SW5 information

166

167

~

189

Indoor unit-Microcomputer version information

190

Indoor unit-Microcomputer version information (sub No.)

191

192

~

764

Stable operation (Heat mode)

765

Stable operation (Cool mode)

766

Stable operation cancellation

767

Description

(Display range)

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

Auxiliary information (displayed after version information)

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".

Unit Remarks

1 hour

10 hours

For indoor fan phase control

–

For indoor fan pulsation control

–

For indoor DC brushless motor control

–

Ver

–

85

14-2-1. Detail Contents in Request Code





[Operation state] (Request code :"0")

Data display

C4

Relay output state

Operation mode

Display Operation mode

0STOP • FAN C COOL • DRY HHEAT d Defrost

[Indoor unit – Control state] (Request code :" 50 ")





Relay output state

Display

0 1 2 3 4 5 6 7 8

A

Power currently

supplied to compressor

ON ON

Example) Request code "004"

B: Refrigerant address C: Data display area D: Request code display area

Compressor Four-way valve Solenoid valve

–

Discharge temperature 69  Refrigerant address "00"

–

ON ON ON ON

–

ON ON

ON

–

ON

Data display

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

00

Frequency control state

Frequency control state 

Display Current limit control

0 No current limit 1 Primary current limit control is ON. 2 Secondary current limit control is ON.

Frequency control state 

Display





Discharge temperature

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

overheat prevention

Condensation temperature

overheat prevention

Anti-freeze

protection control

Heatsink temperature

overheat prevention

86

[Fan control state] (Request code :" 53 ")

Data display

00

Fan step correction value by heatsink temperature overheat prevention control

Fan step correction value by cool condensation temperature overheat prevention control

Display Correction value

- (minus) – 1 00 1 2

+1 +2

[Actuator output state] (Request code :"54")

Data display

00

Actuator output state 

Actuator output state 

Actuator output state 

Display SV1 Four-way valve Compressor

0 1

2 3

4 5

6 7

8 9

A b

C d

E F

ON

ON ON

Compressor is

warming up

ON ON

Actuator output state 

Display 52C SV2 SS

0 1

2 3 4 5 6 7

ON

ON ON

ON ON ON ON

[Error content (U9)] (Request code :"55")

Data display

00

Error content 

Error content 

Error content  : Detected

Display

0 1 2 3 4 5 6 7 8 9

A

b

C

d

E

F

Overvoltage Undervoltage L-phase

error error open error

Power synchronizing

signal error

Error content  : Detected

0 1 2 3

Converter Fo

error

PAM error

Display

87

[Contact demand capacity] (Request code :"61")

Data display

000

Setting content

[External input state] (Request code :"62")

Data display

000

Input state

Setting content

ON

Setting

ON

Display Setting value

0 1 50% 2 75% ON 3 100%

Input state : Input present

Display

0 1 2 3 4 5 6 7 8 9

A

b

C

d

E

F

0%

Contact demand Silent mode Spare 1 Spare 2

input input input input

SW7-1 SW7-2

[Outdoor unit -– Capacity setting display] (Request code : "70")

Data display

935 10 50 11 6 0 14 71 20 100 25 125 28 140 40 200 50 250

Capacity

[Outdoor unit – Setting information] (Request code :"71")

Data display

00

Setting information 

Setting information 

Setting information 

Display Defrost mode

0 Standard 1 For high humidity

Setting information 

Display

0 1 2 3

Single-/ Heat pump/

3-phase

Single-phase

3-phase

cooling only

Heat pump Cooling only Heat pump Cooling only

88

[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82

0: Swich OFF 1: Swich ON

SW1, SW2, SW6, SW7

123456

000000 0000 100000 0001 010000 0002 1 1 0 0 0 0 00 03 001000 0004 101000 0005 011000 0006 1 1 1 0 0 0 00 07 000100 0008 100100 0009 010100 000A 1 1 0 1 0 0 00 0b 001100 000C 1 0 1 1 0 0 00 0d 011100 000E 11 11 0 0 000F 000010 0010 100010 010010 11 0 010 001010 101010 011010 11 1 010 000110 100110 010110 11 0 11 0 001110 101110 011110 11 111 0 000001 100001 010001 11 0 001 001001 101001 011001 11 1 001 000101 100101 010101 11 0 101 001101 101101 011101 11 11 0 1 000011 100011 010011 11 0 011 001011 101011 011011 11 1 011 000111 100111 010111 11 0 11 1 001111 101111 011111 11 111 1

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

0: Swich OFF 1: Swich ON

SW5

1234

0000 0000 1000 0001 0100 0002 1 1 0 0 00 03 0010 0004 1010 0005 0110 0006 1 1 1 0 00 07 0001 0008 1001 0009 0101 000A 1 1 0 1 00 0b 0011 000C 1 0 1 1 00 0d 0111 000E 11 11 000F

0: Swich OFF 1: Swich ON

SW8

123

000 0000 100 0001 010 0002 11 0 0003 001 0004 101 0005 011 0006 11 1 0007

0: Swich OFF 1: Swich ON

SW4, SW9, SW10

12

0 0 00 00 1 0 00 01 0 1 00 02 1 1 00 03

Data display

89

[Indoor unit – Model setting information] (Request code :"162")

Data display

00

See the table on the right.

