Mitsubishi PUHZ-SP100YKA, PUHZ-SP125VKA.TH, PUHZ-SP125YKA, PUHZ-SP125YKA.TH, PUHZ-SP140YKA.TH Service Manual

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SERVICE MANUAL

No.OCH671

SPLIT-TYPE AIR CONDITIONERS

R410A

September 2017

PARTS CATALOG (OCB671)

CONTENTS

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

2. SAFETY PRECAUTION ···························· 2

3. SPECIFICATIONS ··································· 6

4. DATA ····················································7

5. OUTLINES AND DIMENSIONS ················ 10

6. WIRING DIAGRAM ································ 11

7. WIRING SPECIFICATIONS ····················· 13

REFRIGERANT SYSTEM DIAGRAM

·········· 18

9. TROUBLESHOOTING ···························· 20

10. FUNCTION SETTING ····························· 77

11.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

····89

12. EASY MAINTENANCE FUNCTION ··········· 99

13. DISASSEMBLY PROCEDURE ················103

Outdoor unit [Model Name]

PUHZ-SP125VKA

PUHZ-SP140VKA

PUHZ-SP100YKA

PUHZ-SP125YKA

PUHZ-SP140YKA

[Service Ref.]

PUHZ-SP125VKA.TH PUHZ-SP140VKA.TH PUHZ-SP100YKA.TH PUHZ-SP125YKA.TH PUHZ-SP140YKA.TH

OCH671

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

INDOOR UNIT SERVICE MANUAL

Model name Service Ref.

Service Manual No.

PLA-SM71/100/125/140EA* PLA-SM71/100/125/140EA.UK

OCH683 OCB683

PEAD-SM71/100/125/140JA(L) PEAD-SM71/100/125/140JA(L).UK —

* These models will be released on Dec/2017.

SAFETY PRECAUTION

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

Preparation before the repair service.

• Prepare the proper tools.

• Prepare the proper protectors.

• Provide adequate ventilation.

• After stopping the operation of the air conditioner, turn off the power-supply breaker.

• Discharge the condenser before the work involving the electric parts.

Precautions during the repair service.

• Do not perform the work involving the electric parts with wet hands.

• Do not pour water into the electric parts.

• Do not touch the refrigerant.

• Do not touch the hot or cold areas in the refrigerating cycle.

• When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution

not to touch the live parts.

REFERENCE MANUAL

OCH671

[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) If moisture or foreign matter might have entered the refrigerant piping during the service, ensure to remove them.

[2] Additional refrigerant charge

When charging directly from cylinder

(1) Check that cylinder for R410A on the market is syphon type. (2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Electronic weighing scale

Unit

Make sure that the inside and outside of refrigerant piping is clean and it has no contaminants such as sulfur, oxides, dirt, shaving particles, etc, which are hazard to refrigerant cycle. In addition, use pipes with specified thickness.

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

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

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

The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount.

If large amount of mineral oil enters, that 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.

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.

Use new refrigerant pipes.

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

• 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.

Handle 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.

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

The following tools are necessary to use R410A refrigerant.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

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

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

Use the specified refrigerant only.

OCH671

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

(1) Flowchart

[3] Service tools

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

No. Tool name Specifications

Gauge manifold • Only for R410A

• Use the existing fitting

specifications

. (UNF1/2)

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

Charge hose • Only for R410A

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

Electro

nic weighing s

cale

—

Gas leak detector

• Use the detector for R134a, R407C or R410A.

Adaptor for reverse flow check

• Attach on vacuum pump.

Refrigerant charge base

—

Refrigerant cylinder • Only for R410A · Top of cylinder (Pink)

• Cylinder with syphon

Refrigerant recovery equipment

—

Perform the airtight test, vacuum air purging, additional refrigerant charging (if necessary), and gas leak check.

• Refer to the owchart below to determine if the existing pipes can be used and if it is necessary to use a lter dryer.

• If the diameter of the existing pipes is different from the specied diameter, refer to technological data materials to conrm if

the pipes can be used.

▼

Measure the existing pipe thickness and check for damage.

The existing pipe thickness meets specications and the pipes are not damaged.

Check if the existing air conditioner can operate.

After operating the cooling system for about 30 minutes, do a pump down work.

Disconnect the existing air conditioner from the pipes.

Attach the new air conditioner

Test run

The existing pipes cannot be reused. Use new pipes.

Note: If the existing air conditioner cannot operate, use a refrigerant recovery device to collect the refrigerant.

Note: In case existing pipes were used for gas or oil heat pump systems, be sure to clean the pipes.

The existing pipe thickness does not meet

specications or the pipes are damaged.

OCH671

(2) 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 times 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 0.7 mm or below.)

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

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

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

6.35

9.52

12.70

15.88

19.05

0.8

1.0

—

0.8

1.0

Nominal

dimensions(inch)

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22

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

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions(inch)

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22

(mm)

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

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0 *

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions(inch)

Flare nut dimensions

Outside

diameter

Dimension B

R410A

* 36.0mm for indoor unit

R22

(mm)

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve

Vacuum pump

Flare tool

Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermistor vacuum gauge and vacuum valve Charging cylinder

Air purge, refrigerant charge and operation check Gas leak check Refrigerant recovery Refrigerant charge Apply to flared section

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes Refrigerant charge Check the degree of vacuum. (Vacuum valve prevents back flow of oil and refrigerant to thermistor vacuum gauge) Refrigerant charge

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

Tool exclusive for R410A

Tools for other refrigerants can be used if equipped with adapter for reverse flow check Tools for other refrigerants can be used by adjusting flaring dimension Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used

Tool exclusive for R410A

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

(Usable if equipped with adapter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped with adapter 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.

Dimension A

Dimension B

OCH671

3 SPECIFICATIONS

Service Ref

PUHZ-SP125VKA.TH

PUHZ-SP140VKA.TH

PUHZ-SP100YKA.TH

PUHZ-SP125YKA.TH

PUHZ-SP140YKA.TH

Power supply (phase,cycle,voltage)

Single phase, 50 Hz, 230 V 3-phase, 50 Hz, 400 V

Max. current A 26.5 30 11.5 11.5 11.5 External nish Munsell 3Y 7.8/1.1 Refrigerant control Linear Expansion Valve Compressor Hermetic

Model

MNB33FBDMC-L MNB33FBDMC-L SNB220GBAMT MNB33FBDMC-L MNB33FBDMC-L Motor output kW 2.5 2.5 1.5 2.5 2.5 Starter type Direct input Protection devices Shell thermistor

H.P. switch Heat exchanger Plate n coil Fan Fan(drive) x No. Propeller fan x 1

Fan motor output

kW 0.200

Air volume

/min

87 87 79 87 87

Noise level

Cooling

SPL(db)

54 56 51 54 56

Heating

SPL(db)

56 57 54 56 57

Cooling

SPL(db)

72 75 70 72 75

Dimensions W

mm(inch)

1,050 (41-5/16)

mm(inch)

330+25 (13+1)

mm(inch)

981 (38-5/8) Weight kg 84 84 78 85 85 Refrigerant R410A

Charge kg 3.8 3.8 3.3 3.8 3.8 Oil (Model) cc 1100 (FV50S) 1100 (FV50S) 700 (FV50S) 1100 (FV50S) 1100 (FV50S)

REFRIGERANT PIPING

Pipe size O.D Liquid

mm(inch)

9.52 (3/8)

Gas

mm(inch)

15.88 (5/8)

Connection method

Indoor side Flared Outdoor side Flared

Between the indoor & Outdoor unit

Height difference

Maximum 30 m

Piping length

Maximum 40 m

Maximum 30 m

Maximum 40 m

OCH671

4 DATA

4-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

0.88

0.95

MNB33FBDMC-L

PUHZ-SP125/140VKA.TH

Service Ref.

Compressor model

(at 20°C)

U-V

U-W

W-V

Winding

Resistance

( " )

PUHZ-SP125/140YKA.TH

PUHZ-SP100YKA.TH

SNB220FBAMT

Service Ref.

Piping length (one way)

Initial

charged

30m 40m

PUHZ-SP125VKA.TH

0 0.6

3.8

PUHZ-SP140VKA.TH

PUHZ-SP100YKA.TH 3.3

PUHZ-SP125YKA.TH

3.8

PUHZ-SP140YKA.TH

4-2. COMPRESSOR TECHNICAL DATA

OCH671

4-3. NOISE CRITERION CURVES

1.5m

MICROPHONE

UNIT

GROUND

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

COOLING

HEATING

MODE

54 56

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

COOLING

HEATING

MODE

56 57

SPL(dB)

LINE

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR

COOLING

HEATING

MODE

51 54

SPL(dB)

LINE

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH

PUHZ-SP125YKA.TH

PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

OCH671

4-4. STANDARD OPERATION DATA

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

Representative matching PUHZ-SP100 PUHZ-SP125 PUHZ-SP140 Mode COOLING HEATING COOLING HEATING COOLING HEATING Total Capacity W 9.4 11.2 12.1 13.5 13.6 15.0

input kW 3.29 3.48 4.23 4.18 5.63 4.81

Electrical circuit

Indoor PLA-SM100EA.UK PLA-SM125EA.UK PLA-SM140EA.UK Phase, Hz 1, 50 1, 50 1, 50 Voltage V 230 230 230 Current A 0.46 0.44 0.66 0.64 0.66 0.64 Outdoor PUHZ-SP100YKA PUHZ-SP125VKA

PUHZ-SP125YKA

PUHZ-SP140VKA

PUHZ-SP140YKA Phase, Hz 1, 50 3, 50 1, 50 3, 50 1, 50 3, 50 Voltage V

230 400 230 400 230

400

Current A 14.0/5.0 14.0/5.0 18.0/6.5 17.5/6.5 23.5/9.0 20.5/7.5

Refrigerant circuit

Discharge Pressure MPa 2.79 2.68 3.00 2.62 3.21 2.78 Suction pressure MPa 0.86 0.68 0.85 0.65 0.77 0.62 Discharge temperature

77.9 78.5 76.7 69.7 88.1 72.6

Condensing temperature

47.0 45.3 49.9 44.6 53.2 47.0

Suction temperature

12.6 3.0 7.5 −0.8 7.9 −2.0

Ref. pipe length m 7.5 7.5 7.5

Indoor side

Intake air temperature

27 20 27 20 27 20

19 14 19 14 19 14

Discharge air temperature

13.5 39.9 12.2 42.1 11.3 44.3

Outdoor side

Intake air DB

35 7 35 7 35 7

temperature WB

24 6 24 6 24 6 SHF 0.77 — 0.73 — 0.70 — BF 0.24 — 0.15 — 0.14 —

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH PUHZ-SP125YKA.TH PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

OCH671

5 OUTLINES AND DIMENSIONS

Unit: mm

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH PUHZ-SP125YKA.TH PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

OCH671

PUHZ-SP125VKA.TH PUHZ-SP140VKA.TH

Terminal Block <Power Supply, Indoor/Outdoor> Motor for Compressor Fan Motor High Pressure Switch Thermistor <Liquid> Thermistor <Discharge> Thermistor <2-Phase Pipe> Thermistor <Ambient> Thermistor <Heat Sink> Thermistor <Comp. Surface> Linear Expansion Valve

21S4 DCL1, DCL2, DCL3 CY1, CY2 CX1 P.B. C.B.

F1, F2, F3, F4 SW1

SW4 SW5

Solenoid Valve (4-Way Valve) Reactor Capacitor Capacitor Power Circuit Board Controller Circuit Board Fuse <T6.3AL250V> Switch

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

Switch

SW6 SW7 SW8 SW9 SWP CN31 CN51 CNDM CNM X52

Switch

<Model Select> Switch <Function Switch> Switch <Function Switch> Switch <Function Switch> Switch <Pump Down> Connector <Emergency Operation> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Relay

SYMBOL TB1 MC MF1 63H TH3 TH4 TH6 TH7 TH8 TH33 LEV-A, LEV-B

SYMBOL SYMBOLNAME NAME NAME

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

SW6-4, 5, 6, 7, 8 *2

MODEL

125V

140V

The black square (■) indicates a switch position.

*1. MODEL SELECT

*2. SW6-1 to 3: Function switch

P. B.

CN6

(WH)

t°

1 2

CN4

(WH)

1 2

TH8

IC600

CNDC

(PK)

1 3

CNAC2

(RD)

CNAC1

(WH)

LI NI

1 3 1 3

IC500

E3E4 EI E2

CN2 (RD)

TB3B

TB1B

TB2B

TB1A

TB2A

TB3A

BK WH RD RD BKWH

DCL1

DCL2

DCL3

C. B.

TH6TH7 TH4TH3

t° t° t° t°

LEV-A

CNS (WH)

CNAC

(WH)

CNDC

(PK)

TH7/6

(RD)

TH3 (WH)

TH4

(WH)

TRANS

CNVMNT

(WH)

CNMNT

(WH)

63H

(YE)

1 4 1 2 2 1

1 3

31 1

1 2

LEV-A

(WH)

21S4

(GN)

MF1

CNF1 (WH)

63H

LEV-B

(RD)

LEV-B

CNDM

(WH)

CN51

(WH)

TH33

(YE)

TH33

t°

When M-NET Adapter is connected

CN2M

(WH)

CN5

(WH)

CND (WH)

M-NET

M-NET ADAPTER

3 5

CNM (WH)

1 14

LED1

LED2

21S4

TB7

A B S

X52

L N S1 S2 S3

POWER SUPPLY ~/N 230V 50Hz

TB1

GNYE

TO INDOOR

UNIT

CY1

CY2

CX1

CN2 (RD)

CN4

(WH)

1 7

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.

SW5SW8SWP

SW4

SW1 SW6

SW9 SW7

CN31

WIRING DIAGRAM

OCH671

PUHZ-SP100YKA.TH PUHZ-SP125YKA.TH PUHZ-SP140YKA.TH

Terminal Block <Power Supply> Terminal Block <Indoor/Outdoor> Motor for Compressor Fan Motor High Pressure Switch Thermistor <Liquid> Thermistor <Discharge> Thermistor <2-Phase Pipe> Thermistor <Ambient> Thermistor <Heat Sink> Thermistor <Comp. Surface> Linear Expansion Valve

21S4 ACL4 DCL RS CY1, CY2 P.B. N.F. C.B.

Solenoid Valve (4-Way Valve) Reactor Reactor Resistor Capacitor Power Circuit Board Noise Filter Circuit Board Controller Circuit Board Fuse <T6.3AL250V> Switch

<Manual Defrost, Defect History Record Reset, Refrigerant Address> Switch <Function Switch>

SW5 SW6 SW7 SW8 SW9 SWP CN31 CN51 CNDM CNM X52

F1, F2, F3, F4 S

SW4

Switch

Switch

SYMBOL TB1 TB2 MC MF1 63H TH3 TH4 TH6 TH7 TH8 TH33 LEV-A, LEV-B

SYMBOL SYMBOLNAME NAME NAME

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

SW6-4, 5, 6, 7, 8 *2

MODEL

100Y

1 2 3 4 5 6 7 8

OFF

125Y

140Y

The black square (■) indicates a

switch position.

*1. MODEL SELECT

*2. SW6-1 to 3: Function switch

P.B.

POWER SUPPLY 3N~

400V 50Hz

TB1

RDWHBK

N.F.

CNAC1

(WH)

CNDC

(PK)

CNL

(BU)

CNAC2 (RD)

CNCT (RD)

1 2

LO1

LO2

LO3

LI1

LI2

LI3

TB2

GNYE

21S4

(GN)

21S4

X52

BKBK

TO INDOOR

UNIT

1 2

CN6

(WH)

1 2 CN5 (RD)

CN2 (RD)

1 7 1 2

CN4 (WH)

TB-U

TB-V

TB-W

L3IN

TB-L2

TB-L1

TH8

t°

CY1

CY2

C. B.

TH6TH7 TH4

t° t° t°

CNS

(WH)

CNAC

(WH)

CNDC

(PK)

CN2 (RD)

CN4

(WH)

TH7/6

(RD)

TH4 (WH)

TRANS

CNVMNT

(WH)

CNMNT

(WH)

63H (YE)

1 4 2 1

TH3

t°

TH3

(WH)

1 2

1 3

31 1

1 2

MF1

CNF1

(WH)

63H

LEV-B

(RD)

LEV-B

LEV-A

(WH)

LEV-A

CNDM

(WH)

CN51 (WH)

1 3 TH33

(YE)

TH33

t°

When M-NET adapter is connected

CN2M (WH)

CN5

(WH)

CND

(WH)

M-NET

M-NET ADAPTER

TB7

A B S

3 5

CNM (WH)

1 14

LED1

LED2

TB-L3

X52CB

L3OUT

DCL

X52CA

TB-P1

TB-P3

ACL4

SW5SW8SWP

SW4

SW1 SW6

SW9 SW7

CN31

RD RD

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.

OCH671

7 WIRING SPECIFICATIONS

1 2

S1 S2 S3

Indoor/outdoor unit connection cable

Indoor unit

Unit power supply

Outdoor unit

Remote controller

B Earth leakage breaker C wiring circuit breaker or

isolating switch

1:1 system Electrical wiring

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

2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.

3. Install an earth line longer than power cables.

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.

(Design 60245 IEC 57)

A-Control

Outdoor Unit

3 poles isolator

Power supply

Isolator

A-Control

Indoor Unit

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a re or communication failure.

7-1. FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model PUHZ-SP125VKA PUHZ-SP140VKA PUHZ-SP100/125/140YKA

Outdoor unit power supply ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V

3N~ (3 ph 4-wires), 50 Hz, 400 V

Outdoor unit input capacity Main switch (Breaker) *1 32 A 40 A 16 A

Wiring Wire

No. × size

(mm

)

Outdoor unit power supply 3 × Min. 4 3 × Min. 6 5 × Min. 1.5

Indoor unit-Outdoor unit *2 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar)

Indoor unit-Outdoor unit earth *2 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5

Remote controller-Indoor unit *3 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar) 2 × 0.3 (Non-polar)

Circuit rating

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

*4 230 V AC 230 V AC 230 V AC

Indoor unit-Outdoor unit S1-S2 *4 230 V AC 230 V AC 230 V AC

Indoor unit-Outdoor unit S2-S3 *4 24 V DC 24 V DC 24 V DC

Remote controller-Indoor unit *4 12 V DC 12 V DC 12 V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV). Make sure that the current leakage breaker is one compatible with higher harmonics.

Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter. The use of an inadequate breaker can cause the incorrect operation of inverter.

*2. Max. 45 m

If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m

• Use one cable for S1 and S2 and another for S3 as shown in the picture.

• Max. 50 m Total Max. for PEY. Wiring size 3 × 1.5 (Polar).

*3. The 10 m wire is attached in the remote controller accessory.

*4. The gures 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.

Caution: Be sure to install N-Line. Without N-Line, it could cause damage to the unit.

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7-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

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

1:1 System

The optional indoor power supply terminal kit is required.

S1 S2

1 2

S1 S2 S3

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

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

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 referring to the figure in the right and the DIP switch settings of the outdoor unit control board.

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

Electric heater (For models with heater)

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

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

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

Connectors

Indoor unit

control board

Separate indoor unit/outdoor unit power supplies

Electric heater (For models with heater)

BLUE

YELLOW

CND

CN01

ORANGE

CN01

ORANGE

YELLOW

BLUE

YELLOW

CND

Indoor unit

control board

Note:

There are 3 types of labels (labels A, B, and C). Affix the appropriate labels to the units according to the wiring method.

ON OFF

Set the SW8-3 to ON.

1 2 (SW8)

Simultaneous twin system

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

The optional indoor power supply terminal kit is required.

A B C D E F G H J

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

Indoor unit earth

D G

K K

B C B C

*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV). The breaker shall be provided to ensure disconnection of all active phase conductor of the supply. *2. Max. 120 m *3. Max. 500 m (Max. 200 m when 2 remote controllers are used) *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 cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable. (Design 60245 IEC 57)

3. Install an earth line longer than power cables.

Indoor unit model Indoor unit power supply Indoor unit input capacity

Main switch (Breaker)

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

Indoor unit-Outdoor unit earth Remote controller-Indoor unit

Indoor unit L-N *4

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

71–140

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

16 A

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

–

2 o 0.3 (Non-polar)

230 V AC

– 24 V DC 12 V DC

Circuit

rating

Wiring

Wire No. o size

(mm

)

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7-3. INDOOR – OUTDOOR CONNECTING CABLE

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

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

Indoor unit-Outdoor unit

Outdoor power supply

Max. 45m

3 o 1.5 (polar)

1 o Min. 1.5

Max. 50m

3 o 2.5 (polar)

1 o Min. 2.5

Indoor unit-Outdoor unit earth

Wire No. o Size (mm²)

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.

Indoor unit-Outdoor unit

Indoor/Outdoor separate power supply

Max. 120m

2 o Min. 0.3

—

Indoor unit-Outdoor unit earth

Wire No. o Size (mm²)

Note: The optional indoor power supply terminal kit is necessary

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7-4. M-NET WIRING METHOD

(Points to note) (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 5 cm. Do not put them in the same conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 220–240 V power supply. If it is connected,

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

(3) Use 2-core × 1.25mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

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

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

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

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

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

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

In case of single spot earthing, noise does not enter into the shield wire because the earth wire and shield wire do not form

1 circuit.

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

installation manual.

Group remote controller

Refrigerant address 00

M-NET address 01

A-control remote

controller

A-control remote

controller

A-control remote

controller

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

Power supply unit for transmission wire

Central remote controller

M-NET transmission wire

Bad example (Multi spot earthing of shield wire)

Good example 1 (Single spot earthing of shield wire)

Power supply appliance

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Good example 2 (Single spot earthing of shield wire)

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7-4-3. Regulations in address settings

In the 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.

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

Note: 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”.

7-4-1. M-NET address setting

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

Address number can be set by using rotary switches (SW11 for 1st digit and SW12 for 2nd digit), which is located on the M-NET board of outdoor unit. (Initial setting: all addresses are set to “0”.)

7-4-2. Refrigerant address setting

In the case of multiple grouping system (multiple refrigerant circuits in 1 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”.)]

1 2

M-NET Address No.

Switch setting

SW11 1st digit

SW12 2nd digit

OFF

Refrigerant address

OFF

System controller

A-control remote controller

Group A Group B Group C

A-control remote controller

TB5

A-control remote controller

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 01

M-NET address 03

Refrigerant address 00

M-NET address 04

Power supply unit for transmission wire

A-control remote controller

TB5

Group A Group B

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

System controller

Power supply unit for transmission wire

M-NET wiring

(1) Use 2-core × 1.25mm² shield wire for electric wires. (Excluding the case connecting to system controller.) (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission

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

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

S) on M-NET terminal block should be individually wired to the other 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 earth wire on the plate as shown on the right figure.

Transmission

wire

Shield part

M-NET terminal block

Earth wire

A B S

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8 REFRIGERANT SYSTEM DIAGRAM

Unit : mm (inch)

Thermistor (TH8) <Heat Sink>

Refrigerant LIQUID pipe connection [9.52 (3/8)

Stop valve (with charge plug)

Strainer #100

Power receiver

LEV-A

Strainer #100

High pressure switch 63H

Thermistor TH4 (Discharge)

Thermistor TH33 (Comp. surface)

Compressor

Strainer #50

Strainer #100

4-way valve

Muffler

Charge plug

Stop valve

Refrigerant GAS pipe

connection [15.88 (5/8)

Refrigerant flow in cooling

Refrigerant flow in heating

Heat exchanger

Thermistor TH6 (Condenser)

Thermistor TH7 (Ambient)

Thermistor TH3 (Liquid)

Distributor

LEV-B

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH PUHZ-SP125YKA.TH PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

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8-2. 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) can be set up.

1 Turn on SW4-1 to start test run. 2 Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is no problem with product

because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor starts operating, but this

is no problem with product because the check valve itself, generates the sound because pressure difference is small in the refrigerant circuit.

8-1. REFRIGERANT COLLECTING (PUMP DOWN)

When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrigerant is released into the atmosphere.

1 Turn off the power supply (circuit breaker). 2 Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit. 3 Close the liquid stop valve completely. 4 Supply power (circuit breaker).

● When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

● Startup of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the

pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on.

5 Perform the refrigerant collecting operation (cooling test run).

● Push the pump-down SWP switch (push-button type) on the control board of the outdoor unit. The compressor and ventilators (indoor and outdoor units) start operating (refrigerant collecting operation begins). (LED1 and LED2 on the control board of the outdoor unit are lit.)

● Only push the pump-down SWP switch if the unit is stopped. However, even if the unit is stopped and the pump-down SWP

switch is pushed less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed. Wait until the compressor has been stopped for 3 minutes and then push the pump-down SWP switch again.

6 Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows 0.05

to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²) and quickly stop the air conditioner.

● Because the unit automatically stops in about 3 minutes when the refrigerant collecting operation is completed (LED1 off,

LED2 lit), be sure to quickly close the gas stop valve. However, if LED1 is lit, LED2 is off, and the unit is stopped, open the liquid stop valve completely, close the valve completely after 3 minutes or more have passed, and then repeat step 5. (Open the gas stop valve completely.)

● If the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the

power supply is turned off.

● Note that when the extension piping is very long with a large refrigerant amount, it may not be possible to perform a pump-

down operation. In this case, use refrigerant recovery equipment to collect all of the refrigerant in the system.

7 Turn off the power supply (circuit breaker), remove the gauge manifold, and then disconnect the refrigerant pipes.

Warning:

When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.

• If the refrigerant pipes are disconnected while the compressor is operating and the stop valve is open, the pressure in

the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst, personal injury, etc.

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9 TROUBLESHOOTING

Present and past check codes are logged, and they can be 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 in the field, are summarized in the table below. Check the contents below before investigating details.

9-1. TROUBLESHOOTING

Unit conditions at service

Check code

Actions to be taken for service (summary)

The trouble is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “9-4. SELF-DIAGNOSIS ACTION TABLE”.

Conduct trouble shooting and ascertain the cause of the trouble according to “9-5. TROUBLESHOOTING OF PROBLEMS”.

The trouble is not reoccurring.

Logged

Not logged

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

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

trouble

according to “9-5. TROUBLESHOOTING

PROBLEMS”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality concerning of parts such as electrical component, controller board, remote controller, etc.

9-2. CHECK POINT UNDER TEST RUN

9-2-1. Before test run

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

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500 V Megger

and check that it is 1.0M" or over.

* Do not use 500 V 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 require higher ceiling settings or auto-recovery feature from power failure, make proper changes of

settings referring to the description of “10. FUNCTION SETTING”.

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

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F1 F2 F3 F4

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Test run Input maintenance info. Function setting Check Self check

F1 F2 F3 F4

Test run menu

Cursor

Service menu:

Test run Drain pump test run

Select "Service" from the Main menu, and press the button.

Select "Test run" with the F1 or F2 button, and press the button.

Select "Test run" with the F1

or F2 button, and press the button.

F1 F2 F3 F4

Cool

Pipe

Auto

Switch disp.

Mode Fan

RemainTest run

F1 F2 F3 F4

Remain

Vane

Check the auto vane with the F1 F2 buttons.

Press the

button to return to “Test run operation”.

Press the

button.

When the test run is completed, the “Test run menu” screen will appear. * The test run will automatically stop after two hours.

Test run operation

Auto vane check

Press the button and open the Vane setting screen.

Function buttons

F1 F2 F3 F4

MENU RETURN SELECT ON/OFF

9-2-2. Test run for wired remote controller

<PAR-3xMAA("x" represents 0 or later)>

* Check the operation of the outdoor unit’s fan.

Cool mode: Check the cold air blows out. Heat mode: Check the heat blows out.

Press the F1

button to go through the operation modes in the order of "Cool

and Heat".

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F1 F2 F3 F4

Error information

Error code Error unit IU Ref. address Unt# Model name Serial No.

ResetPage

Error information

Contact information Dealer Tel

ResetPage

Reset error: Reset button

blinks

Check code, error unit, refrigerant address, unit model name, and serial number will appear.

The model name and serial number will appear only if the information have been registered.

Press the

button to go to the next page.

When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer.

Contact information (dealer's phone number) will appear if the information have been registered.

F1 F2 F3 F4

Error information

Error reset

Error code Error unit IU Ref. address Unt# Model name Serial No.

ResetPage

Reset current error?

Error reset

OKCancel

Main menu:

Reset error: Reset button

blinks

Press the

button or the button to reset the error that is occurring.

Errors cannot be reset while the ON/OFF operation is prohibited.

Select "OK" with theF4button.

Navigating through the screens

• To go back to the Main menu ..........

button

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F1 F2 F3 F4

Main

Main display:

Cursor Page

Main menu

Restriction Energy saving Night setback Filter information Error information

blinks

While no errors are occurring, page 2/2 of the error information can be viewed by selecting "Error information" from the Main menu. Errors cannot be reset from this screen.

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Test run Input maintenance info. Function setting Check Self check

Check menu

Cursor

Service menu:

Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Request code

F1 F2 F3 F4

Error history

Page

Delete

Check menu:

Error Unt#

dd/mm/yy

Error history

Cancel OK

Delete error history?

Error history

Check menu:

Error history deleted

Select "Error history" with the F1 or F2 button, and press the button.

Select "Check" with the F1

or F2 button, and press the button.

Select "Error history" from the Check menu, and press the button to view up to 16 error history records.

Four records are shown per page, and the top record on the rst page

indicates the latest check code record.

Error history

To delete the error history, press the F4 button (Delete) on the screen that shows error history.

A conrmation screen will appear asking if you want to delete the error history.

Press the F4

button (OK) to delete the history.

"Error history deleted" will appear on the screen.

Press the

button to go back to the Check menu screen.

Deleting the error history

Select "Service" from the Main menu, and press the button.

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[TEST] button

Pipe (liquid) temperature

Displays the remaining test run time.

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

• 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.

*1 After turning on the power supply, the system will go into startup 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 be lit up. (After the startup mode of the system finishes,

LED2 (red) will be turned off.)

If OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations does not function correctly, the causes written below should be considered. Find causes from

the symptoms.

The below symptoms are under test run mode. “Startup” in the table means the display status of *1 written above.

Remote Controller Display

Symptoms in test run mode

OUTDOOR BOARD LED Display

Cause

Remote controller displays “PLEASE WAIT”, and

cannot be operated.

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

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

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

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

minutes during

system startup. (Normal)

• Incorrect connection of outdoor terminal block (L

1, L2, L3 and

S1, S2, S3.)

• Outdoor unit’s protection devise 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)

After “startup” is displayed, only

green lights up. <00>

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

alternately. <F1>

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

alternately. <F3, F5, F9>

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

alternately. <EA. Eb>

After “startup” is displayed, only

green lights up. <00>

After “startup” is displayed, only

green lights up. <00>

< > indicates digital display.

2. Press TEST button twice.

1. Turn on the main power supply.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

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

7. Register the contact number.

While the room temperature display on the remote controller is “PLEASE WAIT”, the remote controller is disabled. Wait until “PLEASE WAIT” disappears before using remote controller. “PLEASE WAIT” appears for about 2 minutes after power supply is turned on. *1

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

Check for correct motion of auto-vanes.

The TEST RUN appears on the screen.

Operating procedures

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.)

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

LCD display.

LCD

Contents of trouble

P1 P2 P4 P5 P6 P8 P9 PL

Abnormality of room temperature thermistor Abnormality of pipe temperature thermistor/Liquid Abnormality of drain sensor/ Float switch connector open Drain overflow protection is operating. Freeze/overheat protection is operating. Abnormality of pipe temperature

Abnormality of pipe temperature thermistor/Cond./Eva Abnormality of refrigerant circuit

LCD

Contents of trouble

U1~UP

F3~F9 E0~E5

E6~EF

----

FFFF

Abnormality of indoor controller board 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)

LED1

(microprocessor power supply)

LED2

(remote controller)

LED3

(indoor/outdoor communication)

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

Flashes when indoor and outdoor unit are communicating.

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

9-2-3. Test run for wired remote controller <PAR-21MAA>

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ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

TEST RUN

RESET

SET

CLOCK

MODE

COOL

TEST RUN

FAN

VANE

TEST RUN

9-2-4. Test run for wireless remote controller

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

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

(Start this operation from the status of remote controller display

turned off.)

A and current operation mode are displayed. 3 Press the ( ) button to activate mode, then

check whether cool air blows out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air blows out from the unit.

5 Press the button and check whether strong air blows out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

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

Note:

• Point the remote controller towards the indoor unit receiver

while following steps 2 to 7.

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

MODE

HEAT

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Test run Input maintenance info. Function setting Check Self check

kcehc fleS

:tceleS

Ref. address

sserddA

kcehc fleS

Ref. address

Return:

teseR

Error Unt # CI.prG

Self check

Return:

Reset

Ref. address 0

Error Grp.

Unt#

When there is no error history

Self check

Delete error history?

Ref. address

Cancel OK

Self check

Return:

Ref. address

Error history deleted

With theF1orF2button, enter the refrigerant address, and press the button.

Select "Self check" with the F1 or F2 button, and press the button.

Select "Service" from the Main menu, and press the button.

Check code, unit number, attribute will appear.

"-" will appear if no error history is available.

Resetting the error history.

Press the

button (Reset) on the screen that shows the check code history.

A conrmation screen will appear asking if you want to delete the check code history.

Press theF4button (OK) to delete the check code history.

If deletion fails, "Request rejected" will appear. "Unit not exist" will appear if no indoor units that are correspond to the entered address are found.

Navigating through the screens

• To go back to the Main menu ..........

button

• To return to the previous screen .......

button

9-3. HOW TO PROCEED "SELF-DIAGNOSIS"

9-3-1. Self-diagnosis <PAR-31MAA>

OCH671

If operations cannot be completed with the remote controller, diagnose the remote controller with this function.

F1 F2 F3 F4

unem ecivreS

rosruC

:unem niaM

Maintenance password Remote controller check

F1 F2 F3 F4

Remote controller check

:nigeB

Start checking?

Remote controller check

:nigeB

Start checking?

Select "Service" from the Main menu, and press the button.

Select "Remote controller check" with the F1

or F2 button, and press

the

button.

Select "Remote controller check" from the Service menu, and press the but-

ton to start the remote controller check and see the check results.

To cancel the remote controller check and exit the Remote controller check menu screen, press the

or the button.

The remote controller will not reboot itself.

Check the remote controller display and see if anything is displayed (including lines). Nothing will appear on the remote controller display if the correct voltage (8.5 – 12 VDC) is not supplied to the remote controller. If this is the case, check the remote controller wiring and indoor units.

OK: No problems are found with the remote controller. Check other

parts for problems.

E3, 6832: There is noise on the transmission line, or the indoor unit or another

remote controller is faulty. Check the transmission line and the other remote controllers.

NG (ALL0, ALL1):

Send-receive circuit fault. Remote controller needs replacing.

ERC:

The number of data errors is the discrepancy between the number of bits in the data transmitted from the remote controller and that of the data that was actually transmitted over the transmission line. If data errors are found, check the transmission line for external noise interference.

Remote controller check results screen

If the button is pressed after the remote controller check results are displayed, remote controller check will end, and the remote controller will automati-

cally reboot itself.

9-3-2. Remote controller check <PAR-31MAA>

OCH671

When a problem occurs to 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 check code and unit number are displayed alternately as shown below.

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

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

3. T

o clear the check code, press the

ON/OFF

button.

When using remote-/local-controller combined operation, cancel the check code after turning off remote operation.

During central control by a MELANS controller, cancel the check code by pressing the

ON/OFF

button.

Since each unit has a function that stores check codes, the latest check code can be recalled even if it is cancelled by the re

mote

controller or power is turned off.

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

1. Switch to self-diagnosis mode.

Press the

CHECK

button (H

in the picture above) twice within 3 seconds.

The display content will change as shown below.

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

Press the [TEMP] buttons (

and ) (F in the picture above)

to select the desired number or address. The number (address) changes between [01] and [50] or [00] and [15].

3. Display self-diagnosis results.

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

4. Reset the error history.

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

3 ).

Check code (2 or 4 digits)

(Alternating Display)

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

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

Unit number or refrigerant address to be diagnosed

Check code (2 or 4 digits)

(Alternating Display)

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

9-3-3. Self-diagnosis <PAR-21MAA>

9-3-4. Self-Diagnosis During Maintenance or Service <PAR-21MAA>

OCH671

Transmission data from remote controller

Transmission data on transmission path

When the number of data errors is "02":

Press the

ON/OFF

button (D in the picture in the previous page) twice

within 3 seconds. The self-diagnosis address or refrigerant address will blink.

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 2 methods.

Press the

CHECK

button (H in the picture in the previous page.) → Self-diagnosis will be cancelled and the screen will return to the previous state in effect

before the start of self-diagnosis.

Press the

ON/OFF

button (D in the picture in the previous page.) → Self-diagnosis will be cancelled and the indoor unit will stop.

10-3-3. 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.

Press the

CHECK

button (H in the picture in the previous page)

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

Press the

FILTER

button (A in the picture in the previous page)

3. Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

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

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

ing circuit is defective.

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] blinks.

→ Transmission is not possible.

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

(Error display 3)

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

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.

4. To cancel remote controller diagnosis

Press the

CHECK

button (H in the picture in the previous page) for 5 seconds or more. Remote controller diagnosis will be cancelled,

"PLEASE WAIT" and operation lamp will blink. After approximately 30 seconds, the state in effect before the diagnosis will be restored.

Power on indicator

twice within 3 seconds.

to start self-diagnosis.

9-3-5. Remote controller check <PAR-21MAA>

OCH671

• "CHECK" lights, and refrigerant address

"00" flashes.

• Check that the remote controller's

display has stopped before continuing.

• Select the refrigerant address of the

indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

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

• If an air conditioner error occurs, the

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

• The check mode is cancelled.

[Procedure]

1. Press the CHECK button twice.

2. Press the temperature buttons.

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

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

<Malfunction-diagnosis method at maintenance service>

9-3-6. Self-diagnosis <Wireless remote controller>

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

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

RESET

SET

CLOCK

CHECK

CHECK display

Temperature button

CHECK button

Refrigerant address display

HOUR button

ON/OFF button

OCH671

OPERATION INDICATOR lamp flash pattern

Beep Beep Beep Beep Beep

Beep Beep

Off

Approx. 2.5 sOnApprox. 3 s

0.5 sOn0.5 sOn0.5 s

0.5 s

Off

Approx. 2.5 sOnApprox. 3 sOn0.5 sOn0.5 s

··· Repeated

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

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

1st2nd3

1st2

Self-check starts (Start signal received)

Beeper sounds

[Output pattern B]

OPERATION INDICATOR lamp flash pattern

Beep

Beep Beep Beep Beep Beep Beep

Off

Approx. 2.5 sOn0.5 sOn0.5 sOn0.5 s

0.5 s

Off

Approx. 2.5 sOn0.5 sOn0.5 s

··· Repeated

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

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

1st2nd3

1st2

Self-check starts (Start signal received)

Beeper sounds

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

[Output pattern A] Errors detected by indoor unit

[Output pattern B]

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 seconds)” after the initial 2 beeps to confirm the self-check start signal was received, the specified refrigerant address is incorrect.

Notes:

*The check code in the parenthesis indicates PAR-30/31MAA model.

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

Symptom Remark

(Number of times)

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

(Number of times)

Wireless remote controller

Wired remote controller

1 P1

Intake sensor error

P9 Pipe (TH5) sensor error

P2 Pipe (TH2) sensor error

3 E6,E7

Indoor/outdoor unit communication error

4 P4 Drain sensor error/Float switch connector (CN4F) open

P5 Drain pump error

PA Forced compressor stop (due to water leakage abnormality) 6 P6 Freezing/Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4, E5 Remote controller signal receiving error

–

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

Symptom

Indoor/outdoor unit communication error

(Transmitting error) (Outdoor unit)

Open/short of outdoor unit thermistors

Compressor overcurrent interruption (When compressor locked)

5 Abnormal high discharging temperature/insufficient refrigerant

Abnormal high pressure (63H operated)/Overheating protection operation

Abnormal temperature of heat sink

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 undervoltage and abnormal synchronous signal to main circuit/Current sensor error

12 13

UP U3,U4 UF

U1,Ud (UD)*

U8 U6 U7

U9,UH

Others

– –

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

12 14

Fb (FB)*

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

–

E0, E3 – E1, E2 Remote controller control board error

Remote controller transmission error

Abnormality of refrigerant circuit

Compressor overcurrent interruption

As for indoor unit, refer to indoor unit's service manual.

Indoor unit fan motor error

OCH671

9-4. SELF-DIAGNOSIS ACTION TABLE

Note: Refer to indoor unit section for code P and code E.

Check

code

Abnormal points and detection method

Case

Judgment and action

None

—

1 No voltage is supplied to termi-

nal block (TB1) of outdoor unit.

a) Power supply breaker is

turned off.

b) Contact failure or disconnec-

tion of power supply terminal

c) Open phase (L, L2 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 terminal

on outdoor power circuit board)

3 Electric power is not supplied

to outdoor controller circuit board.

a) Disconnection of connector

(CNDC)

4 Disconnection of reactor (DCL

or ACL)

5 Disconnection of outdoor power

circuit board (PUHZ-SP·VKA)/ outdoor noise filter circuit board (PUHZ-SP·YKA) or parts failure in outdoor power circuit board (PUHZ-SP·VKA)/outdoor noise filter circuit board (PUHZSP·YKA)

6 Defective outdoor power circuit

board

7 Open of rush current protect

resistor (RS) (PUHZ-SP·YKA)

8 Defective outdoor controller

circuit board

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.

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board.

Refer to "9-9. TEST POINT DIAGRAM".

4 Check connection of reactor. (DCL or ACL) Refer to "6. WIRING DIAGRAM".

5 a) Check connection of outdoor power circuit

board (PUHZ-SP·VKA)/outdoor noise filter circuit board (PUHZ-SP·YKA).

b) Replace outdoor power circuit board

(PUHZ-SP·VKA)/outdoor noise filter circuit board (PUHZ-SP·YKA).

Refer to "9-9. TEST POINT DIAGRAM".

6 Replace outdoor power circuit board.

7 Replace rush current protect resistor (RS)

* Power circuit board might be short-circuit.

Check the power circuit board. (Refer to "9-9. TEST POINT DIAGRAM")

8 Replace controller board (When items

above are checked but the units cannot be repaired.)

(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 "9-9. TEST POINT DIAGRAM".

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.

OCH671

Check code

Abnormal points and detection method

Judgment and action

(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 cannot be set within 4 minutes after power on because of Miswiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

(6846)

Startup time over

The unit cannot finish startup process within 4 minutes after power on.

Case

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.

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.

Miswiring of indoor/outdoor unit connecting wire

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 excessive number of indoor units.

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: 80 m

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

3 Check the number of indoor units that are

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

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

check.

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

7 Check if refrigerant addresses (SW1-3 to

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

8 Check transmission path, and remove the

cause.

The descriptions above, 1–8, are common for EA, Eb and EC.

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 Excessive number of indoor

units are connected to 1 outdoor unit. (4 units or more)

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.

(6844)

OCH671

Check code

Abnormal points and detection method

Judgment and action

(1302)

High pressure (High pressure switch 63H operated)

Abnormal if high pressure switch 63H (4.15MPa) operated during compressor operation.

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

dirt of indoor fan

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

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

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

Defective outdoor controller board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving circuit

1–6 Check indoor unit and repair defect.

7 Check if stop valve is fully open.

8 Check piping and repair defect. 9–2 Check outdoor unit and repair defect.

3 Check the detected temperature of outside

temperature thermistor on LED display.

(SW2 on A-Control Service Tool : Refer

to "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".)

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 "9-6. HOW TO CHECK THE PARTS"

8 Replace outdoor controller board.

Case

(TH4: 1102)

(TH33: 1132)

High discharging temperature High comp. surface temperature

Abnormal if discharge thermistor (TH4) exceeds 115°C or 110°C continuously for

5 minutes. Abnormal if condenser/evaporator temperature thermistor (TH5) exceeds 40°C during defrosting and discharge thermistor (TH4) exceeds 110°C.

2. Abnormal if discharge superheat (TH4 - TH5) increases. All the conditions are detected simultaneously for 10 minutes continuously after 6 minutes past from compressor startup (including the thermostat indication or recovery from defrosting).

• During compressor operation (in

Cooling only)

• When discharge superheat is less than

80°C in Cooling.

• When condensing temp of TH6 is

more than -40°C. (In Cooling only.)

3. Abnormal if comp. surface temperature

thermistor (TH33) exceeds 115°C or 110°C continuously for 5 minutes.

1 Overheated 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

1 Check intake superheat. Check leakage of refrigerant. Charge additional refrigerant.

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

displayed when the power is on again.

When U3 is displayed, refer to

“Judgement and action” for U3.

5 Check linear expansion valve.

Refer to "9-6. HOW TO CHECK THE PARTS".

(TH4: 5104)

(TH33: 5132)

Open/short circuit of discharge thermistor (TH4) / comp. surface thermistor (TH33)

Abnormal if open (TH4: −20°C or less, TH33: −20°C or less) or short (217°C

or more) is detected during compressor operation. (Detection is inoperative for 10 minutes of compressor starting process.)

1 Disconnection or contact failure

of connector (TH4/TH33) on the outdoor controller circuit board

2 Defective thermistor 3 Defective outdoor controller

circuit board

1 Check connection of connector (TH4/TH33)

on the outdoor controller circuit board.

Check breaking of the lead wire for

thermistor (TH4/TH33). Refer to "9-9. TEST POINT DIAGRAM".

2 Check resistance value of thermistor (TH4/

TH33) or temperature by microprocessor.

(Thermistor/TH4/TH33: Refer to"9-6. HOW

TO CHECK THE PARTS".)

(SW2 on A-Control Service Tool: Refer

to "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".)

3 Replace outdoor controller board.

OCH671

Check code

Abnormal points and detection method

Case

Judgment and action

(4230)

Temperature of heatsink

Abnormal if heatsink thermistor (TH8) detects temperature indicated below. PUHZ-SP·VKA··························· 74 : PUHZ-SP·YKA··························· 77 :

1 The outdoor fan motor is

locked.

2 Failure of outdoor fan motor 3 Air flow path is clogged. 4 Rise of ambient temperature 5 Defective thermistor 6 Defective input circuit of

outdoor power circuit board

7 Failure of outdoor fan drive

circuit

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°C.) Turn off power, and on again to check if U5 is displayed within 30 minutes. If U4 is displayed instead of U5, follow the action to be taken for U4.

5 Check resistance value of thermistor (TH8)

or temperature by microcomputer. (Thermistor/TH8: Refer to

"9-6. HOW TO

CHECK THE PARTS"

(SW2 on A-Control

Service Tool:

Refer to "9-10. FUNCTION OF

SWITCHES, CONNECTORS AND JUMPERS".

)

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

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 thermistor TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor started. Note: Check which unit has abnormality in its thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".)

Check connection of connector (TH3, TH6/TH7) on the outdoor controller circuit board. Check connection of connector (CN6) on the outdoor power circuit board. Check breaking of the lead wire for thermistor TH3, TH6, TH7, and TH8).

Refer to "9-9. TEST POINT DIAGRAM".

Check resistance value of thermistor (TH3, TH6, TH7, and TH8) or check temperature by microprocessor. (Thermistor/TH3, TH6, TH7, and TH8: Refer to "9-6. HOW TO CHECK THE PARTS".) (SW2 on A-Control Service Tool: Refer to "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS")

3 Replace outdoor controller circuit board.

Note: Emergency operation is available in case of

abnormalities of TH3, TH6 and TH7. Refer to "9-8. EMERGENCY OPERATION".

1 Disconnection or contact failure

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

CN6

2 Defective thermistor 3 Defective outdoor controller

circuit board

(

)

(4250)

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 "9-9. TEST POINT DIAGRAM (Outdoor power circuit board)".

4 Check compressor referring to

"9-6. HOW TO

CHECK THE PARTS"

5 Replace outdoor power circuit board.

(1520)

Too low superheat due to low discharge temperature

Abnormal if discharge superheat is continuously detected less than or equal to −15°C for 3 minutes even though linear expansion valve has minimum open pulse after compressor starts operating for 10 minutes.

1 Disconnection or loose

connection of Discharge thermistor (TH4)

2 Defective holder of Discharge

thermistor

3 Disconnection or loose connection

of linear expansion valve’s coil

4 Disconnection or loose

connection of linear expansion valve’s connector

5 Defective linear expansion valve

12 Check the installation conditions of

discharge thermistor (TH4).

3 Check the coil of linear expansion valve.

Refer to "9-7.HOW TO CHECK THE COMPONENT".

4 Check the connection or contact of LEV-A and

LEV-B on outdoor controller circuit board.

5 Check linear expansion valve. Refer to "

9-6. HOW TO CHECK THE PARTS"

(4400)

Outdoor fan motor

Abnormal if rotational frequency of the fan motor is not detected during DC fan motor operation. Fan motor rotational frequency is abnormal if;

• 100 rpm or below detected continuously

for 15 seconds at 20: or more outside air temperature.

• 50 rpm or below or 1500 rpm or more

detected continuously for 1 minute.

1 Failure in the operation of the

DC fan motor

2 Failure in the outdoor circuit

controller board

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 action 1 above.)

Thermistors

Open detection Short detection

Symbol Name

TH6 TH7 TH8

−48 : or below

−27 : or below

90 : or above 90 : or above

102 : or above

Thermistor <2-phase pipe>

TH3 −48 : or below 90 : or above

Thermistor <Liquid>

Thermistor <Ambient>

Thermistor <Heatsink>

OCH671

Check code

Abnormal point and detection method

Case

Judgment and action

(4220)

Detailed

codes

To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Refer to

"9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".

Overvoltage error

• Increase in DC bus voltage to

PUHZ-SP·VKA: 430 V PUHZ-SP·YKA: 760 V

1 Abnormal increase in power source

voltage

2 Disconnection of compressor wiring

3 Defective outdoor power circuit

board

4 Compressor has a ground fault.

1 Check the field facility for the power

supply.

2 Correct the wiring (U.V.W phase) to

compressor

. Refer to "9-9. TEST POINT

DIAGRAM (Outdoor power circuit board)".

3 Replace outdoor power circuit board. 4 Check compressor for electrical insula-

tion. Replace compressor.

Undervoltage error

• Instantaneous decrease in DC

bus voltage to PUHZ-SP·VKA: 200 V PUHZ-SP·YKA: 350 V

1 Decrease in power source voltage,

instantaneous stop.

2 Defective converter drive circuit

outdoor power circuit board (

PUHZ-

SP·VKA)

3 Defective 52C drive circuit in outdoor

power circuit board

4 Disconnection or loose connection

of rush current protect resistor RS (PUHZ-SP·YKA)

5 Defective rush current protect

resistor RS (PUHZ-SP·YKA)

Disconnection or loose connection of CN2 on the outdoor power circuit board /controller circuit board (

PUHZ-

SP·VKA

)

7 Power circuit failure on DC supply for

15 V DC output on outdoor controller circuit board (PUHZ-SP·VKA)

1 Check the field facility for the power

supply.

2 Replace outdoor power circuit board.

(PUHZ-SP·VKA)

3 Replace outdoor power circuit board.

4 Check RS wiring. (PUHZ-SP·YKA)

5 Replace RS. (PUHZ-SP·YKA)

6 Check CN2 wiring. (PUHZ-SP·VKA)

7 Replace outdoor controller circuit board.

(PUHZ-SP·VKA)

Input current sensor error/ L1-phase open error

• Decrease in input current

through outdoor unit to 0.1 A only if operation frequency is more than or equal to 40 Hz or compressor current is more than or equal to 6 A.

1 L1-phase open (PUHZ-SP·YKA)

2 Disconnection or loose connection

between TB1 and outdoor noise filter circuit board (PUHZ-SP·YKA)

Disconnection or loose connection of CN5 on the outdoor power circuit board/CNCT on the outdoor noise filter board (

PUHZ-SP·YKA

)

4 Defective ACCT (AC current trans)

on the outdoor noise filter circuit board (PUHZ-SP·YKA)

5 Defective input current detection

circuit in outdoor power circuit board

6 Defective outdoor controller circuit

board

1 Check the field facility for the power

supply. (PUHZ-SP·YKA)

2 Check the wiring between TB1 and out-

door noise filter circuit board. (PUHZSP·YKA)

3 Check CN5/CNCT wiring. (PUHZ-

SP·YKA)

4 Replace outdoor noise filter circuit

board. (PUHZ-SP·YKA)

5 Replace outdoor power circuit board.

6 Replace outdoor controller circuit board.

Abnormal power synchronous signal

• No input of power synchronous

signal to power circuit board

• Power synchronous signal

of 44 Hz or less, or 65 Hz or more is detected on power circuit board.

1 Distortion of power source voltage,

noise superimposition.

2 Disconnection or loose connection

of earth wiring

3 Disconnection or loose connection

of CN2 on the outdoor power circuit

board /controller circuit board

4 Defective power synchronous signal

circuit in outdoor controller circuit

board

5 Defective power synchronous signal

circuit in outdoor power circuit board

1 Check the field facility for the power

supply.

2 Check earth wiring.

3 Check CN2 wiring.

4 Replace outdoor controller circuit board.

5 Replace outdoor power circuit board.

Continue to the next page.

OCH671

(4100)

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 6 Dip switch setting difference of

outdoor controller circuit board.

1 Open stop valve. 2 Check facility of power supply.

3 Correct the wiring (U

•V•W phase) to

compressor.

Refer to "9-9. TEST POINT DIAGRAM

(Outdoor power circuit board)".

4 Check compressor.

Refer to "9-6. HOW TO CHECK THE PARTS".

5 Replace outdoor power circuit board. 6 Check the DIP switch setting of outdoor con-

troller circuit board. Refer to "Model Select" section at (1) Function of switches" in "9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".

(UD)*

(1504)

Over heat 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 check code. If U4 is displayed, follow the U4 processing direction.

*The check code in the parenthesis indicates

PAR-30/31MAA model.

Check code

Abnormal point and detection method

Case

Judgment and action

(4220)

From the previous page.

(5300)

Current sensor error

● Abnormal if 38 A of incurrent is detected

or 34A or more of input current is detected for 10seconds continuously.

1 Defective circuit of current

sensor on outdoor power circuit board

2 Decrease of power supply

voltage

1 Replace outdoor power circuit board. 2 Check the facility of power supply.

(1300)

Low pressure

Abnormal if the following conditions are detected for continuously 3 minutes. Note that it applies when the compressor accumulated operating time is under 30 minutes, and 7 minutes has passed after the compressor operation.

TH33 - TH4 ] 20 : and TH33 > 80 :

Thermistors: TH33: Comp. Surface temperature TH4: Discharge temperature TH5: Indoor 2-phase pipe temperature TH7: Ambient temperature

1 Stop valve of outdoor unit is

closed during operation.

2 Leakage or shortage of

refrigerant

3 Malfunction of linear expansion

valve

4 Clogging with foreign objects in

refrigerant circuit

Note: Clogging occurs in the parts which become below freezing point when water enters in refrigerant circuit.

1 Check stop valve.

2 Check intake superheat.

Check leakage of refrigerant. Check additional refrigerant.

3 Check linear expansion valve.

Refer to "9-6. HOW TO CHECK THE PARTS".

4 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum more than 1 hour.

PFC error (Overvoltage/ Undervoltage/Overcurrent)

• PFC detected any of the following:

a) Increase in DC bus voltage

to 460 V

b) Decrease in PFC control

voltage to 12 V DC or lower

c) Increase in input current

(PUHZ-SP·VKA only)

1 Abnormal increase in power

source voltage

2 Decrease in power source voltage, instantaneous stop. 3

Disconnection of compressor wiring

4 Misconnection of reactor (DCL) 5 Defective outdoor power circuit

board

6 Defective Reactor(DCL) 7 Disconnection or loose

connection of CN2 on the outdoor power circuit board/ controller circuit board

12 Check the eld facility for the power

supply.

3 Correct the wiring (U.V.W phase) to

compressor. Refer to "9-9. TEST POINT DIAGRAM".

4 Correct the wiring of reactor (DCL) 5 Replace outdoor power circuit board. 6 Replace Reactor (DCL). 7 Check CN2 wiring.

PFC/IGBT error (Undervoltage)

• When Compressor is running,

DC bus voltage stays at 310V or lower for consective 10 seconds.

(PUHZ-SP·VKA only)

1 Incorrect switch settings on the

outdoor controller circuit board for model select

2 Defective outdoor power circuit

board

3 Defective outdoor controller

circuit board

1 Correction of a model select

2 Replace outdoor power circuit board.

3 Replace outdoor controller circuit board.

Detailed

codes

OCH671

Check code

Abnormal points and detection method

Judgment and action

Case

(4210)

Compressor overcurrent interruption

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

1 Stop valve of outdoor unit is

closed.

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 8 Defective outdoor power circuit

board

9 Dip switch setting difference of

outdoor controller circuit board

1 Open stop valve.

2 Check facility of power supply. 3 Correct the wiring (U

•V•W phase) to compres-

sor. Refer to "9-9. TEST POINT DIAGRAM (Outdoor power circuit board)".

4 Check indoor/outdoor fan. 5 Solve short cycle. 6 Replace outdoor controller circuit board. 7 Check compressor. Refer to "9-6. HOW TO

CHECK THE PARTS".

● 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.

8 Replace outdoor power circuit board 9 Check the dip switch setting of outdoor con-

troller circuit board

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

1 Abnormal if main or sub remote control-

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

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

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

1 Abnormal if indoor controller board

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

2 Indoor controller board cannot receive

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

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 cable o 3 or more.)

• The number of connecting indoor units:

Max. 16 units

•

The number of connecting remote controller: Max. 2 units

When it is not the above-mentioned problem of 1–3 4 Diagnose remote controllers.

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.

When “RC E3” or “ERC 00-66” is displayed, noise may be causing abnormality.

Note:

If the unit is not normal after replacing indoor controller board in group control, indoor controller board of address “0” may be abnormal.

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 Miswiring of remote controller 4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiv-

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

6 Noise has entered into the

transmission wire of remote controller.

Remote controller control board

1 Abnormal if data cannot be normally

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

(Check code: E1) 2 Abnormal if the clock function of remote

controller cannot be normally operated.

(Check code: E2)

1 Defective remote controller 1 Replace remote controller.

OCH671

Check code

Abnormal points and detection method

Judgment and action

Case

(6840)

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

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/

outdoor unit connecting wire of indoor or outdoor units.

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

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

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

1 Abnormal if remote controller could not

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

2 Remote controller receives transmitted

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

1 Abnormal if indoor controller board could

not find blank of transmission path.

(Check code: E5) 2 Indoor controller board receives

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

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting.

4–6 Diagnose remote controller.

a) When “RC OK” is displayed, remote

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.

1 2 remote controller 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.

(6840)

Indoor/outdoor unit communication error (Signal receiving error)

1 Abnormal if indoor controller board could

not receive any signal normally for 6 minutes after turning the power on.

2 Abnormal if indoor controller board could

not receive any signal normally for 3 minutes.

3 Consider the unit as abnormal under

the following condition. When 2 or more indoor units are connected to an outdoor unit, indoor controller board could not receive a signal for 3 minutes from outdoor controller circuit board, a signal which allows outdoor controller circuit board to transmit signals.

Check LED display on outdoor controller circuit board. (Connect A-Control service tool (PACSK52ST))

Refer to EA~EC item if LED displays EA~AC.

1 Check disconnecting or looseness of indoor

/outdoor unit connecting wire of indoor unit or outdoor unit.

Check all the units in case of twin/triple/

quadruple indoor unit system.

2–4

Turn the power off, and on again to check.

If abnormality generates again, replace

indoor

controller board or outdoor controller

circuit

board.

* Other indoor controller board may have

defect in case of twin/triple/quadruple indoor unit system.

5 Turn the power off, and detach fan motor

from connector (CNF1, 2). Then turn the power on again.

If abnormality is not displayed, replace fan

motor.

If abnormality is displayed, replace outdoor

controller circuit board.

6 Connect 52C relay properly to CN52C (PUHZ-SP·VKA)

1 Contact failure, short circuit or

miswiring (converse wiring) of indoor/outdoor unit connecting wire

2 Defective transmitting receiving

circuit of outdoor controller circuit board.

3 Defective transmitting receiving

circuit of indoor controller board.

4 Noise has entered into indoor/

outdoor unit connecting wire.

5 Defective fan motor 6 Disconnection of 52C relay

(PUHZ-SP·VKA)

Indoor/outdoor unit communication error (Transmitting error)

Abnormal if “1” receiving is detected 30 times continuously though indoor controller board has transmitted “0”.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into power

supply.

3 Noise has entered into outdoor

control wire.

1–3 Turn the power off, and on again to

check. If abnormality generates again, replace indoor controller board.

OCH671

Check code

Abnormal points and detection method

Judgment and action

Case

(6607

6608)

Non defined check code

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

1 Noise has entered transmission

wire of remote controller.

2 Noise has entered indoor/ out-

door unit connecting wire.

3 Outdoor unit is not a series of

power-inverter.

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.

(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.

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.

2 Abnormal if communication between

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

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.

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.

Pipe temperature

Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes after the liquid or condenser/ evaporator pipe is out of cooling range. Note 1)

It takes at least 9 minutes to detect.

Note 2) Abnormality P8 is not detected in

drying mode.

Cooling range : Indoor pipe temperature

(TH2 or TH5) − intake temperature

(TH1) [ −3°C

TH: Lower temperature between liquid pipe

temperature and condenser/evaporator temperature

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.

23 Check converse connection of extension

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

Conduct temperature check with outdoor controller circuit board after connecting ‘A-Control Service Tool (PAC-SK52ST)’.

(

)

1 2 3 4 5 6

OFF

1 2 3 4 5 6

OFF

1 234 5 6

OFF

1 2 3 4 5 6

OFF

A-Control Service Tool SW2 setting

Temperature display of indoor liquid pipe Indoor 1

Temperature display of indoor liquid pipe Indoor 2

Temperature display of indoor condenser/ evaporator pipe Indoor 1

Temperature display of indoor condenser/ evaporator pipe Indoor 2

(6841)

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 3 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/ out-

door 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.

OCH671

Check code

Abnormal points and detection method

Case Judgment and action

(6600)

Address duplicate 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.

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.

Search the unit with same address as abnormality occurred. If the same address is found, shut the power supply of outdoor unit and 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 waveform or noise on transmission wire.

(6602)

Hard ware error of transmission processor

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

remote controller indicate the controller that detected abnormality.

Error is detected if waveform 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.

Defective transmitting receiving circuit of transmission processor

3 Transmission data is changed

by the noise on transmission.

1 If the works of transmission wire is done

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

2 Check transmission waveform or noise on

transmission wire.

(6603)

BUS BUSY

1. Overtime error by collision damage Abnormal if transmitting is not possible

for 8-10 minutes continuously because of collision of transmission.

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

Note: The address and attribute displayed at remote controller indicate the controller that detected abnormality.

1 Transmission processor could

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

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 are 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 waveform or noise on

transmission wire.

<M-NET communication error>

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

(6606)

Communication error with communication processor

Defective communication between unit processor and transmission processor Note: The address and attribute display at remote controller indicate the controller that detected abnormality.

1 Data of transmission 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.

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

Abnormal refrigerant circuit

During Cooling or Auto Cooling operation,

when the following are regarded as failures when detected for one second.

a) The compressor continues to run for 30

or more seconds.

b) The liquid pipe temperature or the

condense/evaporator temperature is 75°C or more.

These detected errors will not be cancelled until the power source is reset.

1 Disconnection of or leakage in

refrigerant pipes

2 Air into refrigerant piping 3 Abnormal operation (no rotation)

of indoor fan

· Defective fan motor.

· Defective indoor control board.

4 Defective refrigerant circuit

(clogging)

1 Check refrigerant pipes for disconnection or

leakage.

2 After the recovery of refrigerant, vacuum

dry the whole refrigerant circuit.

3 Refer to "9-6. HOW TO CHECK THE

PARTS".

4 Check refrigerant circuit for operation.

To avoid entry of moisture or air into

refrigerant circuit which could cause abnormal high pressure, purge air in refrigerant circuit or replace refrigerant.

Check code

Abnormal points and detection method

Judgment and action

Case

OCH671

Continued to the next page.

Check code

Abnormal points and detection method

Case Judgment and action

(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 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

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

2. If displayed address or attribute is outdoor unit, indoor unit detects abnormality when indoor unit transmits signal to outdoor 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

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

1 Turn off the power supply of outdoor

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

2 Check address switch of abnormality-

generated address.

3 Check disconnection or looseness of

abnormality-generated or abnormalitydetected 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 the cause of trouble is not any of 1–5 above, repair the defect, then turn off the power supply of outdoor unit, indoor unit and FRESH MASTER or LOSSNAY at the same time for 2 minutes or more, and turn the power on again.

• If the cause of trouble is not any of 1-5

above in single refrigerant system (one outdoor unit), controller of displayed address or attribute is defective.

• If the cause of trouble is not any of 1–5

above in different refrigerant system (2 or more outdoor units), judge with 6.

6 If address of abnormality source is the

address that should not exist, there is the unit that memorizes nonexistent address information. Delete useless address information with manual setting function of remote controller.

Only the system FRESH MASTER or

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

If the cause of trouble is not any of 1–6 above, replace the controller board of displayed address or attribute. If the unit does not return normally, multicontroller board of outdoor unit may be defective (repeater circuit). Replace multi-controller board one by one to check if the unit returns normally.

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

1 During group operation with

indoor unit of multi- refrigerant system, if remote controller transmits signal to indoor unit while outdoor unit power supply of one refrigerant system is turned off or within 2 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

OCH671

Check code

Abnormal points and detection method

Case Judgment and action

(6607)

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

1 During sequential operation

of indoor unit and FRESH MASTER of other refrigerant system, if indoor unit transmits signal 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

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

1 If the power supply of

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

2 During sequential operation

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

3 Contact failure of transmis-

sion wire of indoor unit of LOSSNAY

4 Disconnection of transmission

connector (CN2M) of indoor unit

5 Defective transmitting receiv-

ing circuit of indoor unit or LOSSNAY

7. If displayed address or attribute is nonexistent.

1 The unit of former address

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

2 Abnormality is detected

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

From the previous page.

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

1 During group operation with

indoor unit of multi- refrigerant system, if indoor unit transmit signal to remote controller while outdoor unit power supply of one refrigerant system is turned off or within 2 minutes of restart, abnormality is detected.

2 Contact failure of transmission

wire of remote controller or indoor unit

3 Disconnection of transmission

connector (CN2M) of indoor unit

4 Defective transmitting receiving

circuit of indoor unit or remote controller

Same as mentioned in “A7” of the previous page.

OCH671

9-5. TROUBLESHOOTING OF PROBLEMS

Phenomena

Factor Countermeasure

1. Remote controller display does not work.

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

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

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

1 At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to startup.

2 Communication error between the remote controller

and indoor unit

3 Communication error between the indoor and out-

door unit

4 Outdoor unit protection device connector is open.

1 12 V DC is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

2 12–15 V DC is supplied to remote controller, how-

ever, no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

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.

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

utes at most in case of indoor/outdoor unit communication error. Check LED3 on indoor controller board.

(1) When LED3 is not blinking.

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

(2) When LED3 is blinking.

Indoor/outdoor connecting wire is normal.

4 Check LED display on outdoor controller

circuit board.

Refer to "9-10. FUNCTION OF

SWITCHES, CONNECTORS AND JUMPERS"

Check protection device connector (63H) for contact failure. Refer to "9-9. TEST POINT DIAGRAM".

Check code

Abnormal points and detection method

Case Judgment and action

(6608)

M-NET NO RESPONSE

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

1 Transmitting condition is

repeated fault because of noise and the like.

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

or more

4 Accidental malfunction of

abnormality-generated controller

1 Check transmission waveform or noise on

transmission wire.

2 Turn off the power supply of outdoor unit

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

Phenomena

Factor

Countermeasure

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7. 1 For 3 minutes after temperature

adjuster turns off, the 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

(For protection of compressor)

12 Normal operation

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.

1 The pair number settings of the wireless remote

controller and indoor controller board are mismatched.

1 Check the pair number settings.

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

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.

• Local remote controller operation is prohibited by

centralised controller etc. since it is connected to MELANS.

3 Phenomena of No.2.

1 Normal operation

2 Normal operation

3 Check the phenomena No.2.

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.)

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 temperature and opening.

• Check pipe connections for gas leakage. 2 Open intake grille and check the filter.

Clean the filter by removing dirt or dust on it.

3 • If the filter is clogged, indoor pipe

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

• Clean the heat exchanger. 4 Remove the blockage.

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How long is “PLEASE WAIT”

kept being displayed on the

remote controller?

6 minutes or more

2 minutes or less

2 to 6 minutes

YES

Are any check codes

displayed on the

remote controller?

Are any check codes

displayed on the LED?

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

Check the display time of “PLEASE WAIT”

after turning on the main power.

•

“PLEASE WAIT” will be displayed during the startup

diagnosis after turning

on the main power.

• Normal.

The startup diagnosis will

be over in around 2 minutes.

• Miswiring of indoor/

outdoor connecting wire

• Breaking of indoor/

outdoor connecting wire (S3)

• Defective indoor

controller board

• Defective outdoor

controller circuit board

• Refer to “Self-diagnosis

action table” in order to solve the trouble.

• In case of communication

errors, the display of remote controller may not match the LED display of the outdoor unit.

• Defective indoor

controller board

• Defective remote

controller

Check the LED display of the outdoor controller circuit board.

Diagnosis flow Cause

Inspection method and troubleshooting

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198 V AC to 264 V AC?

12 V DC to 16 V DC ?

YES

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.

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

Check the voltage of indoor controller board (CN2D).

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

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

•

Troubles concerning

power supply.

• Check the power wiring

to the outdoor unit.

• Check the breaker.

• Bad wiring of the

outdoor controller board.

• The fuses on the

outdoor controller circuit board are melting.

• Check the wiring of the

outdoor unit.

• Check if the wiring is bad.

Check if the fuses are melting.The fuses on the outdoor controller circuit board will be melting when the indoor/outdoor connecting wire short-circuits.

• Bad wiring of the

outdoor controller board.

• The fuses on the

outdoor controller circuit board are melting.

• 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

power board

• Replace the indoor

power board.

• 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.

Symptoms: Nothing is displayed on the remote controller 1

Diagnosis flow Cause

Inspection method and troubleshooting

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

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198 V AC to 264 V AC?

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

Is anything displayed?

17 V DC to 28 V DC?

Is “E8” displayed?

Can all the indoor

unit be operated?

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

YES

Not lighting.

Blinking.

YES

Not displayed.

Displayed.

YES

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.

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

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

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

Can the unit be restarted?

•

Breaking or poor contact of the indoor/outdoor connecting wire

• Fix the breaking or poor

contact of the indoor/outdoor

connecting wire.

• Defective outdoor

controller circuit board

• Replace the outdoor

controller circuit board.

• 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.

• Defective indoor

power board

• Replace the indoor

power board.

• Defective outdoor

power circuit board

• Replace the outdoor

power circuit board.

• Defective indoor

controller board

•

Replace the indoor controller

board of the indoor unit which

does not operate.

• Defective outdoor

controller circuit board

• Replace the outdoor

controller circuit board.

• Influence of

electromagnetic noise

• Not abnormal.

There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

Symptoms: Nothing is displayed on the remote controller 2

Diagnosis flow Cause

Inspection method and troubleshooting

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

Check the status of the indoor controller board LED3 display.

Is the refrigerant address “0”?

YES

Is “EA” or “Eb” displayed?

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Diagnosis flow Cause

Inspection method and troubleshooting

Symptoms: Nothing is displayed on the remote controller 3

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

10 V DC to 16 V DC?

YES

Lighting

Blinking

Lighting

Blinking

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

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

• 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 10 V and 16 V DC, 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.

Check the status of the LED2.

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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 condition: When the set temperature is lower than the room temperature.

The room cannot be cooled or sufficiently.

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.

A gas escaping sound is heard

sometimes.

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

A cracking sound is heard

sometimes.

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.

Sound comes out from the air conditioner.

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.

The operating display of remote

controller does not come on.

Phone Calls From Customers How to Respond Note

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

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.

Check code appears and blinks on the display of remote controller.

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

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

3 Check code will be displayed if any protection devices of the air conditioner are actuated. What is check code?

“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.

“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.

Unit does not operate at all.

Remote controller

• Before repair <Frequent calling from customers>

Continue to the next page

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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.

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

There might be a case that “CENTRALLY CONTROLLED

INDICATOR

” will not be

displayed.

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

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

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

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.

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

Phone Calls From Customers How to Respond Note

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 fan of the outdoor unit is controlling the airflow amount in order to keep the optimum operating condition.

A sound, similar to water

flowing, is heard from the unit.

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

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

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.

Something is wrong with the blower…..

The airflow direction is changed

during COOL operation.

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

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

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

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

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

Sound comes out from the air conditioner.

…..

Something is wrong with the airflow direction...

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Phone Calls From Customers How to Respond Note

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

A white mist is expelled from the indoor unit.

When pipes or piping joints are cooled, they get sweated and water drips down.

Note: Make use of optional parts “Drain Socket” and “Drain pan” if these water needs to be collected and drained out for once.

Water or moisture is expelled from the outdoor unit.

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

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

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1 2 3 4 5

Gray

Orange

Red

Yellow

Black

Parts name

Check points

Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10°C to 30°C)

Thermistor(TH3) <Liquid> Thermistor (TH4) <Discharge> Thermistor (TH6) <2-phase pipe> Thermistor (TH7) <Ambient> Thermistor (TH8) <Heatsink> Thermistor (TH33) <Comp. surface>

Normal

160 kΩ–410 kΩ

TH4, TH33

Abnormal

Motor for compressor (MC)

Linear expansion valve (LEV-A/LEV-B)

Abnormal

Open or shortRefer to “4-2. COMPRESSOR TECHNICAL DATA”.

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

Normal

Gray–Black Gray–Red

Gray–Yellow

Gray–Orange

Abnormal

46 ± 3 Ω

Open or short

Refer to the next page.

Fan motor(MF1,MF2)

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

Normal

39 kΩ–105kΩ

4.3 kΩ–9.6 kΩ

Open or short

TH3 TH6 TH7

TH8

Measure the resistance between the terminals with a tester. (At the ambient temperature −10°C to 40°C)

Solenoid valve coil <4-way valve> (21S4)

Normal

Abnormal

Open or short

1190 to 1780 Ω

9-6. HOW TO CHECK THE PARTS

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH PUHZ-SP125YKA.TH PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

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Notes

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

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

(It causes trouble of the outdoor controller circuit board and fan motor.)

Self check

Symptom : The outdoor fan cannot turn around.

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

Fail

Wiring contact check

Contact of fan motor connector (CNF1)

Fuse check

Check the fuse (F5) on outdoor controller board.

Power supply check (Remove the connector (CNF1))

3Turn on the breaker to start test run.

TEST POINT 1 : VDC (between 1 (+) and 4 (-) of the fan connector): VDC 250-380 V DC TEST POINT 2 : VCC (between 5 (+) and 4 (-) of the fan connector): VCC 15 V DC

Recover wiring.

Replace outdoor controller board.

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

Replace outdoor

controller board.

Is the voltage normal?

Is there contact failure?

Yes

Did the fuse blow?

Yes

Check the operation of fan. END

Yes

Check the operation. END

Yes

Replace the defective fan motor

TEST POINT

3 : VSP (between 6 (+) and 4 (-) of the fan connector): VSP 6.5 V DC

5Turn off the breaker and turn off the SW6-3.

2Disconnect the connector (CNF1).

1Turn off the breaker and turn on the SW6-3.

4Measure the voltage in the outdoor controller circuit board.

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9-7. HOW TO CHECK THE COMPONENTS

Low temperature thermistors

• Thermistor <Liquid> (TH3)

• Thermistor <2-phase pipe> (TH6)

• Thermistor <Ambient> (TH7)

0°C 15 k" 10°C 9.6 k" 20°C 6.3 k" 25°C 5.2 k"

0°C 180 k" 25°C 50 k" 50°C 17 k" 70°C 8 k" 90°C 4 k"

30°C 4.3 k" 40°C 3.0 k"

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

t =15exp{3480(

273+t

–

273

)}

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

t =17exp{4150(

273+t – 323

)}

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

t =7.465exp{4057(

273+t – 393

)}

Medium temperature thermistor

• Thermistor <Heatsink> (TH8)

20°C 250 k" 30°C 160 k" 40°C 104 k" 50°C 70 k" 60°C 48 k"

70°C 34 k" 80°C 24 k" 90°C 17.5 k" 100°C 13.0 k" 110°C 9.8 k"

High temperature thermistor

• Thermistor <Discharge> (TH4)

• Thermistor <Comp. surface> (TH33)

-20 -10 0 10 20 30 40 50

Temperature (:)

Resistance (k")

200

150

100

25 50 75 100 125

Temperature (:)

Resistance (k")

500

400

300

200

100

50 75 100 120

Temperature (:)

Resistance (k")

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(2) Linear expansion valve operation

Open

Extra tightening (about 32 pulse)

Pulse number

500 pulse Opening a valve all the way

Valve position (capacity)

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

The output pulse shifts in above order.

• When linear expansion valve operation stops, all output phase

become OFF.

• When the power is turned on, 700 pulse closing valve signal will

be sent till it goes to

A point in order to define the valve position.

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

• When the valve moves smoothly, there is no sound or vibration

occurring from the linear expansion valve : however, when the pulse number moves from

B to A or when the valve is locked,

more sound can be heard.

No sound is heard when the pulse number moves from B to A in

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

• Sound can be detected by placing the ear against the screw driver

handle while putting the screw driver to the linear expansion valve.

LEV

Gray

Orange

Red

Yellow

Black

Connector LEV-A

LEV-B

12 V DC

Outdoor controller board

Drive circuit

Linear expansion valve

(1) Operation summary of the linear expansion valve

• Linear expansion valve opens/closes 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.

OFF

Output

(Phase)

Output

2 3 4

5 6 7 8

OFF

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Main body

Lead wire

Stopper

Coil

Be sure to attach the stopper.

(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.

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 stress.

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

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(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.

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

9-8. EMERGENCY OPERATION

(1) When the check 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) on indoor controller board to ON and short-circuiting the connector (CN31) on outdoor controller board.

(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 check 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 Turning the main power supply on will start the emergency operation.

OFF

CN31

Shorting pins

Inspected content

Open/short of outdoor unit thermistor (TH6/TH7/TH8)

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

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

Communication error other than outdoor unit

Communication error between outdoor controller board and M-NET board (Serial communication error)

Check code

E0 ~ E7

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

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(5) Operation data during emergency operation

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

Operation data

Intake temperature (TH1)

Indoor pipe temperature (TH2)

Indoor 2-phase pipe temperature (TH5)

Set temperature

Outdoor liquid pipe temperature (TH3)

Outdoor discharge pipe temperature (TH4)*

Outdoor comp. surface temperature (TH32/TH33)

Outdoor 2-phase pipe temperature (TH6)

Outdoor ambient temperature (TH7)

Temperature difference code

(room temperature - set temperature) (∆Tj)

Discharge superheat (SHd)

Sub-cool (SC)

Operation mode

COOL

27:

25:

45:

80:

50:

35:

30:

HEAT

20.5:

45:

50:

22:

80:

30:

)

Remarks

*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. *

If one thermistor is set to open/short, the values for SHd/SC will be different from the list above.

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

COOL

45:

HEAT

50:

45:

Thermistor

TH3

TH6

TH4/TH32

TH5

TH2

Regard normal figure as effective data.

Discharge superheat (SHd) Cooling = TH4(or TH32/TH33)−TH6 = Tc−Ta Heating = TH4(or TH32/TH33)−TH5 = Td−50 Degree of subcooling (SC) Cooling = TH6−TH3 = Ta−45 Heating = TH5−TH2 = 50−45 = 5:

—

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9-9. TEST POINT DIAGRAM Outdoor controller circuit board

TH3

Thermistor <Liquid>

PUHZ-SP100YKA.TH PUHZ-SP125VKA.TH PUHZ-SP125YKA.TH PUHZ-SP140VKA.TH PUHZ-SP140YKA.TH

CNS

S1-S2: 230 V AC

CNAC

2 to 4: Power supply for outdoor controller circuit board (230 V AC) 1 to 3: Power supply for indoor and outdoor unit connection wire (230 V AC)

CN4

Transmission to outdoor power circuit board (CN4)

CN51

External signal output

• Compressor operating signal

• Abnormal signal

CN2

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

power circuit board

2-5: Zero cross signal

(0-5 V DC)

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

SW1

Manual defrost, detect history record reset, refrigerant address

CNDM

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

SW7

Demand control setting

63H

High pressure switch

SW4

Test operation

SW6

Model select

SW5

Function switch

TH4

Thermistor <Discharge>

TH7/6

Thermistor <Ambient/2-phase pipe>

VFG

(

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

(Same as (CNF17(+)-4(-))

VSP

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

LEV-B

Linear expansion valve

SWP

Pump down

SW8

Pipe replace Wiring replace

CNM

Connect to A control service tool

CNMNT

Connect to M-NET adapter (CN5)

CNVMNT

Connect to M-NET adapter (CND)

TH33

Thermistor <Comp. surface>

Communication power supply D71 Voltage 24 V DC

CNF1 Connect to the fan motor

1-4: 250-380 V DC 5-4: 15 V DC 6-4: 0-6.5 V DC 7-4: 15 V DC (When stopped)

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

CNDC

250-380 V DC (1+, 3-) (Outdoor power circuit board for SP42/48V) (Noise filter circuit board for SP36/42/48Y)

+ -

LEV-A

Linear expansion valve

OCH671

Outdoor noise filter circuit board

LI1, LI2, LI3, NI POWER SUPPLY

LI1-LI2/LI2-LI3/LI3-LI1 : 400 V AC input LI1-NI/LI2-NI/LI3-NI : 230 V AC input (Connect to the terminal block (TB1))

Connect to the electrical parts box

CNAC1, CNAC2 230 V AC

(Connect to the outdoor controller circuit board (CNAC))

CNDC

(Connect to the outdoor controller circuit board (CNDC))

LO1, LO2, LO3 POWER SUPPLY

LO1-LO2/LO2-LO3/LO3-LO1 : 400 V AC OUTPUT (Connect to the outdoor power circuit board (TB-L1, L2, L3))

CNCT Primary current

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

CNL Connect to the ACL4

Connect to the electrical parts box

PUHZ-SP100YKA.TH PUHZ-SP125YKA.TH PUHZ-SP140YKA.TH

OCH671

Outdoor power circuit board

Brief Check of POWER MODULE 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 POWER MODULE 1 Check of DIODE circuit

R - P1 , S - P1 , R - N1 , S - N1 2 Check of IGBT circuit P2 - L1 , P2 - L2 , P2 - L3 , N2 - L1 , N2 - L2 , N2 - L3 3 Check of INVERTER circuit P3 - U , P3 - V , P3 - W , N3 - U , N3 - V , N3 - W

Note: The marks R , S , L1 , L2 , L3 , P1 , P2 , P3 , N1 , N2 , N3 , U , V and W

shown in the diagram are not actually printed on the board.

L3P2L1

CNAC1, CNAC2

230 V AC Connect to the outdoor controller circuit board (CNAC)

EI, E2, E3, E4

Connect to the earth

CN2 Connect to the outdoor controller circuit board (CN2)

1-5

:Transmitting signal to outdoor controller circuit board (0-5 V DC)

2-5

: Zero cross signal (0-5 V DC)

3-4

:16 V DC

6-5

:16 V DC

7-5

:16 V DC

CN4

Connect to the outdoor controller circuit board (CN4)

NI, LI

Voltage of 230 V AC is input (Connect to the terminal block (TB1))

CNDC

280-380 V DC (1+, 3-) Connect to the outdoor controller circuit board (CNDC)

CN6

Thermistor

TB1A, TB2A, TB3A, TB1B, TB2B, TB3B Connect to DCL

PUHZ-SP125VKA.TH PUHZ-SP140VKA.TH

OCH671

Outdoor power circuit board

1. Check of DIODE MODULE L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1

2. Check of DIP-IPM P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W

Note: The marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W

shown in the diagram are not actually printed on the board.

PUHZ-SP100YKA.TH PUHZ-SP125YKA.TH PUHZ-SP140YKA.TH

CN5

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

CN4

Connect to the outdoor controller circuit board (CN4)

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

→

Transmitting signal to the controller board (0-5 V DC)

2-5: Zero cross signal (0-5 V DC) 3-4: Not used 6-5: 16 V DC 7-5: 16 V DC

[ 5 : – 1, 2, 6, 7 : + ]

Diode module

DIP-IPM

TAB connector on X52CA

Connect to the RS resistor

TB-L1,TB-L2,TB-L3 Connect to the outdoor noise filter board (L1-OU, L2-OU, L3-OU) 400 V AC

L3OUT-L3IN

Lead connect

TB-P1 Connect to DCL

CN6

Thermistor <Heat sink> (TH8)

W V

P1 L1 L2 L3 N1

TB-U, TB-V, TB-W

Connect to the compressor (MC) Voltage among phases: 10 V- 400 V AC

TB-P3

Connect to DCL

OCH671

Switch

Type

switch

DIP

switch

Push

switch

SW1

No.

Function Effective timing

Action by the switch operation

Manual defrost

Start Normal

When compressor is working in heating operation. *

Abnormal history clear

Refrigerant address setting

When power supply ON

Clear Normal off or operating

SWP

Under suspension

Pump down Start Normal

SW4

Test run Operating OFF

Under suspension

Test run mode setting

Heating Cooling

ON OFF

1 2 3

0 1 2 3

4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6

1 2 3

4 5 6 7

4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6

1 2 3

8 9 10 11

4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6

1 2 3

12 13 14 15

4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6ON1 2 3 4 5 6

9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches

The black square ( ) indicates a switch position.

Continued to the next page

*1 Manual defrost should be done as follows.

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

• Heat mode setting

• 10 minutes have passed since compressor started operating or previous manual defrost is finished.

• Pipe temperature is less than or equal to 8°C.

Manual defrost will finish if certain conditions are satisfied. Manual defrost 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.

Outdoor M-NET board (optional)

LED2 Energizing display of M-NET board (5V power supply)

CN2M Connect to M-NET

LED13 Receiving

LED11 Outdoor unit connecting display

CN5 Serial communication with outdoor board

SW11 M-NET address (1s digit)

SW12 M-NET address (10s digit)

SW1 Switch for communication display between M-NET and outdoor board

CND Power supply (5 V/12 V) input

2 to 3 5 V DC Input 1 to 3 12 V DC Input

)

1, 2 : + 3 : –

]

[

LED12 Transmitting

LED1 Energizing display of M-NET board (12 V power supply)

OCH671

*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 not all units have DIP SW.

Please refer to the indoor unit installation manual.

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

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

Please do not use SW7-3 to 7-5 usually. Trouble might be caused by the usage condition.

SW6-1 to 3: Function switch.

Type of

Switch

Switch No. Function

Action by the switch operation

Effective timing

ON OFF

Dip

switch

SW5

1 No function — — —

Power failure

automatic recovery

Auto recovery No auto recovery When power supply ON

3,4,5,6 No function — — —

SW7

Setting of demand

control

SW7-1 SW7-2

Power consumption

(Demand switch ON)

OFF OFF 0% (Operation stop)

ON OFF 50%

OFF ON 75%

3 Max Hz setting (cooling) Max Hz (cooling) o 0.8 Normal Always 4 Max Hz setting (heating) Max Hz (heating) o 0.8 Normal Always 5 No function — — — 6 Defrost Hz setting For high humidity Normal Always

SW8

1 No function — — — 2 No function — — — 3 No function — — —

SW9

1 No function — — — 2 Function switch Valid Normal Always

3,4 No function — — —

SW6

1 No function — — —

2 No function — — —

3 Fan motor check mode ON OFF

When power supply ON

during test run

1 2 3 4 5 6 7 8

OFF

SW6-4, 5, 6, 7, 8

MODEL

125V

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

100Y

125Y

140V

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

140Y

OCH671

(3)Special function

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

CN31

Types

Connector

Function Effective timing

Connector

Start

Short Open

Action by open/ short operation

Emergency operation

When power supply ON

Normal

(2) Function of connector

(b) On demand control (Local wiring)

By performing the following modication, operation noise of the outdoor unit can be reduced by about 3-4 dB.

The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.

• The ability varies according to the outdoor temperature and conditions, etc.

1 Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option) 2 SW7-1 (Outdoor unit control board): OFF 3 SW1 ON: Low noise mode

SW1 OFF: Normal operation

A Circuit diagram example (low noise mode)

B On-site arrangement C External input adapter

(PAC-SC36NA-E)

X: Relay

D Outdoor unit control board E Max. 10 m F Power supply for relay

SW1

Orange

Brown

Red

CNDM

C D

A Circuit diagram example

(Demand function) B On-site arrangement X, Y: Relay

C External input adapter (PAC-SC36NA-E)

D Outdoor unit control board E Max. 10 m F Power supply for relay

By performing the following modication, energy consumption can be reduced to 0–100% of the normal consumption.

The demand function will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.

1 Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option) 2 By setting SW7-1 on the control board of the outdoor unit, the energy consumption (compared to the normal consumption) can

be limited as shown below.

SW7-1 SW2 SW3 Energy consumption

Demand

function

OFF OFF 100%

ON OFF 75% ON ON 50%

OFF ON 0% (Stop)

SW2

SW3

Orange

Brown

Red

CNDM

C D

OCH671

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.

1Check refrigerant pipes for disconnection or leakage. 2After the recovery of refrigerant, vacuum dry the whole

refrigerant circuit.

3Refer to section “9-6 HOW TO CHECK THE PARTS”. 4Check refrigerant circuit for operation.

—

A0~A8

[Display] (1)Normal condition

(2)Abnormal condition

Unit condition

Outdoor controller board A-Control Service Tool

LED1 (Green) LED2 (Red) Check code

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

Lighted Lighted Lighted Lighted Lighted

Not lighted

Indication of the display

Alternately blinking display

Operation mode

Not lighted

Lighted

00, etc. 08, etc. C5, etc.

Indication Error

Check code

Outdoor controller board

Contents Inspection method

LED1 (Green) LED2 (Red)

1 blinking 2 blinking

2 blinking 1 blinking

2 blinking

3 blinking

4 blinking

5 blinking

Connector (63H) is open.

Startup time over

Check code is not defined.

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)

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

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

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

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

Remote controller signal receiving error is detected by remote controller.

Remote controller transmitting error is detected by remote controller.

Remote controller signal receiving error is detected by indoor unit.

Remote controller transmitting error is detected by indoor unit.

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

Communication error of M-NET system

*Check code displayed on the remote controller.

Check if indoor/outdoor connecting wire is connected correctly.

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

3Check if noise entered into indoor/outdoor connecting wire or power supply.

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

Check if connector (63H) on the outdoor controller board is

not disconnected.

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

Check if connector (CN4) on outdoor controller board and

outdoor power board is not disconnected.

Check if there is poor connection of connector on outdoor

controller board(CNMNT and CNVMNT).

Check M-NET communication signal.

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

1Check if connecting wire of indoor unit or remote controller

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

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

Check if indoor/outdoor connecting wire is connected correctly.

Check if noise entered into indoor/outdoor connecting wire or

power supply.

Check if noise entered into indoor/outdoor controller board.

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

P.32

P.33 (EA) P.33 (Eb) P.34

(EC) P.39

P.39

P.39 (E8)

P.40 (E9)

P.38

P.39

P.38

P.39

P.40

P.41

P.40

Detailed

reference

page

P.41-

P.44

Continued to the next page

OCH671

UP UH

U6 U3

P1 P2 P9

Indication Error

Check

code*

Outdoor controller board

Contents Inspection method

LED1 (Green)

LED2 (Red)

3 blinking 1 blinking

2 blinking

3 blinking

*Check code displayed on remote controller **Refer to indoor unit’s Service Manual.

4 blinking

5 blinking

6 blinking

7 blinking

1 blinking

2 blinking

3 blinking

4 blinking

Abnormality of comp. surface thermistor(TH33)

and discharge

temperature (TH4)

Abnormality of superheat due to low discharge temperature

1Check if stop valves are open. 2

Check if connectors (TH4, TH33, LEV-A and LEV-B) on outdoor controller

board are not disconnected.

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

outdoor linear expansion valve using a tester.

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

Abnormality of outdoor fan motor rotational speed

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Check if connector

(63H)

on outdoor controller board is not disconnected.

3Check if heat exchanger and filter is not dirty. 4Measure resistance values among terminals on linear expansion valve

using a tester.

1Check if stop valves are open. 2Check looseness, disconnection, and converse connection of

compressor wiring.

Measure resistance values among terminals on compressor using a tester.

4Check if outdoor unit has a short cycle on its air duct.

Compressor overcurrent breaking(Startup locked)

Compressor overcurrent breaking Abnormality of current sensor (P.B.) Abnormality of power module Open/short of discharge thermistor (TH4) and comp. surface thermistor (TH33)

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

1Check if connectors

(TH3,TH4,TH6 ,TH7, TH8 and TH33)

on outdoor

controller

board and connector (CN6) on outdoor power board are

disconnected

2Measure resistance value of outdoor thermistors.

Abnormality of heatsink temperature

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Measure resistance value of outdoor thermistor(TH8).

1Check the outdoor fan motor. 2Check if connector (TH3) on outdoor controller board is disconnected.

Abnormality of voltage 1Check looseness, disconnection, and converse connection of

compressor wiring.

Measure resistance value among terminals on compressor using a tester

3Check if power supply voltage decreases. 4Check the wiring of CN52C.

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

1Check if connectors (CN20, CN21, CN29 and CN44) on indoor controller board are not disconnected. 2Measure resistance value of indoor thermistors.

Abnormality of drain sensor (DS) Float switch(FS) connector open

Indoor drain overflow protection

1Check if connector (CN31)(CN4F) on indoor controller board is not disconnected.

2Measure resistance value of indoor thermistors. 3Measure resistance value among terminals on drain pump using

a tester.

4Check if drain pump works. 5Check drain function.

Freezing (cooling)

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

Abnormality of pipe temperature

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

2Check if stop valve is open. 3

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

4Check if indoor/outdoor connecting wire is connected correctly. (on plural units connection)

P.34

P.35

P.34

P.35

P.37

P.38 P.37 P.35 P.34

P.35

P.36

Detailed

reference

page

OCH671

<Outdoor unit operation monitor function> [When optional 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 check code by controlling DIP SW2 on ‘A-Control Service Tool’. Operation indicator SW2 : Indicator change of self diagnosis

SW2 setting

1ON2 3 4 5 6

Display detail

Explanation for display Unit

(Be sure that 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.

1ON2 3 4 5 6

(Initial setting)

SW2

1 second

interval

LED1

(Lighting)

Display Operation Model

The tens digit : Operation mode

The ones digit : Relay output

O C

Display

0 1 2 3 4 5 6 7 8 A

Compressor

Warming-up Compressor

— — —

— ON ON ON ON

—

— — — — — — —

— ON ON

OFF / FAN

COOLING / DRY *

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.

*C5 is displayed during replacement operation.

(3) When the display blinks Inspection code is displayed when compressor stops due to the work of protection devices.

Display

Contents to be inspected (When power is turned on)

F5 E8 E9 EA Eb EC

E0~E7

63H connector(yellow) is open. Indoor/outdoor communication error (Signal receiving error) (Outdoor unit) Indoor/outdoor communication error (Transmitting error) (Outdoor unit) 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 Communication error except for outdoor unit

Display

Inspection unit

0 1 2 3 4

Outdoor unit Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4

Display

Contents to be inspected (During operation)

U1 U2 U3 U4 U5 U6 U7 U8

Ud UF UH

UL UP

P1~P8 A0~A7

Abnormal high pressure (63H operated) Abnormal high discharging temperature and comp. surface, shortage of refrigerant Open/short circuit of discharge thermistor(TH4) and comp. surface thermistor(TH33) Open/short of outdoor unit thermistors(TH6, TH7 and TH8) Abnormal temperature of heatsink Abnormality of power module Abnormality of superheat due to low discharge temperature Abnormality in outdoor fan motor Overheat protection Compressor overcurrent interruption (When Comp. locked) Current sensor error Abnormal low pressure Compressor overcurrent interruption Abnormality of refrigerant Abnormality of indoor units Communication error of M-NET system

OCH671

SW2 setting

Display detail

Explanation for display Unit

1ON2 3 4 5 6

Discharge temperature (TH4)

−20 to 217

Output step of outdoor FAN 0 to 16

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

Compressor integrating operation times 0 to 9999

−20 to 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 s 0.5 s 2 s

Step

100 times

10 hours

0 to 16

0 to 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 s 0.5 s 2 s

0 to 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 s 0.5 s 2 s

1ON2 3 4 5 6

Compressor operating current 0 to 50

0 to 50 Note: Omit the figures after the decimal fractions.

Error postponement code history (1) of outdoor unit

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

Code

display

Code

display

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

error is displayed by setting SW2 like below.

1ON2 3 4 5 6

(SW2)

1ON2 3 4 5 6

Compressor operating frequency 0 to 255

0 to 9999 (When it is 100 Hz or more, hundreds digit, tens digit and ones digit are displayed by turns. (Example) When 125 Hz;

0.5 s 0.5 s 2 s

0.1 Hz

1ON2 3 4 5 6

The black square ( ) indicates a switch position.

OCH671

SW2 setting

Display detail

Explanation for display Unit

1ON2 3 4 5 6

Discharge temperature (TH4) on error occurring

−20 to 217

Compressor operating current on error occurring 0 to 50

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

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

−20 to 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 s 0.5 s 2 s

Code

display

Code

display

0 to 50

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

1ON2 3 4 5 6

Thermostat ON time 0 to 999

Test run elapsed time 0 to 120

0 to 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 s 0.5 s 2 s

0 to 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 s 0.5 s 2 s

Minute

The black square ( ) indicates a switch position.

OCH671

SW2 setting

1ON2 3 4 5 6

Display detail

Explanation for display

Unit

Capacity setting display

Displayed as an outdoor capacity code.

Code

display

1ON2 3 4 5 6

Outdoor unit setting information

Indoor pipe temperature / Liquid (TH2(1)) Indoor 1

- 39 to 88

Code

display

- 39 to 88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)

1ON2 3 4 5 6

Indoor room temperature (TH1) 8 to 39

Capacity Code SP100Y 20 SP125Y 25 SP140Y 28

Setting details

• The tens digit (Total display for applied setting)

Cooling only

Single phase / 3 phase

Display details

1 : Cooling only

0 :

Single phase

2 :

3-phase

(Example) When the unit is 3-phase and cooling only,

“30” is displayed.

1ON2 3 4 5 6

Indoor pipe temperature / Cond. / Eva. (TH5(1)) Indoor 1

- 39 to 88

- 39 to 88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)

8 to 39

Indoor pipe temperature / Liquid (TH2(2)) Indoor 2

- 39 to 88

Indoor pipe temperature / Cond. / Eva. (TH5(2)) Indoor 2

- 39 to 88

1ON2 3 4 5 6

The number of connected indoor units

Unit

0 to 4 (The number of connected indoor units are displayed.)

The black square ( ) indicates a switch position.

OCH671

1ON2 3 4 5 6

°C

Discharge superheat SHd 0 to 255

SHd = TH4-TH6

0 to 255 (When the temperature is 100 °C or more, hundreds digit, tens digit and ones digit are displayed by turns.)

0.1 A

Input current of outdoor unit

0 to 500 (When it is 100 or more, hundreds digit, tens digit and ones digit are displayed by turns.)

Pulse

LEV-B opening pulse

0 to 480 (When it is 100 pulse or more, hundreds digit, tens digit and ones digit are displayed by turns.)

1ON2 3 4 5 6

SW2 setting

1ON2 3 4 5 6

Display detail

Explanation for display Unit

°C

1ON2 3 4 5 6

Indoor setting temperature 17 to 30

Outdoor 2-phase pipe (TH6)

- 39 to 88

Outdoor heatsink temperature (TH8)

- 40 to 200

17 to 30

°C

- 39 to 88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)

- 40 to 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.)

Outdoor ambient temperature (TH7)

- 39 to 88

- 39 to 88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.)

Normal Overvoltage error Undervoltage error Input current sensor error L

1-phase open error

Abnormal power synchronous signal PFC/error (PUHZ-SP･VKA) (Overvoltage/Undervoltage/Overcurrent) PFC/IGBT error (PUHZ-SP･VKA) Undervoltage

Display examples for multiple errors: Overvoltage (01) + Undervoltage (02) = 03 Undervoltage (02) + Power-sync signal error (08) = 0A L

1 phase open error (04) + PFC error (10) = 14

Description Display

00 01 02

U9 error detail history (latest)

Code

display

1ON2 3 4 5 6

Number of defrost cycles 0 to FFFE

2 cycles

0 to FFFE (in hexadecimal notation) (When more than FF in hex (255 in decimal), the number is displayed in order of 16

's and 162's, and 161's and 160's places. (Example) When 5000 cycles;

0.5 s 0.5 s 2 s

The black square ( ) indicates a switch position.

OCH671

SW2 setting

Display detail

Explanation for display Unit

1ON2 3 4 5 6

Capacity save 0 to 100 When air conditioner is connected to M-NET and capacity save mode is demanded, “0” to ”100” is displayed.

When there is no setting of capacity save “100” is displayed.

0 to 100 (When the capacity is 100% hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 100%;

0.5 s 0.5 s 2 s

Code

display

Error postponement code history (2) of outdoor unit

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

Code

display

Error postponement code history (3) of outdoor unit

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

Code

display

Error history (3) (Oldest) Alternate display of abnormal unit number and code.

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

6: Outdoor 2-phase pipe (TH6) 7: Outdoor ambient temperature (TH7) 8: Outdoor heatsink (TH8)

1ON2 3 4 5 6

Error thermistor display

When there is no error thermistor, “–“ is displayed.

Code

display

Operation frequency on error occurring 0 to 255

0 to 255 (When it is 100Hz or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 125 Hz;

0.5 s 0.5 s 2 s

1ON2 3 4 5 6

Fan step on error occurring 0 to 16

0 to 16

1ON2 3 4 5 6

Step

°C

DC bus voltage 0 to 500 (PUHZ-SP·VKA) 0 to 1000 (PUHZ-SP·YKA)

0 to 500 (PUHZ-SP·VKA) 0 to 1000 (PUHZ-SP·YKA) (When it is 100 V or more, hundreds digit, tens digit and ones digit are displayed by turns.)

1ON2 3 4 5 6

The black square ( ) indicates a switch position.

Indoor room temperature (TH1) on error occurring 8 to 39

8 to 39

1ON2 3 4 5 6

OCH671

SW2 setting

Display detail

Explanation for display Unit

Indoor pipe temperature / Liquid (TH2) on error occurring

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.) (Example) When -15 °C;

0.5 s 0.5 s 2 s

Indoor pipe temperature / Cond./ Eva. (TH5) on error occurring

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.) (Example) When -15 °C;

0.5 s 0.5 s 2 s

Outdoor 2-phase pipe (TH6) on error occurring

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.) (Example) When -15 °C;

0.5 s 0.5 s 2 s

Outdoor ambient temperature (TH7) on error occurring

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.) (Example) When -15 °C;

0.5 s 0.5 s 2 s

Outdoor heatsink temperature (TH8) on error occurring

- 40 to 200

- 40 to 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.)

1ON2 3 4 5 6

The black square ( ) indicates a switch position.

1ON2 3 4 5 6

0 to 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 s 0.5 s 2 s

1ON2 3 4 5 6

Discharge superheat on error occurring SHd 0 to 255

SHd = TH4 - TH6

Thermo-on time until error stops 0 to 999

0 to 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 s 0.5 s 2 s

1ON2 3 4 5 6

Minute

OCH671

SW2 setting

Display detail

Explanation for display Unit

Indoor pipe temperature / Liquid (TH2 (3)) Indoor 3

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.)

Indoor pipe temperature / Cond./ Eva. (TH5 (3)) Indoor 3

- 39 to 88

- 39 to 88 (When the temperature is 0 °C or less, “–” and temperature are displayed by turns.)

When there is no indoor unit, “00” is displayed.

Indoor pipe temperature / Liquid (TH2 (4)) Indoor 4

- 39 to 88

1ON2 3 4 5 6

- 39 to 88 (When the temperature is 0°C or less, “–” and temperature are displayed by turns.)

1ON2 3 4 5 6

Indoor pipe temperature / Cond. / Eva (TH5 (4)) Indoor 4

- 39 to 88

- 39 to 88 (When the temperature is 0°C or less, “–” and temperature are displayed by turns.)

When there is no indoor unit, “00” is displayed.

The black square ( ) indicates a switch position.

Controlling status of compressor operating frequency

1ON2 3 4 5 6

Code

display

The following code will be a help to know the operating status of unit.

Display

Compressor operating frequency control

Display

Compressor operating frequency control

Primary current control Secondary current control

1 2

•

The tens digit

•The ones digit

(In this digit, the total number of

activated control is displayed.)

Preventive control for excessive temperature rise of discharge temperature Preventive control for excessive temperature rise of condensing temperature Frosting preventing control

Preventive control for excessive temperature rise of heatsink

(Example) The following controls are activated.

• Primary current control

• Preventive control for excessive tempe-

rature rise of condensing temperature

• Preventive control for excessive tempe-

rature rise of heatsink

LED

1ON2 3 4 5 6

Comp. surface temperature (TH33)

- 52 to 221

(When the comp. surface thermistor detects 100 °C or more, hundreds digit, tens digit and ones digit are displayed by turns.) (Example) When 105 °C;

0.5 s 0.5 s 2 s

OCH671

10 FUNCTION SETTING

Function

Settings

Mode No.

Setting No.

: Initial setting

(when sent from the factory)

Remarks

Power failure automatic recovery Indoor temperature detecting

LOSSNAY connectivity

Power supply voltage Frost prevention temperature Humidifier 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) 240 V 220 V, 230 V 2: (Normal) 3: When the compressor operates, the humidifier also operates. When the fan operates, the humidifier also operates.

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

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

Meaning of "Function setting" mode02:indoor temperature detecting

Indoor temperature(ta)=

No.1

Average data of the sensor on all the indoor units

Initial setting

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

No.2

The data of the sensor on the indoor unit that connected with remote controller

ta=A ta=B ta=A ta=A

No.3

The data of the sensor on main remote controller.

ta=C ta=C ta=C ta=C

OUTDOOR

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

INDOOR

OUTDOOR

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

OUTDOOR

INDOOR

REMOTE (MAIN)

OUTDOOR

INDOOR

REMOTE (MAIN)

REMOTE (SUB)

INDOOR

10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

Each function can be set as necessary 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>.

<Table 1> Function selections

(1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)

*The function is available only when the wired remote controller is used. The functions is not available for floor standing

models.

(2) Functions available when setting the unit number to 01-02 or AL (07 in case of wireless remote controller) Refer to the service manual that comes with each indoor unit.

OCH671

Main

Main display:

Cursor Page

Main menu

Maintenance Initial setting Service

F1 F2 F3 F4

Service menu

Cursor

Select:

Enter maintenance password

unem ecivreS

rosruC

:unem niaM

Test run Input maintenance info. Function setting Check Self check

Maintenance password Remote controller check

Service menu

Service menu:

Not available.

Please stop the unit.

When the Service menu is selected, a window will appear asking for the pass-

word.

To enter the current maintenance password (4 numerical digits), move the cursor to the digit you want to change with the F1

or F2 button.

Set each number (0 through 9) with the

orF4button.

Then, press the

button.

Select "Service" from the Main menu, and press the button.

*At the main display, the menu button and select "Service" to make the

maintenance setting.

Maintenance password is required

Note: The initial maintenance password is "9999". Change the default

password as necessary to prevent unauthorized access. Have the password available for those who need it.

: If you forget your maintenance password, you can initialize the

password to the default password "9999" by pressing and holding the

and

buttons simultaneously for three seconds on the

maintenance password setting screen.

If the password matches, the Service menu will appear.

The type of menu that appears depends on the connected indoor units’ type.

Note: Air conditioning units may need to be stopped to make certain set-

tings. There may be some settings that cannot be made when the system is centrally controlled.

A screen will appear that indicates the setting has been saved.

Navigating through the screens

• To go back to the Main menu ..................

button

• To return to the previous screen ...............

button

10-1-1. Selecting functions using the wired remote controller <PAR-31MAA>

OCH671

F1 F2 F3 F4

unem ecivreS

rosruC

:unem niaM

Test run Input maintenance info. Function setting Check Self check

F1 F2 F3 F4

Function setting

Cursor Address

Monitor:

Ref. address Unit No.

Grp./1/2/3/4/All

Function setting

Cursor Cursor

Request:

Ref. address Mode 1 Mode 2 Mode 3 Mode 4

Grp.

F1 F2 F3 F4

Function setting

Cursor Cursor

Request:

Ref. address Mode 1 Mode 2 Mode 3 Mode 4

Unit #1

Set the indoor unit refrigerant addresses and unit numbers with the F1

through F4 buttons, and then press the button to confirm the current setting.

Select "Function setting" with the F1

or F2 button, and press the button.

When data collection from the indoor units is completed, the current settings

appears highlighted. Non-highlighted items indicate that no function settings are made. Screen appearance varies depending on the "Unit No." setting.

Use the F1 or F2 button to move the cursor to select the mode number,

and change the setting number with the F3

or F4 button.

Select "Service" from the Main menu, and press the button.

When the

button is pressed, the target indoor unit will start fan operation.

If the unit is common or when running all units, all indoor units for the selected

refrigerant address will start fan operation.

F1 F2 F3 F4

Function setting

Ref. address

Sending data

Grp.

When the settings are completed, press the button to send the setting data from the remote controller to the indoor units.

When the transmission is successfully completed, the screen will return to the Function setting screen.

Notes:

1. Make the above settings only on Mr. Slim units as necessary.

The above function settings are not available for the City Multi units.

Table 1 summarizes the setting options for each mode number. Refer to the

indoor unit Installation Manual for the detailed information about initial settings, mode numbers, and setting numbers for the indoor units.

Be sure to write down the settings for all functions if any of the initial set-

tings has been changed after the completion of installation work.

OCH671

Select mode No. 02

(room temperature detection position).

Select setting No. 03 (remote controller fixed).

(Use

and G.)

Enter the setting.

(Press

Finished

End function display.*

(Press

and B at the same time.)

Example: Selecting room temperature detection position

YES

Selecting functions using the wired remote controller

Check the function selection setting.

*For modes 15 and higher, press

and B at the same time.

Specify refrigerant address 00 (outdoor unit)

Specify unit No. 00. (indoor unit)

(Use

and D.)

Enter the setting.

(Press

(Specified indoor unit: FAN operation)

Change refrigerant address or unit No.

Switch to function setting mode.*

(Press

and B at the same time

with the remote controller stopped.)

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

Modes 01 to 14 can be activated by pressing buttons

and

simultaneously, and modes 15 to 28 by pressing buttons

and J.

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

10-1-2. Selecting functions using the wired remote controller <PAR-21MAA>

OCH671

[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.

Hold down the ( mode is 15 to 28) (A in the picture in the

previous page) and buttons (B in the picture in the previous page)

simultaneously for at least 2 seconds. will start to flash, and then the

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

FILTER

3 Set the outdoor unit's refrigerant address.

Press the [

CLOCK] buttons ( and ) (C in the picture in

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

If the unit stops after

FUNCTION SELECTION

flashed for 2 seconds or "88" flashes 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.

Press the

ON/OFF

button (D in the picture in the previous page) so that

"- -" flashes in the unit number display area.

Press the [

CLOCK] buttons ( and ) (C in the picture in the

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

To set modes 01 to 06 or 15 to 22 select unit number "00". To set modes 07 to 14 or 23 to 28 carry out as follows:

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

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

5 Confirm the refrigerant address and unit number.

Press the button (E in the picture in the previous page) to confirm

MODE

the refrigerant address and unit number. After a while, "- - " will start to flash in the mode number display area.

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

MODE

button (E in the picture in the previous page), the corresponding

indoor unit will start fan operation. This helps you find the location of the indoor unit for which you want to perform function selection. However, if "00" or "AL"

is selected as the unit number, all the indoor units corresponding to the specified

refrigerant address will start fan operation.

"88" will flash in the room temperature display area if the selected refrigerant address does not exist in the system. Furthermore, if

"F"

appears and flashes in the unit number display area and the refrigerant address display area also flashes, there are no units that correspond to the selected unit number. In this case, the refrigerant address and unit number may be incorrect, so repeat steps 2 and 3 to set the correct ones.

When grouping different refrigerant systems, if an indoor unit other than the one to which the refrigerant address has been set performs fan operation, there may be another refrigerant address that is the same as the specified one. In this case, check the DIP switch of the outdoor unit to see whether such a refrigerant address exists.

6 Select the mode number.

Press the [

TEMP] buttons ( and ) (F in the picture in the

previous page) to set the desired mode number. (Only the selectable mode numbers can be selected.)

7 Select the setting content for the selected mode.

Press the

button (G in the picture in the previous page).

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

Press the [

TEMP] buttons ( and ) (F in the picture in the

previous page) to select the desired setting number.

8 Register the settings you have made in steps 3 to 7 .

Press the

MODE

button (E in the picture in the previous page).

The mode number and setting number will start to flash and registration starts.

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

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

" flashes 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.

0 Complete function selection.

Hold down the ( mode is 15 to 28) (A in the picture

in the previous page) and buttons simultaneously for at least 2 seconds.

FILTER

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.

Refrigerant address display section

Unit number display section

Mode number display section

00 refrigerant address

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

Mode number display section

Mode number 02 = Indoor temperature detection

Setting number display section

Setting number 3 = Remote controller built-in sensor

Setting number 1 = Indoor unit operating average

TEST

FUNCTION SELECTION

TEST

Outdoor unit

Indoor unit

No. 02No. 01

Remote controller

Fan mode

Confirm

No. 03

To make additional settings in the FUNCTION SELECTION screen, repeat the steps 3 through 8. Note. After setting the modes 07 through 14, the modes 23 through 28 cannot be set continuously, or vice versa. In this case, after completing the settings for the modes 07 through 14 or 23 through 28, go to the step 10 to finish setting, and restart setting from the step 1. At this point, wait for 30 seconds or more before restarting setting. Otherwise, the temperature may indicate “88”.

OCH671

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

CHECK

RESET

SET

CLOCK

Flow of function selection procedure

The flow of the function selection procedure is shown below. This example shows how to turn off the function that raises the set temperature by 4 degrees during HEAT operation. (Mode 24: 2) The procedure is given after the flow chart.

1 Check the function selection setting.

2 Switch to function selection mode.

(Enter address "50" in check mode,

then press the button.)

Check mode is the mode entered when you press the CHECK button twice to display "CHECK".

3 Specify unit No. "01" (since the function applies to unit 01). (Set address "01" while still in check mode, then press the button.) Note: You cannot specify the refrigerant address.

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

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

Finished

8 End function selection mode. (End check mode.)

YES

Note: When you switch to function selection mode on the wireless remote controller's operation area, the unit ends function selection mode automatically if nothing is input for 10 minutes or longer.

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

Change unit No.

YES

min

[Flow of function selection procedure]

10-1-3. 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.

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.

[Operating instructions]

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

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press the button. 3 Set the unit number. Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.) Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

Notes: 1

. 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.

2. 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 °C 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) Notes:

1. 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.

2. If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode number. 5 Select the setting number. Press the temp button to select the setting number. (02: Not available) Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

→ The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.

Setting number: 1 = 2 beeps (0.4 seconds each) 2 = 2 beeps (0.4 seconds each, repeated twice) 3 = 2 beeps (0.4 seconds each, repeated 3 times) * If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting. * If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.

6 Repeat steps 4 and 5 to make an additional setting without changing unit number. 7 Repeat steps 3 to 5 to change unit number and make function settings on it. 8 Complete the function settings

Press button. Note: Do not use the wireless remote controller for 30 seconds after completing the function setting.

CHECK

min

OCH671

Function buttons

F1 F2 F3 F4

Press to turn ON/OFF the indoor unit.

ON / OFF button

When the backlight is off, pressing any button turns the backlight on and does not perform its function. (except for the

(ON / OFF) button)

The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.

Press to save the setting.

SELECT button

Press to return to the previous screen.

RETURN button

Press to bring up the Main menu.

MENU button

Operation settings will appear. When the backlight is off, pressing any button turns the backlight on and it will stay lit for a certain period of time depending on the screen.

Backlit LCD

This lamp lights up in green while the unit is in operation. It blinks while the remote controller is starting up or when there is an error.

ON / OFF lamp

Main display : Press to change the operation mode. Main menu : Press to move the cursor down.

Function button

Main display : Press to decrease temperature. Main menu : Press to move the cursor up.

Function button

Main display : Press to increase temperature. Main menu : Press to go to the previous page.

Function button

Main display : Press to change the fan speed. Main menu : Press to go to the next page.

Function button

Fri

Room

Set temp.

Mode Temp. Fan

Cool Auto

Main

Main display:

Cursor Page

Main menu

Vane·Louver·Vent. (Lossnay) High power Timer Weekly timer OU silent mode

Function guide

10-2. FUNCTION SELECTION OF REMOTE CONTROLLER

10-2-1. PAR-31MAA

OCH671

Not all functions are available on all models of indoor units.

Night setback

Energy saving

Auto return

Schedule

Error information

Filter information

Main menu

Press the

button.

Move the cursor to the desired item with the

and

buttons, and press the

SELECT

button.

Vane · Louver · Vent. (Lossnay)

High power

Weekly timer

Restriction

Maintenance

Initial setting

On / Off timer

Auto-Off timer

Temp. range

Operation lock

Manual vane angle

Main / Sub

Timer

Main display

Contrast

Display details

Auto mode

Administrator password

Language selection

Service

Service menu

Input maintenance info.

Function setting

Lossnay (City Multi only)

Check

Self check

Maintenance password

Remote controller check

Auto descending panel

Test run

Clock

Drain pump test run

OCH671

Setting and display items Setting details

Vane · Louver · Vent. (Lossnay)

Use to set the vane angle.

• Select a desired vane setting from ve different settings.

Use to turn ON / OFF the louver.

• Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.

• Select a desired setting from "Off," "Low," and "High."

High power Use to reach the comfortable room temperature quickly.

• Units can be operated in the High-power mode for up to 30 minutes.

Timer On/Off timer* Use to set the operation On/Off times.

• Time can be set in 5-minute increments.

Auto-Off timer Use to set the Auto-Off time.

• Time can be set to a value from 30 to 240 in 10-minute increments.

Filter information Use to check the lter status.

• The lter sign can be reset.

Error information Use to check error information when an error occurs.

• Check code, error source, refrigerant address, unit model, manufacturing number, contact

information (dealer's phone number) can be displayed.

( The unit model, manufacturing number, and contact information need to be registered in

advance to be displayed.)

Weekly timer* Use to set the weekly operation On / Off times.

• Up to eight operation patterns can be set for each day. (Not valid when the On/Off timer is enabled.)

Energy saving

Auto return Use to get the units to operate at the preset temperature after performing energy-save

operation for a specied time period.

• Time can be set to a value from 30 and 120 in 10-minute increments.

(This function will not be valid when the preset temperature ranges are restricted.)

Schedule* Set the start/stop times to operate the units in the energy-save mode for each day of the week,

and set the energy-saving rate.

• Up to four energy-save operation patterns can be set for each day.

• Time can be set in 5-minute increments.

• Energy-saving rate can be set to a value from 0% and 50 to 90% in 10% increments.

Night setback* Use to make Night setback settings.

• Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and

the start/stop times can be set.

Restriction Temp. range Use to restrict the preset temperature range.

• Different temperature ranges can be set for different operation modes.

Operation lock

Use to lock selected functions.

• The locked functions cannot be operated.

Maintenance

Auto descending panel

Auto descending panel (Optional parts) Up / Down you can do.

Manual vane angle

Use to set the vane angle for each vane to a xed position.

Initial setting Main/Sub When connecting two remote controllers, one of them needs to be designated as a sub

controller.

Clock Use to set the current time.

Main display Use to switch between "Full" and "Basic" modes for the Main display.

• The initial setting is "Full."

Contrast Use to adjust screen contrast.

* Clock setting is required.

OCH671

Setting and display items Setting details

Initial setting Display

details

Make the settings for the remote controller related items as necessary. Clock: The initial settings are "Yes" and "24h" format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display.

Auto mode Whether or not to use the AUTO mode can be selected by using the button.

This setting is valid only when indoor units with the AUTO mode function are connected.

Administrator password

The administrator password is required to make the settings for the following items.

• Timer setting • Energy-save setting • Weekly timer setting

• Restriction setting • Outdoor unit silent mode setting • Night set back

Language selection

Use to select the desired language.

Service Test run Select "Test run" from the Service menu to bring up the Test run menu.

• Test run • Drain pump test run

Input maintenance

Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen.

• Model name input • Serial No. input • Dealer information input

Function setting

Make the settings for the indoor unit functions via the remote controller as necessary.

LOSSNAY setting (City Multi only)

This setting is required only when the operation of City Multi units is interlocked with LOSSNAY units.

Check Error history: Display the error history and execute "delete error history".

Refrigerant leak check: Refrigerant leaks can be judged. Smooth maintenance: The indoor and outdoor maintenance data can be displayed. Request code: Details of the operation data including each thermistor temperature and error his-

tory can be checked. Self check Error history of each unit can be checked via the remote controller. Maintenance

password

Use to change the maintenance password.

Remote controller check

When the remote controller does not work properly, use the remote controller checking function

to troubleshoot the problem.

OCH671

OFF

no1

no2

OFF

CALL-

OFF

°C

°F

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

English

German

Spanish

Russian

Italian

Chinese

French

Japanese

Item 3

Item 2Item 1

Hold down the E button and press the D button for 2 seconds.

Remote controller function selection mode

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

Dot display

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

Setting language (English)

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.

Change Language

Function selection

Mode selection

Display mode setting

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

The automatic mode is displayed when the operation mode is selected. (Initial setting value)

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

The temperature range limit is not active. (Initial setting value)

The temperature range can be changed on cooling/dry mode

The temperature range can be changed on heating mode.

The temperature range can be changed on automatic mode.

The remote controller will be the main controller. (Initial setting value)

The remote controller will be the sub controller.

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

The clock function cannot be used.

Weekly timer can be used. (Initial setting value)

Auto off timer can be used.

Simple timer can be used.

Timer mode cannot be used.

The set contact numbers are not displayed in case of error. (Initial setting value)

The set contact numbers are displayed in case of error.

The temperature unit °C is used. (Initial setting value)

The temperature unit °F is used.

Room air temperature is displayed. (Initial setting value)

Fixed air flow direction mode

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

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.

C D

All operation buttons except On/Off button are locked.

All operation buttons are locked.

10-2-2. PAR-21MAA

OCH671

The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed.

Item 1

1.Change Language ("CHANGE LANGUAGE")

2.Function limit ("FUNCTION SELECTION")

3.Mode selection ("MODE SELECTION")

4.Display change ("DISP MODE SETTING")

Item 3 (Setting content)

• Display in multiple languages is possible.

• Setting the range of operation limit (operation lock)

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

• Setting the temperature adjustable range (maximum, minimum)

• Selecting main or sub remote controller

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

• Setting the use or non-use of clock function

• Setting the timer type

• Contact number display in case of error

• Setting the telephone number

• Setting the temperature unit (: or °F) to display

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

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

operation with automatic mode

Item 2

Language setting to display

(1)

Operation function limit setting (operation lock) ("LOCKING FUNCTION")

(2)

Use of automatic mode setting ("SELECT AUTO MODE")

(3)

Temperature range limit setting ("LIMIT TEMP FUNCTION")

(1)

Remote controller main/sub setting ("CONTROLLER MAIN/SUB")

(2) Use of clock setting ("CLOCK") (3) Timer function setting ("WEEKLY TIMER")

(4) Contact number setting for error situation ("CALL.")

(1) Temperature display :/

°F setting ("TEMP MODE :/°F")

(2)

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

(3)

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

[Function selection flowchart] Refer to next page.

[1] Stop the air conditioner to start remote controller function selection mode. → [2] Select from item1. [3] Select from item2. [4] Make the setting. (Details are specified in item3) [5] Setting completed. [6] Change the display to the normal one. (End)

→→

→ →

[Detailed setting] [4] -1. CHANGE LANGUAGE setting

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

• Press the [

MENU] button to change the language.

1 Japanese (JP), 2 English (GB), 3 German (D), 4 Spanish (E), 5 Russian (RU), 6 Italian (I), 7Chinese (CH), French (F)

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

• To switch the setting, press the [ ON/OFF] button. 1 no1 : All operation buttons except [ ON/OFF] button are

locked.

2 no2 : All operation buttons are locked. 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 the normal screen after the above setting is made..

(2) Use of automatic mode setting

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

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

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

the operation mode is selected.

2 OFF : The automatic mode is not displayed

when the operation mode is selected.

[4] -3. Mode selection setting

(1) Remote controller main/sub setting

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

1 Main : The controller will be the main controller. 2 Sub : The controller will be the sub controller.

(2) Use of clock setting

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

1 ON : The clock function can be used. 2 OFF : The clock function cannot be used.

(3) Timer function setting

• To switch the setting, press the [

ON/OFF] button (Choose one of

the following.).

1 WEEKLY TIMER (initial setting):

The weekly timer can be used.

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

SIMPLE TIMER:

The simple timer can be used.

43TIMER MODE OFF: The timer mode cannot be used.

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

used.

(4) Contact number setting for error situation

• To switch the setting, press the [

ON/OFF] button.

1 CALL OFF:

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

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

of error.

(3) Temperature range limit setting

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

set range.

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

1 LIMIT TEMP COOL MODE :

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

2 LIMIT TEMP HEAT MODE :

The temperature range can be changed on heating mode.

3 LIMIT TEMP AUTO MODE :

The temperature range can be changed on automatic mode.

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

When the setting, other than OFF, is made, the temperature range limit setting on cooling, heating and automatic mode is made at the same time. However

the range cannot be limited when the set temperature range has not changed.

•

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

•

To switch the upper limit setting and the lower limit setting, press the

[ ]

button. The selected setting will flash and the temperature can be set.

• Settable range

Cooling/Dry mode : Lower limit: 19 : ~ 30 : Upper limit: 30 : ~ 19 : Heating mode : Lower limit: 17 : ~ 28 : Upper limit: 28 : ~ 17 : Automatic mode : Lower limit: 19 : ~ 28: Upper limit: 28 : ~ 19:

CALL_ : The contact number can be set when the display is as

shown on the left.

• Setting the contact numbers To set the contact numbers, follow the following procedures. Move the flashing cursor to set numbers. Press the [

TEMP. ( ) and

(

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

(

) and ( )] button to set the numbers.

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

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

1 : : The temperature unit : is used. 2 °F : The temperature unit °F is used.

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

(3) Automatic cooling/heating display setting

• To switch the setting, press the [ ON/OFF] button. 1 ON : One of "Automatic cooling" and "Automatic heating" is displayed

under the automatic mode is running.

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

(2) Room air temperature display setting

1 ON : The room air temperature is displayed.

2 OFF : The room air temperature is not displayed.

OCH671

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

Details on the operation data including each thermistor temperature and error history can be conrmed with the remote controller.

F1 F2 F3 F4

Check menu

Cursor

Service menu:

Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Request code

Select "Request code" with the F1 or F2 button, and press the button.

Select "Check" with the F1

or F2 button, and press the button.

Set the Refrigerant address and Request code.

Select the item to be changed with the

orF2button.

Select the required setting with the

button.

■

<Ref.address>setting [ 0 ] – [ 15 ]

■

<Request code>setting

Press the

button, Data will be collected and displayed.

F1 F2 F3 F4

Request code

Request:

Request code

Ref.address

Request code

Cursor −＋

Ref.address

Request code

Cursor

−＋

Request code: 004 Discharge temperature: 69˚C

Data display

Relay output state

C 4

Operation mode

<Operation state> (Request code "0")

Select "Service" from the Main menu, and press the button.

11-1. HOW TO "MONITOR THE OPERATION DATA"

11-1-1. PAR-31MAA

1) Operation mode

Display Operation mode

0 STOP • FAN

C COOL • DRY

H HEAT

d Defrost

2) Relay output state

Display

Power currently

supplied to compressor

Compressor Four-way valve Solenoid valve

0 — — — —

1 ON

2 ON

3 ON ON

4 ON

5 ON ON

6 ON ON

7 ON ON ON

8 ON

A ON ON

OCH671

12-1. HOW TO "MONITOR THE OPERATION DATA"

• Turn on the [Monitoring the operation data]

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(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

) when [Maintenance monitor] is activated.

(The display (at

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

(3) Press the [TEMP] buttons (

and ) to select the desired refrigerant address.

[Screen

]

(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

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

CHECK

button for 3 seconds to return to maintenance mode.

(7) To return to normal mode, press the

ON/OFF

button.

Example) Request code "004"

Discharge temperature 69°C Refrigerant address "00"

B: Refrigerant address

A: Maintenance mode

C: Data display area D: Request code display area

[

11-1-2. PAR-21MAA

OCH671

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

Request code

Request content

Description

(Display range)

Unit Remarks

Operation state

Compressor-Operating current (rms)

Compressor-Accumulated operating time

Compressor-Number of operation times

Discharge temperature (TH4)

Outdoor unit - Liquid pipe 2 temperature

Outdoor unit-2-phase pipe temperature (TH6)

Outdoor unit-Ambient temperature (TH7)

Outdoor unit-Heatsink temperature (TH8)

Discharge superheat (SHd)

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 (B) opening

Primary current

DC bus voltage

Number of connected indoor units

Indoor unit-Setting temperature

Indoor unit-Intake air temperature <Measured by thermostat>

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

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

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

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

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 "11-2-1.Detail Contents in Request Code".

0 – 50

0 – 9999

3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255

0 – 10

0 – 9999

0 – 500

0 – 50

180 – 370

0 – 4

17 – 30

8 – 39

-39 – 88

0 – 999

0 – 120

–

10 hours

100 times

: :

Step

rpm

Pulses

Units

: :

: : : :

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.

11-2. Request code list

OCH671

Request code

Request content

Description

(Display range)

Unit Remarks

100

101

102

Indoor unit-Control state

Outdoor unit-Control state

Compressor-Frequency control state

Outdoor unit-Fan control state

Actuator output state

Error content (U9)

Signal transmission demand capacity

Contact demand capacity

External input state (silent mode, etc.)

Outdoor unit-Capacity setting display

Outdoor unit-Setting information

Outdoor unit-SW1 setting information

Outdoor unit-SW2 setting information

Outdoor unit-SW4 setting information

Outdoor unit-SW5 setting information

Outdoor unit-SW6 setting information

Outdoor unit-SW7 setting information

Outdoor unit-SW8 setting information

Outdoor unit-SW9 setting information

Outdoor unit-SW10 setting information

M-NET adapter connection (presence/absence)

Display of execution of replace/wash operation

Outdoor unit-Microprocessor version information

Outdoor unit-Microprocessor version information (sub No.)

Outdoor unit - Error postponement history 1 (latest)

Outdoor unit - Error postponement history 2 (previous)

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

0 – 255

Refer to "11-2-1.Detail Contents in Request Code".

"0000": Not connected

Examples) Ver 5.01

→

Auxiliary information (displayed after

version information)

Examples) Ver 5.01 A000

→

Displays postponement code. (" - - " is

displayed if no postponement code is present)

Displays postponement code. (" - - " is

displayed if no postponement code is present)

Displays postponement code. (" - - " is

displayed if no postponement code is present)

–

Ver

–

Code

Refer to "11-2-1.Detail Contents in Request Code".

"0001": Connected

"0000": Not washed "0001": Washed

"0501"

"A000"

OCH671

Request code

Request content

Description

(Display range)

Unit Remarks

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

146

147

148

149

150

151

152

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

6 : TH6

7 : TH7

8 : TH8

0 : No thermistor error

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

0 – 50

0 – 9999

3 – 217

-40 – 90

-39 – 88

-40 – 200

0 – 255

0 – 10

0 – 9999

0 – 500

0 – 999

-39 – 88

Code

Sensor

number

–

10 hours

100 times

: :

: : :

Step

rpm

Pulses

Minutes

: : :

"0" is displayed if the air conditioner is a single-

fan type.

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

tioner consists of 2 or more indoor units (twin, triple, quad).

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

tioner consists of 2 or more indoor units (twin, triple, quad).

Error history 1 (latest)

Error history 2 (second to last)

Error history 3 (third to last)

Abnormal thermistor display

(TH6/TH7/TH8)

Operation mode at time of error

Compressor-Operating current at time of error

Compressor-Accumulated operating time at time of error

Compressor-Number of operation times at time of error

Discharge temperature at time of error

Outdoor unit - Liquid pipe 2 temperature at time of error

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

Outdoor unit-Ambient temperature (TH7) at time of error

Outdoor unit-Heatsink temperature (TH8) at time of error

Discharge superheat (SHd) at time of error

Compressor-Operating frequency at time of error

Outdoor unit at time of error

• Fan output step

Outdoor unit at time of error

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

Outdoor unit at time of error

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

LEV (B) opening at time of error

Thermostat ON time until operation stops due to error

Indoor - Liquid pipe temperature at time of error

Indoor - Cond/Eva. pipe temperature at time of error

Indoor at time of error

• Intake air temperature <Thermostat judge temperature>

Indoor - Actual intake air temperature

Indoor - Liquid pipe temperature

Indoor - Cond/Eva. pipe temperature

U9: Error history detailed codes

01 – 20

—

OCH671

Request code

Request content

Description

(Display range)

Unit Remarks

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

189

190

191

0 – 9999

0 –

255

Fan control data

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

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

Undefined

Examples) Ver 5.01

→ "0501"

Auxiliary information (displayed after version information) Examples) Ver 5.01 A000 → "A000"

1 hour

10 hours

–

Ver

–

For indoor fan phase control

For indoor fan pulsation control

For indoor DC brushless motor control

Indoor-Fan operating time

(After filter is reset)

Indoor-Total operating time

(Fan motor ON time)

Indoor fan output value (Sj value)

Indoor fan output value

(Pulsation ON/OFF)

Indoor fan output value (duty value)

Indoor unit-Capacity setting information

Indoor unit-SW3 information

Wireless pair No. (indoor control board side) setting

Indoor unit-SW5 information

Indoor unit-Microprocessor version information

Indoor unit-Microprocessor version information (sub No.)

Refer to "11-2-1.Detail Contents in Request Code".

OCH671

Frequency control state

Display

Discharge temperature

Condensation temperature

Anti-freeze

Heatsink temperature

overheat prevention

protection control

overheat prevention 0 1 Controlled 2 Controlled 3 Controlled Controlled 4 Controlled 5 Controlled Controlled 6 Controlled Controlled 7 Controlled Controlled Controlled 8 Controlled 9 Controlled Controlled

A Controlled Controlled

b Controlled Controlled Controlled

C Controlled Controlled

d Controlled Controlled Controlled

E Controlled Controlled Controlled

F Controlled Controlled Controlled Controlled

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

Data display

Example) Request code "004"

Discharge temperature 69 : Refrigerant address "00"

B: Refrigerant address

A: Maintenance mode display

C: Data display area D: Request code display area

Relay output state

Operation mode

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

Data display

Operation mode

Unit No. 4 state

Unit No. 3 state

Unit No. 2 state

Unit No. 1 state

Display State

0 Normal 1 Preparing for heat operation 2 – 3 – 4 Heater is ON. 5 Anti-freeze protection is ON. 6 Overheat protection is ON. 7 Requesting compressor to turn OFF F There are no corresponding units.

[Outdoor unit – Control state] (Request code :" 51")

Data display State 0 0 0 0 Normal 0 0 0 1 Preparing for heat operation 0 0 0 2 Defrost

[Compressor – Frequency control state] (Request code :" 52")

Data display

Frequency control state

Display Current limit control

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

Display Operation mode

0 STOP • FAN C COOL • DRY H HEAT

d DEFROST

Relay output state

Display

Power currently

Compressor Four-way valve Solenoid valve

supplied to compressor

–

ON ON

0 1 2 3 4 5 6 7 8 A

–

ON ON ON ON

–

ON ON

–

11-2-1. Detail Contents in Request Code

OCH671

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

Data display

Fan step correction value by heatsink temperature overheat prevention control

Fan step correction value by cool condensation temperature overheat prevention control

Display Correction value

- (minus) – 1 00

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

Data display

Actuator output state 1

Actuator output state 2

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

Data display

Error content 1

Error content 2

Error content 1 : Detected

Display

Overvoltage Undervoltage L

1-phase

Power synchronizing

error error open error

signal error 0 1 2 3 4 5 6 7 8 9 A b C d E F

Error content 2 : Detected

Display

Converter Fo

PAM error

error 0 1 2 3

Note: Refer to “9-4. SELF-DIAGNOSIS ACTION TABLE” for more information.

Actuator output state 1

Display SV1 Four-way valve Compressor

0 1

2 3

4 5

6 7

8 9

A b

C d E F

ON ON

ON ON ON ON

ON ON

ON ON ON ON

Actuator output state 2

Display 52C SV2 SS

0 1

2 3 4 5 6 7

ON ON

ON ON ON ON

Compressor is

warming up

OCH671

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

Data display

000

Setting content

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

Data display

000

Input state

Input state : Input present

Display

Contact demand Silent mode Spare 1 Spare 2

input input input input 0 1 2 3 4 5 6 7 8 9 A b C d E F

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

Data display

Capacity

10 48

25 42

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

Data display

Setting information 1

Setting information 2

Setting content

Display Setting value

0 1 50% 2 75%

3 100%

Model

SP42 SP48

Setting information 1

Display Defrost mode

0 Standard 1 For high humidity

Setting information 2

Display

Single-/ Heat pump/

3-phase

cooling only

Single-phase

Heat pump

Cooling only

3-phase

Heat pump

Cooling only

OCH671

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

"163"

)

Data display

See the table on the right.

Display Capacity setting state Display Capacity setting state

00 10 42 01 11 02 12 48 03 13 04 14 05 15 06 16 07 17 08 18 09 19

0A 1A

0b 1b

0C 1C

0d 1d

0E 1E

0F 1F

Display Pair No. setting state

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

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

Data display

See the table on the right.

OCH671

12-1. SMOOTH MAINTENANCE

12-1-1. PAR-30MAA/PAR-31MAA

Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”.

This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models.

F1 F2 F3 F4

Check menu

Cursor

Service menu:

Error history Refrigerant volume check Refrigerant leak check Smooth maintenance Request code

Smooth maintenance

Begin:

Smooth maintenance

Exit:

Ref.address Stable mode

Cursor

−

Address

＋

Ref.address Stable mode

Stabilization→Collecting

Cool / Heat/ Normal

Smooth maintenance

Return:

Smooth maintenance

Return:

Smooth maintenance

Return:

Page

COMP. current COMP. run time COMP. On / Off COMP. frequency

Hr times

Ref. address

Cool

Ref.address

Cool

Ref.address

Cool

Sub cool OU TH4 temp. OU TH6 temp. OU TH7 temp.

IU air temp. IU HEX temp. IU filter time

Select "Smooth maintenance" with the F1 or F2 button, and press the button.

Select "Check" with the F1

or F2 button, and press the button.

Select "Service" from the Main menu, and press the

button.

Set each item.

Select the item to be changed with the

F1orF2

button.

Select the required setting with the

button.

■

<Ref.address>setting [ 0 ]~[ 15 ]

■

<Stable mode>setting [ Cool ] / [Heat] / [ Normal ]

Press the

button, Fixed operation will start.

Note: Stable mode will take approx. 20 minutes.

The operation data will appear.

The Compressor-Accumulated operating (COMP. run) time is 10-hour unit, and the Compressor-Number of operation times (COMP. On / Off) is a 100-time unit (fractions discarded).

Navigating through the screens

• To go back to the Main menu ..........

button

• To return to the previous screen .......

button

12 EASY MAINTENANCE FUNCTION

100

OCH671

12-1-2. PAR-21MAA

Slide

Service panel

● 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.

If you are going to use <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.

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

C B

Operation mode

Compressor information

Outdoor unit information

Indoor unit information

Confirm

Activate/cancel maintenance mode

■ Remote controller button information

(1) Press the

TEST

button for 3 seconds to switch to maintenance mode.

[Display

]

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

]

(3) Press the

FILTER

( ) button to confirm the setting.

[Display

] Waiting for stabilization

Stabilized

After 10 to 20 minutes

Discharge temperature 64°C

Remove the service panel.

Measure the intake air temperature.

Measure the discharge temperature.

Measure the outside air temper

ature.

●Indoor unit ●

●Outdoor unit ●

Smooth Maintenance Function

● Conventional inspection work

Easy maintenance information (unit)

Compressor Outdoor unit Indoor unit

Accumulated operating

Heat exchanger

Intake air

time

(o10 hours) temperature (:) temperature (:)

Number of ON/OFF Discharge

963

Heat exchanger

times (o10 times) temperature (:) temperature ( :)

Operating Outside air Filter operating current (A) temperature ( :) time* (Hours)

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

HEAT STABLE MODE

STABLE MODE CANCEL

COOL STABLE MODE

Stable cooling operation

Stable heating operation

Stable operation cancellation

Mitsubishi PUHZ-SP100YKA, PUHZ-SP125VKA.TH, PUHZ-SP125YKA, PUHZ-SP125YKA.TH, PUHZ-SP140YKA.TH Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual