PUHZ-P-VHA2 SM

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PUHZ-P-VHA2 SM | Manualzz

OCH415A-1.qxp 08.2.21 8:17 AM Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

February 2008

No.OCH415

REVISED EDITION-A

SERVICE MANUAL

R410A

Outdoor unit

[model names] [Service Ref.]

PUHZ-P100VHA2

PUHZ-P125VHA2

PUHZ-P140VHA2

PUHZ-P100VHA2.UK

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2.UK

PUHZ-P140VHA2

1

.UK

Revision:

• PUHZ-P125/140VHA2

1

.UK

are added in REVISED

EDITION-A.

• Some descriptions have been modified.

Please void OCH415.

Note:

This manual describes only service data of the outdoor units.

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

CONTENTS

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

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

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

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

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

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

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

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

9. WIRING SPECIFICATIONS ··························14

10. REFRIGERANT SYSTEM DIAGRAM ··············19

11. TROUBLESHOOTING···································21

12. FUNCTION SETTING····································70

13. EASY MAINTENANCE FUNCTION ··············77

14. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER············80

15. DISASSEMBLY PROCEDURE ·····················90

PARTS CATALOG (OCB415)

PUHZ-P100VHA2.UK

OCH415A-1.qxp 08.2.21 8:17 AM Page 2

1

TECHNICAL CHANGES

PUHZ-P125VHA2

PUHZ-P140VHA2

PUHZ-P125VHA2

PUHZ-P140VHA2

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

1

1

2

REFERENCE MANUAL

INDOOR UNIT’S SERVICE MANUAL

Model name

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

Service Ref.

PLA-RP50/60/71/100/125/140BA.UK

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

PCA-RP50GA2

PCA-RP71/125HA

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

PCA-RP50GA2

PCA-RP71/125HA

PKA-RP50GAL

PKA-RP60/71/100FAL

PKA-RP50FAL2

PSA-RP71/100/125/140GA

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

PEAD-RP100EA2

PEAD-RP60/71/100GA

PKA-RP50GAL

PKA-RP60/71/100FAL

PKA-RP50FAL2

PSA-RP71/100/125/140GA

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

PEAD-RP100EA2.UK

PEAD-RP60/71/100GA.UK

Service

Manual No.

OCH412

OCB412

OC328

OC329

OC330

OC331

OC332

HWE05210

HWE05060

2

OCH415A-1.qxp 08.2.21 8:17 AM Page 3

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.

Do not use refrigerant other than R410A.

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

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.

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.

Gauge manifold

Charge hose

Gas leak detector

Torque wrench

Tools for R410A

Flare tool

Size adjustment gauge

Vacuum pump adaptor

Electronic refrigerant charging scale

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

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.

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.

Keep the tools with care.

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

Do not use a charging cylinder.

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

Ventilate the room if refrigerant leaks during 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

OCH415A-1.qxp 08.2.21 8:17 AM Page 4

Unit

Gravimeter

[3] Service tools

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

No.

Tool name

1

Gauge manifold

2

Charge hose

Specifications

·Only for R410A

·Use the existing fitting specifications. (UNF1/2)

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

·Only for R410A

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

3

Electronic scale

4

Gas leak detector

5

Adaptor for reverse flow check

6

Refrigerant charge base

7

Refrigerant cylinder

·Use the detector for R134a, R407C or R410A.

·Attach on vacuum pump.

·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8

Refrigerant recovery equipment

4

OCH415A-1.qxp 08.2.21 8:17 AM Page 5

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.

1

Thickness 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 (mm)

6.35

9.52

12.70

15.88

19.05

R410A

0.8

0.8

0.8

1.0

Thickness (mm)

R22

0.8

0.8

0.8

1.0

1.0

2

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

R410A

9.1

13.2

16.6

19.7

R22

9.0

13.0

16.2

19.4

23.3

(mm) Flare nut 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 B

Dimension B

R410A R22

17.0

22.0

26.0

29.0

w

17.0

22.0

24.0

27.0

36.0

(mm) w

36.0mm for

indoor unit

of RP100,

125 and 140

3

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

Tools and materials

Gauge manifold

Charge hose

Gas leak detector

Refrigerant recovery equipment

Refrigerant cylinder

Applied oil

Safety charger

Use

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

R410A tools

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

Can R22 tools be used?

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

Prevent gas from blowing out when detaching charge hose

Tool exclusive for R410A

Vacuum drying and air purge

Flaring work of piping

Bend the pipes

Cut the pipes

Weld the pipes

Refrigerant charge

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

Check the degree of vacuum. (Vacuum valve prevents back flow of oil and refrigerant to thermistor vacuum gauge)

Refrigerant charge

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)

: 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.

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)

5

OCH415A-1.qxp 08.2.21 8:17 AM Page 6

4 FEATURES

PUHZ-P125VHA2.UK

PUHZ-P140VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2

1

.UK

PUHZ-P100VHA2.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.

6

OCH415A-1.qxp 08.2.21 8:17 AM Page 7

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

A

A kW

Crankcase heater

Heat exchanger

Fan Fan(drive) o

No.

Fan motor output

Airflow

Defrost method

Noise level

Dimensions

Weight

Refrigerant

Charge

Oil (Model)

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

W

Cooling

Heating

W

D

H kW

K /min(CFM) dB dB mm(in.) mm(in.) mm(in.) kg(lbs)

Liquid

Gas

Indoor side

Outdoor side kg(lbs)

L mm(in.) mm(in.)

Height difference

Piping length

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) o

No.

Fan motor output

Airflow

Defrost method

Noise level

Dimensions

Cooling

Heating

W

D

H

Weight

Refrigerant

Charge

Oil (Model)

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

Liquid

Gas

Indoor side

K

A

A kW

W kW

/min(CFM) dB dB mm(in.) mm(in.) mm(in.) kg(lbs) kg(lbs)

L mm(in.) mm(in.)

Outdoor side

Height difference

Piping length

Cooling

12.26

PUHZ-P100VHA2.UK

Single, 50Hz, 230V

28

Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

TNB220FLHMT

2.9

Line start

HP switch

Discharge thermo

Plate fin coil

Propeller fan o

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

Heating

12.62

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

Cooling

17.37

1

.UK

PUHZ-P140VHA2.UK

PUHZ-P140VHA2

1

.UK

Heating Heating

Single 50Hz, 230V

16.74

Cooling

22.48

21.31

28

29.5

Munsell 5Y 7/1

Linear Expansion Valve

Hermetic

TNB306FPGM

3.4

3.9

Line start

HP switch

Discharge thermo

30

Plate fin coil

Propeller fan o

2

0.060+0.060

100(3,530)

Reverse cycle

51

55

52

56

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

7

OCH415A-1.qxp 08.2.21 8:17 AM Page 8

6 DATA

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

Service Ref.

PUHZ-P100VHA2.UK

10m

2.9

Piping length (one way)

20m

30m

40m

3.0

3.6

4.2

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2.UK

PUHZ-P140VHA2

1

.UK

4.3

4.3

4.4

4.4

4.5

4.5

5.1

5.1

50m

4.8

5.7

5.7

Initial charged

3.0

4.5

4.5

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

6-2. COMPRESSOR TECHNICAL DATA

Unit

(at 20

°

C)

PUHZ-P100VHA2.UK

PUHZ-P125,140VHA2.UK

PUHZ-P125,140VHA2

1

.UK

Compressor model

Winding

Resistance

(

"

)

U-V

U-W

W-V

TNB220FLHMT

0.88

0.88

0.88

TNB306FPGM

0.53

0.53

0.53

8

OCH415A-1.qxp 08.2.21 8:17 AM Page 9

6-3. NOISE CRITERION CURVES

MICROPHONE

1m

UNIT

1.5m

GROUND

PUHZ-P100VHA2.UK

MODE

COOLING

HEATING

SPL(dB)

50

54

LINE

90

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250

NC-20

500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

1

.UK

90

80

MODE

COOLING

HEATING

SPL(dB)

51

55

LINE

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250

NC-20

500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

PUHZ-P140VHA2.UK

PUHZ-P140VHA2

1

.UK

90

80

MODE

COOLING

HEATING

SPL(dB)

52

56

LINE

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250

NC-20

500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

9

OCH415A-1.qxp 08.2.21 8:17 AM Page 10

6-4. STANDARD OPERATION DATA

Representative matching

Mode

Capacity

Input

Indoor unit

Phase , Hz

Volts

Input

Amperes

W kW

V kW

A

PLA-RP100BA

Cooling

9,400

3.12

Heating

11,200

3.28

PLA-RP100BA

1 , 50

230

0.14

0.94

0.13

0.87

Outdoor unit

PUHZ-P100VHA2

PLA-RP125BA

Cooling

12,300

4.09

Heating

14,000

4.11

PLA-RP125BA

1 , 50

230

0.15

1.00

0.14

0.94

PUHZ-P125VHA2

Phase , Hz

Volts

V

Current

Discharge pressure

Suction pressure

Discharge temperature

Condensing temperature

Suction temperature

Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

D.B.

W.B.

D.B.

D.B.

W.B.

m

°

C

°

C

°

C

°

C

°

C

A

MPa

( O f/ F )

MPa

( O f/ F )

°

C

°

C

°

C

SHF

BF

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

0.21

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

The unit of pressure has been changed to MPa based on international SI system.

The conversion factor is : 1(MPa)=10.2(kgf/

f

)

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

0.18

1 , 50

230

16.74

2.56

(26.1)

0.68

(6.9)

64.5

43.4

1.3

5

20

15

44.2

7

6

PLA-RP140BA

Cooling

13,600

5.21

Heating

16,000

4.98

PLA-RP140BA

1 , 50

0.16

1.07

230

0.15

1.00

PUHZ-P140VHA2

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

0.14

1 , 50

230

21.31

2.75

(28.1)

0.64

(6.5)

70.8

47.2

1.0

5

20

15

48.0

7

6

10

OCH415A-1.qxp 08.2.21 8:17 AM Page 11

7 OUTLINES AND DIMENSIONS

OUTDOOR UNIT

PUHZ-P100VHA2.UK

(19) 370

417

,,

,,

,,,

56

45

,,

,,

,,

,, ,,,

,,,,

,,

53

28

670

1 443

1 447 w w

71

Unit : mm(inch)

330 30

943

473

23

219 81

Over100

30

Less than

500

Over

Over 100mm

O ve r 1

0 m m

O ve r 1

0 m m

Over 500mm

11

{

92

55

63 73 23

27

{

92

55

63

63 73

2792

73

23

23

27

92

{

OCH415A-1.qxp 08.2.21 8:17 AM Page 12

PUHZ-P125VHA2.UK

PUHZ-P140VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2

1

.UK

(19) 370

417

45

56

28

53

330 30

1076

1 443

1 447 w w

71

Unit : mm(inch)

635

1350

371

23

219 81

150

Over

30

Less than

500

Over

Over 150mm Over 10mm

Over 10mm

Over 1000mm

12

55

{

92

63 73 23

27

92

{

63

55

2792 23

73

63 73 23

27

92

OCH415A-1.qxp 08.2.21 8:17 AM Page 13

8 WIRING DIAGRAM

PUHZ-P100VHA2.UK

PUHZ-P125VHA2

1

.UK

TH3

TH4

TH6

TH7

TH8

LEV-A

DCL

ACTM

CB

SYMBOL

TB1

MC

MF1,MF2

21S4

SV

CH

63H

NAME

Terminal Block<Power Supply, Indoor/Outdoor >

Motor Compressor

Fan Motors

Solenoid Valve (Four-Way Valve)

Solenoid Valve (Bypass Valve)

Crankcase Heater

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

PUHZ-P125VHA2.UK

PUHZ-P140VHA2

1

.UK

SYMBOL

P.B.

TABU/V/W

TABS/T

TABP1/P2/P

TABN1/N2/N

DS2,3

IPM

N.F.

C.B.

F1~F4

SW1

SW4

SW5

SW6

SW7

NAME

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>

Switch<Forced Defrost, Defect History Record

Reset, Refrigerant Address>

Switch<Test Operation>

Switch<Function Switch>

Switch<Model Select>

Switch<Function Setup>

PUHZ-P140VHA2.UK

SYMBOL

SW8

SW9

SWP

CN31

Switch

NAME

Switch

Switch<Pump Down>

Connector<Emergency Operation>

LED1,LED2 Light Emitting Diodes

<Operation Inspection Indicators>

CNM

CNMNT

Connector<A-Control Service Inspection Kit>

Connector<Connected to Optional M-NET Adapter Board>

CNVMNT

CNDM

Connector<Connected to Optional M-NET Adapter Board>

Connector< Connected for Option (Contact Input)>

X51,X52,X54,X55 Relay

MF1

MS

3~

C.B.

1 7

CNF1

(WHT)

MF2

MS

3~ w

2

1 7

CNF2

(WHT)

3

2

CNS

(WHT)

3 1

1

CNDC

(PNK)

F2

F1

TRANS

CNAC

(WHT)

1 2

3 4

TH7 TH6 TH3 TH4 t

° t

° t

° t

°

1

TH7/6

(RED)

4 1 2 2

TH3

(WHT)

1

TH4

(WHT)

63H

1

CN2

(WHT)

1

3

63H

(YLW)

7

F3

F4

7

LEV-A

M

1

LEV-A

(WHT)

6

3 5

1 3

CNVMNT

(WHT)

1

CNMNT

(WHT)

5

1

2

CN4

(WHT)

1 2

CNM

(WHT)

14

CN52C

(RED)

1 2

2 w

1 w

1

21S4

(GRN)

3 1

21S4

3 1

SV2

(BLU)

3 1

SV1/CH

(GRY)

3 1 SS

(WHT)

SV w

2

CH

2

CN31

1

3

1

5

When M-NET adaptor is connected

5

5

SW11

2

1

SW1

1

LED2

LED3

LED4

SW12

M-NET SUBSTRATE

CND

(WHT)

3 1

A B S

TB7

M-NET

3

N.F.

1

2

2

4

7

TH8 t

°

2

2

CB

+

P.B.

6

1

1

CNAF

(WHT)

CN2

(WHT)

7

1

2

CN3

(WHT)

1

2

1

2

CN5

(RED)

CN4

(WHT)

TABN

TABP

IPM

+

+

CNDC

(PNK)

1

2

3

U

DS3

+

TABT

~

~

DS2 TABS

~

+ ~

TABP1

3

1

(WHT) CNAC1

3

1

E2

1

2

2

U

V

MS

3~

W

MC

U

U

EI

4

DCL

+

L1 L2

1

P

6

N1

N2

Io

ACTM

L N

POWER SUPPLY

~/N 230V 50Hz

S1 S2

INDOOR

UNIT

S3

CY1

CY2

TB1 w

1 MODEL SELECT

MODEL SW5-6 w

3

100V

ON

OFF

1 2 3 4 5 6

SW6

ON

OFF

1 2 3 4 5 6 7 8

125V

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6 7 8

140V

ON

OFF

ON

OFF

1 2 3 4 5 6 1 2 3 4 5 6 7 8 w

2 P125,P140 only w

3 SW5-1 to 5 : Function Switch

13

OCH415A-1.qxp 08.2.21 8:17 AM Page 14

9 WIRING SPECIFICATIONS

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

Outdoor unit model

Outdoor unit power supply

P100, 125V

~/N (single), 50 Hz,

230 V

P140V

~/N (single), 50 Hz,

230 V

Outdoor unit input capacity

Main switch (Breaker)

Outdoor unit power supply

Outdoor unit power supply earth

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

Remote controller-Indoor unit

Outdoor unit L-N (single)

Outdoor unit L1-N, L2-N, L3-N (3 phase)

Indoor unit-Outdoor unit S1-S2

Indoor unit-Outdoor unit S2-S3

Remote controller-Indoor unit

*1

*2

*2

*3

*4

*4

*4

*4

32 A

2 o

Min. 4

1 o

Min. 4

3 o

1.5 (Polar)

1 o

Min. 1.5

2 o

0.3 (Non-polar)

AC 230 V

AC 230 V

DC 24 V

DC 12 V

40 A

2 o

Min. 6

1 o

Min. 6

3 o

1.5 (Polar)

1 o

Min. 1.5

2 o

0.3 (Non-polar)

AC 230 V

AC 230 V

DC 24 V

DC 12 V

*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.

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

3 poles isolator

S1

A-Control

Outdoor Unit

S2

S3

S1

S2

A-Control

Indoor Unit

S3

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

Unit power supply

B C

B

Earth leakage breaker

C

wiring circuit breaker or

isolating switch

Outdoor unit

L

N

Indoor/outdoor unit connection cable

S1

S2

S3

Indoor unit

1

2

S1

S2

S3

Remote controller

Synchronized twin and triple system Electrical wiring

• Synchronized twin

Unit power supply

B C

B

Earth leakage breaker

C

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

Remote controller

Indoor unit

1

2

S1

S2

S3

• Synchronized triple

Unit power supply

B C

B

Earth leakage breaker

C

wiring circuit breaker or

isolating switch

Outdoor unit

L

N

Indoor/outdoor connection cable

S1

S2

S3

Indoor unit

1

2

S1

S2

S3

Remote controller

Indoor unit

Indoor unit

1

2

1

2

S1

S2

S3

S1

S2

S3

14

OCH415A-1.qxp 08.2.21 8:17 AM Page 15

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

<For models without heater>

* The optional indoor power supply terminal kit is required.

A B C

D

L

N

J

S1

S2

S3

E

B

C

F

S1

S2

S3

1

2

G

L

N

H

A

Outdoor unit power supply

B

Earth leakage breaker

C

Wiring circuit breaker or isolating switch

D

Outdoor unit

E

Indoor unit/outdoor unit connecting cords

F

Remote controller

G

Indoor unit

H

Option

J

Indoor unit power supply

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

Simultaneous twin/triple system

<For models without heater>

* The optional indoor power supply terminal kits are required.

A B C

S1

S2

S3

D

L

N

J

E

B C

F

S1

S2

S3

1

2

G

L

N

G

L

N

S1

S2

S3

1

2

H

S1

S2

S3

1

2

G

L

N

A

B

Outdoor unit power supply

Earth leakage breaker

C

D

Wiring circuit breaker or isolating switch

Outdoor unit

E

F

Indoor unit/outdoor unit connecting cords

Remote controller

G

H

Indoor unit

Option

J

Indoor unit power supply

* 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.

Electric heater

(For models with heater)

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

Indoor power supply terminal kit (option)

Indoor unit electrical box connector connection change

Label affixed near each wiring diagram for the indoor and outdoor units

Outdoor unit DIP switch settings (when using separate indoor unit/outdoor unit power supplies only)

Indoor unit specifications

Required

Required

Required

ON

OFF 1 2

3

(SW8)

Set the SW8-3 to ON.

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

L

N

;

S1

S2

S3

Indoor unit control board

Indoor unit power supplied from outdoor unit

(when shipped from factory)

Electric heater

(For models with heater)

L

N

S1

S2

S3

;

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

Connectors

Indoor unit control board

Separate indoor unit/outdoor unit power supplies

Indoor unit model

Indoor unit power supply

Indoor unit input capacity

Main switch (Breaker)

Indoor unit power supply

Indoor unit power supply earth

Indoor unit-Outdoor unit

Indoor unit-Outdoor unit earth

Remote controller-Indoor unit

Indoor unit L-N

Indoor unit-Outdoor unit S1-S2

Indoor unit-Outdoor unit S2-S3

Remote controller-Indoor unit

*1

*2

*3

*4

*4

*4

*4

RP35~140

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

16 A

2 o

Min. 1.5

1 o

Min. 1.5

2 o

Min. 0.3

2 o

0.3 (Non-polar)

AC 230 V

DC24 V

DC12 V

*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

OCH415A-1.qxp 08.2.21 8:17 AM Page 16

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

Wire size

(mm

2

)

Number of wires

Polarity

Round

2.5

3

Clockwise : S1-S2-S3

L(m)

5

50

1

Flat

2.5

3

Not applicable

(Because center wire has no cover finish)

Not applicable

2

Flat

1.5

4

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

45

3

Round

2.5

4

Clockwise : S1-S2-S3-Open

Connect S1 and S3 to the opposite angle

60

4

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

2

.

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.

Wire No.

o

Size (

E

)

Outdoor power supply

Max. 45m Max. 50m

Indoor unit-Outdoor unit

Max. 80m

Indoor unit-Outdoor unit

3

o

1.5 (polar) 3

o

2.5 (polar) 3

o

2.5 (polar) and S3 separated

Indoor unit-Outdoor unit earth

1

o

Min. 1.5

1

o

Min. 2.5

1

o

Min. 2.5

w

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

Indoor/Outdoor separate power supply

Wire No.

o

Size (

E

)

Max. 120m

2

o

Min. 0.3

Indoor unit-Outdoor unit earth

w

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

(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

16

OCH415A-1.qxp 08.2.21 8:17 AM Page 17

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 1.25mm

2 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

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

A-control remote controller

A-control remote controller

A-control remote controller

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

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

“Ed” error will appear on the LED display of outdoor unit.

“0403” error will appear on the central-control remote controller.

Bad example (Multi spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET type outdoor unit

M-NET type outdoor unit

M-NET transmission wire

Good example 1 (Single spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET type outdoor unit

M-NET type outdoor unit

M-NET transmission wire

Good example 2 (Single spot grounding of shield wire)

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET type outdoor unit

M-NET type outdoor unit

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 ground wire and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among grounding spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire do not form 1 circuit.

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

17

OCH415A-1.qxp 08.2.21 8:17 AM Page 18

M-NET wiring

(1) Use 2-core x 1.25mm

2 shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to A terminal and the other to B. Peel the shield wire,

M-NET terminal block

Ground 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

Transmission wire

Shield part

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

<Setting example> M-NET Address No.

1 2

~

50

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.

Switng setting

SW11 ones digit

90

12

345

90

12

345

90

12

345

(Factory setting: all addresses are set to “0”.)

SW12 tens digit

90

12

345

90

12

345

90

12

345

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 2 3 4 5 6

0

ON

OFF

1 2 3 4 5 6

1

ON

OFF

1 2 3 4 5 6

2

ON

OFF

1 2 3 4 5 6

3

ON

OFF

1 2 3 4 5 6

4

ON

OFF

1 2 3 4 5 6

5

ON

OFF

1 2 3 4 5 6

6

ON

OFF

1 2 3 4 5 6

7

ON

OFF

1 2 3 4 5 6

8

ON

OFF

1 2 3 4 5 6

9

ON

OFF

1 2 3 4 5 6

10

ON

OFF

1 2 3 4 5 6

11

ON

OFF

1 2 3 4 5 6

12

ON

OFF

1 2 3 4 5 6

13

ON

OFF

1 2 3 4 5 6

14

ON

OFF

1 2 3 4 5 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

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 01

M-NET address 03

Power supply unit for transmission wire

TB5

A-control remote controller

A-control remote controller w

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

Group A

Refrigerant address 00

M-NET address 04

A-control remote controller

Group B

System controller

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

Power supply unit for transmission wire

A-control remote controller

TB5

A-control remote controller 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

OCH415A-1.qxp 08.2.21 8:17 AM Page 19

10 REFRIGERANT SYSTEM DIAGRAM

Unit : mm(inch)

PUHZ-P100VHA2.UK

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant GAS pipe

15.88mm( [ 5/8)

Stop valve

(#50)

Strainer

Service port

(check)

4-way valve

Muffler

Accumulator

Strainer

(#40)

Refrigerant LIQUID pipe

9.52mm( [ 3/8)

Stop valve

(with service port)

Service port

(check)

Compressor

(TH4)

High pressure protect switch

Outdoor heat exchanger

Thermistor

(TH6)

Thermistor

(#100)

Strainer

(#100)

Strainer

Linear expansion valve

Thermistor

(TH3)

Distributor

PUHZ-P125VHA2.UK PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2.UK PUHZ-P140VHA2

1

.UK

Bypass valve

Stop valve 4-way valve

Refrigerant GAS pipe

15.88mm( [ 5/8)

(#50)

Strainer

Service port

(check)

Service port

(check)

High pressure protect switch

Thermistor

(TH6)

Muffler

Thermistor

(TH4)

Refrigerant LIQUID pipe

9.52mm( [ 3/8)

Strainer

(#40)

Accumulator

Compressor

Strainer

(#100)

Strainer

(#100)

Linear expansion valve

Stop valve

(with service port)

Distributor

Thermistor (TH3)

Capillary tube

( [ 4.0

o[

3.0

o

-L200) o

2

19

OCH415A-1.qxp 08.2.21 8:17 AM Page 20

1. Refrigerant recovery (pump down)

Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.

1

Turn on the power supply (circuit breaker).

w

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

TRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.

2

After 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.

w

Set 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.

3

Because 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.

w

In 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.

w

If 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.

4

Turn 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.

1

Set the operation mode (cooling/heating) using SW4-2.

2

Turn on SW4-1 to start test run with the operation mode set by SW4-2.

3

Turn off SW4-1 to finish the test run.

ON

<SW4>

C D

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.

OFF

1 2

A B

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.

A

Stop

C

Operation

B

Cooling

D

Heating

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.)

20

OCH415A-1.qxp 08.2.21 8:17 AM Page 21

11 TROUBLESHOOTING

11-1. TROUBLESHOOTING

<Error code display by self-diagnosis and actions to be taken for service (summary)>

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

Error code Actions to be taken for service (summary)

Displayed

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

The trouble is reoccurring.

Not displayed

Logged

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

1

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.

2

Reset error code logs and restart the unit after finishing

service.

3

There is no abnormality concerning of parts such as

electrical component, controller board, remote controller

and etc.

The trouble is not reoccurring.

Not logged

1

Re-check the abnormal symptom.

2

Conduct trouble shooting and ascertain the cause

of the trouble according to “11-5. Troubleshooting

by inferior phenomena”.

3

Continue to operate unit for the time being if the cause

is not ascertained.

4

There is no abnormality concerning of parts such as

electrical component, controller board, remote controller

and etc.

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 leakage, 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.

w

Don’t 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.)

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OCH415A-1.qxp 08.2.21 8:17 AM Page 22

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

Displays the remaining test run time.

B

C

A

[TEST] button

Operating procedures

1. Turn on the main power supply.

button.

5. Check the outdoor unit fan for

correct running.

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. w

1

The TEST RUN appears on the screen.

Cooling mode: Check if cool air blows and water is drained.

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.

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

7. Register the contact number.

Pipe (liquid) temperature

• 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.

w

1 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 w

1 written above.

Remote Controller Display

Remote controller displays “PLEASE

WAIT”, and cannot be operated.

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

Symptoms in test run mode

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>

No display appears even when remote controller operation switch is turned on.

(Operation lamp does not light up.)

After “startup” is displayed, green(twice) and red(once) blink alternately. <EA. Eb>

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

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

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

Cause

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

minutes during system startup. (Normal)

• Incorrect connection of outdoor terminal block (L

1

, L

2

, L

3 and

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) 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

P2

P4

P5

P6

P8

P9

Fb

Contents of trouble

Abnormality of room temperature thermistor

Abnormality of pipe temperature thermistor/Liquid

Abnormality of drain sensor/Float switch connector open

Drain overflow protection is working.

Freezing/overheating protection is working.

Abnormality of pipe temperature

Abnormality of pipe temperature thermistor/Cond./Eva

Abnormality of indoor controller board

LCD

U1~UP

F3~F9

E0~E5

E6~EF

----

FFFF

PA

Contents of trouble

Malfunction outdoor unit

Malfunction outdoor unit

Remote controller transmitting error

Indoor/outdoor unit communication error

No error history

No applied unit

Forced compressor stop(due to water leakage abnormality)

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

LED1 (microcomputer power supply)

LED2 (remote controller)

Lits when power is supplied.

Lits when power is supplied for wired remote controller.

The indoor unit should be connected to the outdoor unit with address “0” setting.

LED3

(indoor/outdoor communication)

Flash when indoor and outdoor unit are communicating.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 23

TEST RUN

ON/OFF

TEMP

7

3

,

4

FAN

AUTO STOP

MODE VANE

AUTO START

CHECK LOUVER

TEST RUN h min

5

6

2

SET RESET CLOCK

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.

TEST RUN

2

Press the button twice continuously.

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

TEST RUN and current operation mode are displayed.

3

MODE

Press the ( ) button to activate mode, then check whether cool air is blown out from the unit.

4

MODE

Press the ( ) button to activate mode, then check whether warm air is blown out from the unit.

FAN

5

Press the button and check whether strong air is blown out from the unit.

6

VANE

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.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 24

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.

F

1

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

2

In the case of group control, for which one remote controller controls multiple refrigerant systems, the refrigerant address and error code of the unit that first experienced trouble (i.e., the unit that transmitted the error code) will be displayed.

3

To clear the error code, press the

ON/OFF

button.

E

G

(Alternating Display)

C D

Error code (2 or 4 digits) 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.

1

Switch to self-diagnosis mode.

H

Press the

CHECK

button twice within 3 seconds. The display content will change as shown below.

2

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

F

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

or [00]

and [15].

Unit number or refrigerant address to be diagnosed

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

3

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)

<When there is no error code history>

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

<When there is no corresponding unit>

I

A

B

H

4

Reset the error history.

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

3

).

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OCH415A-1.qxp 08.2.21 8:17 AM Page 25

D

Press the

ON/OFF

button twice within 3 seconds. The self-diagnosis address or refrigerant address will flash.

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.

5

Cancel self-diagnosis.

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

H

Press the

CHECK

button twice within 3 seconds.

Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start of self-diagnosis.

6

Press the

ON/OFF

button.

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

11-3-3. Remote Controller Diagnosis

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

1

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

If the correct voltage (DC12 V) is not supplied to the remote controller, the indicator will not light.

If this occurs, check the remote controller's wiring and the indoor unit.

2

Switch to the remote controller self-diagnosis mode.

H

Press the

CHECK

button for 5 seconds or more. The display content will change as shown below.

Power on indicator

A

Press the

FILTER

button to start self-diagnosis.

3

Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

[When the remote controller malfunctions]

(Error display 1) "NG" flashes.

The remote controller's transmitting-receiving circuit is defective.

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

The remote controller must be replaced with a new one.

[Where the remote controller is not defective, but cannot be operated.]

(Error display 2) [E3], [6833] or [6832] flashes.

Transmission is not possible.

(Error display 3)

"ERC" and the number of data errors are displayed.

Data error has occurred.

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.

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.

When the number of data errors is "02":

Transmission data from remote controller

Transmission data on transmission path

4

To cancel remote controller diagnosis

H

Press the

CHECK

button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will flash. After approximately 30 seconds, the state in effect before the diagnosis will be restored.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 26

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

<In case of trouble during operation>

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

<

Malfunction-diagnosis method at maintenance service>

[Procedure]

1. Press the CHECK button twice.

CHECK display

CHECK

Refrigerant address display

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

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

ON/OFF button

ON/OFF

TEMP

Temperature button

2. Press the temperature buttons.

• 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.)

FAN AUTO STOP

CHECK button

MODE

TEST RUN

VANE

AUTO START

CHECK LOUVER

SET

RESET

CLOCK h min

HOUR button

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

• If an air conditioner error occurs, the indoor unit's sensor emits an intermittent buzzer sound, the operation light flashes, and the error code is output.

(It takes 3 seconds at most for error code to appear.)

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

• The check mode is cancelled.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 27

• Refer to the following tables for details on the check codes.

[Output pattern A]

Beeper sounds Beep

Beep Beep Beep Beep Beep Beep

OPERATION

INDICATOR lamp blink pattern

1 st 2 nd 3 rd n th 1 st 2 nd · · · Repeated

Self-check starts

(Start signal received)

Off

Approx. 2.5 sec.

On

0.5 sec.

On

0.5 sec.

On

0.5 sec.

On

0.5 sec.

code in the following table (i.e., n=5 for “P5”)

Off On

Approx. 2.5 sec.

0.5 sec.

Number of blinks/beeps in pattern indicates the check

On

0.5 sec.

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

[Output pattern B]

Beeper sounds Beep

OPERATION

INDICATOR lamp blink pattern

Off

Self-check starts

(Start signal received)

Approx. 2.5 sec.

On

Approx. 3 sec.

Beep Beep Beep

1 st

2 nd

3 rd

On

0.5 sec.

On On

0.5 sec.

0.5 sec.

Beep n th

On

0.5 sec.

Off

Approx. 2.5 sec.

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

On

Approx. 3 sec.

Beep Beep

1 st 2 nd · · · Repeated

On

0.5 sec.

On

0.5 sec.

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

[Output pattern A] Errors detected by indoor unit

Wireless remote controller Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks

(Number of times)

Check code

1 P1

P2

2

3

4

5

P9

E6,E7

P4

P5

PA

Symptom

Intake sensor error

Pipe (TH2) sensor error

Pipe (TH5) sensor error

Indoor/outdoor unit communication error

Drain sensor error/Float switch connector open

Drain pump error

Forced compressor stop (Due to water leakage abnormality)

10

11

12

8

9

6

7

P6

EE

P8

E4, E5

Fb

E0, E3

Freezing/Overheating protection operation

Communication error between indoor and outdoor units

Pipe temperature error

Remote controller signal receiving error

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

Remote controller transmission error

[Output pattern B]

E1, E2 Remote controller control board error

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

Wireless remote controller Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks

(Number of times)

Check code

Symptom

1

2

3

4

5

E9

UP

U3,U4

UF

U2

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

6

7

8

9

10

11

U1,Ud

U5

U8

U6

U7

U9,UH

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

12

13

14

Others

Other errors

*1 If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records.

*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.

Remark

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

Remark

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

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OCH415A-1.qxp 08.2.21 8:17 AM Page 28

11-4. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E.

Error Code

Abnormal points and detection method

Case

1

No voltage is supplied to terminal block(TB1) of outdoor unit.

a) Power supply breaker is turned off.

b) Contact failure or disconnection 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)

None

4

Disconnection of reactor (DCL)

Judgment and action

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 power circuit board

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)

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.

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

b) Replace outdoor noise filter circuit board.

Refer to 11-9.

6

Defective outdoor power circuit board

7

Defective outdoor controller circuit board

6

Replace outdoor power circuit board.

7

Replace outdoor controller circuit board (When items above are checked but the units cannot be repaired).

F5

(5201)

63H connector open

Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply.

63H: High-pressure switch

1

Disconnection or contact failure of 63H connector on outdoor controller circuit board

2

Disconnection or contact failure of 63H

3

63H is working due to defective parts.

4

Defective outdoor controller circuit board

1

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.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 29

Error Code

Abnormal points and detection method

EA

(6844)

Case

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”.

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

Check disconnection or looseness or polarity of indoor/outdoor unit connecting wire of indoor and outdoor units.

2

Check diameter and length of indoor/outdoor unit connecting wire.

Total wiring length: 80m

(including wiring connecting each indoor unit and between indoor and outdoor unit)

Also check if the connection order of flat cable is S1, S2, S3.

3

4

~

Judgment and action

Check the number of indoor units that are connected to one outdoor unit. (If EA is detected.)

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.

Eb

(6845)

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.

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.

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.

EC

(6846)

Start-up time over

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

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.

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OCH415A-1.qxp 08.2.21 8:17 AM Page 30

<Abnormalities detected while unit is operating>

Error Code

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

U1

(1302)

63H: High-pressure switch

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

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 : .

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.

5

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 displayed when the power is turned on again.

When U3 is displayed, refer to “Judgement and action” for U3.

Check linear expansion valve.

Refer to 11-6.

U2

(1102)

(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 : .

<Condition B>

• 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.)

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OCH415A-2.qxp 08.2.21 8:15 AM Page 31

Error Code

U3

(5104)

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.)

U4

(TH3:5105)

(TH6:5107)

(TH7:5106)

(TH8:5110)

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.

W

Check 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

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

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

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.

W

Emergency operation is available in case of abnormalities of TH3, TH6 and TH7.

Refer to 11-8.

U5

(4230)

U6

(4250)

Thermistors

Symbol Name

TH3

TH6

TH7

Thermistor <Outdoor pipe>

Thermistor <Outdoor 2-phase pipe>

Thermistor <Outdoor>

TH8

Thermistor <Heatsink>

Temperature of heatsink

Abnormal if heatsink thermistor(TH8) detects temperature indicated below.

P100-140VHA2·············79 :

Open detection

– 40 : or below

– 40 : or below

– 40 : or below

– 27 : or below

Short detection

90 : or above

90 : or above

90 : or above

102 : or above

1

The outdoor fan motor is locked.

2

Failure of outdoor fan motor

3

4

5

Airflow path is clogged.

Rise of ambient temperature

Defective thermistor

6

Defective input circuit of outdoor power circuit board

7

Failure of outdoor fan drive circuit

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.

6

(Thermistor/TH8: Refer to 11-6.)

(SW2 on A-Control Service Tool: Refer to 11-

10.)

Replace outdoor power circuit board.

7

Replace outdoor controller circuit board.

Power module

Check abnormality by driving power module in case overcurrent is detected.

(UF or UP error condition)

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

1

Open stop valve.

2

Check facility of power supply.

3

Correct the wiring (U·V·W phase) to compressor. Refer to 11-9 (Outdoor power circuit board).

4

Check compressor referring to 11-6.

5

Replace outdoor power circuit board.

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OCH415A-2.qxp 08.2.21 8:15 AM Page 32

Error Code

U8

(4400)

Abnormal points and detection method

Case

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;

1

Failure in the operation of the DC fan motor

2

Failure in the outdoor circuit controller board

• 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.

U9

(4220)

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.)

Judgment and action

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 voltage to 200V

Increase of DC bus voltage to 400V

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

1

Decrease of power supply voltage

2

Disconnection of compressor wiring

3

Defective noise filter circuit board

4

Disconnection or loose connection of CN52C

5

Defective ACT module

6

Defective ACT module drive circuit of outdoor power circuit board

7

Disconnection or loose connection 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

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.

Ud

(1504)

UF

(4100)

UH

(5300)

UL

(1300)

Overheat protection

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

1

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

2

Defective outdoor pipe thermistor (TH3)

3

Defective outdoor controller board

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.

Compressor overcurrent interruption

(When compressor locked)

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

1

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 board

1

Open stop valve.

2

Check facility of power supply.

3

Correct the wiring (U·V·W phase) to compressor.

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

4

Check compressor.

Refer to 11-6.

5

Replace outdoor power circuit board.

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.

1

Disconnection of compressor wiring

2

Defective circuit of current sensor on outdoor power circuit board

1

2

Correct the wiring (U·V·W phase) to compressor. Refer to 11-9 (Outdoor power circuit board).

Replace outdoor power circuit board.

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 :

1

Stop valve of outdoor unit is closed during operation.

2

Leakage or shortage of refrigerant

3

Malfunction of linear expansion valve

1

Check stop valve.

2

Check intake super heat.

Check leakage of refrigerant.

Charge additional refrigerant.

3

Check linear expansion valve.

Refer to 11-6.

Thermistor TH3:Outdoor liquid pipe temperature

TH5:Indoor cond./eva. Temperature

TH7:Outdoor temperature

32

OCH415A-2.qxp 08.2.21 8:15 AM Page 33

Error Code

Abnormal points and detection method

Compressor overcurrent interruption

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

UP

(4210)

Case

1

Stop valve of outdoor unit is closed.

2

Decrease of power supply voltage

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 outdoor controller board

7

Defective compressor

1

Open stop valve.

2

Check facility of power supply.

3

Judgment and action

Correct the wiring (U·V·W phase) to compressor. Refer to 11-9 (Outdoor power circuit board).

4

Check indoor/outdoor fan.

5

Solve short cycle.

6

Replace outdoor controller circuit board.

7

Check compressor.

Refer to 11-6.

W

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

E0 or

E4

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

1

Abnormal if main or sub remote controller 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 receiving 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 controllers have no problem.

Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

b) When “RC NG” is displayed, replace remote controller.

c)When “RC E3”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 normally from the nonvolatile memory of the remote controller control board.

(Error code: E1)

1

Defective remote controller

2

Abnormal if the clock function of remote controller cannot be operated normally.

(Error code: E2)

1

Replace remote controller.

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OCH415A-2.qxp 08.2.21 8:15 AM Page 34

Error Code

E3 or

E5

Remote controller transmission error(E3)/signal receiving error(E5)

1

Abnormal points and detection method

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 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: E5)

Case

1

2 remote controllers are set as

“main.”

(In case of 2 remote controllers)

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 receiving circuit of indoor controller board

6

Noise has entered into transmission wire of remote controller.

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 controllers 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 displayed, noise may be causing abnormality.

E8

(6840)

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.

1

Contact failure of indoor/outdoor 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.

1

Check disconnection or looseness of indoor/

2

~ outdoor unit connecting wire of indoor or outdoor units.

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)

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.

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/ outdoor unit connecting wire.

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.

Non defined error code

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

1

Noise has entered transmission wire of remote controller.

2

Noise has entered indoor/ outdoor unit connecting wire.

3

Outdoor unit is not a series of power-inverter.

4

Model name of remote controller is PAR-S25A.

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.

Ed

(0403)

Serial communication error

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

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

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.

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.

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OCH415A-2.qxp 08.2.21 8:15 AM Page 35

Error Code

P8

Abnormal points and detection method

Case

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.

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.

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))

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

1 2 3 4 5 6

ON

Temperature display of indoor condenser/ evaporator pipe Indoor 1

1 2 3 4 5 6

ON

OFF OFF

Temperature display of indoor liquid pipe

Indoor 2

1 2 3 4 5 6

ON

OFF

Temperature display of indoor condenser/ evaporator pipe Indoor 2

1 2 3 4 5 6

ON

OFF

A-Control Service Tool SW2 setting

23

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

<M-NET communication error>

Error Code

A0

(6600)

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.

A2

(6602)

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.

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

Case

1

There are 2 or more same address of controller of outdoor unit, indoor unit, FRESH

MASTER, or LOSSNAY.

2

Noise has entered into transmission 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.

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

Judgment and action

Check transmission wave form or noise on transmission wire.

A3

(6603)

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.

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.

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.

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OCH415A-2.qxp 08.2.21 8:15 AM Page 36

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

1

Data of transmission processor 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.

Judgment and action

Turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSS-

NAY 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).

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 ··(12m)

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····1.25mm

2 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-generated controller

Always try the followings when the error

“A7” occurs.

1

Turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSS-

NAY 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-generated address.

3

Check disconnection or looseness of abnormality-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 different refrigerant system (two or more outdoor units), judge with

6

.

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).

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

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 LOSS-

NAY are connected to, or the system that is equipped with group setting of different refrigerant system.

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

If there was no trouble with

1

-

6 above, replace the controller board of displayed address or attribute.

If the unit does not return normally, multi-controller board of outdoor unit may be defective

(repeater circuit).

Replace multi-controller board one by one to check if the unit returns normally.

Continued to the next page.

36

OCH415A-2.qxp 08.2.21 8:15 AM Page 37

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

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

Judgment and action

Same as mentioned in “A7” of the previous page

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).

1

During sequential operation of indoor unit and FRESH MAS-

TER 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

A7

(6607)

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

If the power supply of LOSS-

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

2

During sequential operation of indoor unit and LOSSNAY of other refrigerant system, if indoor unit transmits to LOSS-

NAY while outdoor unit power supply of same refrigerant system with LOSSNAY is turned off or within 2 minutes of restart, abnormality is detected.

3

Contact failure of transmission wire of indoor unit of LOSS-

NAY

4

Disconnection of transmission connector (CN2M) of indoor unit

5

Defective transmitting receiving 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 LOSS-

NAY are changed after sequential operation of

FRESH MASTER and LOSS-

NAY by remote controller.

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OCH415A-2.qxp 08.2.21 8:15 AM Page 38

Error Code 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).

A8

(6608)

Case

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 ··(12m)

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····1.25mm

2 or more

4

Accidental malfunction of abnormality-generated controller

Judgment and action

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 LOSS-

NAY 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.

11-5. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

1. Remote controller display does not work.

Factor

1

DC12V is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

2

DC12~15V is supplied to remote controller, however, no display is indicated.

“PLEASE WAIT” is not displayed.

“PLEASE WAIT” is displayed.

Countermeasure

1

Check 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.

2

Check 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.

1

At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2

Communication error between the remote controller and indoor unit

3

Communication error between the indoor and outdoor unit

4

Outdoor unit protection device connector is open.

1

Normal operation

2

Self-diagnosis of remote controller

3

”PLEASE WAIT” is displayed for 6 minutes 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.

4

Check 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.

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

1

After cancelling to select function from the remote controller, the remote controller operation switch will be not accepted for approx. 30 seconds.

1

Normal operation

38

OCH415A-2.qxp 08.2.21 8:15 AM Page 39

Phenomena

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

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

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

(The air does not cool well.)

Factor

1

The pair number settings of the wireless remote controller and indoor controller board are mismatched.

1

Countermeasure

Check the pair number settings.

1

No operation for 2 minutes at most after the power supply ON

2

Local remote controller operation is prohibited.

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

1

2

Normal operation

Normal operation

• Local remote controller operation is prohibited by centralised controller etc. since it is connected to

MELANS.

3

Refer to Phenomena No.2 on previous page.

3

Check Phenomena No.2 on previous page.

1

Refrigerant shortage

2

Filter clogging

3

Heat exchanger clogging

4

Air duct short cycle

1

If refrigerant leaks, discharging temperature rises and LEV opening increases.

Inspect leakage by checking the tem- perature and opening.

Check pipe connections for gas leakage.

2

Open suction grill and check the filter.

Clean the filter by removing dirt or dust on it.

3

If the filter is clogged, indoor pipe tem- perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.

Clean the heat exchanger.

4

Remove the shield.

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

1

Linear expansion valve fault

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

2

Refrigerant shortage

3

Lack of insulation for refrigerant piping

4

Filter clogging

5

Heat exchanger clogging

6

Air duct short cycle

7

Bypass circuit of outdoor unit fault

1

Discharging temperature and indoor heat exchanger temperature does not rise.

Inspect the failure by checking discharging pressure.

Replace linear expansion valve.

2

If refrigerant leaks, discharging tempera ture rises and LEV opening increases.

Inspect leakage by checking the tem- perature and opening.

Check pipe connections for gas leakage.

3

Check the insulation.

4

Open suction grill and check the filter.

Clean the filter by removing dirt or dust on it.

5

If the filter is clogged, indoor pipe tem- perature rises and discharging pressure increases. Check if heat exchanger is clogged by inspecting discharging pressure.

Clean the heat exchanger.

6

Remove the shield.

7

Check refrigerant system during operation.

8.

1

For 3 minutes after temperature adjuster turns off, the compressor

12

Normal operation

(For protection of compressor) will not start operating even if temperature adjuster is turned on.

2

For 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.)

12

Normal operation

39

OCH415A-2.qxp 08.2.21 8:15 AM Page 40

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

Diagnosis flow Cause

Inspection method and troubleshooting

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

6 minutes or more

How long is “PLEASE WAIT” kept being displayed on the remote controller?

2 to 6 minutes

2 minutes or less

Check the LED display of the outdoor controller circuit board.

Are any error codes displayed on the remote controller?

YES

NO

Are any error codes displayed on the LED?

YES

NO

• “PLEASE WAIT”

will be displayed

during the start-up

diagnosis after turning

on the main power.

• Normal.

The start-up diagnosis will

be over in around 2 minutes.

• Mis-wiring of indoor/

outdoor connecting

wire

• Breaking of indoor/

outdoor connecting

wire (S3)

• Defective indoor

controller board

• Defective outdoor

controller circuit

board

• Refer to “Self-diagnosis

action table” in order to

solve the trouble.

• In case of communication

errors, the display of

remote controller may not

match the LED display of

the outdoor unit.

• Defective indoor

controller board

• Defective remote

controller

40

OCH415A-2.qxp 08.2.21 8:15 AM Page 41

Symptoms: Nothing is displayed on the remote controller

Diagnosis flow Cause

1

LED display of the indoor controller board

LED1 :

LED2 :

LED3 :

Inspection method and troubleshooting

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(L

3

) and

N on the terminal block (TB1) of the outdoor power circuit board.

AC 198V to AC 264V?

NO

• Troubles concerning

power supply

• Check the power wiring

to the outdoor unit.

• Check the breaker.

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.

Check the voltage of indoor controller board (CN2D).

AC 198V to AC 264V?

NO

YES

• Bad wiring of the

outdoor controller board

• The fuses on the outdoor

controller circuit board are

blown.

• Check the wiring of the

outdoor unit.

• Check if the wiring is bad.

Check if the fuses are blown.

The fuses on the outdoor

controller circuit board will

be blown when the indoor

/outdoor connecting wire

short-circuits.

DC 12V to DC 16V?

NO

Check the voltage of the unit after removing the indoor power board

(CN2S).

DC 12V to DC 16V?

NO

YES

YES

• Bad wiring of the

outdoor controller board

• The fuses on the outdoor

controller circuit board are

blown.

• 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.

• Defective indoor

controller board

• Replace the indoor

controller board.

• Miswiring, breaking

or poor connection of

indoor/outdoor

connecting wire

• Check if there is miswiring

or breaking of wire.

• Defective indoor

power board

• Replace the indoor

power board.

41

OCH415A-2.qxp 08.2.21 8:15 AM Page 42

Symptoms: Nothing is displayed on the remote controller

2

LED display of the indoor controller board

LED1 :

LED2 :

LED3 : or

Diagnosis flow Cause

Inspection method and troubleshooting

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.

NO

AC 198V to AC 264V?

YES

Check the status of the indoor controller board LED3 display.

Not lighting.

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

Blinking.

YES

Are there looseness or disconnection of the indoor/ outdoor connecting wire?

NO

• Breaking or poor contact

of the indoor/outdoor

connecting wire

• Fix the breaking or poor

contact of the indoor/outdoor

connecting wire.

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

Is the refrigerant address “0”?

NO

YES

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

• Normal

Only the unit which

has the refrigerant

address “0” supplies

power to the remote

controller.

• Set the refrigerant

address to “0”. In case of

the multiple grouping

system, recheck the

refrigerant address again.

Is anything displayed?

Not displayed.

Displayed.

Is “EA” or “Eb” displayed?

YES

NO

• Defective outdoor

controller circuit

board

Is “E8” displayed?

NO

Can the unit be restarted?

YES

• Defective outdoor

controller circuit

board

• Replace the outdoor

controller circuit board.

• Replace the outdoor

controller circuit board.

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

DC 17V to DC 28V?

NO

YES

Can all the indoor unit be operated?

YES

NO

• Defective indoor

controller board

• Replace the indoor controller

board of the indoor unit which

doesn’t operate.

• Influence of

electromagnetic noise

• Not abnormal.

There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

• Defective outdoor

power circuit board

• Replace the outdoor

power circuit board.

• Defective indoor

power board

• Replace the indoor

power board.

42

OCH415A-2.qxp 08.2.21 8:15 AM Page 43

Symptoms: Nothing is displayed on the remote controller

3

Diagnosis flow Cause

LED display of the indoor controller board

LED1 :

LED2 : or

LED3 : —

Inspection method and troubleshooting

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

DC 10V to DC 16V?

YES

NO

Check the status of the LED2.

Lighting

Blinking

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

Check the status of the LED2.

Lighting

Blinking

• Defective

remote controller

• Replace the

remote controller.

• Breaking or poor

contact of the remote

controller wire

• 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.

• The remote controller

wire short-circuits

• Check if the remote

controller wire is

short-circuited.

• Defective indoor

controller board

• Replace the indoor

controller board.

43

OCH415A-2.qxp 08.2.21 8:15 AM Page 44

• Before repair

Frequent calling from customers

not operate at all.

Phone Calls From Customers

Unit does

1

The operating display of remote

1

Check if power is supplied to air conditioner.

controller does not come on.

Nothing appears on the display unless power is supplied.

How to Respond

2

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

2

Wait around 3 minutes to restart unit.

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

3

Error code appears and blinks

3

Error code will be displayed if any protection on the display of remote devices of the air conditioner are actuated.

controller.

What is error code?

Note

Refer to “SELF-DIAGNOSIS

ACTION TABLE”.

Check if servicing is

required for the error.

Remote controller

1

“PLEASE WAIT” is displayed

on the screen.

1

Wait around 2 minutes.

An automatic startup test will be conducted for

2 minutes when power is supplied to the air conditioner. “PLEASE WAIT” will be kept being

displayed while that time.

2

“FILTER” is displayed on the

screen.

2

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

Clean the air filters. Press the FILTER button on

the remote controller twice to clear “FILTER” from

the display.

See the operation manual that came with the

product for how to clean the filters.

Display time of “FILTER” depends on the model.

Long life filter: 2500 hrs.

Regular filter: 100 hrs.

3

“STANDBY” is displayed on the

screen.

3

This is displayed when the unit starts HEAT

operation, when the thermostat puts the

compressor in operation mode, or when the

outdoor unit ends DEFROST operation and

returns to HEAT operation.

The display will automatically disappear around

10 minutes later.

While “STANDBY” is displayed on the remote

controller, the airflow amount will be restricted

because the indoor unit’s heat exchanger is not

fully heated up. In addition to that, the up/down

vane will be automatically set to horizontal blow

in order to prevent cold air from directly blowing

out to human body. The up/down vane will return

to the setting specified by the remote controller

when “STANDBY” is released.

4

“DEFROSTING” is displayed on

4

The outdoor unit gets frosted when the outside

the unit.) “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.

44

OCH415A-2.qxp 08.2.21 8:15 AM Page 45

Phone Calls From Customers

The room cannot be cooled or heated sufficiently.

How to Respondm

1

Check the set temperature of remote controller.

The outdoor unit cannot be operated if the set

temperature is not appropriate.

The outdoor unit operates in the following modes.

COOL: When the set temperature is lower

than the room temperature.

HEAT: When the set temperature is higher

than the room temperature.

2

Check if filters are not dirty and clogged. If filters

are clogged, the airflow amount will be reduced

and the unit capacity will be lowered. See the

instruction manual that came with the product for

how to clean the filters.

3

Check there is enough space around the air

conditioner.

If there are any obstacles in the air intake or air

outlet of indoor/outdoor units, they block the

airflow direction so that the unit capacity will be

lowered.

Sound comes out

1

An gas escaping sound is heard

sometimes.

1

This is not a malfunction.

This is the sound which is heard when the flow of from the air conditioner.

2

A cracking sound is heard

sometimes.

refrigerant in the air conditioner is switched.

2

This is not a malfunction.

This is the sound which is heard when internal

parts of units expand or contract when the

temperature changes.

3

A buzzing sound is heard

sometimes.

3

This is not a malfunction.

This is the sound which is heard when the outdoor

unit starts operating.

4

A ticking sound is heard from

the outdoor unit sometimes.

4

This is not a malfunction.

This is the sound which is heard when the blower

of the outdoor unit is controlling the airflow amount

in order to keep the optimum operating condition.

Note

5

A sound, similar to water

flowing, is heard from the unit.

Something is wrong with the blower…..

1

The fan speed doesn’t match

the setting of the remote

controller during DRY

operation.(No air comes out

sometimes during DRY

operation.)

5

This is not a malfunction.

This is the sound which is heard when the

refrigerant is flowing inside the indoor unit.

1

This is not a malfunction. During the DRY

operation, the blower’s ON/OFF is controlled by

the microcomputer to prevent overcooling and to

ensure efficient dehumidification. The fan speed

cannot be set by the remote controller during DRY

operation.

2

The fan speed doesn’t match

the setting of the remote

controller in HEAT operation.

2

This is not a malfunction. The up/down vane will be

unit from blowing cold air, the fan speed is horizontal blow in these

gradually increased from zero to the set speed, cases listed up on the left

in proportion to the temperature rise of the (

1

~

3

). After a while, the

discharged air.

2) When the room temperature reaches the set

temperature and the outdoor unit stops,

the unit starts the LOW AIR operation.

up/down vane will be automatically moved according to the setting of the remote controller.

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.

45

OCH415A-2.qxp 08.2.21 8:15 AM Page 46

Something is wrong with the

Phone Calls From Customers blower…..

3

Air blows out for a while after

HEAT operation is stopped.

How to Respond Note

3

This is not a malfunction.

The blower is operating just for cooling down the

However, this control is also applied to the models which

heated-up air conditioner. This will be done within has no electric heater.

one minute.

This control is conducted only when the HEAT

operation is stopped with the electric heater ON.

Something is wrong with the airflow direction….

1

The airflow direction is changed

1

If the up/down vane is set to downward in COOL

during COOL operation.

operation, it will be automatically set to horizontal

blow by the microcomputer in order to prevent

water from dropping down.

“1 Hr.” will be displayed on the remote controller if

the up/down vane is set to downward with the fan

speed set to be less than “LOW”.

2

The airflow direction is changed

2

In HEAT operation, the up/down vane is

during HEAT operation.

automatically controlled according to the

(The airflow direction cannot be

temperature of the indoor unit’s heat exchanger.

set by remote controller.)

In the following cases written below, the up/down

vane will be set to horizontal blow, and the setting

“STANDBY” will be displayed on the remote controller in case of

1

and

2

.

“DEFROSTING” will be

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 displayed on the screen in case of

3

.

to operate.

3) During DEFROST operation

The airflow direction will be back to the setting of

remote controller when the above situations are

released.

3

The airflow direction doesn’t

change.

(Up/down vane, left/right louver)

3

1) Check if the vane is set to a fixed position.

(Check if the vane motor connector is removed.)

2) Check if the air conditioner has a function for

switching the air direction.

3) If the air conditioner doesn’t have that function, “NOT

AVAILABLE” will be displayed on the remote controller

when “AIR DIRECTION” or “LOUVER” button is pressed.

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

1

Check if you set ON/OFF timer.

The air conditioner starts operating at the time

designated if ON timer has been set before.

2

Check if any operations are ordered by distant

control system or the central remote controller.

While “CENTRALLY CONTROLLED INDICATOR”

is displayed on the remote controller, the air

conditioner is under the control of external directive.

3

Check if power is recovered from power failure

(black out).

The units will automatically start operating when

power is recovered after power failure (black out)

occurs. This function is called “power failure automatic recovery ”.

There might be a case that

“CENTRALLY CONTROLLED

INDICATOR” will not be displayed.

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

1

Check if you set ON/OFF timer.

The air conditioner stops operating at the time

designated if OFF timer has been set before.

2

Check if any operations are ordered by distant

control system or the central remote controller.

While “CENTRALLY CONTROLLED INDICATOR” is

displayed on the remote controller, the air conditioner is

under the control of external directive.

There might be a case that

“CENTRALLY

CONTROLLED INDICATOR” will not be displayed.

46

OCH415A-2.qxp 08.2.21 8:15 AM Page 47

Phone Calls From Customers

A white mist is expelled from the indoor unit.

How to Respond

This is not a malfunction.

This may occur when the operation gets started in the room of high humidity.

Water or moisture is expelled from the outdoor unit.

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.

The display of wireless remote controller gets dim

Batteries are being exhausted. Replace them and or doesn’t come on.

press the reset button of remote controller.

The indoor unit doesn’t receive a signal from remote controller at a long distance.

Note

47

OCH415A-2.qxp 08.2.21 8:15 AM Page 48

11-6. HOW TO CHECK THE PARTS

PUHZ-P100VHA2.UK

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2

1

.UK

PUHZ-P140VHA2.UK

Parts name Check points

Thermistor (TH3)

<Outdoor pipe>

Thermistor (TH4)

<Discharge>

Thermistor (TH6)

<Outdoor 2-phase pipe>

Thermistor (TH7)

<Outdoor>

Thermistor (TH8)

<Heatsink>

Disconnect the connector then measure the resistance with a tester.

(At the ambient temperature 10 : ~30 : )

TH4

TH3

TH6

TH7

TH8

Normal

160k

4.3k

39k

"

"

"

~410k

~9.6k

~105k

"

"

"

Abnormal

Open or short

Fan motor(MF1,MF2) Refer to next page.

Solenoid valve coil

<Four-way valve>

(21S4)

Measure the resistance between the terminals with a tester.

(At the ambient temperature 20 : )

Normal

P100, P125/140VHA2

1

1500

±

150 "

P125/P140VHA2

1435

±

150 "

Motor for compressor

(MC)

U

Measure the resistance between the terminals with a tester.

(Winding temperature 20 : )

Normal

V

W

P100

0.88

"

P125,P140

0.53

"

Linear expansion valve

(LEV-A)

M

Gray

Orange

Red

Yellow

Black

1

2

3

4

5

6

Disconnect the connector then measure the resistance with a tester.

(Winding temperature 20 : )

Gray - Black

Normal

Gray - Red

46

±

3 "

Gray - Yellow

Gray - Orange

Solenoid valve coil

<Bypass valve>

(SV)

For P125, 140

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

Abnormal

Open or short

Abnormal

Open or short

48

OCH415A-2.qxp 08.2.21 8:15 AM Page 49

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

1 Notes

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

· Do not pull out the connector (CNF1, 2) for the motor with the power supply on.

(It causes trouble of the outdoor controller circuit

board and fan motor.)

2 Self check

Symptom : The outdoor fan cannot turn around.

Fuse check

Check the fuse (F5) on outdoor controller board.

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

Did the fuse blow?

No

Wiring contact check

Contact of fan motor connector (CNF1, 2)

Yes

Is there no contact failure?

No

Recover wiring.

Yes

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

Measure the voltage in the outdoor controller circuit board.

TEST POINT

1

: V

DC

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

DC

DC250~330V

TEST POINT

2

: V

CC

(between 5 (+) and 4 (-) of the fan connector): V

CC

DC15V

Is the voltage normal?

No

Replace outdoor controller board.

Yes

Check the operation.

NG

Replace the fan motor.

OK

END

Replace the fan motor.

Yes

Check the operation of fan.

NG

Replace outdoor controller board.

OK

END

49

OCH415A-2.qxp 08.2.21 8:15 AM Page 50

11-7. HOW TO CHECK THE COMPONENTS

<Thermistor feature chart>

Low temperature thermistors

• Thermistor <Outdoor pipe> (TH3)

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

• Thermistor <Outdoor> (TH7)

Thermistor R0 = 15k ' ± 3%

B constant = 3480 ± 2%

1

R t

=15exp{3480( 273+t

1

273 )}

0 : 15k '

10

:

9.6k

'

30

40

:

:

4.3k

3.0k

'

'

20 : 6.3k

'

25 : 5.2k

'

Medium temperature thermistor

• Thermistor <Heatsink> (TH8)

Thermistor R50 = 17k ' ± 2%

B constant = 4150 ± 3%

1

R t

=17exp{4150( 273+t

1

323)}

0 :

25 :

50 :

70 :

90

:

180k

50k

'

'

17k '

8k '

4k

'

High temperature thermistor

• Thermistor <Discharge> (TH4)

Thermistor R120 = 7.465k

' ± 2%

B constant = 4057 ± 2%

1

R t

=7.465exp{4057( 273+t

1

393)}

20

:

250k

'

30 : 160k '

40 : 104k '

50 : 70k '

60 : 48k '

70

:

80 :

110 :

34k

9.8k

'

24k '

90 : 17.5k

'

100 : 13.0k

'

'

50

50

40

30

20

10

0

-20 -10 0 10 20 30 40 50

Temperature ( : )

200

150

100

50

400

300

500

0

25 50 75

Temperature ( : )

100 125

200

100

0

25

50 75

Temperature ( : )

100 120

OCH415A-2.qxp 08.2.21 8:15 AM Page 51

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

LEV

Gray 1

Drive circuit

3

6

M

1

2

5

4

[ 4

Orange 3

[ 3

Red 4

[ 2

Yellow

5

[ 1 Black 6

[ 4

[ 3

[ 2

[ 1

Connector LEV-A

<Output pulse signal and the valve operation>

Output

Output

(Phase)

1 2 3 4

5 6 7 8

Opening a valve : 8

7

6

5

4

3

2

1

8

Closing a valve : 1

2

3

4

5

6

7

8

1

[

1

[ 2

[ 3

[ 4

ON ON OFF OFF OFF OFF OFF ON

OFF ON ON ON

OFF OFF OFF OFF

OFF OFF OFF ON ON ON OFF OFF

OFF OFF OFF OFF OFF ON ON ON

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.)

(2) Linear expansion valve operation

C

·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

B to

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

Close

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

Open

A

B

Extra tightning (about 32 pulse)

Pulse number

500 pulse

Opening a valve all the way

51

OCH415A-2.qxp 08.2.21 8:15 AM Page 52

(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

Main body

Coil

Lead wire

<How to detach the coil>

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.

<How to attach the coil>

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 wounded 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

OCH415A-2.qxp 08.2.21 8:15 AM Page 53

11-8. EMERGENCY OPERATION

(1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.

When following abnormalities occur, emergency operation will be available.

Error code

U4

E8

Inspected content

Open/short of pipe thermistor (TH3/TH6)

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

E9

E0 ~ E7

Ed

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)

(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.)

SW4

ON

Heating ON

CN31

Shorting pins

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

Heating

Cooling

53

OCH415A-2.qxp 08.2.21 8:15 AM Page 54

(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

Operation mode

COOL

27 :

HEAT

20.5

:

Remarks

Intake temperature (TH1)

Indoor liquid pipe temperature (TH2)

5 : 45 :

Indoor 2-phase pipe temperature (TH5)

5 : 50 :

Set temperature

25 :

22 :

Outdoor fluid pipe temperature (TH3)

Outdoor 2-phase pipe temperature (TH6)

45

50

:

:

5

5

:

:

( w

1)

( w

1)

( w

1)

Outdoor air temperature (TH7)

Temperature difference code

(room temperature - set temperature)(

Tj)

Discharge superheat (SHd)

35

5

: 5 :

5

Sub-cool (SC)

30deg

5deg

30deg

5deg

( w

2)

( w

2) w

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.

w

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.

Thermistor

TH3

TH6

TH5

TH2

COOL HEAT

45 : 5 :

Tb

Ta

Regard normal figure as effective data.

5

:

5 :

50 :

45 :

Degree of subcooling (SC)

Cooling = TH6- TH3 = Ta -45

Heating = TH5- TH2 = 50 - 45 = 5 deg.

54

OCH415A-2.qxp 08.2.21 8:15 AM Page 55

11-9. TEST POINT DIAGRAM

Outdoor controller circuit board

PUHZ-P100VHA2.UK

PUHZ-P125VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2

1

.UK

SW1

Forced defrost, detect history record reset, refrigerant address

SW7

Demand control setting

<CAUTION> TEST POINT

1 is high voltage.

PUHZ-P140VHA2.UK

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

SW6

Model select

SW4

Test operation

SWP pump down

SW5

Function switch, model select

CN4

Transmission to outdoor power circuit board (CN4)

SW8

Pipe replace

Wiring replace

CNM

Connect to A control service tool

SV1/CH

Crankcase heater

(P125, P140 only)

CNMNT

Connect to

M-NET adapter(CN5)

CNVMNT

Connect to

M-NET adapter(CND)

SV2

Bypass valve

(P125, P140 only)

LEV-A

Linear expansion valve

TH4

Thermistor

<Discharge>

21S4

Four-way valve

TH3

Thermistor

<Outdoor pipe>

TH7/6

Thermistor

<Outdoor/

2-phase pipe>

CN2

Connect to the outdoor power circuit board

1

-

5

: Reception from power circuit board

2

-

5

: Zero cross signal

(0-5V DC)

3

,

4

: Not used

6

-

5

: 16V DC

7

-

5

: 16V DC

63H

High pressure switch

V

FG

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

(Same as

(CNF1

7

(+)-

4

(-))

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)

V

SP

(Voltage between pins of C5A, C5B): DC 0V

(when stopped), DC 1–

6.5V

(when operated)

CNF1, CNF2

CNDC

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)

280V DC

(

1

+,

3

-)

(Indoor power board)

CNS

S1-S2:A220-240V AC

+ -

Communication power supply

D71 Voltage

24V DC

55

OCH415A-2.qxp 08.2.21 8:15 AM Page 56

Outdoor noise filter circuit board

PUHZ-P100VHA2.UK

PUHZ-P125VHA2.UK

PUHZ-P140VHA2.UK

PUHZ-P125VHA2

PUHZ-P140VHA2

1

1

.UK

.UK

CNAC1, CNAC2

220-240V AC

(Connect to the outdoor controller circuit board

(CNAC))

EI

Connect to the earth

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))

E2

Connect to the earth.

CN5

Primary current

(Connect to the outdoor power circuit board

(CN5))

56

LI, NI

Voltage of 220-240V AC is input

(Connect to the terminal block(TB1)).

OCH415A-2.qxp 08.2.21 8:16 AM Page 57

Outdoor power circuit board

PUHZ-P100VHA2.UK

PUHZ-P125VHA2.UK

PUHZ-P140VHA2.UK

PUHZ-P125VHA2

1

.UK

PUHZ-P140VHA2

1

.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

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

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)

TABP2/SC-P2

Connect to ACTM

TABN

Connect to the smoothing capacitor

CB –

TABP

Connect to the smoothing capacitor CB +

TABU/V/W

Connect to the compressor (MC)

Voltage among phases:10V~180V AC

TABN2

TABP1

Connect to

ACTM

TABN1

Connect to

ACTM

Connect to ACTM

57

OCH415A-2.qxp 08.2.21 8:16 AM Page 58

11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

Type of switch

Switch

No.

Function

Action by the switch operation

ON OFF

1

2

Compulsory defrosting w

1

Abnormal history clear

ON

Start

Clear

ON ON

Normal

Normal

ON

Effective timing

When compressor is working in heating operation. w off or operating

3

1 2 3

0

4 5 6

ON

1 2 3 4 5 6

1

ON

1 2 3 4 5 6

2

ON

1 2 3 4 5 6

3

ON

Dip switch

SW1

4

Refrigerant address setting

1 2 3

4

4 5 6

ON

1 2 3 4 5 6

5

ON

1 2 3 4 5 6

6

ON

1 2 3 4 5 6

7

ON

When power supply ON

5

1 2 3

8

4 5 6

ON

1 2 3 4 5 6

9

ON

1 2 3 4 5 6

10

ON

1 2 3 4 5 6

11

ON

6

1 2 3 4 5 6

12

1 2 3 4 5 6

13

1 2 3 4 5 6

14

1 2 3 4 5 6

15

SW4

1

2

Test run

Test run mode setting

Operating

Heating

OFF

Cooling

Under suspension w

1Compulsory 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.

Type of

Switch

Switch

No.

SW5

Function

1 No function

2

3,4,5

6

Power failure automatic recovery w

2

No function model select

Action by the switch operation

ON OFF

— —

Auto recovery

No auto recovery

Effective timing

When power supply ON

1

2

Refer to next page.

Power consumption

(Demand switch ON)

0% (Operation stop)

50%

75%

Always

Dip switch

SW7 w

4

Setting of demand control w

3

SW7-1 SW7-2

OFF OFF

ON

OFF

OFF

ON

SW8

SW9

3

1

1

2

5

6

3

4

2

3,4

Max Hz setting (cooling)

Max Hz setting (heating)

No function

Defrost Hz setting

Use of existing pipe

No function

No function

No function

Function switch

No function

Max Hz(cooling) o

0.8

Max Hz(heating) o

0.8

For high humidity

Used

Valid

Normal

Normal

Normal

Not used

Normal

Always

Always

Always

Always

Always

Push switch

SWP Pump down Start Normal Under suspension w

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

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

Please refer to the indoor unit installation manual.

w

3 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)) w

4 Please do not use SW7-3~5 usually. Trouble might be caused by the usage condition.

58

OCH415A-2.qxp 08.2.21 8:16 AM Page 59

(2) Function of connectors and switches

Types

Connector

SW6

SW5-6

Connector

Switch

CN31

SW6-1

SW6-2

SW6-3

SW6-4

SW6-5

SW6-6

SW6-7

SW6-8

SW5-6

Function

Emergency operation

Model select

Action by open/ short operation

Short Open

Start Normal

MODEL SW5-6

100V

ON

OFF

1 2 3 4 5 6

SW6

ON

OFF

1 2 3 4 5 6 7 8

125V

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6 7 8

140V

ON

OFF

1 2 3 4 5 6

ON

OFF

1 2 3 4 5 6 7 8

Effective timing

When power supply ON

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

Purchased locally

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Adaptor for external signal input

(PAC-SC36NA)

Outdoor unit controller board

Relay supply

~

SW1

X

X

Red 3

Brown 2

Orange 1

3

2

1

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

OFF

OFF

ON

Power consumption

(SW1 on)

0% (Operation stop)

50%

75%

59

OCH415A-2.qxp 08.2.21 8:16 AM Page 60

<Display function of inspection for outdoor unit>

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

Outdoor controller board

LED1 (Green) LED2 (Red)

Lighted

Lighted

Lighted

Lighted

Lighted

Not lighted

Not lighted

Lighted

A-Control Service Tool

Error code Indication of the display

Alternately blinking display

Operation mode 00, etc.

08, etc.

C5, H7 etc.

(2) Abnormal condition

Indication Error

Outdoor controller board

LED1 (Green) LED2 (Red)

Contents

1 blinking 2 blinking Connector(63H) is open.

2 blinking 1 blinking

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

2 blinking

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.

3 blinking

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.

Error code w

1

F5

Inspection method

1

Check if connector (63H) on the outdoor controller

board is not disconnected.

2

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

E6

E7

E0

E3

E4

Detailed reference page

P.28

1

Check if indoor/outdoor connecting wire is connected correctly.

2

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

3

Check if noise entered into indoor/outdoor connecting wire

or power supply.

4

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

P.29

(EA)

P.29

(Eb)

P.29

(EC)

w

2

1

Check if indoor/outdoor connecting wire is connected correctly.

2

Check if noise entered into indoor/outdoor connecting wire or

power supply.

3

Check if noise entered into indoor/outdoor controller board.

4

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

w

2

P.34

(E8)

P.35

(E9)

1

Check if connecting wire of indoor unit or remote controller

is connected correctly.

2

Check if noise entered into transmission wire of remote

controller.

3

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

P.33

P.34

P.33

Remote controller transmitting error is detected by indoor unit.

E5 P.34

4 blinking

Error code is not defined.

EF

1

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

2

Check if noise entered into transmission wire of remote controller.

3

Check if noise entered into indoor/outdoor connecting wire.

4

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

P.34

5 blinking

Serial communication error

<Communication between outdoor controller board and outdoor power board>

<Communication between outdoor controller board and M-NET p.c. board>

Communication error of high prior signal(M-NET)

Ed

A0~A8

W

1.Error code is displayed on remote controller.

W

2.Refer to service manual for indoor unit.

1

Check if connector (CN4) on outdoor controller board and

outdoor power board is not disconnected.

2

Check if there is poor connection of connector on outdoor

controller board(CNMNT and CNVMNT).

3

Check M-NET communication signal.

P.34

P.35~

P.38

60

OCH415A-3.qxp 08.2.21 8:14 AM Page 61

Indication

Outdoor controller board

LED1 (Green) LED2 (Red)

Contents

3 blinking 1 blinking

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

Error

Error code w

1

U2

U1

Inspection method

1

Check if stop valves are open.

2

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

disconnected.

3

Check if unit fills with specified amount of refrigerant.

4

Measure resistance values among terminals on indoor valve and outdoor linear

expansion valve using a tester.

1

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

2

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

3

Check if heat exchanger and filter are not dirty.

4

Measure resistance values among terminals on linear expansion valve using a

tester.

U8

1

Check the outdoor fan motor.

2

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

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

(TH3, TH6, TH7 and TH8)

Ud

UF

UP

UH

U6

U3

U4

1

Check if stop valves are open.

2

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

3

Measure resistance values among terminals on compressor using a tester.

4

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

1

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

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

2

Measure resistance value of outdoor thermistors.

Detailed reference page

P.30

P.30

P.32

P.32

P.33

P.32

P.31

P.31

P.31

6 blinking

Abnormality of heatsink temperature

7 blinking

Abnormality of voltage

U5

1

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

2

Measure resistance value of outdoor thermistor(TH8).

U9

1

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

2

Measure resistance value among terminals on compressor using a tester.

3

Check the continuity of contactor (52C).

4

Check if power supply voltage decreases.

5

Check the wiring of CNAF.

P.31

P.32

4 blinking 1 blinking

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

P1

P2

P9

1

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

are not disconnected.

2

Measure resistance value of indoor thermistors.

P4

P5

1

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

2

Measure resistance value of indoor thermistors.

3

Measure resistance value among terminals on drain-up machine using a tester.

4

Check if drain-up machine works.

5

Check drain function.

3 blinking

Freezing (cooling)/overheating

(heating) protection

4 blinking

Abnormality of pipe temperature

P6

P8

1

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

2

Check if heat exchanger and filter is not dirty.

3

Measure resistance value on indoor and outdoor fan motors.

4

Check if the inside of refrigerant piping is not clogged.

1

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

2

Check if stop valve is open.

3

Check converse connection of extension pipe. (on plural units connection)

4

Check if indoor/outdoor connecting wire is connected correctly. (on plural units

connection)

W

1 Error code displayed on remote controller

W

2 Refer to service manual for indoor unit.

W

2

W

2

W

2

W

2

W

2

W

2

61

OCH415A-3.qxp 08.2.21 8:14 AM Page 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 Display detail Explanation for display Unit

ON

1 2 3 4 5 6

<Digital indicator LED1 working details>

(Be sure the 1 to 6 in the SW2 are set to OFF.)

(1) Display when the power supply ON.

When the power supply ON, blinking displays by turns.

Wait for 4 minutes at the longest.

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

1

Operation mode display.

(Lighting)

LED1

1 second interval

ON

SW2

1 2 3 4 5 6

(Initial setting)

The tens digit : Operation mode

Display

O

C

Operation Model

OFF / FAN

COOLING / DRY w

HEATING H d DEFROSTING w

C5 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.

The ones digit : Relay output

Display

Warming-up

Compressor

Compressor

8

A

0

1

2

3

4

5

6

7

ON

ON

ON

ON

ON

ON

4-way valve

ON

ON

ON

ON

ON

(3) When the display blinks

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

Solenoid valve

ON

ON

ON

ON

Display Inspection unit

0

1

2

3

Outdoor unit

Indoor unit 1

Indoor unit 2

Indoor unit 3

Display Contents to be inspected (During operation)

U1

U2

Abnormal high pressure (63H worked)

Abnormal high discharging temperature, shortage of refrigerant

U3 Open/short circuit of discharging thermistor(TH4)

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

U4

U5

U6

Abnormal temperature of heatsink

Abnormality of power module

U8

Ud

UF

Abnormality in outdoor fan motor

Overheat protection

UH

UL

UP

Compressor overcurrent interruption (When Comp. locked)

Current sensor error

Abnormal low pressure

P1~P8

A0~A7

Compressor overcurrent interruption

Abnormality of indoor units

Communication error of high-prior signal (M-NET)

Display

Contents to be inspected (When power is turned on)

F5

63H connector(yellow) is open.

E8

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

E9

EA

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

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

Eb

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

EC

Startup time over

E0~E7

Communication error except for outdoor unit

62

OCH415A-3.qxp 08.2.21 8:14 AM Page 63

SW2 setting Display detail

Pipe temperature / Liquid(TH3)

– 40~90

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Discharge temperature (TH4)

3~217

Explanation for display

– 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

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

Unit

:

:

ON

1 2 3 4 5 6

Output step of outdoor FAN

0~10

Step

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

The number of ON / OFF times of compressor

0~9999

Compressor integrating operation times

0~9999

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

100 times

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

10 hours

Compressor operating current

0~50

0~50 w

Omit the figures after the decimal fractions.

A

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Compressor operating frequency

0~255

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

LEV-A opening pulse

0~480

Error postponement code history (1) of outdoor unit

Operation mode on error occurring

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

0~480

(When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.

(Example) When 150 pulse;

0.5 secs. 0.5secs. 2 secs.

1 50

Postponement code display

Blinking: During postponement

Lighting: Cancellation of postponement

“00” is displayed in case of no postponement.

Operation mode of when operation stops due to error is displayed by setting SW2 like below.

(SW2)

ON

Hz

Pulse

Code display

Code display

1 2 3 4 5 6

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OCH415A-3.qxp 08.2.21 8:14 AM Page 64

SW2 setting

ON

1 2 3 4 5 6

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

ON

1 2 3 4 5 6

Compressor temperature (TH4) or discharge temperature (TH4) on error occurring

3~217

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

Unit

:

:

ON

1 2 3 4 5 6

Compressor operating current on error occurring

0~20

0~20

A

ON

1 2 3 4 5 6

Error code history (1) (latest)

Alternate display of abnormal unit number and code

When no error history,

“ 0 ” and “– –” are displayed by turns.

Code display

ON

1 2 3 4 5 6

Error code history (2)

Alternate display of error unit number and code

When no error history,

“ 0 ” and “– –” are displayed by turns.

Code display

Thermo ON time

0~999

ON

1 2 3 4 5 6

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

Minute

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

Minute

64

OCH415A-3.qxp 08.2.21 8:14 AM Page 65

SW2 setting Display detail

The number of connected indoor units

ON

Explanation for display

0~3

(The number of connected indoor units are displayed.)

1 2 3 4 5 6

Capacity setting display

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Outdoor unit setting information

ON

1 2 3 4 5 6

Indoor pipe temperature / Liquid

(TH2(1))

Indoor 1

– 39~88

Unit

Unit

Displayed as an outdoor capacity code.

Capacity

P100V

P125V

P140V

Code

20

25

28

Code display

• The tens digit (Total display for applied setting)

Setting details Display details

H·P / Cooling only

Single phase / 3 phase

0 : H·P 1 : Cooling only

0 : Single phase 2 : 3 phase

• The ones digit

Setting details Display details

Defrosting switch 0 : Normal 1 : For high humidity

(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.)

Code display

:

ON

1 2 3 4 5 6

Indoor pipe temperature / Cond. / Eva.

(TH5(1))

Indoor 1

– 39~88

– 39~88

(When the temperature is 0 : or less, “–” and temperature are displayed by turns.)

:

ON

1 2 3 4 5 6

Indoor pipe temperature / Liquid

(TH2(2))

Indoor 2

– 39~88

– 39~88

(When the temperature is 0 : or less, “–” and temperature are displayed by turns.)

ON

1 2 3 4 5 6

Indoor pipe temperature / Cond. / Eva.

(TH5(2))

Indoor 2

– 39~88

– 39~88

(When the temperature is 0 : or less, “–” and temperature are displayed by turns.)

ON

1 2 3 4 5 6

Indoor room temperature (TH1)

8~39

8~39

:

:

:

65

OCH415A-3.qxp 08.2.21 8:14 AM Page 66

SW2 setting

ON

Display detail

Indoor setting temperature

17~30

1 2 3 4 5 6

ON

Outdoor pipe temperature / Cond./

Eva. (TH6)

-39~88

1 2 3 4 5 6

ON

1 2 3 4 5 6

Outdoor outside temperature (TH7)

-39~88

Outdoor heatsink temperature (TH8)

-40~200

ON

1 2 3 4 5 6

17~30

Explanation for display

-39~88

(When the temperature is 0

: or less, “–” and temperature are displayed by turns.)

-39~88

(When the temperature is 0 : or less, “–” and temperature are displayed by turns.)

-40~200

(When the temperature is 0

: or less, “–” and temperature are displayed by turns.)

(When the thermistor detects 100 : or more, hundreds digit, tens digit and ones digit are displayed by turns.)

0~255

(When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

ON

1 2 3 4 5 6

Discharge superheat. SHd

0~255

Cooling = TH4-TH6

Heating = TH4-TH5

ON

1 2 3 4 5 6

Sub cool. SC

0~130

Cooling = TH6-TH3

Heating = TH5-TH4

Input current of outdoor unit

ON

1 2 3 4 5 6

0~500

(When it is 100 or more, hundreds digit, tens digit and ones digit are displayed by turns.)

Unit

:

:

:

:

°C

0~130

(When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

°C

0.1 A

ON

1 2 3 4 5 6

Targeted operation frequency

0~255

0~255

(When it is 100Hz or more, hundreds digit, tens digit and ones digit are displayed by turns.)

Hz

ON

1 2 3 4 5 6

DC bus voltage

180~370

180~370

(When it is 100V or more, hundreds digit, tens digit and ones digit are displayed by turns.)

V

66

OCH415A-3.qxp 08.2.21 8:14 AM Page 67

SW2 setting

ON

1 2 3 4 5 6

ON

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

1 2 3 4 5 6

Error postponement code history (3) of outdoor unit

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Explanation for display

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 00

Postponement code display

Blinking: During postponement

Lighting: Cancellation of postponement

“00” is displayed in case of no postponement.

Postponement code display

Blinking: During postponement

Lighting: Cancellation of postponement

“00” is displayed in case of no postponement.

Unit

%

Code display

Code display

Error code history (3) (Oldest)

Alternate display of abnormal unit number and code.

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

Code display

ON

1 2 3 4 5 6

Error thermistor display

When there is no error thermistor,

“–“ is displayed.

3: Outdoor pipe temperature /Liquid (TH3)

6: Outdoor pipe temperature /Cond./Eva. (TH6)

7: Outdoor outside temperature (TH7)

8: Outdoor radiator panel (TH8)

Code display

ON

1 2 3 4 5 6

Operation frequency on error occurring

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.

1 25

Hz

ON

1 2 3 4 5 6

Fan step on error occurring

0~10

0~10

Step

67

OCH415A-3.qxp 08.2.21 8:14 AM Page 68

SW2 setting

ON

1 2 3 4 5 6

Display detail

LEV-A opening pulse on error occurring

0~480

Explanation for display

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

Unit

Pulse

ON

1 2 3 4 5 6

Indoor room temperature (TH1) on error occurring

8~39

8~39

:

ON

1 2 3 4 5 6

Indoor pipe temperature / Liquid (TH2) on error occurring

-39~88

-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

ON

1 2 3 4 5 6

Indoor pipe temperature / 2-phase (TH5) on error occurring

-39~88

-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

ON

1 2 3 4 5 6

Outdoor pipe temperature / Cond./ Eva.

(TH6) on error occurring

-39~88

-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

ON

1 2 3 4 5 6

Outdoor outside temperature (TH7) on error occurring

-39~88

-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

ON

1 2 3 4 5 6

Outdoor heatsink temperature (TH8) on error occurring

-40~200

-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.)

:

:

:

:

:

68

OCH415A-3.qxp 08.2.21 8:14 AM Page 69

SW2 setting

ON

1 2 3 4 5 6

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

:

ON

1 2 3 4 5 6

Sub cool on error occurring. SC

0~130

Cooling = TH6-TH3

Heating = TH5-TH2

Thermo-on time until error stops

0~999

ON

1 2 3 4 5 6

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

Minute

ON

1 2 3 4 5 6

Indoor pipe temperature / Liquid

(TH2 (3))

Indoor 3

-39~88

-39~88

(When the temperature is 0°C or less, “–” and temperature are displayed by turns.)

:

ON

1 2 3 4 5 6

Indoor pipe temperature / Cond./ Eva.

(TH5 (3))

Indoor 3

-39~88

-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.

:

ON

1 2 3 4 5 6

U9 Error status during the Error postponement period

Description

Normal

Overvoltage error

Undervoltage error

Input current sensor error

L

1

-phase open error

Abnormal power synchronous signal

PFC/ ACTM errorUndervoltage

Detection point

Power circuit board

Controller circuit board

Controller circuit board

Power circuit board

Check CNAF wiring.

Defective ACTM/ P.B.

W

Display examples for multiple errors:

Overvoltage (01) + Undervoltage (02) = 03

Undervoltage (02) + Power-sync signal error (08) = 0A

Display

00

01

02

04

08

20

Code display

69

OCH415A-3.qxp 08.2.21 8:14 AM Page 70

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.)

W

1 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

Settings

Power failure automatic recovery

Indoor temperature detecting

W

1

LOSSNAY connectivity

Power supply voltage

Auto operating mode

Frost prevention temperature

Humidifier control

Change of defrosting control

OFF

ON

Average data from each indoor unit

Data from the indoor unit with remote controller

Data from main remote controller

Not supported

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

Supported (Indoor unit intakes outdoor air through LOSSNAY)

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

Initial setting

Mode No. Setting No.

(when sent from the factory)

01

02

03

04

05

15

16

17

1

2

1

2

1

2

1

2

3

1

2

1

2

3

1

2

1

2

Remarks

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

Meaning of "Function setting"

Mode02:indoor temperature detecting

OUTDOOR

OUTDOOR OUTDOOR OUTDOOR

INDOOR INDOOR

INDOOR INDOOR INDOOR INDOOR

REMOTE

(MAIN)

REMOTE

(SUB)

No. Indoor temperature(ta)=

No.1 Average data of the Initial sensor on all the indoor units setting ta=(A+B)/2 ta=A No.2 The data of the sensor on the indoor unit that connected with remote controller

No.3 The data of the sensor on main remote controller.

ta=C

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

REMOTE

(MAIN)

REMOTE

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

REMOTE

(MAIN)

REMOTE

(SUB)

REMOTE

(MAIN) ta=A ta=A ta=C ta=A ta=A ta=C

70

OCH415A-3.qxp 08.2.21 8:14 AM Page 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.

Function Settings

Filter sign

Air flow

(Fan speed)

100Hr

2500Hr

No filter sign indicator

Quiet

Standard

No.of air outlets

High ceiling

4 directions

3 directions

2 directions

Optional high efficiency

Not supported filter

Vane setting

Supported

No vanes (Vane No.3 setting : PLA-BA only)

Vane No.1 setting

Vane No.2 setting

Energy saving air flow (Heating mode)

Disabled

Enabled

Optional humidifier

(PLA-BA only)

Not supported

Supported

Vane differential setting No.1 setting (TH5: 24-28 :

) in heating mode

No.2 setting (Standard, TH5:28-32 :

)

(cold wind prevention)

Swing

No.3 setting (TH5: 32-38 :

)

Not available Swing

}

PLA-BA mode (4 deg up)

Available

Set temperature in heating Available

Wave air flow

Temperature correction: Valid

Not available Temperature correction: Invalid

}

PLA-BA

Fan speed when the Extra low heating thermostat is OFF Stop

Set fan speed

Fan speed when the Set fan speed cooling thermostat is OFF Stop

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

Mode

No.

07

08

09

10

11

12

13

14

23

24

25

27

28

1

2

3

1

2

1

2

1

2

1

2

3

1

2

2

3

1

2

3

1

3

1

1

2

2

1

2

3

1

2

1

2

Setting

No.

4-Way cassette

Initial setting (Factory setting)

- : Not available

Ceiling concealed

PLA-BA(2)

PEAD-EA(2)

PEAD-GA

Ceiling suspended

Wall mounted

Floor standing

PCA-GA(2) PCA-HA PKA-GAL PSA-GA

PKA-FAL(2)

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

71

OCH415A-3.qxp 08.2.21 8:14 AM Page 72

12-1-1. Selecting functions using the wired remote controller

First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given.

For actual operations, refer to steps

1

to

0

.

Setting number

Refrigerant address Unit number

Mode number

I

F

A

E

G

B

Modes 01 to 14 can be activated by pressing buttons

A

and

B simultaneously, and modes 15 to

28 by pressing buttons

B

and

J

.

J

C

D

Selecting functions using the wired remote controller

1

Check the function selection setting.

2

Switch to function setting mode.

(Press

A

and

B

at the same time

with the remote controller stopped.)

For modes 15 and higher, press

J

and

B

at the same time.

3

Specify refrigerant address 00 (outdoor unit)

4

Specify unit No. 00. (indoor unit)

(Use

C

and

D

.)

5

Enter the setting.

(Press

E

.)

(Specified indoor unit:

BLOW operation)

6

Select mode No. 02

(room temperature detection position).

7

Select setting No. 03 (remote controller fixed).

(Use

F

and

G

.)

8

Enter the setting.

(Press

E

.)

Example:

Selecting room temperature detection position

NO

YES

Change refrigerant address or unit No.

9

Finished

YES

NO

0

Ending function display

(Press

A

and

B

at the same time.)

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

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OCH415A-3.qxp 08.2.21 8:14 AM Page 73

[Operating Procedure]

1

Check the setting items provided by function selection.

If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps

2 to

7

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

2

Switch off the remote controller.

A

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

3

Set the outdoor unit's refrigerant address.

C

Press the [ CLOCK] buttons ( and ) to select the desired refrigerant address. The refrigerant address changes from "00" to "15".

(This operation is not possible for single refrigerant systems.)

Refrigerant address display section

* If the unit stops after

FUNCTION

SELECTION

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

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

Note

If you have made operational mistakes during this procedure, exit function selection (see step

0

), and then restart from step

2

.

4

Set the indoor unit number.

D

Press the area.

ON/OFF button so that "- -" blinks in the unit number display

C

Press the [ CLOCK] buttons ( and ) to select the unit number of the indoor unit for which you want to perform function selection. The unit number changes to "00", "01", "02","03",04" and "AL" each time a button is pressed.

Unit number display section

* To set modes 01 to 06 or 15 to 22 select unit number "00".

* To set modes 07 to 14 or 23 to 28 carry out as follows:

• To set each indoor unit individually, select "01" to "04".

• To set all the indoor units collectively, select "AL".

5

Check the refrigerant address and unit number.

E

Press the

MODE

button to confirm the refrigerant address and unit number.

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

Mode number display section

* "88" address does not exist in the system.

Furthermore, if "F" appears and blinks in the unit number display area and the refrigerant address display area also blinks, there are no units that correspond to the selected unit number. In this case, the refrigerant address and unit number may be incorrect, so repeat steps

2

and

3

to set the correct ones.

6

Select the mode number.

F

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

(Only the selectable mode numbers can be selected.)

7

Select the setting content for the selected mode.

G

Press the

MENU

button. The currently selected setting number will blink, so check the currently set content.

E

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

MODE button, the corresponding indoor unit will start fan operation. This helps you find the location of the indoor unit for which you want to perform function selection. However, if "00" or "AL" is selected as the unit number, all the indoor units corresponding to the specified refrigerant address will start fan operation.

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

00 refrigerant address

Outdoor unit

Indoor unit Unit number 01 Unit number 02 Unit number 03

Designate operation Remote controller Fan draft

* 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

F

Press the [ TEMP] buttons ( number.

Mode number 02 = Indoor tempreture detection

and ) to select the desired setting

Setting number display section

Setting number 1 = Indoor unit operating average

8

Register the settings you have made in steps

3

to

7

.

E

Press the

MODE

button. The mode number and setting number will start to blink and registration starts.

Setting number 3 = Remote controller built-in sensor

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

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

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

9

If you wish to continue to select other functions, repeat steps

3

to

8

.

0

Complete function selection.

A

FILTER TEST simultaneously for at least 2 seconds.

After a while, the function selection screen will disappear and the air conditioner OFF screen will reappear.

* Do not operate the remote controller for at least 30 seconds after completing function selection. (No operations will be accepted even if they are made.)

Note

If a function of an indoor unit is changed by function selection after installation is complete, make sure that a " " mark, etc., is given in the "Check" column of Table

1 to indicate the change.

73

OCH415A-3.qxp 08.2.21 8:14 AM Page 74

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

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]

CHECK

ON/OFF TEMP

FAN AUTO STOP

MODE VANE

AUTO START

CHECK LOUVER h

The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation .

The procedure is given after the flow chart.

1

Check the function selection setting.

2

Switch to function selection mode.

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

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

"INSPECT".

3

Specify unit No. "01" (since the function applies to unit 01).

(Set address "01" while still in troubleshooting mode, then press the MINUTE button.)

Note: You can not specify the refrigerant address.

6

4

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

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

NO

7

YES

Change

unit No.

5

Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

TEST RUN min

SET RESET CLOCK Finished

NO

YES

8

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.

[Operating instructions]

1

Check the function settings.

2

CHECK

Press the button twice continuously.

CHECK is lit and “00” blinks.

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press h 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.) min

Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

min

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 h 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) h

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.

74

OCH415A-3.qxp 08.2.21 8:14 AM Page 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")

Language setting to display

Item 2

(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.")

4.Display change

("DISP MODE SETTING")

(1) Temperature display : /

°

F setting ("TEMP MODE : /

°

F")

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

(3) Automatic cooling/heating display setting ("AUTO MODE DISP C/H")

Item 3 (Setting content)

• Display in multiple languages is possible.

• Setting the range of operation limit (operation lock)

• Setting the use or non-use of "automatic" operation mode

• Setting the temperature adjustable range (maximum, minimum)

• Selecting main or sub remote controller

* When two remote controllers are connected to one group, one controller must be set to sub.

• Setting the use or non-use of clock function

• Setting the timer type

• Contact number display in case of error

• Setting the telephone number

• Setting the temperature unit ( : or

°

F) to display

• Setting the use or non-use of the display of indoor (suction) air temperature

• Setting the use or non-use of the display of "Cooling" or "Heating" display during

operation with automatic mode

[Function selection flowchart] Refer to next page.

[1] Stop the air conditioner to start remote controller function selection mode.

[2] Select from item1.

[3] Select from item2.

[4] Make the setting.

(Details are specified in item3) ➔ [5] Setting completed.

➔ [6] Change the display to the normal one. (End)

[Detailed setting]

[4] -1. CHANGE LANGUAGE setting

The language that appears on the dot display can be selected.

• Press the [ MENU] button to change the language.

1

Japanese (JP),

2

English (GB),

3

German (D),

4

Spanish (E),

5

Russian (RU),

6

Italian (I),

7

Chinese (CH),

8

French (F)

[4] -2. Function limit

(1) Operation function limit setting (operation lock)

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

1

no1 : Operation lock setting is made on all buttons other than the [ ON/OFF] button.

2

no2 : Operation lock setting is made on all buttons.

3

OFF (Initial setting value) : Operation lock setting is not made

* To make the operation lock setting valid on the normal screen, it is necessary to press buttons (Press and hold down the [FILTER] and [ ON/OFF] buttons at the same time for 2 seconds.) on

(2) Use of automatic mode setting

When the remote controller is connected to the unit that has automatic operation mode, the following settings can be made.

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

1

ON (Initial setting value) : The automatic mode is displayed when

2

OFF the operation mode is selected.

: The automatic mode is not displayed when the operation mode is selected.

[4] -3. Mode selection setting

(1) Remote controller main/sub setting

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

1

Main : The controller will be the main controller.

2

Sub : The controller will be the sub controller.

(2) Use of clock setting

1

2

3

4

To switch the setting, press the [ the followings.).

1

WEEKLY TIMER (initial setting):

SIMPLE TIMER:

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 weekly timer can be used.

2

AUTO OFF TIMER: The auto off timer can be used.

The simple timer can be used.

TIMER MODE OFF: The timer mode cannot be used.

* When the use of clock setting is OFF, the "WEEKLY TIMER" cannot be used.

(4) Contact number setting for error situation

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

1

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

2

CALL **** *** **** : The set contact numbers are displayed in case of error.

CALL_ : The contact number can be set when the display is as shown on the left.

• Setting the contact numbers

To set the contact numbers, follow the following procedures.

Move the flashing cursor to set numbers. Press the [ TEMP. ( ) and

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

( ) and ( )] button to set the numbers.

(3) Temperature range limit setting

After this setting is made, the temperature can be changed within the set range.

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

1

LIMIT TEMP COOL MODE :

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

2

LIMIT TEMP HEAT MODE :

The temperature range can be changed on heating mode.

3

LIMIT TEMP AUTO MODE :

The temperature range can be changed on automatic mode.

4

OFF (initial setting) : The temperature range limit is not active.

* When the setting, other than OFF, is made, the temperature range limit setting on cooling, heating and automatic mode is made at the same time. However the range cannot be limited when the set temperature range has not changed.

• To increase or decrease the temperature, press the [ TEMP ( ) or ( )] button.

• To switch the upper limit setting and the lower limit setting, press the [ ] button. The selected setting will flash and the temperature can be set.

• Settable range

Cooling/Dry mode : Lower limit: 19 : ~ 30 : Upper limit: 30 : ~ 19 :

Heating mode : Lower limit: 17 : ~ 28 : Upper limit: 28 : ~ 17 :

Automatic mode : Lower limit: 19

:

~ 28

:

Upper limit: 28

:

~ 19

:

[4] -4. Display change setting

(1) Temperature display

1 :

2

°

: / F setting

To switch the setting, press the [

: The temperature unit

F: The temperature unit

:

ON/OFF] button.

is used.

°

F is used.

(2) Room air temperature display setting

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

1

ON : The room air temperature is displayed.

2

OFF : The room air temperature is not displayed.

(3) Automatic cooling/heating display setting

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

1

ON : One of "Automatic cooling" and "Automatic heating" is displayed under the automatic mode is running.

2

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

75

OCH415A-3.qxp 08.2.21 8:14 AM Page 76

[Function selection flowchart]

Setting language (English)

Change

Language

Function selection

Mode selection

Display mode setting

Item 1

E

E

Normal display

(Display when the air conditioner is not running)

Hold down the

E button and press the

D button for 2 seconds.

Hold down the

E button and press the

D button for 2 seconds.

Press the operation mode button.

Press theTIMER MENU button.

Press theTIMER ON/OFF button.

Remote controller function selection mode

G

Item 2

English

G

Germany

Dot display

Spanish

F

G

Russian

Italian

E

G

TEMP.

MENU

BACK MONITOR/SET

PAR-21MAA

ON/OFF

DAY

CLOCK OPERATION

ON/OFF

FILTER

CHECK TEST

CLEAR

I

A

B

Chinese

H

French

C D

Japanese

D

G D

Item 3

OFF no1

Operation lock setting is not used.

(Initial setting value)

Operation lock setting is except On/Off button.

G

D

D no2

Operation lock setting is all buttons.

D

E

G

G

D

D

ON

OFF

OFF

D

D

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.

G D

The temperature range can be changed on heating mode.

G

G

D

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)

D

G

D

D

ON

The remote controller will be the sub controller.

The clock function can be used. (Initial setting value)

E

G

G

D

D

OFF

D

The clock function can not be used.

Weekly timer can be used. (Initial setting value)

D

Auto off timer can be used.

G

D

Simple timer can be used.

Timer mode can not be used.

G

G

G

D

OFF

D

D

CALL-

C

D

D

F

ON

D

D

The temperature unit ˚F is used.

Room air temperature is displayed. (Initial setting value)

D

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)

G

D

D

OFF

ON

D

OFF

D

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.

76

OCH415A-3.qxp 08.2.21 8:14 AM Page 77

13 EASY MAINTENANCE FUNCTION

Reduces maintenance work drastically.

Enables you to check operation data of the indoor and outdoor units by remote controller.

Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models.

Smooth Maintenance Function

Discharge temperature 64

:

Conventional inspection work

Outdoor unit

Indoor unit

Remove the service panel.

Measure the intake air temperature.

Easy maintenance information (unit)

1

2

3

Compressor

Accumulated operating time ( o

10 hours)

Number of ON/OFF times ( o

10 times)

Operating current (A)

4

5

6

Outdoor unit

Heat exchanger temperature ( : )

Discharge temperature ( : )

Outside air temperature ( : )

7

8

9

Indoor unit

Intake air temperature ( : )

Heat exchanger temperature ( : )

Filter operating time* (Hours)

* The filter operating time is the time that has elapsed since the filter was reset.

Measure the discharge temperature.

Measure the outside air temperature

13-1.MAINTENANCE MODE OPERATION METHOD

* If you are going to use 13-2. "GUIDE FOR OPERATION CONDITION", set the airflow to "High" before activating maintenance mode.

Switching to maintenance mode

Maintenance mode can be activated either when the air conditioner is operated or stopped.

It cannot be activated during test run.

w

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

Remote controller button information

A C B

D

Operation mode

Compressor information Outdoor unit information Indoor unit information

Confirm

Activate/cancel maintenance mode

(1) Press the

TEST

button for 3 seconds to switch to maintenance mode.

[Display

A

]

MAINTENANCE

If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).

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

MODE

button to select the desired operation mode.

[Display

A

]

Stable cooling operation

COOL

STABLE MODE

Stable heating operation

HEAT

STABLE MODE

Stable operation cancellation

STABLE MODE

CANCEL

(3) Press the

FILTER

( ) button to confirm the setting.

[Display

D

] Waiting for stabilization

Stabilized

After 10 to 20 minutes

77

OCH415A-3.qxp 08.2.21 8:14 AM Page 78

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

B

]

(5) Select the type of data to be displayed.

After selecting, go to step (6).

Compressor information

MENU

button

[Display

A

]

1

Cumulative operation time

COMP ON x10 HOURS

2

ON/OFF Number

COMP ON x100 TIMES

3

Operating current

COMP ON

CURRENT (A)

Outdoor unit information

ON/OFF

button

[Display

A

]

4

Heat exchanger temperature

OUTDOOR UNIT

H·EXC. TEMP

Indoor unit information

[Display

button

A

]

7

Indoor room temperature

INDOOR UNIT

INLET TEMP

5

8

Comp discharge temperature

OUTDOOR UNIT

OUTLET TEMP

Heat exchanger temperature

INDOOR UNIT

H·EXC. TEMP

6

9

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

C Blinking

Waiting for response

After approx.

10 seconds

12,340 hours

(7) Data is displayed on the display (at

C

).

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

(8) To cancel maintenance mode, press the

TEST

button for 3 seconds or press the

ON/OFF

button.

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

[ Twin ]

Refrigerant address=00

Outdoor unit

Indoor unit

01

Remote controller

Indoor unit

01

Remote controller

Indoor unit

02

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

Refrigerant address

01

Outdoor unit

Refrigerant address

02

Outdoor unit

Indoor unit

01

Indoor unit

01

Indoor unit

01

Remote controller

Refrigerant address

15

Outdoor unit

Indoor unit

01

78

OCH415A-3.qxp 08.2.21 8:14 AM Page 79

12-2.GUIDE FOR OPERATION CONDITION

Compressor

Inspection item Result

Breaker

Terminal block Outdoor Unit

Good

Good

Retightened

Retightened

Indoor Unit

(Insulation resistance)

Good Retightened

M "

(Voltage) V

1

Accumulated operating time

2

Number of ON/OFF times

Time

Times

3

Current A

4

Refrigerant/heat exchanger temperature COOL : HEAT :

5

Refrigerant/discharge temperature COOL : HEAT :

6

Air/outside air temperature COOL

:

HEAT

:

(Air/discharge temperature)

Appearance

Heat exchanger

COOL

Good

Good

: HEAT :

Cleaning required

Cleaning required

Sound/vibration

7

Air/intake air temperature

None Present

COOL : HEAT :

(Air/discharge temperature)

8

COOL

Refrigerant/heat exchanger temperature COOL

:

:

HEAT

HEAT

:

:

9

Filter operating time*

Decorative panel Good

Time

Cleaning required

Filter

Fan

Heat exchanger

Sound/vibration

Good

Good

Good

None

Cleaning required

Cleaning required

Cleaning required

Present

* The filter operating time is the time that has elapsed since the filter was reset.

Check Points

Enter the temperature differences between

5

,

4

,

7

and

8

into the graph given below.

Operation state is determined according to the plotted areas on the graph.

For data measurements, set the fan speed to "Hi" before activating maintenance mode.

Classification Item Result

Inspection

Temperature difference

Inspection

Temperature difference

Is "D000" displayed stably on the remote controller?

(

5

Discharge temperature) – (

4

Outdoor heat exchanger temperature)

(

7

Indoor intake air temperature) – (

8

Indoor heat exchanger temperature)

Is "D000" displayed stably on the remote controller?

(

5

Discharge temperature) – (

8

Indoor heat exchanger temperature)

(

8

Indoor heat exchanger temperature) –

(

7

Indoor intake air temperature)

Stable Unstable

:

:

Stable Unstable

:

:

* Fixed Hz operation may not be possible under the following temperature 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.

Area Check item

Judgment

Cool Heat

Normal

Filter inspection

Inspection A

Inspection B

Inspection C

Normal operation state

Filter may be clogged. *1

Performance has dropped. Detailed inspection is necessary.

Refrigerant amount is dropping.

Filter or indoor heat exchanger may be clogged.

* The above judgement is just guide based on Japanese standard conditions.

*1

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

:

45

40

35

30

Inspection C

25

20

Filter inspection

Normal

15

Inspection B

10

Inspection A

5

0 10 20 30 40 50 60 70 80

:

[

5

Discharge temperature] – [

4

Outdoor heat exchanger temperature)

Heat mode

30

25

20

15

10

:

45

40

Inspection C

Filter inspection

35

Normal

Inspection A

Inspection B

5

0 10 20 30 40 50 60 70 80

:

[

5

Discharge temperature] – [

8

Indoor heat exchanger temperature)

79

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14 MONITORING THE OPERATION DATABYTHE REMOTE CONTROLLER

14-1. HOW TO "MONITOR THE OPERATION DATA"

• Turn on the [Monitoring the operation data]

C

Example) Request code "004"

Discharge temperature 69

;

Refrigerant address "00"

(3)

A

D

B

(7)

(5)

(1)

(2) (6) (4)

B: Refrigerant address

C: Data display area

D: Request code display area

(1) Press the

TEST

button for 3 seconds so that [ Maintenance mode] appears on the screen (at

A

).

(2) Press the

CHECK

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

Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while " - - - -" is blinking), since no buttons are operative.

Operating the service inspection monitor

[

- - - ] appears on the screen (at

D

) when [Maintenance monitor] is activated.

(The display (at

D

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

(3) Press the [TEMP] buttons ( and ) to select the desired refrigerant address.

[Screen

B

]

(4) Press the [CLOCK] buttons ( and ) to set the desired request code No.

(5) Press the

FILTER

button to perform data request.

(The requested data will be displayed at

C

in the same way as in maintenance mode.)

Data collected during operation of the remote controller will be displayed.

The collected data such as temperature data will not be updated automatically even if the data changes.

To display the updated data, carry out step (4) again.

Canceling the Monitoring the operation data

(6) While [Maintenance monitor] is displayed, press the

(7) To return to normal mode, press the

CHECK

button for 3 seconds to return to maintenance mode.

ON/OFF

button.

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OCH415A-3.qxp 08.2.21 8:14 AM Page 81

14-2. REQUEST CODE LIST

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

Request content

Description

(Display range)

Unit Remarks

45

46

47

48

49

39

40

41

36

37

38

42

43

44

21

22

23

24

25

26

27

28

29

30

31

9

10

11

12

13

14

15

16

17

18

3

4

5

0

1

2

6

7

8

Operation state

Compressor-Operating current (rms)

Compressor-Accumulated operating time

Compressor-Number of operation times

Discharge temperature (TH4)

Outdoor unit - Liquid pipe 1 temperature (TH3)

Outdoor unit - Liquid pipe 2 temperature

Outdoor unit-2-phase pipe temperature (TH6)

Outdoor unit-Outside air temperature (TH7)

Outdoor unit-Heat sink temperature (TH8)

Discharge super heat (SHd)

Sub-cool (SC)

19

20

Compressor-Operating frequency

Compressor-Target operating frequency

Outdoor unit-Fan output step

Outdoor unit-Fan 1 speed

(Only for air conditioners with DC fan motor)

Outdoor unit-Fan 2 speed

(Only for air conditioners with DC fan motor)

LEV (A) opening

LEV (B) opening

Primary current

DC bus voltage

32

33

34

35

Number of connected indoor units

Indoor unit-Setting temperature

Indoor unit-Intake air temperature <Measured by thermostat>

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

<Heat mode-4-deg correction>

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

<Heat mode-4-deg correction>

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

<Heat mode-4-deg correction>

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

<Heat mode-4-deg correction>

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

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

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

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

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

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

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

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

Thermostat ON operating time

Test run elapsed time

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

0 – 50

0 – 9999

0 – 9999

3 – 217

-40 – 90

-40 – 90

-39 – 88

-39 – 88

-40 – 200

0 – 255

0 – 130

0 – 255

0 – 255

0 – 10

0 – 9999

0 – 9999

0 – 500

0 – 500

0 – 50

180 – 370

0 – 4

17 – 30

8 – 39

8 – 39

8 – 39

8 – 39

8 – 39

-39 – 88

-39 – 88

-39 – 88

-39 – 88

-39 – 88

-39 – 88

-39 – 88

-39 – 88

0 – 999

0 – 120

A

10 hours

100 times

:

:

:

:

:

:

:

:

Hz

Hz

Step rpm rpm

Pulses

Pulses

A

V

Units

:

:

:

:

:

:

:

:

:

:

:

:

:

:

Minutes

Minutes

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

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

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

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

Not possible to activate maintenance mode during the test run.

81

OCH415A-3.qxp 08.2.21 8:14 AM Page 82

Request content

Description

(Display range)

Unit

78

79

80

81

74

75

76

77

82

83

70

71

72

73

66

67

68

69

62

63

64

65

58

59

60

61

54

55

56

57

50

51

52

53

Indoor unit-Control state

Outdoor unit-Control state

Compressor-Frequency control state

Outdoor unit-Fan control state

Actuator output state

Error content (U9)

Signal transmission demand capacity

Contact demand capacity

External input state (silent mode, etc.)

Outdoor unit-Capacity setting display

Outdoor unit-Setting information

Outdoor unit-SW1 setting information

Outdoor unit-SW2 setting information

Outdoor unit-SW4 setting information

Outdoor unit-SW5 setting information

Outdoor unit-SW6 setting information

Outdoor unit-SW7 setting information

Outdoor unit-SW8 setting information

Outdoor unit-SW9 setting information

Outdoor unit-SW10 setting information

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

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

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

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

0 – 255

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

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

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

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

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

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

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

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

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

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

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

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

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

84 M-NET adapter connection (presence/absence)

"0000": Not connected

"0001": Connected

85

86

87

88

96

97

98

99

92

93

94

95

89

90

91

Display of execution of replace/wash operation

Outdoor unit-Microcomputer version information

Outdoor unit-Microcomputer version information (sub No.)

"0000": Not washed

"0001": Washed

Examples) Ver 5.01

"0501"

Auxiliary information (displayed after version information)

Examples) Ver 5.01 A000

"A000"

100

101

102

Outdoor unit - Error postponement history 1 (latest)

Outdoor unit - Error postponement history 2 (previous)

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

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)

%

Code

Code

Code

Ver

82

Remarks

OCH415A-3.qxp 08.2.21 8:14 AM Page 83

Request content

Description

(Display range)

Unit Remarks

103

104

105

Error history 1 (latest)

Error history 2 (second to last)

Error history 3 (third to last)

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

106

Abnormal thermistor display

(TH3/TH6/TH7/TH8)

3 : TH3

6 : TH6

7 : TH7

107

108

109

Operation mode at time of error

Compressor-Operating current at time of error

110

111

112

113

Compressor-Accumulated operating time at time of error

Compressor-Number of operation times at time of error

Discharge temperature at time of error

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

114

115

116

117

118

119

120

Outdoor unit - Liquid pipe 2 temperature at time of error

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

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

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

Discharge super heat (SHd) at time of error

Sub-cool (SC) at time of error

Compressor-Operating frequency at time of error

121

Outdoor unit at time of error

• Fan output step

8 : TH8

0 : No thermistor error

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

0 – 50

0 – 9999

0 – 9999

3 – 217

-40 – 90

-40 – 90

-39 – 88

-39 – 88

-40 – 200

0 – 255

0 – 130

0 – 255

0 – 10

122

Outdoor unit at time of error

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

123

Outdoor unit at time of error

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

0 – 9999

0 – 9999

124

125

126

LEV (A) opening at time of error

LEV (B) opening at time of error

127

128

129

130 Thermostat ON time until operation stops due to error

131

132

Indoor - Liquid pipe temperature at time of error

0 – 500

0 – 500

0 – 999

-39 – 88

133

Indoor-2-phase pipe temperature at time of error

-39 – 88

134

Indoor at time of error

• Intake air temperature <Thermostat judge temperature>

135

136

137

138

139

140

~

146

147

148

149

150

151

152

Indoor-Actual intake air temperature

Indoor - Liquid pipe temperature

Indoor-2-phase pipe temperature

-39 – 88

-39 – 88

-39 – 88

-39 – 88

Code

Code

Code

Sensor number

A

10 hours

100 times

:

:

:

:

:

:

:

:

Hz

Step rpm rpm

Pulses

Pulses

Minutes

:

:

:

:

:

:

"0" is displayed if the air conditioner is a singlefan type.

Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).

Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).

83

OCH415A-3.qxp 08.2.21 8:14 AM Page 84

Request content

Description

(Display range)

Unit Remarks

153

154

155

Indoor-Fan operating time

(After filter is reset)

Indoor-Total operating time

(Fan motor ON time)

0 – 9999

0 – 9999

1 hour

10 hours

156

157

158

159

160

161

162

163

164

165

166

167

~

189

190

191

Indoor fan output value (Sj value)

Indoor fan output value

(Pulsation ON/OFF)

Indoor fan output value (duty value)

Indoor unit-Model setting information

Indoor unit-Capacity setting information

Indoor unit-SW3 information

Wireless pair No. (indoor control board side) setting

Indoor unit-SW5 information

0 – 255

"

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

Undefined

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

Undefined

Fan control data

00 **" "**" indicates fan control data.

"00 **" "**" indicates fan control data.

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

For indoor fan phase control

For indoor fan pulsation control

For indoor DC brushless motor control

767

Indoor unit-Microcomputer version information

Indoor unit-Microcomputer version information (sub No.)

Examples) Ver 5.01

"0501"

Auxiliary information (displayed after version information)

Examples) Ver 5.01 A000

"A000"

192

~

764

765

766

Stable operation (Heat mode)

Stable operation (Cool mode)

Stable operation cancellation

Ver

This request code is not provided to collect data. It is used to fix the operation state.

This request code is not provided to collect data. It is used to fix the operation state.

This request code is not provided to collect data. It is used to cancel the operation state that has been fixed by request codes "765" and "766".

84

OCH415A-3.qxp 08.2.21 8:14 AM Page 85

14-2-1. Detail Contents in Request Code

A

C

Example) Request code "004"

Discharge temperature 69 :

Refrigerant address "00"

B: Refrigerant address

C: Data display area

D: Request code display area

D

B

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

Data display

C 4

Operation mode

Display

0

C

H d

Operation mode

STOP • FAN

COOL • DRY

HEAT

Defrost

Relay output state

Operation mode

Relay output state

Display

Power currently supplied to compressor

7

8

A

5

6

3

4

0

1

2

ON

ON

Compressor Four-way valve Solenoid valve

– – –

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

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

Data display

Unit No. 4 state

Unit No. 3 state

Unit No. 2 state

Unit No. 1 state

Display

0

1

2

3

4

7

F

5

6

State

Normal

Preparing for heat operation

Heater is ON.

Anti-freeze protection is ON.

Overheat protection is ON.

Requesting compressor to turn OFF

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

0 0

Frequency control state

Display

0

1

2

1

Frequency control state

Frequency control state

Current limit control

No current limit

Primary current limit control is ON.

Secondary current limit control is ON.

2

1

Frequency control state

2

Display

Discharge temperature Condensation temperature overheat prevention overheat prevention

Anti-freeze protection control

Heatsink temperature overheat prevention d

E b

C

F

9

A

7

8

5

6

3

4

0

1

2

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

85

OCH415A-3.qxp 08.2.21 8:14 AM Page 86

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

Data display

0 0

Fan step correction value by heatsink temperature overheat prevention control

Fan step correction value by cool condensation temperature overheat prevention control

Display

- (minus)

0

1

2

Correction value

– 1

0

+1

+2

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

Data display

0 0

Actuator output state

1

Actuator output state

2

Actuator output state

1

SV1 Display

A b

8

9

E

F

C d

6

7

4

5

2

3

0

1 ON

ON

ON

ON

ON

ON

ON

ON

Four-way valve Compressor

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

Compressor is warming up

ON

ON

ON

ON

ON

ON

ON

ON

Actuator output state

2

52C Display

4

5

6

2

3

7

0

1 ON

ON

ON

ON

SV2

ON

ON

ON

ON

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

Data display

0 0

Error content

1

Error content

2

Error content

1

Display

Overvoltage error d

E b

C

F

9

A

7

8

5

6

3

4

0

1

2

Undervoltage error

L

1

-phase open error

: Detected

Power synchronizing signal error

Error content

2

Display

Converter Fo error

0

1

2

3

: Detected

PAM error

SS

ON

ON

ON

ON

86

OCH415A-3.qxp 08.2.21 8:14 AM Page 87

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

Data display

0 0 0

Setting content

Setting content

Display Setting value

0

1

2

3

0%

50%

75%

100%

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

Data display

0 0 0

Input state

SW7-1

Setting

SW7-2

ON

ON

ON

ON

Input state

Display

Contact demand Silent mode input input d

E b

C

F

9

A

7

8

5

6

3

4

0

1

2

Spare 1 input

: Input present

Spare 2 input

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

Data display

9

10

11

14

20

25

28

40

50

Capacity

35

50

60

71

100

125

140

200

250

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

Data display

0 0

Setting information

Setting information

1

2

Setting information

1

Display Defrost mode

0

1

Standard

For high humidity

Setting information

2

Single-/

Display

3-phase

0

1

2

3

Single-phase

3-phase

Heat pump/ cooling only

Heat pump

Cooling only

Heat pump

Cooling only

87

OCH415A-3.qxp 08.2.21 8:14 AM Page 88

0: Swich OFF 1: Swich ON

SW1, SW2, SW6, SW7

1 2 3 4 5 6

0 0 0 0 0 0

1 0 0 0 0 0

0 1 0 0 0 0

1 1 0 0 0 0

0 0 1 0 0 0

1 0 1 0 0 0

0 1 1 0 0 0

1 1 1 0 0 0

0 0 0 1 0 0

1 0 0 1 0 0

0 1 0 1 0 0

1 1 0 1 0 0

0 0 1 1 0 0

1 0 1 1 0 0

0 1 1 1 0 0

1 1 1 1 0 0

0 0 0 0 1 0

1 0 0 0 1 0

0 1 0 0 1 0

1 1 0 0 1 0

0 0 1 0 1 0

1 0 1 0 1 0

0 1 1 0 1 0

1 1 1 0 1 0

0 0 0 1 1 0

1 0 0 1 1 0

0 1 0 1 1 0

1 1 0 1 1 0

0 0 1 1 1 0

1 0 1 1 1 0

0 1 1 1 1 0

1 1 1 1 1 0

0 0 0 0 0 1

1 0 0 0 0 1

0 1 0 0 0 1

1 1 0 0 0 1

0 0 1 0 0 1

1 0 1 0 0 1

0 1 1 0 0 1

1 1 1 0 0 1

0 0 0 1 0 1

1 0 0 1 0 1

0 1 0 1 0 1

1 1 0 1 0 1

0 0 1 1 0 1

1 0 1 1 0 1

0 1 1 1 0 1

1 1 1 1 0 1

0 0 0 0 1 1

1 0 0 0 1 1

0 1 0 0 1 1

1 1 0 0 1 1

0 0 1 0 1 1

1 0 1 0 1 1

0 1 1 0 1 1

1 1 1 0 1 1

0 0 0 1 1 1

1 0 0 1 1 1

0 1 0 1 1 1

1 1 0 1 1 1

0 0 1 1 1 1

1 0 1 1 1 1

0 1 1 1 1 1

1 1 1 1 1 1

Data display

00 32

00 33

00 34

00 35

00 36

00 37

00 38

00 39

00 2A

00 2B

00 2C

00 2D

00 2E

00 2F

00 30

00 31

00 22

00 23

00 24

00 25

00 26

00 27

00 28

00 29

00 1A

00 1B

00 1C

00 1D

00 1E

00 1F

00 20

00 21

00 3A

00 3B

00 3C

00 3D

00 3E

00 3F

00 0b

00 0C

00 0d

00 0E

00 0F

00 10

00 11

00 12

00 13

00 14

00 15

00 16

00 17

00 18

00 19

00 00

00 01

00 02

00 03

00 04

00 05

00 06

00 07

00 08

00 09

00 0A

0: Swich OFF

SW5

1 2 3 4

0 0 0 0

1 0 0 0

0 1 0 0

1 1 0 0

0 0 1 0

1 0 1 0

0 1 1 0

1 1 1 0

0 0 0 1

1 0 0 1

0 1 0 1

1 1 0 1

0 0 1 1

1 0 1 1

0 1 1 1

1 1 1 1

1: Swich ON

Data display

00 00

00 01

00 02

00 03

00 04

00 05

00 06

00 07

00 08

00 09

00 0A

00 0b

00 0C

00 0d

00 0E

00 0F

0: Swich OFF 1: Swich ON

SW8

1 2 3

Data display

0 0 0

1 0 0

0 1 0

1 1 0

0 0 1

1 0 1

0 1 1

1 1 1

00 00

00 01

00 02

00 03

00 04

00 05

00 06

00 07

0: Swich OFF 1: Swich ON

SW4, SW9, SW10

1 2

Data display

0

1

0

1

0

0

1

1

00 00

00 01

00 02

00 03

88

OCH415A-3.qxp 08.2.21 8:14 AM Page 89

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

Data display

0 0

See the table on the right.

Display Model setting state

PSA-RP•GA, PSH-PGAH

15

16

17

18

19

1A

0F

10

11

12

13

14

1b

1C

1d

1E

1F

07

08

09

0A

0b

0C

0d

0E

00

01

02

03

04

05

06

PEAD-RP•EA(2)/GA, PEHD-P•EAH

SEZ-KA•VA

SLZ-KA•VA(L)

PCA-RP•HA

PEA-RP•EA

MEXZ-GA•VA(L)

Display

35

36

37

38

39

3A

2F

30

31

32

33

34

3b

3C

3d

3E

3F

27

28

29

2A

2b

2C

2d

2E

20

21

22

23

24

25

26

Model setting state

PKA-RP•FAL, PKH-P•FALH

PCA-RP•GA, PCH-P•GAH, PLA-RP•BA

PKA-RP•GAL, PKH-P•GALH

PLA-RP• AA

PLH-P•AAH

PLA-RP•AA2

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

Data display

0 0

See the table on the right.

Display

0b

0C

0d

0E

0F

07

08

09

0A

03

04

05

06

00

01

02

Capacity setting state

63

71

80

90

100

40

45

50

56

12

16

22

25

28

32

35, 36

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

Data display

0 0

See the table on the right.

Display

00

01

02

03

Pair No. setting state

No. 0

No. 1 J41 disconnected

No. 2 J42 disconnected

No. 3 J41, J42 disconnected

Display

1b

1C

1d

1E

1F

17

18

19

1A

13

14

15

16

10

11

12

Capacity setting state

112

125

140

160

200

224

250

280

89

OCH415A-3.qxp 08.2.21 8:14 AM Page 90

15 DISASSEMBLY PROCEDURE

PUHZ-P100VHA2.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.

PHOTOS & ILLUSTRATION

Top panel fixing screws

Figure 1

Top panel

Slide

Service panel

Service panel fixing screws

Fan grille

Grill fixing screws

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.)

Nut

Photo 1

Front panel

Propeller

Photo 2

Fan motor fixing screws

Fan motor

(MF1)

Front panel fixing screws

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.

<Diagram symbol in the connector housing>

• 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.

Photo 3

Valve bed

Fan motor fixing screws

Electrical parts box

Cover panel fixing screws

Controller circuit board

(C.B.)

Electrical parts box fixing screw

Terminal block

(TB1)

Terminal cover

Compressor (MC)

Cover panel

(Front)

90

OCH415A-4.qxp 08.2.21 8:13 AM Page 91

OPERATING PROCEDURE

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

PHOTOS

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.

Photo 5

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>.

Lead wire of thermistor

<Outdoor>

(TH7)

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 6

Electrical parts box

Sensor holder

Clamp

Thermistor

<Discharge>

(TH4)

Thermistor

<Outdoor pipe>

(TH3)

91

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OPERATING PROCEDURE

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.

Photo 7

PHOTOS

4-way valve fixing screw

LEV coil (LEV A)

4-way valve

4-way valve

(21S4)

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 removing 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 8

LEV

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 removing 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.

92

LEV coil (LEV A)

4-way valve

OCH415A-4.qxp 08.2.21 8:13 AM Page 93

OPERATING PROCEDURE

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.

Photo 9

Lead wire of high pressure switch

PHOTOS

High pressure switch (63H)

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 10

Reactor fixing screw

Reactor

(DCL)

Reactor fixing screws

Electrical parts box

93

OCH415A-4.qxp 08.2.21 8:13 AM Page 94

OPERATING PROCEDURE

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.

Photo 11

Terminal cover

PHOTOS

Inlet

Note: Recover refrigerant without spreading it in the air.

Separator

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).

Separator fixing screw

Note: Recover refrigerant without spreading it in the air.

Outlet

Accumulator

Accumulator leg fixing screws

Soundproof cover for compressor

94

OCH415A-4.qxp 08.2.21 8:13 AM Page 95

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

1

.UK PUHZ-P140VHA2

1

.UK

OPERATING PROCEDURE PHOTOS & ILLUSTRATION

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.

Figure 1

Grille fixing screws

Top panel fixing screws

Slide

Top panel

Service panel

Fan grille

Grille fixing screws

Service panel fixing screws

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.)

Nut

Photo 1

Propeller

Front panel

Photo 2

Fan motor fixing screws

Fan motor

Fan motor fixing screws

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.

<Diagram symbol in the connector housing>

• 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 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.

Photo 3

Screw

Compressor

(MC)

Controller circuit board

(C.B.)

Electrical parts box

Electrical parts box fixing screw

Terminal block

(TB1)

Valve bed

Terminal cover

Cover panel

(Front)

Cover panel fixing screws

95

OCH415A-4.qxp 08.2.21 8:13 AM Page 96

OPERATING PROCEDURE

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

PHOTOS

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>.

Photo 5

Lead wire of thermistor

<Outdoor>

(TH7)

Photo 6 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.

Thermistor

<Discharge>

(TH4)

Electrical parts box

Sensor holder

Clamp

Compressor

(MC)

96

OCH415A-4.qxp 08.2.21 8:13 AM Page 97

OPERATING PROCEDURE

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.)

Photo 7

PHOTOS

LEV

[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.

Lead wire of high pressure switch

Thermistor

<Outdoor pipe>

(TH3)

High pressure switch

LEV coil (LEV A)

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 removing 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.

Bypass valve coil (SV)

Bypass valve coil fixing screw

4-way valve coil

(21S4)

4-way valve

4-way valve coil fixing screw

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 removing 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.

97

OCH415A-4.qxp 08.2.21 8:42 AM Page 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.

Photo 8

PHOTOS

Lead wire of high pressure switch

High pressure switch

LEV

LEV coil (LEV A)

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.

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.

Bypass valve coil (SV)

Bypass valve coil fixing screw

4-way valve coil

(21S4)

4-way valve

4-way valve coil fixing screw

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.

Photo 9

Reactor fixing screw

Reactor

(DCL)

Reactor fixing screws

Electrical parts box

98

OCH415A-4.qxp 08.2.21 8:13 AM Page 99

OPERATING PROCEDURE

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.

Photo 10

Terminal cover

Compressor

(MC)

Note: Recover refrigerant without spreading it in the air.

PHOTOS

Accumulator

Compressor fixing nut

Accumulator leg fixing screws

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.

99

OCH415A-4.qxp 08.2.21 8:13 AM Page 100

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

C

Copyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.

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 Feb. 2008

Specifications subject to change without notice

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