Display Model setting state Display Model setting state

00 PSA-RP•GA, PSH-PGAH 20 01 21 02

PEAD-RP•EA(2)/GA, PEHD-P•EAH22PCA-RP•GA(2), PCH-P•GAH, PLA-RP•BA, PLA-RP71/100/125BA2 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 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

PKA-RP•FAL(2), PKH-P•FALH

PCA-RP•KA

PKA-RP•HAL/KAL PEAD-RP•JA(L)

PLA-RP•AA2 PLA-RP100BA3, 140BA2

[Indoor unit – Capacity setting information] (Request code :"163")

Data display

00

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 35, 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

[Wireless pair No. (indoor control board side) setting] (Request code :"165")

Data display

00

See the table on the right.

Display Pair No. setting state

00 No. 0 01 No. 1 J41 disconnected 02 No. 2 J42 disconnected 03 No. 3 J41, J42 disconnected

90

15 DISASSEMBLY PROCEDURE

PUHZ-P100VHA2.UK PUHZ-P100VHA3.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<Heatsink>, high pressure switch, 4-way valve and bypass valve. Then remove a screw (4 × 8) from the valve bed to remove the lead wire.

Pull out the disconnected wire from the electrical parts box.

• Fan motor (CNF1)

• LEV (LEV-A)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• Thermistor <Heatsink> (CN3)

• High pressure switch (63H)

• 4-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.

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

Compressor (MC)

Cover panel (Front)

91

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 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

Lead wire of thermistor <Outdoor> (TH7)

Photo 6

Electrical parts box

Clamp

Sensor holder

92

Thermistor <Discharge> (TH4)

Thermistor <Outdoor pipe> (TH3)

OPERATING PROCEDURE

PHOTOS

7. Removing the 4-way valve (21S4), LEV coil (LEV(A))

(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 4-way valve]

(4) Remove the 4-way valve fixing screw (M4 × 6). (5) Remove the 4-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 LEV coil by sliding the coil upward. (5) Disconnect the connectors, LEV A (white), on the controller circuit board in the electrical parts box.

8. Removing the 4-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 screws (5 × 10) in the rear of the unit and then remove the right side panel. (6) Remove the 4-way valve. (See Photo 7.) (7) Recover refrigerant. (8) Remove the welded part of 4-way valve.

Note 1: Recover 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

Photo 8

LEV

4-way valve fixing screw

LEV coil (LEV A)

4-way valve

4

-way valve

(21S4)

4-way valve

9. Removing the LEV

(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 screws (5 × 10) in the rear of the unit and then remove the right side panel. (6) Remove the LEV. (See Photo 7.) (7) Recover refrigerant. (8) Remove the welded part of LEV.

Note 1: Recover 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 LEV, 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.

93

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 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) Pull out the lead wire of high pressure switch. (6) Recover refrigerant. (7) Remove the welded part of high pressure switch.

Note 1: Recover 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.) (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.

Photo 9

Lead wire of high pressure switch

High pressure switch (63H)

Photo 10

Reactor fixing screw

Reactor fixing screws

Reactor (DCL)

Electrical parts box

94

OPERATING PROCEDURE

PHOTOS

12. Removing the 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 stop valve fixing screws (5 × 16) and then remove the valve bed.

(7) Remove 3 right side panel fixing screws (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) Remove the terminal cover and then remove the lead wire

for compressor. (10) Remove the soundproof cover for compressor. (11) Recover refrigerant. (12) Remove the 3 points of the motor for compressor fixing nut using a spanner or a adjustable wrench. (13) Remove the welded pipe of motor for compressor inlet and outlet and then remove the compressor.

Note: Recover refrigerant without spreading it in the air.

Photo 11

Separator

Terminal cover

Inlet

Outlet

Accumulator

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 stop valve fixing screws (5 × 16) and then remove the valve bed. (7) Remove 3 right side panel fixing screws (5 × 10) in the rear of the unit and then remove the right side panel. (8) Recover refrigerant. (9) Remove welded pipes of accumulator inlet and outlet. (10) Remove 2 accumulator leg fixing screws (4 × 10).

Note: Recover refrigerant without spreading it in the air.

