service manual r410a

SPLIT-TYPE, AIR TO WATER HEAT PUMP

SERVICE MANUAL

R410A

Outdoor unit

[Model Name]

PUHZ-SW160YKA

PUHZ-SW200YKA

Salt proof model

PUHZ-SW160YKA-BS


August 2015

No. OCH583

REVISED EDITION-A

[Service Ref.]

PUHZ-SW160YKA.UK

PUHZ-SW160YKAR1.UK



PUHZ-SW160YKA-BS.UK

PUHZ-SW160YKAR1-BS.UK



Revision:

• PUHZ-SW160YKAR1.UK,

PUHZ-SW160YKAR1-BS.UK,

PUHZ-SW200YKAR1.UK and

PUHZ-SW200YKAR1-BS.UK

in REVISED EDITION-A.

• Some descriptions have been modified.

• Please void OCH583.

Note:

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

CONTENTS

TECHNICAL CHANGES ······························ 2

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

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

3. FEATURES ············································ 6

4. SPECIFICATIONS ··································· 7

5. DATA ···················································· 8

6. OUTLINES AND DIMENSIONS ················ 11

7. WIRING DIAGRAM ································ 12

8. WIRING SPECIFICATIONS ····················· 13

9. REFRIGERANT SYSTEM DIAGRAM ··········· 15

10. TROUBLESHOOTING ···························· 17

11. DISASSEMBLY PROCEDURE ················· 60

PARTS CATALOG (OCB583)

TECHNICAL CHANGES

Service ref. have been changed as follows.

PUHZ-SW160YKA(-BS).UK


PUHZ-SW160YKAR1(-BS).UK


1. A compliance with ErP directive Lot1 has been authorized.

1 REFERENCE MANUAL

INDOOR UNIT SERVICE MANUAL

Model Name

ERSE-YM9EC

ERSE-MEC

EHSE-YM9EC

EHSE-MEC

PAC-IF012B-E

PAC-IF021B-E

PAC-IF032B-E

PAC-SIF051B-E

PAC-IF061B-E

PAC-IF062B-E

PAC-IF063B-E

Service Ref.

ERSE-YM9EC.UK

ERSE-YM9ECR1.UK

ERSE-MEC.UK

ERSE-MECR1.UK

EHSE-YM9EC.UK

EHSE-YM9ECR1.UK

EHSE-MEC.UK

EHSE-MECR1.UK

PAC-IF012B-E

PAC-IF021B-E

PAC-IF032B-E

PAC-SIF051B-E

PAC-IF061B-E

PAC-IF062B-E

PAC-IF063B-E

Service

Manual No.

OCH590

OCB590

OCB427

OCB536

OCB572

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

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

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 beaker.

• 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.

OCH583A 2

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.

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.

Use a vacuum pump with a reverse flow check valve.

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

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

The following tools are necessary to use R410A refrigerant.

Gauge manifold

Charge hose

Gas leak detector

Torque wrench

Tools for R410A

Flare tool

Size adjustment gauge

Vacuum pump adaptor

Electronic refrigerant charging scale

Store the piping 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.

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.

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.

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 the specified refrigerant only.

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.

Do not use refrigerant other than R410A.

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

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

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.

(2) Do not release refrigerant in the air.

(3) After completing service, charge the cycle with specified amount of refrigerant.

(4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

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

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

Unit

OCH583A

Gravimeter

3

[3] Service tools

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

No.

1

2

3

4

5

6

7

8

Gauge manifold

Tool name

Charge hose

Electronic scale

Gas leak detector

Adaptor for reverse flow check

Refrigerant charge base

Refrigerant cylinder

Refrigerant recovery equipment

Specifications

· Only for R410A

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

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

· Only for R410A

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

—

· Use the detector for R134a, R407C or R410A.

· Attach on vacuum pump.

—

· Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

—

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

(1) Flowchart

• Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter drier.

• If the diameter of the existing pipes is different from the specified diameter, refer to technological data materials to confirm if the pipes can be used.

The existing pipe thickness meets specifications and the pipes are not damaged.

Measure the existing pipe thickness and check for damage.

The existing pipe thickness does not meet specifications or the pipes are damaged.

Check if the existing air conditioner can operate.

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

• If the existing air conditioner cannot operate, use a

refrigerant recovery device to collect the refrigerant.

Disconnect the existing air conditioner from the pipes.

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

Attach the new air conditioner

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

The existing pipes cannot be reused.

Use new pipes.

(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.)

Diagram below: Piping diameter and thickness

Nominal dimensions (in)

1/4

3/8

1/2

5/8

3/4

Outside diameter (mm)

6.35

9.52

12.70

15.88

19.05

Thickness (mm)

R410A

0.8

0.8

0.8

1.0

—

R22

0.8

0.8

0.8

1.0

1.0

OCH583A 4

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.

Dimension A

Dimension B

Flare cutting dimensions


1/4

3/8

1/2

5/8

3/4

Outside diameter

6.35

9.52

12.70

15.88

19.05

Dimension A ( )

(mm) R410A

(mm)

R22

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Flare nut dimensions


1/4

3/8

1/2

5/8

3/4

Outside diameter

6.35

9.52

12.70

15.88

19.05

(mm)

Dimension B (mm)

R410A

17.0

22.0

26.0

29.0*

—

R22

17.0

22.0

24.0

27.0

36.0

3

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

Tools and materials

Gauge manifold

Charge hose

Gas leak detector

Refrigerant recovery equipment

Refrigerant cylinder

Applied oil

Use

Air purge, refrigerant charge and operation check

Gas leak check

Refrigerant recovery

Refrigerant charge

Apply to flared section

R410A tools

Tool exclusive for R410A


Tool for HFC refrigerant



Ester oil and alkylbenzene oil (minimum amount)

Tool exclusive for R410A 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

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


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






: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)

: Tools for other refrigerants can be used under certain conditions.

: Tools for other refrigerants can be used.

Can 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)

2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL

Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the performance of the unit.

1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.

2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by rainwater. (If a sunshade is installed, rainwater may not clean the panel.)

3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water collecting in the base of the outdoor unit could cause rust.

4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.

5. If the unit is damaged during installation or maintenance, be sure to repair it.

6. Be sure to check the condition of the unit regularly.

7. Be sure to install the unit in a location with good drainage.

OCH583A 5

3 FEATURES

PUHZ-SW160YKA

PUHZ-SW200YKA



CHARGELESS SYSTEM

PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT

Maximum 30 m

The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver/ accumulator always control the optimal refrigerant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during installation often causes problems. It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

OCH583A 6

4 SPECIFICATIONS

Service Ref.

Power supply (phase, cycle, voltage)

Max. current

External finish

Refrigerant control

Compressor

Model

Motor output

Starter type

Protection devices

A kW

Crankcase heater

Heat exchanger

Fan Fan (drive) o No.

Fan motor output

Airflow

Defrost method

Noise level (SPL)

Dimensions

Weight

Refrigerant

Charge

Oil (Model)

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

W kW

K/min(CFM)

Cooling

Heating

W

D

H dB dB mm (in) mm (in) mm (in) kg (lb)

Liquid

Gas

Indoor side

Outdoor side

Height difference

Piping length kg (lb)

L mm (in) mm (in)





3 phase 50Hz, 400V

19 21

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANB52FRNMT

4.7

4.7

Inverter

HP switch

Comp. surface thermo

HP sensor

—

Plate fin coil

Propeller fan o 2

0.200 + 0.200

140 (4,940)

Reverse cycle

58

62

60

62

1,050 (41-5/16)

330 + 40 (13+1-9/16)

1,338 (52-11/16)

136 (299.88)

R410A

7.1 (15.7) 7.7 (17.0)

2.30 (FVC68D)

9.52 (3/8)

25.4 (1)

12.7 (1/2)

25.4 (1)

Flared

Flared & Brazing

Maximum 30 m

2 to 80 m

OCH583A 7

5 DATA

5-1. ADJUSTING THE AMOUNT OF REFRIGERANT

Service Ref.

Permitted pipe length

Initial charge

(kg)

Amount of additional refrigerant charge (kg)

30 m and less 31–40 m and less 41–50 m and less 51–60 m and less 61–70 m and less 71–80 m and less

PUHZ-SW160YKA.UK

PUHZ-SW160YKA-BS.UK

PUHZ-SW160YKAR1.UK

PUHZ-SW160YKAR1-BS.UK 80 m or less

PUHZ-SW200YKA-BS.UK

PUHZ-SW200YKAR1.UK

PUHZ-SW200YKAR1-BS.UK

7.1

7.7

No additional charge necessary

0.9 kg

1.2 kg

1.8 kg

2.4 kg

2.7 kg

3.6 kg

3.6 kg

4.8 kg

The additional charge amount is obtained by the following formula.

Calculate the additional charge amount based on the following procedure.

If the calculation results in an amount that is smaller than the "Additional charge amount for 70 m," perform the additional charge using the amount shown in "Additional charge amount for 70 m."

Amount of additional charge [kg]

=

Main piping:

Liquid line size

[12.7 over all length [m] o 0.11 [kg/m]

+

Main piping:

Liquid line size

[9.52 overall length o 0.09 [kg/m]

[m]

+

Branch piping: Liquid line size


[m]

+

Branch piping: Liquid line size


[m]

– 3.6 (kg)

Additional charge amount for 70 m

SW160 3.6 kg

SW200 4.8 kg

5-2. COMPRESSOR TECHNICAL DATA

(at 20°C)

Service Ref.

PUHZ-SW160/200YKA.UK

PUHZ-SW160/200YKA-BS.UK

PUHZ-SW160/200YKAR1.UK

PUHZ-SW160/200YKAR1-BS.UK

Compressor model ANB52FRNMT

Winding

Resistance

( " )

U-V

U-W

W-V

0.30

0.30

0.30

OCH583A 8

5-3. NOISE CRITERION CURVES

MICROPHONE

1m

1.5 m

UNIT

GROUND





90

MODE

COOLING

HEATING

SPL(dB)

58

62

LINE

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250

NC-20

500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz





90

MODE

COOLING

HEATING

SPL(dB)

60

62

LINE

80

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250

NC-20

500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

OCH583A 9

5-4. <REFERENCE DATA> PLATE HEAT EXCHANGER (ACH70-74 PLATES)





Nominal water flow

Heating

(A7/W35)

Capacity

COP

Heating

(A7/W45)

Heating

(A2/W35)

Power input

Capacity

COP

Power input

Capacity

COP

L/min kW kW kW kW kW

63.1

22.0

4.20

5.238

22.0

3.20

6.875

16.0

3.11


Heating

(A7/W35)

Capacity

COP

Heating

(A7/W45)

Power input

Capacity

COP

Power input

Heating

(A2/W35)

Capacity

COP

Heating

(A2/W45)

Power input

Capacity

COP kW kW

5.144

16.0

2.36

Heating

(A2/W45)

Power input

Capacity

COP

Power input


Cooling

(A35/W7)

Capacity

EER

Power input

Cooling

(A35/W18)

Capacity

EER kW

L/min kW kW kW

6.779

45.9

16.0

2.76

5.800

18.0

4.56

Power input


Cooling

(A35/W7)

Cooling

(A35/W18)

Capacity

EER

Power input

Capacity

EER

Power input kW 3.950

Power input

Note: "COP" and "Power input" in the above table do NOT contain the "pump input (based on EN 14511)".

L/min kW kW kW kW kW kW kW kW

L/min kW kW kW kW

Rating conditions

Nominal operating condition

Heating (A7/W35)

Outside air temperature (Dry-bulb)

Outside air temperature (Wet-bulb)

Water temperature (inlet/outlet)













Cooling (A35/W7)




Cooling (A35/W18)




OCH583A

+ 7°C

+ 6°C

+ 30°C/+ 35°C

+ 7°C

+ 6°C

+ 40°C/+ 45°C

+ 2°C

+ 1°C

+ 30°C/+ 35°C

+ 2°C

+ 1°C

+ 40°C/+ 45°C

+ 35°C

+ 24°C

+ 12°C/+ 7°C

+ 35°C

+ 24°C

+ 23°C/+ 18°C

10

20.0

2.80

7.142

20.0

2.20

9.090

57.3

20.0

71.7

25.0

4.00

6.250

25.0

3.10

8.064

2.25

8.888

22.0

4.10

5.365

6 OUTLINES AND DIMENSIONS

PUHZ-SW160YKA.UK PUHZ-SW200YKA.UK

PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA-BS.UK

PUHZ-SW160YKAR1.UK PUHZ-SW200YKAR1.UK

PUHZ-SW160YKAR1-BS.UK PUHZ-SW200YKAR1-BS.UK

Unit: mm

OCH583A

PUHZ-SW160YKA.UK PUHZ-SW160YKA-BS.UK PUHZ-SW200YKA.UK PUHZ-SW200YKA-BS.UK

11

7 WIRING DIAGRAM





TB1

TB2

SYMBOL

MC

MF1, MF2

21S4

63H

63HS

TH3

TH6

TH7

TH8

TH32

LEV-A

ACL4

DCL

RS

FUSE1, FUSE2

NAME

Terminal Block <Power Supply>

Terminal Block <Indoor/Outdoor>

Motor for Compressor

Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch

High Pressure Sensor

Thermistor <Liquid>

Thermistor <2-Phase Pipe>

Thermistor <Ambient>

Thermistor <Heat Sink>

Thermistor <Comp. Surface>

Linear Expansion Valve

Reactor

Reactor

Rush Current Protect Resistor

Fuse <T15AL250V>

SYMBOL

CY1, CY2

P.B.

TB-U/V/W

TB-L1/L2/L3

TB-P1/P3

X52CA/B

N.F.

LI1/LI2/LI3/NI

LO1/LO2/LO3

GD1, GD2

C.B.

SW1

SW4

SW5

SW6

SW7

NAME

Capacitor

Power Circuit Board

Connection Terminal <U/V/W-Phase>

Connection Terminal <L1/L2/L3-Power Supply>

Connection Terminal

52C Relay

Noise Filter Circuit Board

Connection Terminal <L1/L2/L3/N-Power Supply>

Connection Terminal <L1/L2/L3-Power Supply>

Connection Terminal <Ground>

Controller Circuit Board

Switch <Manual Defrost, Defect History,

Record Reset, Refrigerant Address>

Switch <Test Operation>

Switch <Function Switch, Model Select>

Switch <Model Select>

Switch <Function Switch>

SYMBOL

SW8

SW9

SWP

CN31

CN3S

CNDM

CN51

SV1

SS

CNM

LED1, LED2

F3, F4

X51, X52, X54

NAME



Switch <Pump Down>

Connector <Emergency Operation>

Connector <Connection for Option>






LED <Operation Inspection Indicators>

Fuse <T6.3AL250V>

Relay

MF1

3~

1

C. B.

TH32 TH7 TH6 t° t° t°

TH3 t°

63H

63HS

LEV-A

M

* 1

MF2

MS

7 1

TH7/6

4 1 2 1

LEV-A

5

* 1

1

1 14

7

1 3

CN31

1

2 TRANS 1 2

1 7 1 3

2

1 3

7

F3

1 5

3 1

1 2

3 4

F4

P.B.

TH8 t°

1

21S4

2

3 1

7

3

2

1 3

(WHT)

*1. MODEL SELECT

The black square (■) indicates a switch position.

MODEL SW6 SW5-6 *2

160Y

ON

OFF

1 2 3 4 5 6 7 8

ON

OFF

1 2 3 4 5 6

1

200Y

1 2 3 4 5 6 7 8

*2. SW5-1 to 5: Function switch

1 2 3 4 5 6

BLK L3OUT

X52CB

WHT

TB-L3 BLK

RED

RED

X52CA TB-L1

RED

RS

CY1 CY2

TB-V TB-W

TB2

S1

INDOOR

UNIT

S2

S3

U

RED WHT BLK

V W

3~

MC

DCL

2

1 3 TB1

L 1

RED

L 2

WHT

L 3

BLK

N

BLU

LI1

LI2

LI3

NI

1 3

LO1 RED

LO2 WHT

LO3

BLK

OCH583A

N.F.

GD1 GD2

1 3 3 1

2

12

WHT WHT

ACL4

8 WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model

Outdoor unit power supply

Outdoor unit input capacity main switch (Breaker) *1

Outdoor unit power supply

Indoor unit-Outdoor unit *2

SW160/200

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

32 A

5 × Min. 4

Cable length 50m: 3×4 (Polar)/

Cable length 80m: 3×6 (Polar)

1 × Min. 2.5

2 × 0.3 (Non-polar)

Wire No. × size (mm²)

Indoor unit-Outdoor unit earth

Remote controller-Indoor unit

*2

*3

Outdoor unit L-N (single)

Outdoor unit L1-N, L2-N, L3-N (3 phase) *4

Indoor unit-Outdoor unit S1-S2 *4

Indoor unit-Outdoor unit S2-S3

Remote controller-Indoor unit

*4

*4

230 V AC

230 V AC

24 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. Maximum 80 m. Total maximum including all indoor/indoor connection is 80 m.

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

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

*4. The figures are NOT always against the ground.

S3 terminal has 24 V DC 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.

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

2. Power supply cables and the cables between indoor and outdoor unit shall not be lighter than polychloroprene sheathed flexible cables. (Design

60245 IEC 57)

3. Be sure to connect the cables between indoor and outdoor unit directly to the units (no intermediate connections are allowed).

Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may cause insufficient insulation to ground or a poor electrical contact .

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

4. Install an earth longer than other cables.

Power supply

Isolator 3 poles isolator

S1

A-Control

Outdoor Unit

S2

S3

S1

S2 Indoor Unit

S3

Warning:

In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between

power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals

when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.

OCH583A 13

8-2. INDOOR – OUTDOOR CONNECTING CABLE

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

Wire No. o Size (mm²)

Outdoor power supply

Max. 45 m Max. 50 m

Indoor unit-Outdoor unit 3 o 1.5 (polar) 3 o 2.5 (polar)

Max. 80 m

3 o 2.5 (polar) and S3 separated

Indoor unit-Outdoor unit earth 1 o Min. 1.5

1 o Min. 2.5

1 o Min. 2.5

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

Indoor/Outdoor separate power supply

Indoor unit-Outdoor unit

Wire No. o Size (mm²)

Max. 120 m

2 o Min. 0.3

Indoor unit-Outdoor unit earth

Note: The optional indoor power supply terminal kit is necessary.

—

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).

Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point.

Cross section of cable Wire size (mm 2 )

Round

2.5

Flat

2.5

Flat

Round

1.5

2.5

Number of wires

3

3

4

Polarity

Clockwise : S1-S2-S3

(Pay attention to stripe of yellow and green.)

Not applicable

(since center wire has no cover ﬁnish.)

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

4

Clockwise : S1-S2-S3-Open

(Connect S1 and S3 to the opposite angle.)

Note: Power supply cords of appliances shall not be lighter than design 60245 IEC or

227 IEC.

*1 In case that cable with stripe of yellow and green is available.

*2 In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm 2 .

*3 In case of regular polarity connection (S1-S2-S3).

*4 In the ﬂat cables are connected as this picture, they can be used up to 30 m.

*5 Mentioned cable length is just a reference value.

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

materials, etc.

S1 S2 S3

(3C Flat cable × 2)

L(m)*5

(30)

*1

Not applicable

*4

(18)

*2

(30)

*3

OCH583A 14

9 REFRIGERANT SYSTEM DIAGRAM

9-1. REFRIGERANT SYSTEM DIAGRAM





Unit: mm (in)

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant GAS pipe connection [25.4([1 inch)

<Brazing>

Ball valve

Strainer

#50

Charge plug

(High pressure)

High pressure sensor 63HS

Thermistor TH6

(2-phase pipe)

4-way valve

Charge plug

(Low pressure)

High pressure switch 63H

Muffler

Accumulator

Strainer

#100

Thermistor TH3

(Liquid)

Thermistor TH7

(Ambient)

Distributor

Oil return hole with strainer #40

Thermistor TH8

(Heat sink)

Compressor

Refrigerant LIQUID pipe

SW160 : connection [9.52([3/8 inch)

SW200 : connection [12.7([1/2 inch)

Stop valve

(with service port)

Strainer

#100

Linear expansion valve A

LEV-A

Strainer

#100

HEX

Stop valve

OCH583A 15

9-2. 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 “CEN-

TRALLY 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 ball 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 ball 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 ball 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 (ball 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.

Note: This section is applicable only for PAC-IF061/062B-E/PAC-SIF051B-E or later models.

OCH583A 16

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

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

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.

Unit conditions at service Check code Actions to be taken for service (summary)

Judge what is wrong and take a corrective action according to “10-2. SELF-DIAGNOSIS ACTION TABLE”.

The trouble is reoccurring.

Displayed

Not displayed

Logged

Conduct trouble shooting and ascertain the cause of the trouble according to “10-3. TROUBLESHOOTING OF

PROBLEMS”.

1 Consider the temporary defects such as the work of

protection devices in the refrigerant circuit including

compressor, poor connection of wiring, noise, etc.

Re-check the symptom, and check the installation

environment, refrigerant amount, weather when the

trouble occurred, matters related to wiring, etc.

2 Reset check code logs and restart the unit after finishing

service.

3 There is no abnormality in electrical component,

controller board, remote controller, etc.

The trouble is not reoccurring.

Not logged

1

Re-check the abnormal symptom.

2

Conduct trouble shooting and ascertain the cause of the

trouble according to “10-3. TROUBLESHOOTING OF

PROBLEMS”.

3

Continue to operate unit for the time being if the cause

is not ascertained.

4

There is no abnormality concerning of parts such as

electrical component, controller board, remote controller,

etc.

OCH583A 17

10-2. SELF-DIAGNOSIS ACTION TABLE

<Abnormalities detected when the power is put on>

Check Code Abnormal points and detection method

Note: Refer to indoor unit section for codes starting with P and E.

Case

1

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

a) Power supply breaker is turned off.

b) Contact failure or disconnection of power supply terminal c) Open phase (L2 or N phase)

Judgment and action

1

Check following items.

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

(TB1) c) Connection of power supply terminal block

(TB1)

None —

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)

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.

Check connection of the connector CNDC

on the noise filter circuit board. Refer to "10-

6. TEST POINT DIAGRAM".

4

Disconnection of reactor (ACL4)

5

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

4

Check connection of reactor. (ACL4)

Refer to "8. WIRING DIAGRAM".

5

a) Check connection of outdoor noise filter circuit board.

b) Replace outdoor noise filter circuit board.

Refer to "10-6. TEST POINT DIAGRAM".

6

Defective outdoor power circuit board

6

Replace outdoor power circuit board.

7

Open of rush current protect resistor (RS)

7 Replace rush current protect resistor (RS)

Power circuit board might be short-circuit.

Check the power circuit board. (Refer to "10-

6. TEST POINT DIAGRAM".)

8

Defective outdoor controller circuit board

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

F5

(5201)

63H connector open

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

63H: High-pressure switch

1

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

2 Disconnection or contact failure of 63H

3

63H is working due to defective parts.

4


1

Check connection of 63H connector on outdoor controller circuit board.


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.

OCH583A 18

Check Code

EA

(6844)

Abnormal points and detection method

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, etc. after power is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit board recognizes excessive number of indoor units.

Case

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 Defective transmitting receiving circuit of outdoor controller circuit board

5 Defective transmitting receiving circuit of indoor controller board

6 Defective indoor power board

7

2 or more outdoor units have refrigerant address “0” .

(In case of group control)

8

Noise has entered into power supply or indoor / outdoor unit connecting wire.


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

2

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

Total wiring length: 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.

Eb

(6845)

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

Outdoor controller circuit board can automatically set the unit number of indoor units.

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

7

Check if refrigerant addresses (SW1-3 to

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

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



8 Noise has entered into power supply or indoor/outdoor unit connecting wire.

8

Check transmission path, and remove the cause.

Note: The descriptions above 1–8, are for EA,

Eb and EC.

EC

(6846)

Startup time over

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

1

Contact failure of indoor/ outdoor unit connecting wire

2 Diameter or length of indoor/ outdoor unit connecting wire is out of specified capacity.

7



8

Noise has entered into power supply or indoor/outdoor unit connecting wire.

OCH583A 19

<Abnormalities detected while unit is operating>


High pressure (High-pressure switch

63H operated)

Abnormal if high-pressure switch 63H

(4.15MPa) operated during compressor operation.

U1

(1302)

Case

1 Decreased water flow

2

Clogged filter of water pipe

3 Locked water pump

4

Malfunction of water pump

5 Dirt of indoor heat exchanger

6

Defective operation of stop valve (Not full open)

7

Clogged or broken pipe

8 Locked outdoor fan motor

9

Malfunction of outdoor fan motor

0

Short cycle of outdoor unit

1

Dirt of outdoor heat exchanger

2

Decreased airflow caused by defective inspection of outside temperature thermistor

(It detects lower temperature than actual temperature.)

3

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

4

Disconnection or contact failure of 63H connection

5

Defective outdoor controller board

6

Defective action of linear expansion valve

7

Malfunction of fan driving circuit

1


−5 Check water circuit and repair defect.

6

Check if stop valve is fully open.

7

Check piping and repair defect.

8 −1 Check outdoor unit and repair defect.

2

Check the detected temperature of outside temperature thermistor on LED display.

(SW2 on A-Control Service Tool : Refer to "10-7. FUNCTION OF SWITCHES,

CONNECTORS AND JUMPERS".)

3

−5 Turn the power off and check if F5 is displayed when the power is turned on again.

When F5 is displayed, refer to “Judgment and action” for F5.

6 Check linear expansion valve.

7 Replace outdoor controller board.

U2

(TH32:1132)

High comp. surface temperature

(1) Abnormal if comp. surface thermistor (TH32) exceeds 125°C or 115°C continuously for

5 minutes.

Abnormal if comp. surface thermistor (TH32) exceeds 110°C or more continuously for

30 seconds after 90 seconds have passed since the defrosting operation started.

(2) Abnormal if discharge superheat

(Cooling: TH32−T

63HS

Heating: TH32−T

63HS

) increases.

All the conditions in A or B are detected simultaneously for 10 minutes continuously after 6 minutes past from compressor startup (including the thermostat indication or recovery from defrosting).

<Condition A>

• Heating mode

• When discharge superheat is less than

70°C.

• When the TH6 temp is more than the value obtained by TH7−5:.

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

<Condition B>

• During compressor operation (Cooling and Heating)


80°C in Cooling.


90°C in Heating.

• When condensing temp of TH6 is more than −40:. (In Cooling only.)

1

Overheated compressor operation caused by shortage of refrigerant

2 Defective operation of stop valve

3 Defective thermistor

4


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 “Judgment and action” for U3.

5

Check linear expansion valve.

Refer to "10-4. HOW TO CHECK THE

PARTS".

U3

(TH32:5132)

Open/short circuit of comp. surface thermistor (TH32)

Abnormal if open (−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 and for 10 minutes after and during defrosting.)

OCH583A

1

Disconnection or contact failure of connector (TH32) on the outdoor controller circuit board

2 Defective thermistor

3 Defective outdoor controller circuit board

1

Check connection of connector (TH32) on the outdoor controller circuit board. Check breaking of the lead wire for thermistor TH32). Refer to

"10-6. TEST POINT DIAGRAM".

2

Check resistance value of thermistor (TH32) or temperature by microprocessor.(Thermistor/

TH32: Refer to "10-4. HOW TO CHECK THE

PARTS".)(SW2 on A-Control Service Tool:

Refer to "10-7. FUNCTION OF SWITCHES,



20

Check Code

U4

(TH3:5105)

(TH6:5107)

(TH7:5106)

(TH8:5110)

Abnormal points and detection method Case

Open/short of outdoor unit thermistors

(TH3, TH6, TH7, and TH8)

Abnormal if open or short is detected during compressor operation.

Open detection of thermistors TH3 and TH6 is inoperative for 10 seconds to 10 minutes after compressor starting and 10 minutes after and during defrosting.

Note: Check which unit has abnormality in its thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to "10-7. FUNCTION OF SWITCHES,


(

1

Disconnection or contact failure of connectors

Outdoor controller circuit

board: TH3, TH6/TH7

Outdoor power circuit board:

CN3

2

Defective thermistor

3


)


1 Check connection of connector (TH3,TH6/TH7) on the outdoor controller circuit board. Check connection of connector (CN3) on the outdoor power circuit board. Check breaking of the lead wire for thermistor (TH3,TH6,TH7,TH8). Refer to

"10-6. TEST POINT DIAGRAM"

2 Check resistance value of thermistor

(TH3,TH6,TH7,TH8) or check temperature by microprocessor. (Thermistor/TH3,TH6,TH7,TH8:

Refer to "10-4. HOW TO CHECK THE PARTS".)

(SW2 on A-Control Service Tool: Refer to "10-7.

FUNCTION OF SWITCHES, CONNECTORS AND

JUMPERS.)

3


Symbol

TH3

TH6

TH7

TH8

Thermistors

Name

Thermistor <Liquid>

Thermistor <2-phase pipe>

Thermistor <Ambient>

Thermistor <Heat sink>

Open detection

−40: or below

−40: or below

−40: or below

−27: or below

Short detection

90: or above

90: or above

90: or above

102: or above

U5

(4230)

U6

(4250)

U8

(4400)

Temperature of heat sink

Abnormal if heat sink thermistor (TH8) detects 90:.

1

2

3

4

5

6

7

The outdoor fan motor is locked.

Failure of outdoor fan motor

Air flow path is clogged.

Rise of ambient temperature

Defective thermistor

Defective input circuit of outdoor power circuit board

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 "10-4. HOW TO CHECK THE PARTS".)

(SW2 on A-Control Service Tool: Refer to "10-7.

FUNCTION OF SWITCHES, CONNECTORS AND

JUMPERS".)

6


7


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 "10-6. TEST POINT

DIAGRAM". (Outdoor power circuit board).

4

Check compressor referring to "10-4. HOW

TO CHECK THE PARTS".

5


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

3

Check the voltage of the outdoor circuit controller board during operation.

Replace the outdoor circuit controller board.

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

OCH583A 21

Check Code Abnormal point and detection method Case

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

Refer to "10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".

U9

(4220)

01

02

04

08

10

20


Overvoltage error

• Increase in DC bus voltage to

760 V

1

2

Abnormal increase in power source voltage

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 "10-6. TEST

POINT DIAGRAM" (Outdoor power

3

4 circuit board).


Check compressor for electrical insulation. Replace compressor.

Undervoltage error

• Instantaneous decrease in DC bus voltage to 400 V

1 Decrease in power source voltage, instantaneous stop.

2

Defective 52C drive circuit in outdoor

power circuit board

1 Check the field facility for the power supply.

2


3

Disconnection or loose connection of rush current protect resistor RS

3

Check RS wiring.

Input current sensor error/

L1-phase open error

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

1

L1-phase open

2

3

Disconnection or loose connection between TB1 and outdoor noise filter circuit board

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

4

Defective ACCT (AC current trans) on the outdoor noise filter circuit board

5

Defective input current detection circuit in outdoor power circuit board

6


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

PFC error (Overvoltage/

Undervoltage/Overcurrent)

• PFC detected any of the following: a) Increase of DC bus voltage to 420 V.

b) Decrease in PFC control voltage to 12 V DC or lower.

c) Increase in input current to 50 A peak. (For models equipped with single-phase

PFC only)

PFC/IGBT error

(Undervoltage)

• When Compressor is running, DC bus voltage stays at

310V or lower for consecutive 10 seconds. (For models equipped with single-phase

PAM converter only)

4

Defective rush current protect resistor RS

Not applicable for SW160/200Y model.

Not applicable for SW160/200Y model.

4

Replace RS.

1


2

Check the wiring between TB1 and outdoor noise filter circuit board.

3

Check CN5/CNCT wiring.

4

Replace outdoor noise filter circuit board.

5


6


1


2 Check earth wiring.

3 Check CN2 wiring.

4 Replace outdoor controller circuit board.

5 Replace outdoor power circuit board.

Check the switch setting for Model Select on the outdoor controller circuit board.

Check the switch setting for Model Select on the outdoor controller circuit board.

OCH583A 22

Check Code Abnormal point and detection method

Over heat protection

Abnormal if thermistor <liquid> (TH3) detects 70: or more during compressor operation.

Ud

(1504)

Case

1

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

2

Defective thermistor <liquid>

(TH3)

3


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.

UE

UF

(4100)

UH

(5300)

UL

(1300)

Abnormal pressure of pressure sensor

(63HS)

Abnormal if pressure sensor (63HS) detects 0.1 MPa or less.

Detection is inoperative for 3 minutes after compressor starting and 3 minutes after and during defrosting.

1

2

3

Disconnection or contact failure of connector (63HS) on the outdoor controller circuit board

Defective pressure sensor


1 Check connection of connector (63HS) on the outdoor controller circuit board.

Check breaking of the lead wire for thermistor

(63HS).

2

Check pressure by microprocessor.

(Pressure sensor/ 63HS)

(SW2: Refer to "10-7. FUNCTION OF

SWITCHES, CONNECTORS AND JUMPERS". )


Compressor overcurrent interruption

(When compressor locked)

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

Current sensor error or input current error

• Abnormal if current sensor detects −1.0A to 1.0A during compressor operation.

(This error is ignored in case of test run mode.)

1

2

3

4

5

6

Stop valve is closed.



Defective compressor

Defective outdoor power board

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 "10-6. TEST POINT

DIAGRAM" (Outdoor power circuit board).

4

Check compressor.

Refer to "10-4. HOW TO CHECK THE PARTS".

5


6 Check the dip switch setting of outdoor controller circuit board. Refer to "Model Select" in

"1) Function of switches" in "10-7. FUNCTION

OF SWITCHES, CONNECTORS AND

JUMPERS".

1 Disconnection of compressor wiring

2 Defective circuit of current sensor on outdoor power circuit board

3


4

Leakage or shortage of refrigerant

1 Correct the wiring (U

•

V

•


DIAGRAM" (Outdoor power circuit board).

2


3 Check the facility of power supply.

4


Low pressure

Abnormal if the following conditions are detected for continuously 3 minutes after compressor starts heating operating for 10 minutes.

1. Heating mode

• Detection mode 1

TH7−TH3 [ 4°C and

T

63HS

−Indoor room temperature [ 2°C

• Detection mode 2

TH7−TH3 [ 2°C,

T

63HS

−Indoor room temperature [ 4°C and

TH2−Indoor room temperature [ 4°C

1

Stop valve of outdoor unit is closed during operation.

2 Leakage or shortage of refrigerant

3

Malfunction of linear expansion

4 valve

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.

3

Check linear expansion valve.

Refer to "10-4. HOW TO CHECK THE

PARTS".

4

After recovering refrigerant, remove water from entire refrigerant circuit under vacuum more than 1 hour.

2. Cooling mode



Indoor room temperature−Indoor liquid pipe temperature (TH2) [ 5°C

2 Check intake superheat.


Check additional refrigerant.

Thermistor TH3: Outdoor liquid pipe temperature

TH6: Outdoor 2-phase pipe temperature

TH7: Ambient temperature

T

63 HS

: Condensing temperature

OCH583A 23


Compressor overcurrent interruption

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

UP

(4210)

Case Judgment and action

1

Stop valve of outdoor unit is closed.

2


3


4 Defective fan of outdoor units

5

Short cycle of 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

•


DIAGRAM". (Outdoor power circuit board).

4

Check outdoor fan.

5 Solve short cycle.

6


7

Check compressor. Refer to "10-4. 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

controller circuit board

E0 or

E4

Remote controller transmission error

(E0)/signal receiving error (E4)

1

Abnormal if main or sub remote controller 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 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 receiving circuit of indoor controller board of refrigerant address “0”

6 Noise has entered into the transmission wire of remote controller.

1 Check disconnection or looseness of indoor unit or transmission wire of remote controller.

2

Set one of the remote controllers “main” if there is no problem with the action above.

3

Check wiring of remote controller.

Refer to the indoor unit's Installation Manual for remote controller connection.

If the cause of trouble is not any of 1–3 above,

4

Diagnose remote controllers.

a) When “RC OK” is displayed, remote controllers have no problem. Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

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

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

E1 or

E2

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.

OCH583A 24

Check Code

E3 or

E5


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)

3

Abnormal if indoor controller board could not find blank of transmission path.

(Check code: E5)

4

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)

Case

1

2 remote controllers are set as

“main.”

(In case of 2 remote controllers)

Refer to the indoor unit's

Installation Manual for remote controller connection.

2

Repetition of refrigerant address

3

Defective transmitting receiving circuit of remote controller

4


5

Noise has entered into transmission wire of remote controller.


1

Set a remote controller to main, and the other to sub.

2

The address changes to a separate setting.

3

−5 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.

E6

(6840)

E7

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.

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

Defective rush current resistor of outdoor power circuit board

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

SK52ST))

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.

Note: Other indoor controller board may have defect in the 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 Check the rush current resistor on outdoor power circuit board with tester. If open is detected, replace the power circuit board.

Indoor/outdoor unit communication error (Transmitting error)

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

1


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.

E8

(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.

OCH583A 25

Check Code

E9

(6841)

EF

(6607 or

6608)


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

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

2

Abnormal if outdoor controller circuit board could not find blank of transmission path for 3 minutes.

Non defined check code

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

Case

1

Indoor/ outdoor unit connecting wire has contact failure.

2

Defective communication circuit of outdoor controller circuit board

3

Noise has entered power supply.

4

Noise has entered indoor/ outdoor unit connecting wire.


1

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

2

–4 Turn the power off, and on again to check. Replace outdoor controller circuit board if abnormality is displayed again.

1

2

Noise has entered transmission wire of remote controller.

Noise has entered indoor/ outdoor 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.

Ed

(0403)

PL

Serial communication error

1

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

Abnormal refrigerant circuit

During Cooling operation, the following conditions are regarded as failures when detected for 1 second.

a) The compressor continues to run for 30

or more seconds.

b) The liquid pipe temperature or the

condenser/evaporator temperature is

75°C or more.

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

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


4


1

2

3

4

Abnormal operation of 4-way valve

Disconnection of or leakage in refrigerant pipes

Air into refrigerant piping

Defective refrigerant circuit

(clogging)

1

When this error occurs, be sure to replace the 4-way valve.

2

Check refrigerant pipes for disconnection or leakage.

3

After the recovery of refrigerant, vacuum dry the whole refrigerant circuit.

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.

OCH583A 26

10-3. TROUBLESHOOTING OF PROBLEMS work.

Phenomena

1. Remote controller display does not

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

2

1

Factor

12 V DC is not supplied to remote controller.

(Power supply display is not indicated on LCD.)

12–15 V DC is supplied to remote controller, however, no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

1

At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2

Communication error between the remote controller and indoor unit

3

Communication error between the indoor and outdoor unit

4

Outdoor unit protection device connector is open.

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

Countermeasure

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.

2

Refer to phenomena No.3 below.

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

”PLEASE WAIT” is displayed for 6 minutes at most in case of indoor/outdoor unit communication error. Check LED3 on indoor controller board.

(1) When LED3 is not blinking.

Check indoor/outdoor connecting wire for Miswiring.

(Converse wiring of S1 and S2, or break of S3 wiring.)

(2) When LED3 is blinking.

Indoor/outdoor connecting wire is normal.

Check LED display on outdoor controller circuit board. Refer to "10-7. FUNCTION

OF SWITCHES, CONNECTORS AND

JUMPERS".

Check protection device connector (63H) for contact failure.


1

Normal operation

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

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

1

Refrigerant shortage

1

2

3

4

Linear expansion valve fault

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

Refrigerant shortage

Lack of insulation for refrigerant piping

Bypass circuit of outdoor unit fault

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.

1

• Discharging temperature and indoor heat exchanger temperature does not rise.

Inspect the failure by checking discharging pressure.

• Replace linear expansion valve.

2

• If refrigerant leaks, discharging temperature rises and LEV opening increases. Inspect leakage by checking the temperature and opening.

• Check pipe connections for gas leakage.

3

Check the insulation.

4 Check refrigerant system during operation.

6. 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

OCH583A 27

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

Diagnosis flow Cause

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

6 minutes or more How long is “PLEASE WAIT” kept being displayed on the remote controller?

2 to 6 minutes

2 minutes or less

Check the LED display of the outdoor controller circuit board.

Are any check codes displayed on the remote controller?

YES

NO

Are any check codes displayed on the LED?

YES

NO

• “PLEASE WAIT”

will be displayed

during the start-up

diagnosis after turning

on the main power.

• Normal

The 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.


controller board

• Defective remote

controller

OCH583A 28

Symptoms: Nothing is displayed on the remote controller. 1

LED display of the indoor controller board

LED1 :

LED2 :

LED3 :

Diagnosis flow

Check the voltage between S1

and S2 on the terminal block

(TB1) of the indoor unit which

is used to connect the indoor

unit and the outdoor unit.

198 to 264 V AC?

Cause

NO

Check the voltage among L(L

3

) and

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

198 to 264 V AC?

NO

YES

Check the voltage between S1 and S2 on the terminal block

(TB1) of the outdoor unit which is used to connect the indoor unit and the outdoor unit.

• Troubles concerning

power supply.

• Check the power wiring

to the outdoor unit.

• Check the breaker.

198 to 264 V AC?

YES

NO

• Bad wiring of the

outdoor controller

board.

• The fuses on the

outdoor controller

circuit board are

blown.

• Check the wiring of the

outdoor unit.

• Check if the wiring is bad.

Check if the fuses are blown.

The fuses on the outdoor

controller circuit board will

be blown when the indoor

/outdoor connecting wire

short-circuits.

• Bad wiring of the

outdoor controller

board.

• The fuses on the

outdoor controller

circuit board are

blown.

• 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.

OCH583A 29



LED1 :

LED2 :

LED3 : or

Diagnosis flow

Is the refrigerant address “0”?

NO

YES

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

Cause

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

NO

198 to 264 V AC?

YES

Not lighting.

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

Blinking.

NO

YES

• Breaking or poor contact

of the indoor/outdoor

connecting wire

• Fix the breaking or poor

contact of the indoor/outdoor

connecting wire.

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

• Normal.

Only the unit which

has the refrigerant

address “0” supplies

power to the remote

controller.

• Set the refrigerant

address to “0”. In case of

the multiple grouping

system, recheck the

refrigerant address again.

Is anything displayed?

Not displayed.

Displayed.

Is “EA” or “Eb” displayed?

YES

NO


controller circuit

board

Is “E8” displayed?

NO

Can the unit be restarted?

YES


controller circuit

board

• Replace the outdoor

controller circuit board.


controller circuit board.

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

17 to 28 V DC?

YES

NO

OCH583A

Can all the indoor unit be operated?

YES

30

NO


controller board

• Influence of

electromagnetic noise


power circuit board


power board

• Replace the indoor controller

board of the indoor unit which

does not operate.

• Not abnormal.

There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.


power circuit board.

• Replace the indoor

power board.



LED1 :

LED2 : or

LED3 : —

Diagnosis flow Cause

Check the voltage of the terminal block of the indoor controller.

10 to 16 V DC?

NO

YES

Check the status of the LED2.

Blinking

Lighting

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

Check the status of the LED2.

Blinking

Lighting

• 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 connecting

the remote controller wire.

If it is not between 10 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.


controller board

• Replace the indoor

controller board.

OCH583A 31

• Before repair

Frequent calling from customers

Unit does not operate at all.

Phone Calls From Customers

1

The operating display of remote

controller does not come on.

2

Unit cannot be restarted for a

while after it’s stopped.

How To Respond

1

Check if power is supplied to air conditioner.

Nothing appears on the display unless power is

supplied.

2

Wait around 3 minutes to restart unit.

The air conditioner is in a state of being protected

by the microcomputer’s directive. Once the

compressor is stopped, the unit cannot be

restarted for 3 minutes. This control is also applied

when the unit is turned on and off by remote

controller.

3

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

3

Check code will be displayed if any protection

devices of the air conditioner are actuated.

What is check code?

Note

Refer to “SELF-DIAGNOSIS

ACTION TABLE”.

Check if servicing is

required for the error.

Remote controller

1

“PLEASE WAIT” is displayed

on the screen.

1

Wait around 2 minutes.

An automatic startup test will be conducted for

2 minutes when power is supplied to the air

conditioner. “PLEASE WAIT” will be kept displayed

during that time.

2

“STANDBY” is displayed on the

screen.

2

This is displayed when the unit starts HEAT

operation, when the thermostat puts the

compressor in operation mode, or when the

outdoor unit ends DEFROST operation and

returns to HEAT operation.

The display will automatically disappear around

10 minutes later.

While “STANDBY” is displayed on the remote

controller, the airflow amount will be restricted

because the indoor unit’s heat exchanger is not

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

vane will be automatically set to horizontal blow

in order to prevent cold air from directly blowing

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

to the setting specified by the remote controller

when “STANDBY” is released.

3

“DEFROST” is displayed on 3

The outdoor unit gets frosted when the outside

the screen. (No air comes out of temperature is low and the humidity is high.

the unit.) “DEFROST” indicates the DEFROST

operation is being performed to melt this frost. The

DEFROST operation ends in around 10 minutes

(at most 15 minutes).

During the DEFROST operation, the indoor unit’s

heat exchanger becomes cold, so the fan is

stopped. The up/down vane will be automatically

set to horizontal blow in order to prevent cold air

from directly blowing out to human body. The

display will turn into “STANDBY” when DEFROST

operation ends.

OCH583A 32

Phone Calls From Customers

The room cannot be cooled or heated sufficiently.

How To Respond

1

Check the set temperature of remote controller.

The outdoor unit cannot be operated if the set

temperature is not appropriate.

The outdoor unit operates in the following modes.

COOL: When the set temperature is lower

than the room temperature.

HEAT: When the set temperature is higher

than the room temperature.

Sound comes out from the air conditioner.

1

2

A gas escaping sound is heard

sometimes.

A cracking sound is heard

sometimes.

3

A buzzing sound is heard

sometimes.

4

the outdoor unit sometimes.

5

A ticking sound is heard from

A sound, similar to water

flowing, is heard from the unit.

2

Check there is enough space around the air

conditioner.

If there are any obstacles in the air intake or air

outlet of indoor/outdoor units, they block the

airflow direction so that the unit capacity will be

lowered.

1

This is not a malfunction.

This is the sound which is heard when the flow of

refrigerant in the air conditioner is switched.

2


This is the sound which is heard when internal

parts of units expand or contract when the

temperature changes.

3


This is the sound which is heard when the outdoor

unit starts operating.

4


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.

5


This is the sound which is heard when the

refrigerant is flowing inside the indoor unit.

A white mist is expelled from the indoor unit. This is not a malfunction.

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

Water or moisture is expelled from the outdoor unit.

COOL: when pipes or piping joints are cooled, they

get sweated and water drips down.

HEAT: water drips down from the heat exchanger.

Note: Make use of optional parts “Drain Socket” and

“Drain pan” if these water needs to be collected and drained out for once.

The display of wireless remote controller gets dim or does not come on.

The indoor unit does not receive a signal from remote controller at a long distance.

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

Note

OCH583A 33

10-4. HOW TO CHECK THE PARTS





Check points

Disconnect the connector then measure the resistance with a tester.

(At the ambient temperature 10 to 30°C)

Parts name

Thermistor (TH3)

<Liquid>

Thermistor (TH6)

<2-phase pipe>

Thermistor (TH7)

<Ambient>

Thermistor (TH8)

<Heat sink>

Thermistor (TH32)

<Comp. Surface>

TH32

TH3

TH6

TH7

TH8

Normal

160 to 410 k"

4.3 to 9.6 k"

39 to 105 k"

Abnormal

Open or short

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

Solenoid valve coil

<4-way valve>

(21S4)

Measure the resistance between the terminals with a tester.

(At the ambient temperature 20°C)

Normal

1215 ± 122 "

Motor for compressor

(MC) U

Measure the resistance between the terminals with a tester.

(Winding temperature 20°C)

Normal

V

W

Refer to “5-2. COMPRESSOR TECHNICAL DATA”.

Linear expansion valve

(LEV-A)

Disconnect the connector then measure the resistance with a tester.

(Winding temperature 20°C)

M

Gray

Orange

Red

Yellow

Black

3

4

5

1

2

Gray - Black Gray - Red

Normal

Gray - Yellow

46 ± 3 "

Gray - Orange

Abnormal

Open or short

Abnormal

Open or short

Abnormal

Open or short

OCH583A 34

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

1

2

Notes

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

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

(It causes trouble of the outdoor controller circuit

Self check

Symptom : The outdoor fan cannot rotate. board and fan motor.)

Fuse check

Check the fuse (F5) on outdoor controller circuit board.

Replace the outdoor controller circuit board

(C.B) and fan motor (MF1, 2).

Did the fuse blow?

No

Wiring contact check

Contact of fan motor connector (CNF1, 2)

Yes

Is there contact failure?

Yes Recover wiring.

No

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

Measure the voltage in the outdoor controller circuit board.

TEST POINT 1 : V

DC

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

DC

TEST POINT 2 : V

CC

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

CC

250–330 V DC

15 V DC

Is the voltage normal?

No

Replace the outdoor controller circuit board.

Yes

Check the operation.

Fail

Replace the fan motor.

OK

END

Replace the fan motor.

Yes

Check the operation of fan.

Fail

Replace the outdoor controller circuit board.

OK

END

10-5. HOW TO CHECK THE COMPONENTS

<HIGH PRESSURE SENSOR>

Vout (V)

4.5

2.5

0.5

2.5

5

WHT

Vout BLU

BLK

2

1

MULTI

CONTROLLER BOARD

5 V DC

3

MICRO

PROCESSOR

GND

63HS

3

-1 : 5 V (DC)

2

-1 : Output Vout (DC)

OCH583A 35

<Thermistor feature chart>

Low temperature thermistors

• Thermistor <Liquid> (TH3)

• Thermistor <2-phase pipe> (TH6)

• Thermistor <Ambient> (TH7)

Thermistor R0 = 15 k" ± 3%

B constant = 3480 ± 2%

R t

1 1

0: 15 k"

10: 9.6 k"

20: 6.3 k"

25: 5.2 k"

30:

40:

4.3 k"

3.0 k"

Medium temperature thermistor

• Thermistor <Heat sink> (TH8)

Thermistor R50 = 17 k" ± 2%


R t

1

0: 180 k"

25: 50 k"

50: 17 k"

70:

90:

8 k"

4 k"

High temperature thermistor

• Thermistor <Comp. Surface> (TH32)

Thermistor R120 = 7.465 k" ± 2%


R t

1

20: 250 k"

30: 160 k"

40: 104 k"

50:

60:

70 k"

48 k"

70:

80:

34 k"

24 k"

90: 17.5 k"

100: 13.0 k"

110: 9.8 k"

OCH583A 36

50

40

30

20

10

0

200

150

100

50

200

100

0

400

300

500

0

25 75 100 125

25 50 75

Temperature (:)

100 120

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 circuit board.

• Valve position can be changed in proportion to the number of pulse signal.

<Connection between the outdoor controller board and the linear expansion valve>

Outdoor controller board

12 V DC

LEV

Gray 1

Drive circuit

3

[4

M 2

[4 Orange 2

[3

6

1 5

4

[3

[2

[1

Red 3

Yellow 4

Black 5

[2

[1

Connector LEV-A

<Output pulse signal and the valve operation>

Output

(Phase)

1

Output

2 3 4 5 6 7 8

[1 ON ON OFF OFF OFF OFF OFF ON

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

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

The output pulse shifts in above order.

[2 · When linear expansion valve operation stops, all output phases become OFF.

[3

OFF ON ON ON OFF OFF OFF OFF

OFF OFF OFF ON ON ON OFF OFF

[4 OFF OFF OFF OFF OFF ON ON ON

(2) Linear expansion valve operation

A

Close

Open

C

· When the switch is turned on, 700 pulse closing valve signal will be sent till it goes to

A

point in order to define the valve position.

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

When the valve moves smoothly, there is no sound or vibration occurring from the linear expansion valve : however, when the pulse number moves from

B

to

A

or when the valve is locked, 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.

500 pulse

Opening a valve all the way

B

Pulse number

Extra tightening (about 32 pulse)

OCH583A 37

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

<Composition>

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

Stopper Main body

Coil

Lead wire

<How to detach the coil>

Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.

Be sure to detach the coil holding main body firmly. Otherwise pipes can bend due to pressure.

<How to attach the coil>

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

To prevent piping stress, be sure to attach the coil holding the main body of linear expansion valve firmly. Otherwise pipe may break.

A

Be sure to attach the stopper.

A

OCH583A 38

10-6. TEST POINT DIAGRAM

Outdoor controller circuit board





<CAUTION> TEST POINT1 is high voltage.

SW1

Manual defrost, detect history record reset, refrigerant address

SW6

Model select

CNDM

1 to 2: Input of low-level sound priority mode

1

to 3: Input of external contact point

CN51

• Compressor operating signal

• Abnormal signal

SW4

Test operation

SWP

Pump down

SW5

Function switch

SW8

Wiring replace

CNM

Connect to A control service tool

CN4

Transmission to outdoor power circuit board (CN4)

21S4

4-way valve

63H

High pressure switch

TH3

<Liquid>

TH7/6

Thermistor

<Ambient/

2-phase pipe>

TH32

Thermistor

<Comp. Surface>

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: Not used

6

–5: 16 V DC

7

–5: 16 V DC

V

FG

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

(Same as

(CNF1 7 (+)4 (−))

V

SP

(Voltage between pins of

C5A, C5B):

0 V DC (when stopped),

1– 6.5 V DC (when operated)

OCH583A

CNF1, CNF2

1

–4: 250–330 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)

(0–15 V pulse)

CNDC

250–330 V DC

(1+, 3−)

Noise filter circuit board

39

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)

CNS

S1-S2: 230 V AC

+ −

Communication power supply

D71 Voltage

24 V DC

Outdoor noise filter circuit board





LI1, LI2, LI3, NI

POWER SUPPLY

LI1-LI2/LI-LI3/LI3-LI1 : 400 V AC input

LI1-NI/LI2-NI/LI3-NI : 230 V AC input

(Connect to the terminal block (TB1))

CNAC1, CNAC2

230 V AC

(Connect to the

outdoor controller

circuit board (CNAC))

GD1

Connect to the earth

GD2

Connect to the earth

CNDC

(Connect to the

outdoor controller

circuit board

(CNDC))

CNL

Connect to the ACL4

OCH583A

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))

40

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 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.

TB-P3

Connect to the DCL

TB-U, TB-V, TB-W

Connect to the compressor (MC)

Voltage among phases:

10–400 V AC

Diode module

N2

W V U P2

TB-P1

Connect to the DCL

TAB connector on X52CA

Connect to the

RS resistor

TB-L1

TB-L2

TB-L3

Connect to the outdoor noise filter circuit board

(LO1, LO2, LO3)

400 V AC

P1 L1 L2 L3 N1

CN4

Connect to the outdoor controller circuit board (CN4)

CN5

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

CN6

Thermistor

<Heat sink> (TH8)

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 : +

OCH583A 41

L3OUT-L3IN

Lead connect

DIP-IPM

10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches The black square ( ) indicates a switch position.

Type of

Switch Switch No.

Function

Action by the switch operation

ON OFF

Default setting

Effective timing

1 Manual defrost * 1

2 Abnormal history clear

Start

Clear

Normal

Normal

OFF

OFF

When compressor is working in heating operation. * 1 off or operating

3 ON ON ON ON

SW1

DIP switch

4

5

Refrigerant address setting

1 2 3

0

4 5 6

ON

1 2 3 4 5 6

1

ON

1 2 3 4 5 6

2

1 2 3 4 5 6

3

OFF

When power supply is

ON

6

1 2 3

4

4 5 6 1 2 3 4 5 6

5

SW4

1

2

No function

No function

—

—

—

—

OFF

OFF

—

—

Push switch

SWP Pump down Start Normal — Under suspension

DIP switch

SW5

1

2

No function

Power failure automatic recovery * 2

—

Auto recovery

—

No auto recovery

3,4,5 No function — —

6 Model select Following SW5-6 reference

SW7* 4

SW8

SW9

SW6

7

8

SW5 6

3,4

1

4

5

2

3

6

1

2

2

3

5

6

1

1

2

Mode select * 3

No function

Demand function

—

3 Max Hz setting (cooling) Max Hz (cooling) o 0.8

4 Max Hz setting (heating) Max Hz (heating) o 0.8

No function

Defrost setting

No function

—

For high humidity

—

No function

No function

No function

No function

No function

Model select

—

—

—

—

—

The black square (

MODEL

PUHZ-SW160YKA

PUHZ-SW200YKA

ON

OFF

ON

OFF

Low noise mode

—

Normal

Normal

—

Normal

—

■

) indicates a switch position.

SW6 SW5-6 * 5

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

ON

OFF

ON

OFF

—

—

—

—

—

1 2 3 4 5 6

1 2 3 4 5 6

OFF

OFF When power supply ON

OFF

—

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

As shown in the left table

—

—

—

Always

—

Always

Always

—

Always

—

—

—

—

—

—

—

* 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.

* 2 ‘Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON, ‘Auto recovery’ activates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW.

Please refer to the indoor unit installation manual.

* 3 SW7-1 is setting change over of Demand/Low noise. It is effective only in case of external input.

(Local wiring is necessary. Refer to the next page: Special function)

* 4 Please do not use SW7-3 to 7-6 usually. Trouble might be caused by the usage condition.

* 5 SW5-1 to 5: Function switch

OCH583A 42

Special function

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

By performing the following modification, 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

F

SW1

X

X

C

Orange

Brown

Red

D

CNDM

1

3

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 Maximum 10 m

F Power supply for relay

B E

OCH583A 43

<Display function of inspection for outdoor unit>

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

CNM on outdoor controller board.

[Display]

(1)Normal condition

Unit condition

When the power is turned on

When unit stops

When compressor is warming up

When unit operates


LED1 (Green) LED2 (Red)

Lighted

Lighted

Lighted

Lighted

Lighted

Not lighted

Not lighted

Lighted

A-Control Service Tool

Check code Indication of the display

00, etc.

08, etc.

C5, H7, etc.

Alternately blinking display

Operation mode

(2)Abnormal condition

Indication



Contents

1 blinking 2 blinking

Connector (63H) is open.

F5

2 blinking 1 blinking cting wire, excessive number of indoor units (4 units or more)

Miswiring of indoor/outdoor unit cosconnection)

—

—

2 blinking

3 blinking

4 blinking

Startup time over —

(signal receiving error) is detected by indoor unit.

E6

E7 unit.

Indoor/outdoor unit communication error outdoor unit.

Indoor/outdoor unit communication error

(transmitting error) is detected by outdoor unit.

Remote controller signal receiving error is detected by remote controller.

—

—

E0

Remote controller transmitting error is detected by remote controller.

E3

E4 Remote controller signal receiving error is detected by indoor unit.

Remote controller transmitting error is detected by indoor unit.

Check code is not defined.

E5

EF

PL

Error

Inspection method

1

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

not disconnected.

2

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

1

Check if indoor/outdoor connecting wire is connected correctly.

2

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

3

Check if noise entered into indoor/outdoor connecting

wire or power supply.

4

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

P.18

P.19

(EA)

P.19

(Eb)

P.19

(EC)

P.25

1

Check if indoor/outdoor connecting wire is connected correctly.

2

Check if noise entered into indoor/outdoor connecting wire or

power supply.

3

Check if noise entered into indoor/outdoor controller board.

4


P.25

1

Check if connecting wire of indoor unit, or remote

controller is connected correctly.

2

Check if noise entered into transmission wire of remote

controller.

3


Detailed reference page

P.25

(E8)

P.26

(E9)

P.24

P.25

P.24

P.25

1

Check if the remote controller is compatible.

2

Check if noise entered into transmission wire of remote controller.

3

Check if noise entered into indoor/outdoor connecting wire.

4


1

Be sure to replace the 4-way valve.

2

Check refrigerant pipes for disconnection or leakage.

3

After the recovery of refrigerant, vacuum dry the whole

refrigerant circuit.

4

Check refrigerant circuit for operation.

P.26

P.26

5 blinking Serial communication error controller board and outdoor power board>

Ed 1

Check if connector (CN4) on outdoor controller board and

outdoor power board is not disconnected.

P.26

*1 Check code displayed on remote controller

*2 Refer to the service manual of indoor unit.

OCH583A 44

Indication



3 blinking 1 blinking Abnormality of comp. surface thermistor(TH32)

4 blinking

2 blinking

3 blinking

4 blinking

5 blinking

6 blinking

7 blinking

Abnormality of outdoor fan motor rotational speed

Protection from overheat operation(TH3)

Compressor overcurrent breaking(Start-up locked)

Compressor overcurrent breaking

Abnormality of current sensor (P.B.)

Abnormality of power module

Open/short of comp. surface thermistor (TH32)

Open/short of outdoor thermistors

(TH3, TH6, TH7 and TH8)

Abnormality of heat sink temperature

Abnormality of voltage

U8

Ud

UF

UP

UH

U6

U3

U4

U5

U9

1 blinking Abnormality of room temperature thermistor (TH1)

Abnormality of pipe temperature thermistor /Liquid (TH2)

2 blinking

Abnormality of pipe temperature thermistor/condenser-evaporator/ or tank water temperature thermistor

Abnormality of drain sensor (DS)

Float switch(FS) connector open

3 blinking

Contents

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

Indoor drain overflow protection

Freezing (cooling)/overheating

(heating) protection

U2

U1

P1

P2

P9

P4

P5

P6

Error

Inspection method

1

2

Check if stop valves are open.

board are not disconnected.

3

Check if unit is filled with specified amount of refrigerant.

4

Measure resistance values among terminals on indoor valve and

outdoor linear expansion valve using a tester.

1

2

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

3

4

Check if heat exchanger and filter is not dirty.

using a tester.

1

2

Check the outdoor fan motor.

Detailed reference page

P.20

-

P.20

P.21

1

2

Check if stop valves are open.

compressor wiring.

3

Measure resistance values among terminals on compressor using a tester.

4

5

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

1

Check if connectors(TH3, TH6,TH7 and TH32)on outdoor controller

board and connector (CN3) on outdoor power board are not disconnected.

2

Measure resistance value of outdoor thermistors.

P.23

P.23

P.24

P.23

P.21

P.20

P.21

1

2

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

1

Check looseness, disconnection, and converse connection of

compressor wiring.

2

3

Measure resistance value among terminals on compressor using a tester.

4 Check the wiring of CN52C.

1

Check if connectors or terminal blocks on indoor controller board are not

disconnected.

2

Measure resistance value of indoor thermistors.

P.21

P.22

*2

*2

1

Check if connectors or terminal blocks on indoor controller board is not

disconnected.

2

3

Measure resistance value of indoor thermistors.

a tester.

4

Check if drain pump works.

5

Check drain function.

1

2

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

3

4

Measure resistance value on indoor and outdoor fan motors.

*2

*2

*2

*1 Check code displayed on remote controller

*2 Refer to the service manual of indoor unit.

OCH583A 45

<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 Display detail Explanation for display Unit

ON

1 2 3 4 5 6

<Digital indicator LED1 working details>

(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.

(Lighting)

LED1

ON

SW2

1 2 3 4 5 6

(Initial setting)

The tens digit : Operation mode The ones digit : Relay output

Display Operation Model

OFF / FAN

COOLING

HEATING

DEFROSTING

Display

Warming-up

Compressor

—

—

—

—

—

—

—

—

ON

ON

Compressor

ON

ON

ON

ON

—

—

—

—

4-way valve Solenoid valve

O

C

H d

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.

2

3

0

1

4

5

6

7

8

A

—

—

(3) When the display blinks

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

—

—

ON

ON

—

—

ON

ON

—

ON

—

ON

—

ON

—

ON

—

ON

—

—

Display Inspection unit

0

1

Outdoor unit

Indoor unit 1

Display

U1

U2

U3

U4

U5

U6

U8

Ud

UF

UH

UL

UP

PL

P1–P8

Contents to be inspected (During operation)

Abnormal high pressure (63H operated)

Abnormal high discharge temperature and comp. surface thermistor, shortage of refrigerant

Open/short circuit of comp. surface thermistor(TH32)

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

Abnormal temperature of heat sink

Abnormality of power module

Abnormality in outdoor fan motor

Overheat protection

Compressor overcurrent interruption (When Comp. locked)

Current sensor error

Abnormal low pressure

Compressor overcurrent interruption

Abnormality of refrigerant

Abnormality of indoor units

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

OCH583A 46

SW2 setting Display detail

Pipe temperature/Liquid (TH3)

−40 to 90

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Comp. surface temperature (TH32)

−52 to 221

The black square ( ) indicates a switch position.

Explanation for display

−40 to 90

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

and temperature are displayed by turns.)

(Example) When −10:;

0.5 s 0.5 s 2 s

− 10

Unit

:

−52 to 221

(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

1 05

:

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Output step of outdoor FAN

0 to 10

0 to 10

Step

The number of ON / OFF times of compressor

0 to 9999

Compressor integrating operation times

0 to 9999

Compressor operating current

0 to 50

0 to 9999

(When the number of times is 100 or more,

hundreds digit, tens digit and ones digit are


(Example) When 42500 times (425 ×100 times);

0.5 s 0.5 s 2 s

4 25

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

2 45

100 times

10 hours

0 to 50

(Omit the figures after the decimal fractions.)

A

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

OCH583A

Compressor operating frequency

0 to 255

LEV-A opening pulse

0 to 480

Error postponement code history (1) of outdoor unit

Operation mode on error occurring

47

0 to 255

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

digit and ones digit are displayed by turns.

(Example) When 125Hz;

0.5 s 0.5 s 2 s

1 25

0 to 480

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

digit and ones digit are displayed by turns.

(Example) When 150 pulse;

0.5 s 0.5 s 2 s

1 50

Postponement code display

Blinking: During postponement

Lighting: Cancellation of postponement

“00” is displayed in case of no postponement.

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

(SW2) ON

1 2 3 4 5 6

Hz

Pulse

Code display

Code display

SW2 setting

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Display detail

Pipe temperature/Liquid (TH3) on error occurring

−40 to 90


Explanation for display Unit

−40 to 90

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

and temperature are displayed by turns.)

(Example) When −15:;

0.5 s 0.5 s 2 s

15

:

Comp. surface temperature (TH32) on error occurring

−52 to 221

−52 to 221

(When the temperature is 100: or more, the

hundreds digit, tens digit and ones digit are


(Example) When 130:;

0.5 s 0.5 s 2 s

1 30

:

ON

1 2 3 4 5 6

Compressor operating current on error occurring

0 to 50

0 to 50

ON

1 2 3 4 5 6

Error history (1) (latest)

Alternate display of abnormal unit number and code

When no error history,

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

ON

1 2 3 4 5 6

Error history (2)

Alternate display of error unit number and code

When no error history,

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

ON

1 2 3 4 5 6

Thermostat ON time

0 to 999

Test run elapsed time

0 to 120

A

Code display

Code display

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

2 45

Minute

0 to 120

(When it is 100 minutes or more, the hundreds digit,

tens digit and ones digit are displayed by turns.)


0.5 s 0.5 s 2 s

1 05

Minute

OCH583A 48


The number of connected indoor units

ON

1 2 3 4 5 6



0 to 4

(The number of connected indoor units are displayed.)

Unit

ON

1 2 3 4 5 6

Capacity setting display Displayed as an outdoor capacity code.

SW160YKA

Capacity

SW200YKA

Code

40

50

Code display

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Outdoor unit setting information

• The tens digit (Total display for applied setting)

Setting details Display details

H·P / Cooling only

Single phase / 3 phase

0 : H·P 1 : Cooling only

0 : Single phase 2 : 3 phase

• The ones digit

Setting details Display details

Defrosting switch 0 : Normal 1 : For high humidity

(Example) When heat pump, 3 phase and defrosting

(normal) are set up, “20” is displayed.

Code display

Indoor pipe temperature/Liquid (TH2(1))

Indoor 1

−39 to 88

−39 to 88

(When the temperature is 0: or less, “–” and

temperature are displayed by turns.)

:

ON

1 2 3 4 5 6

Indoor pipe temperature/Cond./Eva.

(TH5(1))

Indoor 1

−39 to 88

−39 to 88



:

ON

1 2 3 4 5 6

Indoor pipe temperature/Liquid (TH2(2))

Indoor 2

−39 to 88

−39 to 88



ON

1 2 3 4 5 6

Indoor pipe temperature/Cond. / Eva.

(TH5(2))

Indoor 2

−39 to 88

−39 to 88



ON

1 2 3 4 5 6

Indoor room temperature (TH1)

8 to 39

8 to 39

:

:

:

OCH583A 49

SW2 setting

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Display detail

Indoor setting temperature

17 to 30

Outdoor pipe temperature/2-phase

(TH6)

−39 to 88

Outdoor Ambient temperature (TH7)

−39 to 88

Outdoor Heat sink temperature (TH8)

−40 to 200

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Discharge superheat SHd

0 to 255

Cooling = TH32−T

63HS

Heating = TH32−T

63HS

17 to 30



°C

−39 to 88



°C

−39 to 88


temperature are displayed by turns.) °C

−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.)

0 to 255

(When the temperature is 100°C or more, hundreds

digit, tens digit and ones digit are displayed by

turns.)

°C

°C

ON

1 2 3 4 5 6

Number of defrost cycles

0 to FFFE

ON

1 2 3 4 5 6

Input current of outdoor unit

U9 error detail history (latest)

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

DC bus voltage

300 to 750

0 to FFFE (in hexadecimal notation)

(When more than FF in hex (255 in decimal), the number is displayed in order of 16 3 's and 16 2 's, and

16 1 's and 16 0 's places.

(Example) When 5000 cycles;

0.5 s 0.5 s 2 s

9 C4

2 cycles

0 to 500

(When it is 100 or more, hundreds digit, tens digit

and ones digit are displayed by turns.)

0.1 A

Description

Normal

Overvoltage error

Undervoltage error

Input current sensor error

L

1

-phase open error

Abnormal power synchronous signal

Display

00

01

02

04

08

Display examples for multiple errors:

Overvoltage (01) + Undervoltage (02) = 03

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

Code display

300 to 750

(When it is 100 V or more, hundreds digit, tens


V

OCH583A 50

SW2 setting

ON

Display detail


1 2 3 4 5 6


ON

1 2 3 4 5 6

ON

1 2 3 4 5 6


Explanation for display









Unit

Code display

Code display

Error history (3) (Oldest)

Alternate display of abnormal unit number and code.

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

Code display

ON

1 2 3 4 5 6

Error thermistor display

When there is no error thermistor,

“–“ is displayed.

3: Outdoor pipe temperature /Liquid (TH3)

6: Outdoor pipe temperature /2-phase (TH6)

7: Outdoor Ambient temperature (TH7)

8: Outdoor Heat sink (TH8)

Code display

ON

1 2 3 4 5 6

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 125Hz;

0.5 s 0.5 s 2 s

1 25

0 to 10

ON

1 2 3 4 5 6

Fan step on error occurring

0 to 10

Hz

Step

ON

1 2 3 4 5 6

Indoor room temperature (TH1) on error occurring

8 to 39

8 to 39

ON

1 2 3 4 5 6

Indoor pipe temperature/Liquid (TH2) on error occurring

−39 to 88

−39 to 88

(When the temperature is 0°C or less, “–” and


(Example) When −15°C;

0.5 s 0.5 s 2 s

15

ON

1 2 3 4 5 6

Outdoor temperature/2-phase pipe (TH6) on error occurring

−39 to 88

−39 to 88




0.5 s 0.5 s 2 s

15

:

:

:

OCH583A 51

SW2 setting

ON

1 2 3 4 5 6

Display detail

Outdoor temperature/Ambient (TH7) on error occurring

−39 to 88



−39 to 88




0.5 s 0.5 s 2 s

15

:

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Outdoor temperature/Heat sink (TH8) on error occurring

−40 to 200

−40 to 200





turns.)

Discharge superheat on error occurring

SHd

0 to 255

Cooling = TH32−T

63HS

Heating = TH32−T

63HS

0 to 255



turns.)

(Example) When 150°C;

0.5 s 0.5 s 2 s

1 50

:

:

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Sub cool on error occurring SC

0 to 130

Cooling = T

63HS

−TH3

Heating = T

63HS

−TH2

Thermo-on time until error stops

0 to 999

0 to 130



turns.)

(Example) When 115°C;

0.5 s 0.5 s 2 s

1 15

0 to 999

(When it is 100 minutes or more, hundreds digit, tens



0.5 s 0.5 s 2 s

4 15

:

Minute

ON

1 2 3 4 5 6

Indoor pipe temperature/ Liquid (TH2 (3))

Indoor 3

−39 to 88

−39 to 88



ON

1 2 3 4 5 6

Indoor pipe temperature/ Cond./ Eva.

(TH5 (3))

Indoor 3

−39 to 88

−39 to 88



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

:

:

OCH583A 52


Controlling status of compressor operating frequency

ON

1 2 3 4 5 6

ON

1 2 3 4 5 6

Indoor pipe temperature/ Cond./ Eva.

(TH5 (4))

−39 to 88



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

• The tens digit

Display Compressor operating frequency control

1

2

Primary current control

Secondary current control

• The ones digit (In this digit, the total number of

activated control is displayed.)

Display Compressor operating frequency control

1

Preventive control for excessive temperature rise of discharge temperature

2

4

Preventive control for excessive temperature rise of condensing temperature

Frosting preventing control

Preventive control for excessive temp-

8

(Example) erature rise of heat sink

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 heat sink

LED

1a

Code display

−39 to 88


temperature are displayed by turns.) °C

ON

1 2 3 4 5 6

Time to current limit activates from compressor turns ON.

0 to 180

0 to 180

ON

1 2 3 4 5 6

U9 error details To be shown while error call is deferred.

Description

Normal

Overvoltage error

Undervoltage error

Input current sensor error

L

1

-phase open error

Abnormal power synchronous signal

Display

00

01

02

04

08

Display examples for multiple errors:

Overvoltage (01) + Undervoltage (02) = 03

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

Second

Code display

OCH583A 53

10-8. Request code list

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

Refer to indoor unit service manual for how to use the controllers and request codes for indoor unit.

Request content

Description

(Display range)

Unit Remarks

2

3

4

0

1

5

6

7

Operation state

Compressor-Operating current (rms)

Compressor-Accumulated operating time

Compressor-Number of operation times

Comp. surface temperature (TH32)

Outdoor unit -Liquid pipe 1 temperature (TH3)

Refer to 10-8-1. Detail Contents in Request Code.

0–50

0–9999

0–9999

3–217

−40–90

Outdoor unit: 2-phase pipe temperature (TH6) <cooling>

Condensing temperature (T

63HS

) <heating>

−39–88

13

14

15

16

17

18

8

9

10

11

12

19

Outdoor unit-Outside air temperature (TH7)

Outdoor unit-Heat sink temperature (TH8)

Discharge superheat (SHd)

Sub-cool (SC)

20

33

34

35

26

27

28

29

30

31

32

21

22

23

24

25

45

46

47

48

49

42

43

44

39

40

41

36

37

38

Compressor-Operating frequency

Compressor-Target operating frequency

Outdoor unit-Fan output step

Outdoor unit-Fan 1 speed

(Only for air conditioners with DC fan motor)

Outdoor unit-Fan 2 speed

(Only for air conditioners with DC fan motor)

LEV (A) opening

Primary current

DC bus voltage

Thermostat ON operating time

−39–88

−40–200

0–255

0–130

0–255

0–255

0–10

0–9999

0–9999

0–500

0–50

180–370

0–999

–

A

10 hours

100 times

:

:

:

:

:

:

:

Hz

Hz

Step rpm rpm

Pulses

A

V

Minutes

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

OCH583A 54

Request content

Description

(Display range)

96

97

98

99

92

93

94

95

85

86

87

88

89

70

71

72

73

74

75

67

68

69

64

65

66

82

83

84

79

80

81

76

77

78

57

58

59

60

61

62

63

53

54

55

56

50

51

52

90

Outdoor unit-Control state

Compressor-Frequency control state

Outdoor unit-Fan control state

Actuator output state

Error content (U9)

External input state (silent mode, etc.)

Outdoor unit-Capacity setting display

Outdoor unit-Setting information

91

Refer to 10-8-1.Detail Contents in Request Code.








Outdoor unit-Microprocessor version information

Outdoor unit-Microprocessor version information (sub No.)

Examples) Ver 5.01 → "0501"

Auxiliary information (displayed after version information)

Examples) Ver 5.01 A000 → "A000"

100

101

102

Outdoor unit - Error postponement history 1 (latest)

Outdoor unit - Error postponement history 2 (previous)

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

Displays postponement code. (" - - " is displayed if no postponement code is present)



Unit

–

Code

Code

Code

–

–

–

–

–

–

Ver

–

–

–

–

–

–

–

–

–

–

–

–

OCH583A 55

Remarks

Request content

Description

(Display range)

Unit Remarks

103

104

105

106

Error history 1 (latest)

Error history 2 (second to last)

Error history 3 (third to last)

Abnormal thermistor display

(TH3/TH6/TH7/TH8)

124

125

126

127

128

129

130

115

116

117

118

119

120

107

108

109

110

111

112

113

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

Comp. surface temperature (TH32) at time of error

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

114

Outdoor unit at time of error:

2-phase pipe temperature (TH6) <cooling>

Condensing temperature (T

63HS

) <heating>

121

122

123

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

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

Discharge superheat (SHd) at time of error

Sub-cool (SC) at time of error

Compressor-Operating frequency at time of error

Outdoor unit at time of error

• Fan output step


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


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

LEV (A) opening at time of error

Thermostat ON time until operation stops due to error

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



3 : TH3

6 : TH6

7 : TH7

8 : TH8

0 : No thermistor error

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

0–50

0–9999

0–9999

3–217

−40–90

−39–88

−39–88

−40–200

0–255

0–130

0–255

0–10

0–9999

0–9999

0–500

0–999

Code

Code

Code

Sensor number

–

A

10 hours

100 times

:

:

:

:

:

:

:

Hz

Step rpm rpm

Pulses

Minutes

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

OCH583A 56

10-8-1. Detail Contents in Request Code

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

Data display

C 4

Operation mode

Display

H d

0

C

Operation mode

STOP • FAN

COOL • DRY

HEAT

DEFROST

Relay output state

Operation mode

Relay output state

Display

Power currently supplied to compressor

–

5

6

3

4

0

1

2

7

8

A

ON

ON

Compressor

–

ON

ON

ON

ON

4-way valve Solenoid valve

– –

ON

ON

ON ON

ON

ON

ON

ON

ON

[Outdoor unit – Control state] (Request code :" 51")

Data display

0 0 0 0 Normal

State

0 0 0 1 Preparing for heat operation

0 0 0 2 Defrost

[Compressor – Frequency control state] (Request code :" 52")

Data display

0 0

Frequency control state

Display

0

1

2

1

Frequency control state 2


Current limit control

No current limit

Primary current limit control is ON.

Secondary current limit control is ON.


Display Discharge temperature Condensation temperature

Anti-freeze Heat sink temperature protection control overheat prevention d

E b

C

F

9

A

7

8

2

3

0

1

4

5

6

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

Controlled

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

Data display

0 0

Fan step correction value by heat sink temperature overheat prevention control

Fan step correction value by cool condensation temperature overheat prevention control

Display

− (minus)

0

1

2

Correction value

− 1

0

+1

+2

OCH583A 57

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

Data display

0 0

Actuator output state 1



Display

A b

8

9

E

F

C d

4

5

2

3

6

7

0

1

SV1

ON

ON

ON

ON

ON

ON

ON

ON

4-way valve

ON

ON

ON

ON

ON

ON

ON

ON

Compressor

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

Data display

0 0

Error content 1

Error content 2

ON

ON

ON

ON

ON

ON

ON

ON

Compressor is warming up

ON

ON

ON

ON

ON

ON

ON

ON

Error content 1

Display

Overvoltage error

5

6

7

8

9

2

3

4

0

1 d

E

F

A b

C

Undervoltage error

L

1

-phase open error


Display

4

5

6

2

3

7

0

1

52C

ON

ON

ON

ON

SV2

ON

ON

ON

ON

: Detected

Power synchronizing signal error

Error content 2 : Detected

Display Converter Fo PAM error

2

3

0

1

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

Data display

40

50

Capacity

160

200

SS

ON

ON

ON

ON

OCH583A 58

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

Data display 0 0

Setting information 1



Display

0

1

Defrost mode

Standard

For high humidity


Display

Single-/

3-phase

2

3

0

1

Single-phase

3-phase

Heat pump/ cooling only

Heat pump

Cooling only

Heat pump

Cooling only

OCH583A 59

11 DISASSEMBLY PROCEDURE





OPERATING PROCEDURE

Photo 1 1. Removing the service panel and top panel

(1) Remove the service panel fixing screws (4 for front/ 5 x

12), then slide the service panel downward to remove it.

(The service panel is fixed to the side panel (R) with a hook on the right side.)

(2) Remove the top panel fixing screws (3 for front and 3 for rear/ 5 x 12) to remove the top panel.

PHOTOS

Top panel fixing screws

Note: When removing service panel and top panel at the same time, count one less screw since they share a screw.

Wire grille fixing screws

Slide

Wire grille fixing screws

Top panel

Service panel

Side panel (R)

Service panel fixing screws

Cover panel (rear)

Cover panel (front) fixing screws

Cover panel (front)

2. Removing the fan motor (MF1, MF2)

(1) Remove the service panel. (See Photo 1)

(2) Remove the wire grille fixing screws (4 for front/ 5 x 12), then slide the wire grille upward to remove it. (See Photo 1)

(For the each fan motor on top and under)

(3) Remove the screw of nut (1 for front/ M6), then slide the propeller fan forward to remove it.


(4) Disconnect the connectors, CNF1 (WHT) and CNF2 (WHT)

on the controller circuit board in the electrical parts box.

(See Photo 4)

(5) Loosen the clamp for the lead wire on motor support and separator.

(6) Release the lead wire from the hole on separator.

(7) Remove the fan motor fixing screws (4 for front/ 5 x 20) to

remove the fan motor.


Photo 2

Propeller

Nut

Photo 3

Front panel

Fan motor fixing screws

Fan motor

Fan motor fixing screws

OCH583A 60


3. Removing the electrical parts box


(2) Remove the top panel. (See Photo 1)

(3) Disconnect the power supply cable from terminal block.

(4) Disconnect the indoor/outdoor connecting wire from terminal block.

(5) Disconnect the connector CNF1 (WHT), CNF2 (WHT),

TH3 (WHT), TH7/ 6 (RED), TH32 (BLK), 63H (YLW), 21S4

(GRN), LEV-A (WHT) and 63HS (WHT) from the controller circuit board.

<Symbols on the board>

• Fan motor (CNF1, CNF2)

• Thermistor <Liquid> (TH3)

• Thermistor <Ambient/ 2-Phase Pipe> (TH7/6)

• Thermistor <Comp. Surface> (TH32)

• High pressure switch (63H)

• 4-way valve (21S4)

• LEV (LEV-A)

• High pressure sensor (63HS)

(6) Loosen the clamps, fasteners and cable strap for the lead

wire in the electrical parts box and separator.

(See photo 4)

(7) Loosen the lead wires fixed to the pipes with bands.

(8) To disconnect the COMP lead wire, remove the terminal cover, then remove the COMP lead wire fixing screws (4 for front/ 5 x 12).

(9) Remove the electrical parts box fixing screws (2 for front/

4 x 10), then slide the electrical parts box upward to remove it.

(The electrical parts box is fixed to the side panel (R) with a hook on the right side, and to the separator duct with a hook on the left side.)

Photo 4

Controller circuit board

Terminal block

(Power supply)

Valve bed fixing screw

Valve bed

Compressor

PHOTOS

Electrical parts box

Electrical parts box fixing screws

Terminal block

(Indoor/Outdoor)

Side panel (R)

OCH583A 61


4. Disassembling the electrical parts box

(1) Disconnect all the connectors on the controller circuit board.

(2) To remove the controller circuit board, release it from the support.

(3) Remove cont base fixing screws (2 for front/ 4 x 10). (Photo 5)

(The cont. base is fixed to the cont base piece with a hook on the left side.)

(4) Disconnect all the connectors on the noise filter circuit board. (Photo 6)

(5) To remove the noise filter circuit board, release it from the support.

(6) Remove N.F. base fixing screws (2 for front/ 4 x 10). (Photo 7)

(7) Disconnect all the connectors on the power circuit board.

(8) To remove the power circuit board, remove power board fixing screws (4 for front/ 4 x 12), then release the board from the support. (Photo 8)

(9) The reactor is attached to the rear side of the electrical parts box. (Photo 9)

(To remove the reactor, the electrical parts box must be separated from the outdoor unit.)

Note: When reassembling the electrical parts box, make sure the wirings are correct.

Photo 5

Screw

Photo 6 Photo 7

Noise filter circuit board

(N.F.) Screw

PHOTOS

Cont base

Controller circuit board (C.B.)

Screw

Noise filter base

Screw

Reactor

Screw

Photo 8 Photo 9

Screw

Screw

Screw

Power circuit

board (P.B)

5. Removing the thermistor <2-Phase Pipe> (TH6)



(3) Disconnect the connector TH7/6 (RED) on the controller

circuit board in the electrical parts box. (See Photo 4)

(4) Loosen the fastener for the lead wire in the electrical parts box.

(5) Loosen the clamp for the lead wire on the top of electrical parts box.

(6) Pull out the thermistor <2-phase pipe> (TH6) from thermistor clip.

Note: When replacing thermistor <2-phase pipe>

(TH6), replace it together with thermistor

<Ambient> (TH7) since they are combined together. Refer to procedure No.5 on the next page to remove the thermistor <Ambient> (TH7).

Photo 10

Cont. box top

Electrical parts box

Thermistor

<2-phase pipe>

(TH6)

OCH583A 62


6. Removing the thermistor <Ambient> (TH7)



(3) Disconnect the connector TH7/6 (RED) on the controller circuit board in the electrical parts box. (See Photo 4)

(4) Loosen the fastener for the lead wire in the electrical parts box.

(5) Loosen the clamps for the lead wire on top of the electrical

parts box.

(6) Pull out the thermistor <Ambient> (TH7) from thermistor holder.

Photo 11

Note: When replacing thermistor <Ambient> (TH7), replace it together with thermistor <2-phase pipe>

(TH6), since they are combined together. Refer to procedure No.4 in the previous page to remove the thermistor <2-phase pipe>(TH6).

PHOTOS

Lead wire of thermistor <Ambient> (TH7)

Sensor holder

7. Removing the thermistor <Liquid> (TH3), and thermistor

<Comp. surface> (TH32).


(2) Disconnect the connector, TH3 (WHT) and TH32 (BLK) on the controller circuit board in the electrical parts box. (See

Photo 4)

(3) Loosen the fastener, cable strap and band for the lead wire on the controller circuit board in the electrical parts box.

(4) Loosen the clamp for the lead wire on separator.

(5) Pull out the thermistor <Liquid> (TH3) from thermistor clip.

(6) Remove the top damper, then pull out the thermistor

<Comp. surface> (TH32) from thermistor holder.

(7) Disconnect the connector from the high pressure sensor, then remove the high pressure sensor.

Photo 12

High pressure sensor

(63HS)

Thermistor <Liquid> (TH3)

Thermistor

<Comp. surface>

(TH32)

Compressor Damper

OCH583A 63


8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A)) and lead wire for high pressure switch.



(3) Remove the electrical parts box. (See Photo 4)

(4) Loosen the clamp for the lead wire on separator.

[Removing the lead wire for high pressure switch]

(5) Disconnect the lead wire from the high pressure switch.

[Removing the 4-way valve coil]

(5) Remove the 4-way valve coil fixing screw (1 for front/ M5) to remove the 4-way valve coil.

(6) Slide the 4-way valve coil forward to remove it.

Photo 13

4-way valve coil (21S4)

[Removing the LEV coil]

(5) Loosen the lead wires fixed to the pipes with bands.

(6) Slide the LEV coil upward to remove it.

PHOTOS

High pressure switch

LEV coil

(LEV A)

Accumulator

9. Removing the 4-way valve, LEV (LEV (A)) and high pressure switch.




(4) Remove the cover panel (front). (See Photo 1)

(5) Remove the cover panel (rear). (See Photo 1)

(6) Remove the valve bed. (See Photo 14)

(7) Remove the side panel (R).

(8) Recover refrigerant.

[Removing the 4-way valve]

(9) Remove the 4-way valve coil. (See photo 13)

(10) Remove the welded part of 4-way valve (4 positions) to remove the 4-way valve.

[Removing the LEV]

(9) Remove the LEV coil. (See photo 13)

(10) Remove the welded part of LEV (2 positions) to remove the LEV.

[Removing the high pressure switch]

(9) Disconnect the lead wire from the high pressure switch.

(10) Remove the welded part of high pressure switch

(1 position) to remove the high pressure switch.

Note 1: Recover refrigerant without spreading it in the air.

Note 2: The welded part can be removed easily by removing the side panel (R).

Note 3: When installing the following parts, cover it with a wet cloth to prevent it from heating as the temperature below, then braze the pipes so that the inside of pipes are not oxidized;

• 4-way valve, 120°C or more

• LEV, 120°C or more

• High pressure switch, 100°C or more

OCH583A 64


10. Removing the compressor (MC)




(4) Remove the cover panel (front). (See Photo1)


(6) Remove the valve bed. (See photo 14)

(7) Remove the side panel (R). (See Photo 1)

(8) Remove the front panel fixing screws (5 for front/ 5x12 and 2 for front/ 4x10), then slide the front panel upward to remove it.

(The front panel is fixed with 4 hooks; 3 on the left side fixing to the side panel (L), and the other on the right side fixing to the separator.)

(9) Release the lead wire for FM1 and FM2 from the hole on separator.

(10) Remove the separator fixing screws (4 for front/ 4x10),

then slide the separator upward to remove it.

(The separator is fixed to a hook of the side plate.)


(12) Remove the welded part of compressor (2 positions).

(13) Remove the 3 compressor fixing nuts (M6) to remove the

compressor.

Note 1: Recover refrigerant without spreading it in the air.

Note 2: The compressor can be easily removed by

removing separator.

Photo 14

Valve bed

Separator

11. Removing the power receiver



(3) Remove the electrical parts box. (See photo 4)

(4) Remove the cover panel (front). (See Photo 1)


(6) Remove the valve bed. (See Photo 14)

(7) Remove the side panel (R). (See Photo 1)


(9) Remove the welded part of the accumulator (2 positions) to remove the accumulator.

(10) Remove the receiver leg fixing screws (2 for front/ 4 x 10), then slide the power receiver forward to remove it.

(The power receiver is fixed to the base with a hook on the bottom.)

Note: Recover refrigerant without spreading it in the air.

Photo 15

Compressor

(MC)

Separator fixing screw

PHOTOS

Accumulator

Inlet

Outlet

Accumulator

Receiver leg

OCH583A 65

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

C Copyright 2015 MITSUBISHI ELECTRIC CORPORATION

Distributed in Aug. 2015 No. OCH583 REVISED EDITION-A

Distributed in Mar. 2015 No. OCH583

Made in Japan

New publication, effective Aug. 2015

Specifications are subject to change without notice.

service manual r410a

SPLIT-TYPE, AIR TO WATER HEAT PUMP

SERVICE MANUAL

R410A

August 2015

PUHZ-SW160YKA.UK

PUHZ-SW160YKAR1.UK

PUHZ-SW200YKA.UK

PUHZ-SW200YKAR1.UK

PUHZ-SW160YKA-BS.UK

PUHZ-SW160YKAR1-BS.UK

PUHZ-SW200YKA-BS.UK

PUHZ-SW200YKAR1-BS.UK

TECHNICAL CHANGES

1 REFERENCE MANUAL

2 SAFETY PRECAUTION

Preparation before the repair service.

Precautions during the repair service.

Unit

Gravimeter

2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL

3 FEATURES

CHARGELESS SYSTEM

PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT

Maximum 30 m

4 SPECIFICATIONS

5 DATA

(at 20°C)

Service Ref.

Compressor model ANB52FRNMT

Winding

Resistance

( " )

U-V

U-W

W-V

0.30

0.30

0.30

6 OUTLINES AND DIMENSIONS

7 WIRING DIAGRAM

8 WIRING SPECIFICATIONS

9 REFRIGERANT SYSTEM DIAGRAM

10 TROUBLESHOOTING

Linear expansion valve

• The tens digit (Total display for applied setting)

Setting details Display details

• The ones digit

Setting details Display details

10-8-1. Detail Contents in Request Code

11 DISASSEMBLY PROCEDURE

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Table of contents