Separator

fixing screw

Accumulator leg fixing screws

Soundproof cover for compressor

95

PUHZ-P125VHA2.UK PUHZ-P140VHA2.UK PUHZ-P125VHA21.UK PUHZ-P140VHA21.UK PUHZ-P125VHA3.UK PUHZ-P140VHA3.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, LEV, thermistor <Outdoor pipe>, thermistor <Discharge>, thermistor <Outdoor 2-phase pipe>, thermistor <Outdoor>, high pressure switch, 4-way valve coil. 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, CNF2)

• LEV (LEV-A)

• Thermistor <Outdoor pipe> (TH3)

• Thermistor <Discharge> (TH4)

• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)

• High pressure switch (63H)

• 4-way valve (21S4)

• Bypass valve (SV2)

• Clankcase heater (SV1/CH) (5) Remove the terminal cover and disconnect the compressor lead wire. (6) Remove an electrical parts box fixing screw (4 × 10) and

Photo 3

Screw

Compressor (MC)

Fan motor fixing screws

Controller circuit board (C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block (TB1)

Valve bed

Terminal cover

Cover panel (Front)

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.

Cover panel fixing screws

96

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) (See Photo 7.)

and thermistor <Discharge> (TH4) from the sensor holder.

Photo 5

Photo 6

Thermistor <Discharge> (TH4)

Lead wire of thermistor <Outdoor> (TH7)

Electrical parts box

Clamp

Sensor holder

97

Compressor (MC)

OPERATING PROCEDURE

PHOTOS

7. Removing the 4-way valve coil (21S4), and LEV coil (LEV(A))

(1) Remove the service panel. (See Figure 1.) (2) Remove the top panel. (See Figure 1.)

[Removing the 4-way valve coil]

(3) Remove 4-way valve solenoid coil fixing screw (M4 × 6). (4) Remove the 4-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 LEV coil]

(3) Remove the LEV 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 4-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 screws (5 × 10) in the rear of the unit and then remove the right side panel. (5) Remove the 4-way valve. (6) Recover refrigerant. (7) Remove the welded part of 4-way valve.

Note 1: Recover 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 4-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

Lead wire of high pressure switch

High pressure switch

Bypass valve coil (SV)

Bypass valve coil fixing screw

LEV

Thermistor <Outdoor pipe> (TH3)

4-way valve coil (21S4)

4-way valve coil fixing screw

LEV coil (LEV A)

4-way valve

9. Removing LEV

(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 screws (5 × 10) in the rear of the unit and then remove the right side panel. (5) Remove the LEV. (6) Recover refrigerant. (7) Remove the welded part of LEV.

Note 1: Recover 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 LEV, 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 is not oxidized.

98

OPERATING PROCEDURE

10. Removing bypass valve coil (SV) and bypass valve

(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) Remove the bypass valve coil fixing screw (M4 × 6). (5) Remove the bypass valve by sliding the coil upward. (6) Disconnect the connector SV2 (blue) on the controller circuit board in the electrical parts box. (7) Recover refrigerant. (8) Remove the welded part of bypass valve.

Note 1: Recover 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)

(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) Recover refrigerant. (6) Remove the welded part of high pressure switch.

Photo 8

Lead wire of high pressure switch

High pressure switch

PHOTOS

LEV

LEV coil (LEV A)

Note 1: Recover 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.) <Removing the reactor> (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.

Bypass valve coil (SV)

Photo 9

Bypass valve coil fixing screw

Reactor fixing screw

4-way valve coil fixing screw

4-way valve coil (21S4)

4-way valve

Reactor (DCL)

99

Reactor fixing screws

Electrical parts box

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 screws (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) Recover refrigerant. (10) Remove the 3 points of the motor for compressor fixing nut using a spanner or an adjustable wrench. (11) Remove the welded pipe of motor for compressor inlet and outlet and then remove the compressor.

Note: Recover refrigerant without spreading it in the air.

Photo 10

Terminal cover

Compressor (MC)

Compressor

fixing nut

Accumulator leg fixing screws

Accumulator

Accumulator leg

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 screws (5 × 10) in the rear of the unit and then remove the right side panel. (8) Recover refrigerant. (9) Remove welded pipes of accumulator inlet and outlet. (10) Remove 2 accumulator leg fixing screws (4 × 10).

Note: Recover refrigerant without spreading it in the air.

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CCopyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Mar. 2009 No.OCH415 REVISED EDITION-B PDF 6 Distributed in Feb. 2008 No.OCH415 REVISED EDITION-A PDF 7 Distributed in Apr. 2007 No.OCH415 PDF 7 Made in Japan

New publication, effective Mar. 2009 Specifications subject to change without notice

Mitsubishi PUHZ-P100VHA2.UK, PUHZ-P125VHA2.UK, PUHZ-P125VHA21.UK, PUHZ-P140VHA2.UK, PUHZ-P140VHA21.UK Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual