Mitsubishi PUHZ-SW120YHA.UK, PUHZ-SW100VHA.UK, PUHZ-SW75VHA-BS.UK, PUHZ-SW100VHA-BS.UK, PUHZ-SW100YHA-BS.UK Service Manual

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SERVICE MANUAL

CONTENTS

1. REFERENCE MANUAL

..................................

2. SAFETY PRECAUTION

..................................

3. FEATURES

......................................................

4. SPECIFICATIONS

...........................................

5. DATA

.............................................................

6. OUTLINES AND DIMENSIONS

....................

7. WIRING DIAGRAM

.......................................

8. WIRING SPECIFICATIONS

..........................

REFRIGERANT SYSTEM DIAGRAM

...............

10. TROUBLESHOOTING

...................................

11. DISASSEMBLY PROCEDURE

.....................

No.OCH533

REVISED EDITION-A

SPLIT-TYPE, AIR TO WATER HEAT PUMP

R410A

October 2012

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

Salt proof model

PUHZ-SW75VHA-BS

PUHZ-SW100VHA-BS

PUHZ-SW100YHA-BS

PUHZ-SW120VHA-BS

PUHZ-SW120YHA-BS

Note:

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

PUHZ-SW75VHA-BS.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA-BS.UK

Outdoor unit [Model names]

PUHZ-SW75VHA

PUHZ-SW100VHA

PUHZ-SW100YHA

PUHZ-SW120VHA

PUHZ-SW120YHA

[Service ref.]

PUHZ-SW75VHA.UK PUHZ-SW100VHA.UK PUHZ-SW100YHA.UK PUHZ-SW120VHA.UK PUHZ-SW120YHA.UK

PARTS CATALOG (OCB533)

Revision:

•

The function description of SW7-3, 7-4 and 7-5 (Page

52) have been corrected

REVISED EDITION-A.

• Please void OCH533.

REFERENCE MANUAL

INDOOR UNIT SERVICE MANUAL

Model name Service ref. Service manual No.

EHST20C-VM6HB EHST20C-YM9HB EHST20C-VM6B EHST20C-YM9B EHST20C-VM6EB EHST20C-YM9EB EHST20C-VM6SB EHPT20X-VM2HB EHPT20X-VM6HB EHPT20X-YM9HB EHPT20X-VM6B EHPT20X-YM9B

EHST20C-VM6HB.UK EHST20C-YM9HB.UK EHST20C-VM6B.UK EHST20C-YM9B.UK EHST20C-VM6EB.UK EHST20C-YM9EB.UK EHST20C-VM6SB.UK EHPT20X-VM2HB.UK EHPT20X-VM6HB.UK EHPT20X-YM9HB.UK EHPT20X-VM6B.UK EHPT20X-YM9B.UK

OCH531

EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B EHPX-VM6B EHPX-YM9B ERSC-VM2B

EHSC-VM6B.UK EHSC-YM9B.UK EHSC-VM6EB.UK EHSC-YM9EB.UK EHPX-VM2B.UK EHPX-VM6B.UK EHPX-YM9B.UK ERSC-VM2B.UK

OCH532

OCH533

2 SAFETY PRECAUTION

Cautions for units utilizing refrigerant R410A

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Use new refrigerant pipes.

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

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

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

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

· Be sure to perform replacement operation before test run.

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

· Avoid using thin pipes.

Do not use refrigerant other than R410A.

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

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.

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.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

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

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

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.

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

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.

2-1. ALWAYS OBSERVE FOR SAFETY

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

Preparation before the repair service.

• Prepare the proper tools.

• Prepare the proper protectors.

• Provide adequate ventilation.

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

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

Precautions during the repair service.

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

• Do not pour water into the electric parts.

• Do not touch the refrigerant.

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

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

exercise great caution not to touch the live parts.

OCH533

Gravimeter

Unit

[3] Service tools

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

No. Tool name Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

specifications

. (UNF1/2)

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

2 Charge hose ·Only for R410A

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

3 Electronic scale

4 Gas leak detector ·Use the detector for R134a, R407C or R410A.

5 Adaptor for reverse flow check ·Attach on vacuum pump.

6 Refrigerant charge base

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

·Cylinder with syphon

8 Refrigerant recovery equipment

[1] Cautions for service

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

[2] Additional refrigerant charge

When charging directly from cylinder

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

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

OCH533

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

Flowchart

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

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

• If the diameter of the existing pipes is different from the speciﬁ ed diameter, refer to technological data materials to conﬁ rm if the pipes can be used.



 

Measure the existing pipe thickness and check for damage.

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

Check if the existing outdoor unit can operate.

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

Disconnect the existing outdoor unit from the pipes.

Attach the new outdoor unit

Test run

* Refer to 10-2. TEST POINT UNDER TEST RUN.

The existing pipes cannot be reused. Use new pipes.

* If the existing outdoor unit cannot operate, use a refrigerant recovery device to collect the refrigerant.

Use new pipes for SW75, SW100 and SW120 models.

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

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.

OCH533

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 0.7mm or below.)

2 Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness and intensity, 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 intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes. Use torque wrench corresponding to each dimension.

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

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

6.35

9.52

12.70

15.88

19.05

0.8

1.0

—

0.8

1.0

Nominal

dimensions(inch)

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22

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

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions(inch)

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22

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

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions(inch)

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A R22

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve Vacuum pump

Flare tool

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

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

Prevent compressor malfunction when charging refrigerant by

spraying liquid refrigerant Prevent gas from blowing out

when detaching charge hose Vacuum drying and air purge

Flaring work of piping

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

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

Tool exclusive for R410A Tools for other refrigerants can

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

Tool exclusive for R410A

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

(Usable if equipped with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped with adopter for rever se flow)

(Usable by adjusting flaring dimension)

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

Dimension A

Dimension B

OCH533

3 FEATURES

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max. 10m (PUHZ-SW75-120))

The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regardless of the length (10m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality and reliability of the work done. It also helps to speed up the installation time.

PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK

OCH533

4 SPECIFICATIONS

<Reference data> Plate heat exchanger (ACH70-40 plates)

Nominal water ﬂ ow L/min 22.9

Heating (A7/W35)

Capacity kW 8.00

COP 4.40

Power input kW 1.82

Heating (A7/W45)

Capacity kW 8.00

COP 3.40

Power input kW 2.35

Heating (A2/W35)

Capacity kW 7.50

COP 3.40

Power input kW 2.20

Heating (A2/W45)

Capacity kW 7.50

COP 2.83

Power input kW 2.65

Nominal water ﬂ ow L/min 18.9

Cooling (A35/W7)

Capacity kW 6.60

EER 2.55

Power input kW 2.59

Cooling (A35/W18)

Capacity kW 7.10

EER 4.01

Power input kW 1.77

Rating conditions

Nominal operating condition

Heating (A7/W35)

Outside air temperature (Dry-bulb) + 7 °C

Outside air temperature (Wet-bulb) + 6 °C

Water temperature (inlet/outlet) + 30 °C/+ 35 °C

Heating (A7/W45)

Outside air temperature (Dry-bulb) + 7 °C

Outside air temperature (Wet-bulb) + 6 °C

Water temperature (inlet/outlet) + 40 °C/+ 45 °C

Heating (A2/W35)

Outside air temperature (Dry-bulb) + 2 °C

Outside air temperature (Wet-bulb) + 1 °C

Water temperature (inlet/outlet) + 30 °C/+ 35 °C

Heating (A2/W45)

Outside air temperature (Dry-bulb) + 2 °C

Outside air temperature (Wet-bulb) + 1 °C

Water temperature (inlet/outlet) + 40 °C/+ 45 °C

Cooling (A35/W7)

Outside air temperature (Dry-bulb) + 35 °C

Outside air temperature (Wet-bulb) + 24 °C

Water temperature (inlet/outlet) + 12 °C/+ 7 °C

Cooling (A35/W18)

Outside air temperature (Dry-bulb) + 35 °C

Outside air temperature (Wet-bulb) + 24 °C

Water temperature (inlet/outlet) + 23 °C/+ 18 °C

Note: "COP" and "Power input" in the above table are values that does NOT contains the "pump input (based on EN 14511)".

Nominal water ﬂ ow L/min 32.1

Heating (A7/W35)

Capacity kW 11.2

COP 4.45

Power input kW 2.51

Heating (A7/W45)

Capacity kW 11.2

COP 3.42

Power input kW 3.27

Heating (A2/W35)

Capacity kW 10.0

COP 3.32

Power input kW 3.02

Heating (A2/W45)

Capacity kW 10.0

COP 2.66

Power input kW 3.76

Nominal water ﬂ ow L/min 26.1

Cooling (A35/W7)

Capacity kW 9.10

EER 2.75

Power input kW 3.31

Cooling (A35/W18)

Capacity kW 10.0

EER 4.35

Power input kW 2.30

(SW75)

(SW100)

Nominal water ﬂ ow L/min 45.9

Heating (A7/W35)

Capacity kW 16.0

COP 4.10

Power input kW 3.90

Heating (A7/W45)

Capacity kW 16.0

COP 3.23

Power input kW 4.95

Heating (A2/W35)

Capacity kW 12.0

COP 3.24

Power input kW 3.70

Heating (A2/W45)

Capacity kW 12.0

COP 2.52

Power input kW 4.76

Nominal water ﬂ ow L/min 35.8

Cooling (A35/W7)

Capacity kW 12.5

EER 2.32

Power input kW 5.38

Cooling (A35/W18)

Capacity kW 14.0

EER 4.08

Power input kW 3.43

(SW120)

OCH533

/min(CFM

)

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

kg(lbs) kg(lbs)

L mm(in.) mm(in.)

Power supply (phase, cycle, voltage) Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices

Crankcase heater Heat exchanger Fan Fan(drive) % No. Fan motor output Airflow Defrost method Noise level

Dimensions

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

Connection method Between the indoor &

outdoor unit

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

Service Ref.

PUHZ-SW75VHA-BS.UK

PUHZ-SW75VHA.UK

TNB220FLHMT

Propeller fan % 1

0.074

55(1,940)

48 51

943(37-1/8)

75(165)

3.2(7.0)

0.87(FV50S)

Max. 40m

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

Inverter

—

Plate fin coil

Reverse cycle

950(37-3/8)

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

R410A

9.52(3/8)

15.88(5/8) Flared Flared

Max. 10m

HP switch

Comp. surface thermo

Discharge thermo

Over current detection

Single, 50Hz, 230V

OUTDOOR UNIT

REFRIGERANT PIPING

1.3

/min(CFM

)

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

kg(lbs)

L mm(in.) mm(in.)

Power supply (phase, cycle, voltage) Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices

Crankcase heater Heat exchanger Fan Fan(drive) % No. Fan motor output Airflow Defrost method Noise level

Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

Service Ref.

PUHZ-SW100VHA-BS.UK

50 54

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

Inverter

—

Plate fin coil

Propeller fan % 2

0.060+0.060 100(3,530)

Reverse cycle

950(37-3/8)

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

1,350(53-1/8)

118(260)

R410A

4.6(10.1)

1.40(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 75m

29.5

HP switch

LP switch

Discharge thermo Comp. surface thermo Over current detection

Single 50Hz, 230V

OUTDOOR UNIT

REFRIGERANT PIPING

51 54

ANB42FNEMT

2.5

ANB33FNEMT

2.5

PUHZ-SW120VHA-BS.UK

PUHZ-SW100VHA.UK

PUHZ-SW120VHA.UK

OCH533

3 phase, 50Hz, 400V

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

Inverter

—

Plate fin coil

Propeller fan % 2

0.060+0.060 100(3,530)

Reverse cycle

950(37-3/8)

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

1,350(53-1/8)

130(287)

R410A

4.6(10.1)

1.40(FV50S)

9.52(3/8)

15.88(5/8) Flared Flared

Max. 30m Max. 75m

PUHZ-SW100YHA-BS.UK

PUHZ-SW120YHA-BS.UK

PUHZ-SW100YHA.UK

PUHZ-SW120YHA

/min(CFM

)

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

kg(lbs)

L mm(in.) mm(in.)

Power supply (phase, cycle, voltage) Max. current External finish Refrigerant control Compressor Model Motor output Starter type Protection devices

Crankcase heater Heat exchanger Fan Fan(drive) % No. Fan motor output Airflow Defrost method Noise level

Dimensions

Weight Refrigerant

Charge

Oil (Model) Pipe size O.D.

Connection method Between the indoor &

outdoor unit

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

Service Ref.

OUTDOOR UNIT

REFRIGERANT PIPING

ANB33FNDMT

2.5

ANB42FNDMT

2.5

HP switch LP switch

Discharge thermo

Comp.surface thermo

Over current detection

49 51

50 52

OCH533

5 DATA

5-1. REFILLING REFRIGERANT CHARGE (R410A : kg)

5-2. COMPRESSOR TECHNICAL DATA

Service Ref.

Piping length (one way)

Initial

charged

10m 20m 30m 40m 50m 60m 75m

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

3.2 3.6 4.0 4.6 — — — 3.2

PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK

4.6 4.8 5.0 5.6 6.2 6.8 7.5 4.6

PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK

4.6 4.8 5.0 5.6 6.2 6.8 7.5 4.6

U-V

U-W W-V

Service Ref.

Compressor model

Winding

Resistance

(  )

ANB33FNEMT

(at 20°C)

0.19

PUHZ-SW100VHA.UK

PUHZ-SW100VHA-BS.UK

ANB33FNDMT

0.30

ANB42FNDMTANB42FNEMT

0.30

PUHZ-SW100YHA.UK

PUHZ-SW100YHA-BS.UK

TNB220FLHMT

0.88

PUHZ-SW75VHA.UK

PUHZ-SW75VHA-BS.UK

PUHZ-SW120YHA.UK

PUHZ-SW120YHA-BS.UK

PUHZ-SW120VHA.UK

PUHZ-SW120VHA-BS.UK

0.19

Additional charge is required for pipes longer than 10 m.

OCH533

5-3. NOISE CRITERION CURVES

1.5m

MICROPHONE

UNIT

GROUND

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

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

BAND CENTER FREQUENCIES, Hz

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

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

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

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

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK

COOLING

MODE

HEATING

SPL(dB)

LINE

OCH533

6 OUTLINES AND DIMENSIONS

Unit : mm

Air Intake

Rear Air Intake

Handle for moving

322

950

473

943

*1 447 *1 431

673

Handle for moving

Service panel

Earth terminal

Left···Power supply wiring

Right···Indoor/Outdoor wiring

Terminal Connections

Rear piping cover

Front piping cover

Side Air Intake

Handle for moving

28 370 19

417

57 41

600 175175

330

Rear Air Intake

Air Discharge

Side Air Intake

Installation Feet

2-U Shaped notched holes

(Foundation Bolt M10)

2-12 % 36 oval holes

(Foundation Bolt M10)

220 145 145 14530

81 219

Bottom piping hole

(Knockout)

Drain hole

(5-:33)

Piping Knockout Hole Details

19 55

23 27 92

4075

73 63

Right piping hole

(Knockout)

Right trunking hole

(Knockout)

Power supply wiring hole

(2-:27Knockout)

:92

27 55

7323 63

Front piping hole

(Knockout)

Front trunking hole

(Knockout)

Power supply wiring hole

(2-:27Knockout)

:92

4045

27 55 23 73 63

Rear piping hole

(Knockout)

Rear trunking hole

(Knockout)

Power supply wiring hole

(2-:27Knockout)

:92

Example of Notes

 Refrigerant GAS pipe connection (FLARE):15.88(5/8 inch)

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

*1...Indication of STOP VALVE connection location.

Over

Less than

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

3 FOUNDATION BOLTS2 SERVICE SPACE

1 FREE SPACE (Around the unit)

The diagram below shows a

basic example.

Explanation of particular details is

given in the installation manuals etc.

Over10

500

Over100

Dimensions of space needed

for service access are

shown in the below diagram.

Service space

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

FOUNDATION

over 100mm

over 500mm

over 10mm

FREE

over 10mm

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

OCH533

Handle for moving

Side Air Intake

Front piping cover

Rear piping cover

Air intake

Rear Air Intake

Handle for moving

Terminal connection

Left···Power supply wiring

Right···Indoor/Outdoor wiring

Earth terminal

Service panel

Handle for moving

Air Discharge

Rear Air Intake

Side Air Intake

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

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

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

Example of Notes

Piping Knockout Hole Details

600175 175

330

417

42 66

53 56

(19)

28 370

2-U Shaped notched holes

(Foundation Bolt M10)

2-12 x 36 Oval holes

(Foundation Bolt M10)

Installation Feet

45 40

27 55

23 73 63

Rear piping hole

(Knockout)

Rear trunking hole

(Knockout)

Power supply wiring hole

(2-

27Knockout)

19 55

75 40

73 63 23 27 92

Right piping hole

(Knockout)

Right trunking hole

(Knockout)

Power supply wiring hole

(2-

27Knockout)

4540

27 55

23 73 63

Front piping hole

(Knockout)

Front trunking hole

(Knockout)

Power supply wiring hole

(2-

27Knockout)

14514522030 145

81 219

Bottom piping hole

(Knockout)

Drain hole

(5-W33)

1350

950

*1 447 *1 431

371 635

322

Handle for moving

VHA

YHA

1,079

930

Unit : mm

Over

Less than

Piping and wiring connections

can be made from 4 directions:

front, right, rear and below.

4 PIPING-WIRING DIRECTIONS

3 FOUNDATION BOLTS2 SERVICE SPACE

1 FREE SPACE (Around the unit)

Please secure the unit firmly

with 4 foundation (M10) bolts.

(Bolts and washers must be

purchased locally.)

Dimensions of space needed

for service access are

shown in the below diagram.

The diagram below shows a

basic example.

Explantion of particular details is

given in the installation manuals etc.

FOUNDATION

500

150

Service space

FREE

Ove

r 10mm

Over 10mm

Ove

r 150mm

Ove

r 1000mm

PUHZ-SW100VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW100YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120VHA.UK PUHZ-SW120VHA-BS.UK PUHZ-SW120YHA.UK PUHZ-SW120YHA-BS.UK

OCH533

7 WIRING DIAGRAM

12345678

OFF

75V

MODEL

SW6

1 MODEL SELECT

The black square ( ) indicates a switch position.

SW5-6

OFF

123456

2 SW5 -1 to 5 : Function Switch

SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 MC MF1 21S4 63H 63HS TH3 TH4 TH6 TH7 TH8 TH34 LEV-A, LEV-B ACL CY1, CY2

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

P. B.

N. F.

C. B.

Power Circuit Board Connection Terminal <L/N-Phase> Connection Terminal <U/V/W-Phase> Power Module Converter Main Smoothing Capacitor Noise Filter Circuit Board Connection Terminal <L-Phase> Connection Terminal <N-Phase> Connection Terminal <Ground> 52C Relay Controller Circuit Board Switch <Manual Defrost, Defect History, Record Reset, Refrigerant Address> Switch <Test Operation>

R, S U, V, W IPM PFC CB1, CB2, CB3

LI, LO NI, NO EI, E2, E3 52C

SW1 SW4

SW5 SW6 SW7 SW8 SW9 SWP CN31 CNDM CN51 SV1/CH SS CNM LED1, LED2 F1, F2, F3, F4 X51, X52, X54

Switch <Function Switch, Model Select> Switch <Model Select> Switch <Function Switch> Switch <Function Switch> Switch <Function Switch> Switch <Pump Down> Connector <Emergency Operation> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> LED <Operation Inspection Indicators> Fuse <T6.3AL250V> Relay

C. B.

P. B.

TH8

TH6TH7 TH4TH3

CB3

N. F.

21S4

L N S1S2S3

INDOOR

UNIT

POWER SUPPLY

~/N 230V 50Hz

TB1

RED

WHT

BLK

t° t° t° t° t°

t°

CN5

(RED)

CNAC2

(RED)

CNAC1

(WHT)

LO N O

LI NI

CN52C

(BLK)

1 3

1 2

52C

CN2

(WHT)

CN3

(WHT)

CN5

(RED)

CN4

(WHT)

1 2

LEV-A

CNS

(WHT)

CNAC (WHT)

CNDC (PNK)

21S4

(GRN)

CN2

(WHT)

CN4

(WHT)

CN3S

(WHT)

TH7/6 (RED)

TH3

(WHT)

TH4

(WHT)

TRANS

CNVMNT

(WHT)

CNMNT

(WHT)

CNM

(WHT)

LED1

LED2

X52

SV1 /CH

(GRY)

X54

63H

(YLW)

CN52C (RED)

141221

311 5

1 3

3 1

12 34

31 31

LEV-A (WHT)

CB2CB1

U V

PFC

IPM

ACL

E3E2

RED

BLU

RED

WHT

RED

WHT

YLW

ORN

BRN

RED

WHT

RED

WHT

CY1 CY2

GRN/YLW

(WHT)

X51

MF1

CNF1 (WHT)

63H

TH34

21 TH34 (RED)

63HS

(WHT)

63HS

LEV-B (RED)

LEV-B

CNDM

(WHT)

CN51

(WHT)

1 3

CNF2 (WHT)

63L

(RED)

+++

SW7

SW6SW1

SW9

CN31

*1*

SW5SW8SW4SWP

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

OCH533

PUHZ-SW100VHA.UK PUHZ-SW120VHA.UK PUHZ-SW100VHA-BS.UK PUHZ-SW120VHA-BS.UK

100V

120V

SYMBOL NAME SYMBOL NAME SYMBOL NAME TB1 MC MF1, MF2 21S4 63H 63L 63HS TH3 TH4 TH6 TH7 TH8 TH34 LEV-A, LEV-B DCL CB CY1, CY2

Terminal Block <Power Supply, Indoor/Outdoor> Motor for Compressor Fan Motor Solenoid Valve (Four-Way Valve) High Pressure Switch Low Pressure Switch High Pressure Sensor Thermistor <Liquid> Thermistor <Discharge> Thermistor <2-Phase Pipe> Thermistor <Ambient> Thermistor (internal) <Heat Sink> Thermistor <Comp. Surface> Linear Expansion Valve Reactor Main Smoothing Capacitor Capacitor

P. B. Power Circuit Board

Connection Terminal <U/V/W-Phase> Connection Terminal <L-Phase> Connection Terminal <N-Phase> Connection Terminal Connection Terminal Connection Terminal <Reactor> Power Module Connection Terminal <Ground> 52C Relay Controller Circuit Board Switch <Manual Defrost, Defect History, Record Reset, Refrigerant Address> Switch <Test Operation> Switch <Function Switch, Model Select> Switch <Model Select>

SW7 SW8 SW9 SWP CN31 CNDM CN51 SV1/CH SS CNM LED1, LED2 F1, F2, F3, F4 X51, X52, X54

Switch <Function Switch> Switch <Function Switch> Switch <Function Switch> Switch <Pump Down> Connector <Emergency Operation> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> LED <Operation Inspection Indicators> Fuse <T6.3AL250V> Relay

U, V, W LI NI P2 N2 DCL1, DCL2 IGBT EI, E2, E3, E4 52C

C. B.

SW1 SW4

SW5 SW6

POWER SUPPLY ~/N 230V 50Hz

INDOOR UNIT

P. B.

DCL

L N S1 S2 S3

TB1

RED

WHT

BLK

CN2

(WHT)

CN4

(WHT)

RED

BLU

YLW

ORN

BRN

WHT

RED

GRN/YLW

BLK

(RED)

CNAC2

(WHT)

CNAC1

LINI

CN52C

(RED)

1 3

52C

DCL1

DCL2

UVW

CNDC (PNK)

BLK

CY1 CY2

IGBT

RED WHT

C. B.

TH6TH7 TH4TH3

21S4

t° t° t° t°

LEV-A

CNS

(WHT)

CNAC (WHT)

CNDC (PNK)

21S4

(GRN)

CN2

(WHT)

CN4

(WHT)

TH7/6 (RED)

TH3

(WHT)

TH4

(WHT)

TRANS

CNVMNT

(WHT)

CNMNT

(WHT)

CNM

(WHT)

LED1

LED2

X52

SV1 /CH

(GRY)

X54

63H

(YLW)

141221

311 5

114

3 1

31 31

LEV-A (WHT)

(WHT)

X51

MS 3~

MF1

63L63H

63L

(RED)

TH34

t°

21 TH34 (RED)

63HS

(WHT)

63HS

LEV-B (RED)

LEV-B

MF2

CNF2 (WHT)

CNF1 (WHT)

CN52C (RED)

t°

TH8

CN3S

(WHT)

1 3

CNDM

(WHT)

CN51

(WHT)

1 3

MS 3~

12345678

OFF

MODEL

SW6 SW5-6*2

OFF

123456

12345678

OFF

123456

2 SW5 -1 to 5 : Function Switch

SW7

SW6SW1

SW9

CN31

*1*

SW5SW8SW4SWP

1 MODEL SELECT

The black square ( ) indicates a switch position.

OCH533

TB1 TB2 MC MF1, MF2 21S4 63H 63L 63HS TH3 TH4 TH6 TH7 TH8 TH34 LEV-A, LEV-B ACL1, ACL2, ACL3, ACL4 CY1, CY2 CK RS

Terminal Block <Power Supply> Terminal Block <Indoor/Outdoor> Motor for Compressor Fan Motor Solenoid Valve (Four-Way Valve) High Pressure Switch Low Pressure Switch High Pressure Sensor Thermistor <Liquid> Thermistor <Discharge> Thermistor <2-Phase Pipe> Thermistor <Ambient> Thermistor <Heat Sink> Thermistor <Comp. Surface> Linear Expansion Valve Reactor Capacitor Capacitor Rush Current Protect Resistor

Power Circuit Board Connection Terminal <U/V/W-Phase>

P. B.

TB-U/V/W

Noise Filter Circuit Board Connection Terminal

<L1/L2/L3/N-Power Supply

N. F.

LI1/LI2/LI3/NI

Connection Terminal

<L1/L2/L3/N-Power Supply

LO1/LO2/LO3/NO

Converter Circuit Board

CONV. B.

Connection Terminal <Ground>

GD1, GD3

Connection Terminal <L1-Power Supply>

L1-A1/IN

Connection Terminal <L1-Power Supply>

L1-A2/OU

Connection Terminal <L2-Power Supply>

L2-A2/OU

Connection Terminal <L3-Power Supply>

L3-A2/OU

Connection Terminal

N-IN

Connection Terminal

CK-OU

SYMBOL NAME SYMBOL NAME SYMBOL NAME

Connection Terminal

<L1/L2/L3-Power Supply

TB-L1/L2/L3

SW4 SW5 SW6 SW7 SW8 SW9 SWP CN31 CNDM CN51 SV1/CH SS CNM LED1, LED2 F1, F2, F3, F4 X51, X52, X54

SW1

C. B.

Connection Terminal

TB-N

52C Relay

X52CA

Switch <Manual Defrost, Defect History, Record Reset, Refrigerant Address> Switch <Test Operation> Switch <Function Switch, Model Select> Switch <Model Select> Switch <Function Switch> Switch <Function Switch> Switch <Function Switch> Switch <Pump Down> Connector <Emergency Operation> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> Connector <Connection for Option> LED <Operation Inspection Indicators> FUSE <T6.3AL250V> Relay

Controller Circuit Board

12345678

OFF

100Y

MODEL

SW6 SW5-6*2

OFF

120Y

OFF

123456

2 SW5 -1 to 5 : Function Switch

P. B.

POWER SUPPLY 3N~ 400V 50Hz

TB1

RED

WHT

BLK

L1 L2 L3

N. F.

CNAC1

(WHT)

CNDC (PNK)

CNL (BLU)

CNAC2

(RED)

CNCT (RED)

LO1

LO2

LO3

GD1

LI1

LI2

LI3

GD3

S1 S2 S3

ACL4

ACL3

ACL2

ACL1

RED

WHT

BLK

BLU

RED

WHT

BLK

BLU

TB2

CN7

(WHT)

3 1

L3-OU

L3-A2

L2-OU

L2-A2

L1-OU

L1-A2

L1-A1

L1-IN

N-IN

CK-OU

X52CA

RED

BLK

BLU

RED

BLK

WHT

RED

WHT

BLK

YLW

ORN

BRN

BLK

RED

GRN/YLW

BLK

CONV. B.

BRN

INDOOR

UNIT

C. B.

TH6TH7

TH4TH3

21S4

t° t° t° t°

LEV-A

CNS

(WHT)

CNAC (WHT)

CNDC (PNK)

21S4 (GRN)

CN2

(WHT)

CN4

(WHT)

TH7/6 (RED)

TH3

(WHT)

TH4

(WHT)

TRANS

CNVMNT

(WHT)

CNMNT

(WHT)

CNM

(WHT)

LED1

LED2

X52

SV1 /CH

(GRY)

X54

63H

(YLW)

141221

311 5

114

3 1

12 34

31 31

LEV-A (WHT)

(WHT)

X51

MF1

CNF1

(WHT)

63L63H

63L

(RED)

TH34

t°

21 TH34

(RED)

63HS (WHT)

63HS

LEV-B

(RED)

LEV-B

MF2

CNF2 (WHT)

CN7

(WHT)

1312

CN6

(WHT)

CN5

(RED)

CN2

(WHT)

1712

CN4

(WHT)

TB-N

TB-U

TB-V

TB-W

TB-L3

TB-L2

TB-L1

TH8

t°

RED

CN3S

(WHT)

1 3

CNDM

(WHT)

CN51

(WHT)

1 3

CN52C

(RED)

MS 3~

BRN

CY1

CY2

SW7

SW6SW1

SW9

CN31

*1*

SW5SW8SW4SWP

1 MODEL SELECT

The black square ( ) indicates a switch position.

PUHZ-SW100YHA.UK PUHZ-SW120YHA.UK PUHZ-SW100YHA-BS.UK PUHZ-SW120YHA-BS.UK

OCH533

8 WIRING SPECIFICATIONS

FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model

SW75V SW100V SW120V SW100, 120Y

Outdoor unit power supply

~/N (single),

50 Hz, 230 V

~/N (single),

50 Hz, 230 V

~/N (single),

50 Hz, 230 V

3N~ (3 ph 4-wires),

50 Hz, 400 V

Outdoor unit input capacity Main switch (Breaker) *1 25 A 32 A 40 A 16 A

Wiring

Wire No. ×

size (mm

)

Outdoor unit power supply 3 × Min. 2.5 3 × Min. 4 3 × Min. 6 5 × Min. 1.5

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

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

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

Circuit rating

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

*4 AC 230 V AC 230 V AC 230 V AC 230 V

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

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

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

*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).

Make sure that the current leakage breaker is one compatible with higher harmonics. Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.

The use of an inadequate breaker can cause the incorrect operation of inverter. *2. Max. 45 m If 2.5 mm

used, Max. 50 m

If 2.5 mm

used and S3 separated, Max. 80 m *3. The 10 m wire is attached in the remote controller accessory. *4. The ﬁ gures are NOT always against the ground. S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.

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.

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

Power supply cables and the cables between Interface unit/Flow temp. controller and outdoor unit shall not be lighter than polychloroprene

sheathed ﬂ exible cables. (Design 60245 IEC 57

)

3. Be sure to connect the cables between

Interface unit/Flow temp. controller

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 insufﬁ cient 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.

5. Do not construct a system with a power supply that is turned ON and OFF frequently.

Outdoor Unit

3 poles isolator

Power supply

Isolator

Indoor unit (Interface unit / Flow temp. controller)

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

OCH533

9 REFRIGERANT SYSTEM DIAGRAM

unit : mm(inch)

Distributor

Thermistor TH7 (Ambient)

Heat exchanger

Refrigerant LIQUID pipe

connection :9.52(3/8)

Stop valve (with service port)

Strainer #100

Power receiver

Linear expansion valve B

Linear expansion valve A

Strainer #100

Thermistor TH6 (2-phase pipe)

Thermistor TH3 (Liquid)

High pressure switch 63H

Thermistor TH4 (Discharge)

Thermistor TH34 (Comp. surface)

Compressor

Strainer #50

Strainer #100

4-way valve

Charge plug

(Low pressure)

Charge plug (High pressure)

Stop valve

(with service port)

Refrigerant GAS pipe connection :15.88(5/8)

Pressure sensor 63HS

Distributor

Thermistor TH7 (Ambient)

Heat exchanger

Refrigerant GAS pipe connection ø15.88(5/8)

Refrigerant LIQUID pipe connection ø9.52(3/8)

Stop valve (with service port)

Strainer #100

Power receiver

Linear expansion valve B

Linear expansion valve A

Strainer #100

Thermistor TH6 (2-phase pipe)

Thermistor TH3 (Liquid)

Charge plug (Low pressure)

Charge plug (High pressure)

High pressure switch 63H

Thermistor TH4 (Discharge)

Thermistor TH34 (Comp. surface)

Compressor

Strainer #50

4-way valve

Strainer #100

Ball valve

Refrigerant flow in cooling Refrigerant flow in heating

Pressure sensor 63HS

Low pressure switch 63L

PUHZ-SW100VHA PUHZ-SW100VHA-BS PUHZ-SW100YHA PUHZ-SW100YHA-BS

PUHZ-SW75VHA.UK PUHZ-SW75VHA-BS.UK

PUHZ-SW120VHA PUHZ-SW120VHA-BS PUHZ-SW120YHA PUHZ-SW120YHA-BS

COMP H/P SW L/P SW REV/V Charge plug P-Sensor LEV-A LEV-B TH3 TH4 TH6 TH7 TH34

DC inverter twin rotary compressor (Mitsubishi Electric Corporation) For protection (OFF:4.15MPa) For protection (OFF:-0.03MPa) (SW100/120) Change the refrigerant circuit (Heating / Cooling) and for Defrosting High pressure / Low pressure / For production test use For calculation of the condensing temperature from high pressure Heating:Secondary LEV Cooling:Primary LEV Heating:Primary LEV Cooling:Secondary LEV Heating:Evaporating temperature Cooling:Sub cool liquid temperature For LEV control and for compressor protection Outdoor 2-phase pipe temperature For fan control and for compressor frequency control For compressor protection For accumulation of refrigerant

Compressor High pressure switch (63H) Low pressure switch (63L) Reversing (4-way) valve (21S4) Charge plug Pressure sensor (63HS) Linear expansion valve -A Linear expansion valve -B Liquid temperature thermistor Discharge temperature thermistor 2-phase pipe temperature thermistor Ambient temperature thermistor Comp.surface temperature thermistor Power Receiver

Symbol Part name

Detail

Power Receiver

OCH533

9-2. Unit replacement operation

When reusing the existing pipes that carried R22 refrigerant for the SW75/100/120 models, replacement operation must be performed before performing a test run.

1 If new pipes are used, these procedures are not necessary. 2 If existing pipes that carried R22 refrigerant are used for the SW75/100/120 models, these procedures are not necessary.

(The replacement operation cannot be performed.) 3 During replacement operation, “C5” is displayed on “A-Control Service Tool (PAC-SK52ST)”. (This is applied to only

SW75/100/120 models.)

9-1. Refrigerant collecting (pump down)

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 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.

* Start-up 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.

* In the case of multi-units control, before powering on, disconnect the wiring between the master indoor unit and the slave

indoor unit. For more details refer to the installation manual for the indoor unit.

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

(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit.

* Only set the SWP switch (push-button type) to ON if the unit is stopped. However, even if the unit is stopped and the

SWP switch is set to ON less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed. Wait until compressor has been stopped for 3 minutes and then set the SWP switch to ON again.

3 Because the unit automatically stops in about 2 to 3 minutes when the refrigerant collecting operation is completed (LED1

off, LED2 lit), be sure to quickly close the gas stop valve. If LED1 is lit and LED2 is off and the outdoor unit is stopped, refrigerant collection is not properly performed. Open the liquid stop valve completely, and then repeat step 2 after 3 minutes have passed.

* 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.

4 Turn off the power supply (circuit breaker). * Note that when the extension piping is very long with large refrigerant amount, it may not be possible to perform a pump-

down operation. When performing the pump-down operation, make sure that the low pressure is lowered to near 0 MPa (gauge).

Warning: When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it.

9-3. Start and finish of test run

• Operation from the indoor unit

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

• Operation from the outdoor unit

By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation

mode (cooling/heating) can be set up.

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

• There may be a faint knocking sound around the machine room after power is supplied, but this is

no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor

starts operating, but this is no problem with product because the check valve itself, generates the

sound because pressure difference is small in the refrigerant circuit.

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

OFF

<SW4>





 Stop  Operation  Cooling  Heating

OCH533

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

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

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

The trouble is reoccurring.

Displayed

Judge what is wrong and take a corrective action according to “10-3. Self-diagnosis action table”.

Not displayed

Conduct troubleshooting and ascertain the cause of the trouble.

The trouble is not reoccurring.

Logged

Consider the temporary defects such as the work of

protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Recheck the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, matters related to wiring and etc.

Reset error code logs and restart the unit after ﬁ nishing

service.

There is no abnormality in electrical component, controller

board, and etc.

Not logged

Re-check the abnormal symptom.

Conduct troubleshooting and ascertain the cause of the

trouble.

Continue to operate unit for the time being if the cause is

not ascertained.

There is no abnormality concerning of parts such as

electrical component, controller board, and etc.

10-2. CHECK POINT UNDER TEST RUN

Before test run

• After installation of outdoor unit, piping work and electric wiring work, re-check that there is no water leakage, loosened con-

nections and incorrect polarity.

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

and check that it is 1.0 M or over.

• Turn on power supply 12 hours before test run in order to protect compressor.

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

OCH533

10-3. SELF-DIAGNOSIS ACTION TABLE

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

Error Code

Abnormal point and detection method

Case

Judgment and action

None —

No voltage is supplied to terminal

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

turned off.

b) Contact failure or

disconnection of power supply terminal

c) Open phase (L or N phase)

2 Electric power is not charged

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

SW75VHA : Disconnection

of connector R or S SW100/120VHA : Disconnection of connector LI or NI

3 Electric power is not supplied

to outdoor controller circuit board. a) Disconnection of connector

(CNDC)

4 Disconnection of reactor (DCL

or ACL)

5 Disconnection of outdoor noise

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

As for SW75VHA, it is

especially needed to check the resistance RS on the noise filter circuit board.

6 Defective outdoor power circuit

board

7 Defective outdoor controller

circuit board

1 Check following items.

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

2 Check following items.

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

circuit board

SW75VHA: Check connection of the con-

nector R or S. Refer to 10-7.

SW100/120VHA :

Check connection of the

connector LI or NI. Refer to 10-7.

3 Check connection of the connector (CNDC)

on the outdoor controller circuit board.

Check connection of the connector, CNDC on

the outdoor power circuit board(V)/the noise filter(Y). Refer to 10-7.

4 Check connection of reactor. (DCL or ACL)

SW75VHA :

Check connection of “LO” and “NO”

on the outdoor noise filter circuit board. Check connection of "R" and "S" on the outdoor power circuit board.

Refer to 10-7.

SW100/120VHA : Check connection of

"DCL1" and "DCL2" on the outdoor power circuit board. Refer to 10-7.

5 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to 10-7.

6 Replace outdoor power circuit board.

7 Replace controller board (When items above

are checked but the units can not be repaired).

63H connector open

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

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller

circuit board

1 Check connection of 63H connector on

outdoor controller circuit board.

Refer to 10-7.

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.

63L connector open (SW100/120 only)

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

1 Disconnection or contact failure

of 63L connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63L

3 63L is working due to

refrigerant leakage or defective parts.

4 Defective outdoor controller

circuit board

1 Check connection of 63L connector on

outdoor controller circuit board.

Refer to 10-7.

2 Check the 63L side of connecting wire.

3 Check refrigerant pressure.

Charge additional refrigerant. Check continuity by tester. Replace the parts if the parts are defective. 4 Replace outdoor controller circuit board.

OCH533

Error Code

Abnormal point and detection method Judgment and action

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

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

Start-up time over

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

Case

1 Contact failure of indoor/

outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

7 2 or more outdoor units have

refrigerant address “0” .

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

supply or indoor/outdoor unit connecting wire.

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

4 Defective transmitting receiving

circuit of outdoor controller circuit board

5 Defective transmitting receiving

circuit of indoor controller board

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

refrigerant address “0” .

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

supply or indoor/outdoor unit connecting wire.

Indoor/outdoor unit connector miswiring, excessive number of units (4 units or more)

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

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

1 Check disconnection or looseness or polarity

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

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m (including wiring connecting each indoor unit

and between indoor and outdoor unit) Also check if the connection order of flat

cable is S1, S2, S3.

3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is

detected)

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

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

Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board) are

overlapping in case of group control system.

8 Check transmission path, and remove the

cause.

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

and EC.

1 Contact failure or miswiring of

indoor/outdoor unit connecting wire

2 Diameter or length of indoor/

outdoor unit connecting wire is out of specified capacity.

3 4 or more indoor units are

connected to one outdoor unit.

4 Defective transmitting receiving

circuit of outdoor controller circuit board

5 Defective transmitting receiving

circuit of indoor controller board

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

refrigerant address “0” .

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

supply or indoor / outdoor unit connecting wire.

2 connector open (SW100/120 only)

Abnormal if both 63H and 63L connector circuits are open for three minutes continuously after power supply.

63H: High-pressure switch 63L: Low-pressure switch

1 Disconnection or contact failure

of connector (63H,63L) on outdoor controller circuit board.

2 Disconnection or contact failure

of 63H, 63L

3 63H and 63L are working due

to defective parts.

4 Defective outdoor controller

board.

1 Check connection of connector (63H,63L) on

outdoor controller circuit board.

Refer to 10-7. 2 Check the 63H and 63L side of connecting

wire.

3 Check continuity by tester. Replace the parts if the parts are defective. 4 Replace outdoor controller circuit board.

Incorrect connection

The outdoor unit does not receive the signals of I/F or FTC.

1 A device other than Interface

unit or Flow temp. controller unit is connected to the unit.

1 Connect I/F or FTC to the unit.

OCH533

Error Code

Abnormal point and detection method

Judgment and action

High pressure (High-pressure switch 63H operated)

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

4.15 MPa

63H: High-pressure switch

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

dirt of indoor fan

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

valve (Not fully open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

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

defective inspection of outside temperature thermistor

(It detects lower temperature

than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller

board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving circuit

1~6Check indoor unit and repair defect.

7 Check if stop valve is fully open.

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

3 Check the detected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to 10-8.)

4~6 Turn the power off and check F5 is

displayed when the power is turned again.

When F5 is displayed, refer to “Judgment

and action” for F5.

7 Check linear expansion valve. Refer to 10-5. 8 Replace outdoor controller board.

Case

Open/short circuit of discharge temperature thermistor (TH4) / Comp. surface temperature thermistor (TH34)

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

1 Disconnection or contact failure

of connector (TH4/TH34) on the outdoor controller circuit board

2 Defective thermistor

3 Defective outdoor controller

circuit board

1 Check connection of connector (TH4/TH34)

on the outdoor controller circuit board.

Check breaking of the lead wire for thermistor (TH4/TH34). Refer to 10-7. 2 Check resistance value of thermistor (TH4/

TH34) or temperature by microprocessor.

(Thermistor/TH4/TH34: Refer to 10-5.) (SW2 on A-Control Service Tool: Refer to 10-8.) 3 Replace outdoor controller board.

High discharging temperature

(1) Abnormal if discharge temperature

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

Abnormal if discharge temperature

thermistor (TH4) exceeds 110: or more continuously for 30 seconds after 90 seconds have passed since the defrosting operation started.

(2) Abnormal if discharge superheat (Cooling: TH4 – T

63HS /

Heating: TH4 – T

63HS) exceeds 70:

continuously for 10 minutes.

High comp. surface temperature

Abnormal if comp. surface temperature (TH34) exceeds 125:.In the case of high comp. surface temperature error, compressor does not restart unless the thermistor (TH34) becomes less than 95:.

1 Overheated compressor

operation caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller

board

5 Defective action of linear

expansion valve

6 Clogging with foreign objects in

refrigerant circuit

w Clogging occur in the parts

which become below freezing point when water enters in refrigerant circuit.

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

2 Check if stop valve is fully open.

Turn the power off and check if U3 is displayed when the power is turned on again.

When U3 is displayed, refer to “Judgement

and action” for U3.

5 Check linear expansion valve. Refer to 10-5. 6 After recovering refrigerant, remove water

from entire refrigerant circuit under vacuum

more than 1 hour.

OCH533

Error Code

Abnormal point and detection method

Case

Judgment and action

Temperature of heatsink

Abnormal if heatsink thermistor (TH8) detects temperature indicated below. SW75V ········································ 79°C SW100V ········································ 94°C SW100Y ········································ 84°C SW120V ········································ 94°C SW120Y ········································ 84°C

1 The outdoor fan motor is

locked.

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

5 Defective thermistor

6 Defective input circuit of

outdoor power circuit board

Failure of outdoor fan drive circuit

12 Check outdoor fan.

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

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

5 Check resistance value of thermistor (TH8)

or temperature by microprocessor.

(Thermistor/TH8: Refer to 10-5.)

(SW2 on A-Control Service Tool: Refer to 10-8.)

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

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. * Check which unit has abnormality in

its thermistor by switching the mode of SW2. (PAC-SK52ST) (Refer to 10-8.)

* SW100/120V

Heatsink thermistor(TH8) is in the power module.

1 Check connection of connector (TH3, TH7/6)

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 10-7.

2 Check resistance value of thermistor (TH3,

TH6,TH7,TH8) or check temperature by microprocessor. (Thermistor/TH3,TH6,TH7,TH8: Refer to 10-5.) (SW2 on A-Control Service Tool: Refer to 10-8.)

3 Replace outdoor controller circuit board.

* Emergency operation is available in case of

abnormalities of TH3, TH6 and TH7.

1 Disconnection or contact failure

of connectors Outdoor controller circuit board

TH3, TH7/6

Outdoor power circuit board

CN3

2 Defective thermistor

3 Defective outdoor controller

circuit board

( )

Power module

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

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

converse of compressor wiring connection

4 Defective compressor 5 Defective outdoor power circuit

board

1 Open stop valve. 2 Check facility of power supply. 3 Correct the wiring (U

•V•

W phase) to compressor. Refer to 10-7 (Outdoor power circuit board).

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

Too low superheat due to low discharge temperature

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

1 Disconnection or loose

connection of discharge temperature thermistor (TH4)

2 Defective holder of discharge

temperature thermistor

Disconnection or loose connection of linear expansion valve’s coil

4 Disconnection or loose

connection of linear expansion valve’s connector

Defective linear expansion valve

12 Check the installation conditions of

discharge temperature thermistor (TH4).

3 Check the coil of linear expansion valve. Refer to 10-6. 4 Check the connection or contact of LEV-A and

LEV-B on outdoor controller circuit board.

5 Check linear expansion valve. Refer to 10-5.

Thermistors

Open detection Short detection

Symbol Name

TH3 Thermistor <Liquid> - 40 °C or below 90 °C or above TH6 Thermistor <2-phase pipe> - 40 °C or below 90 °C or above TH7 Thermistor <Amibient> - 40 °C or below 90 °C or above TH8 Thermistor <Heatsink> SW75VHA, SW100/120YHA - 27 °C or below 102 °C or above TH8 Internal thermistor

SW100/120VHA - 35 °C or below 170 °C or above

Outdoor fan motor

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

• 100 rpm or below detected continuously

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

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

1 Failure in the operation of the

DC fan motor

2 Failure in the outdoor circuit

controller board

1 Check or replace the DC fan motor.

2 Check the voltage of the outdoor circuit

controller board during operation.

3 Replace the outdoor circuit controller board.

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

OCH533

Error Code

Abnormal point and detection method

Case

Judgment and action

Detailed

codes

To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Refer to 10-8.

Overvoltage error

• Increase in DC bus voltage to SW75VHA: 420V SW100, 120VHA: 400V SW100, 120YHA: 760V

Abnormal increase in power source voltage

2 Disconnection of compressor wiring 3 Defective outdoor power circuit

board

Compressor has a ground fault.

Check the field facility for the power supply.

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

compressor. Refer to 10-7 (Outdoor power circuit board).

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

insulation. Replace compressor.

Undervoltage error

• Instantaneous decrease in DC bus voltage to SW75, 100, 120VHA: 200V SW100, 120YHA: 350V

1 Decrease in power source voltage,

instantaneous stop.

Disconnection or loose connection of CN52C on the outdoor power circuit board/controller circuit board (SW100, 120VHA)

Disconnection or loose connection of CN52C on the outdoor noise filter circuit board/controller circuit board (SW75VHA)

Defective converter drive circuit in outdoor power circuit board (SW·VHA)

Defective 52C drive circuit in outdoor power circuit board (SW100, 120V/YHA)

6 Defective 52C drive circuit in outdoor

noise filter circuit board (SW75)

7 Defective outdoor converter circuit

board (SW

YHA)

Disconnection or loose connection of rush current protect resistor RS (SW·YHA)

9 Defective rush current protect

resistor RS (SW

YHA)

0 Disconnection or loose connection

of main smoothing capacitor CB (SW100,120VHA)

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

SW100,120VHA

)

2 Power circuit failure on DC supply for

18V DC output on outdoor controller circuit board (SW100,120VHA).

Check the field facility for the power supply.

23 Check CN52C wiring. (SW·VHA)

4 Replace outdoor power circuit board.

(SW

VHA)

5 Replace outdoor power circuit board.

(SW

100,120

V/YHA)

6 Replace outdoor noise filter circuit

board. (SW

75V

HA)

7 Replace outdoor converter circuit

board. (SW

YHA)

8 Check RS wiring. (SW

YHA)

9 Replace RS. (SW

YHA)

0 Check CB wiring. (SW

100,120

VHA)

1 Check CN2 wiring. (SW

100,120

VHA)

2 Replace outdoor controller circuit

board. (SW

100,120

VHA)

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.

L1-phase open

(SW·YHA)

2 Disconnection or loose connection

between TB1 and outdoor noise filter circuit board (SW75VHA/SW100, 120YHA)

Disconnection or loose connection of CN5 on the outdoor power circuit board/ CNCT on the outdoor noise filter board (SW75VHA/SW100, 120YHA)

4 Defective ACCT (AC current trans)

on the outdoor noise filter circuit board (

SW75VHA/SW100, 120YHA

)

5 Defective input current detection

circuit in outdoor power circuit board

Defective outdoor controller circuit board

1 Check the field facility for the power

supply. (SW·YHA)

2 Check the wiring between TB1 and

outdoor noise filter circuit board. (SW75VHA/SW100, 120YHA)

3 Check CN5/CNCT wiring. (

SW75VHA/

SW100, 120YHA

)

4 Replace outdoor noise filter circuit

board. (SW

YHA)

5 Replace outdoor power circuit board.

6 Replace outdoor controller circuit board.

Abnormal power synchronous signal

• No input of power synchronous signal to power circuit board

• Power synchronous signal of 44 Hz or less, or 65 Hz or more is detected on power circuit board.

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

Defective power synchronous signal circuit in outdoor controller circuit board

5 Defective power synchronous signal

circuit in outdoor power circuit board

1 Check the field facility for the power

supply.

2 Check earth wiring.

3 Check CN2 wiring.

4 Replace outdoor controller circuit board.

5 Replace outdoor power circuit board.

OCH533

Error Code

Abnormal point and detection method Judgment and action

Case

Compressor overcurrent interruption (When compressor locked)

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

1 Stop valve is closed. 2 Decrease of power supply

voltage

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective compressor

5 Defective outdoor power board

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

3 Correct the wiring (U

•V• W phase) to

compressor.

Refer to 10-7 (Outdoor power circuit board). 4 Check compressor. Refer to 10-5. 5 Replace outdoor power circuit board.

Overheat protection

Abnormal if liquid thermistor (TH3), condensing temperature T

63HS detects 70:

or more during compressor operation.

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

2 Defective liquid thermistor

(TH3), condensing temperature T

63HS

Defective outdoor controller board

1 Check outdoor unit air passage.

23 Turn the power off and on again to check

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

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 Disconnection or contact

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

2 Defective pressure sensor 3 Defective outdoor controller

circuit board

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 10-8.)

3 Replace outdoor controller board.

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.)

• Abnormal if 40A (SW100/120V) of input current is detected or 37A (SW100/120V) or more of input current is detected for 10 seconds continuously.

1 Disconnection of compressor

wiring

2 Defective circuit of current

sensor on outdoor power circuit board

3 Decrease of power supply

voltage

1 Correct the wiring (U• V• W phase) to

compressor. Refer to 10-7 (Outdoor power circuit board).

2 Replace outdoor power circuit board.

3 Check the facility of power supply.

Low pressure (63L operated) (SW100/120 only)

Abnormal if 63L is operated (under

-0.03MPa) during compressor operation.

63L: Low-pressure switch

1 Stop valve of outdoor unit is

closed during operation.

2 Disconnection or loose

connection of connector (63L) on outdoor controller board

3 Disconnection or loose

connection of 63L

4 Defective outdoor controller

board

5 Leakage or shortage of

refrigerant

6 Malfunction of linear expansion

valve

1 Check stop valve.

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

if F3 is displayed on restarting. If F3 is displayed, follow the F3 processing direction.

5 Correct to proper amount of refrigerant.

6 Check linear expansion valve.

Refer to 10-5.

PFC error (Overvoltage/ Undervoltage/Overcurrent)

• PFC detected any of the followings

a) Increase of DC bus voltage

to 420V.

b) Decrease in PFC control

voltage to 12V DC or lower

c) Increase in input current to

50A peak

(SW75VHA only)

Abnormal increase in power source voltage

2 Decrease in power source

voltage, instantaneous stop

3 Disconnection of compressor

wiring

4 Misconnection of reactor (ACL) 5

Defective outdoor power circuit board

Defective reactor (ACL)

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

PFC/IGBT error (Undervoltage)

•

When Compressor is running,

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

(SW·VHA only)

Incorrect switch settings on the outdoor controller circuit board for model select

Defective outdoor power circuit board

Defective outdoor controller circuit board

1 Correction of a model select

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

12 Check the field facility for the power

supply.

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

compressor. Refer to 10-7 (Outdoor power circuit board).

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

Detailed

codes

OCH533

Error Code

Abnormal point and detection method Judgment and action

Case

Remote controller control board

1 Abnormal if data cannot be normally

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

(Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be normally operated.

(Error code: E2)

1 Defective remote controller

1 Replace remote controller.

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.

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

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

1 Abnormal if indoor controller board can

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

2 Indoor controller board cannot receive

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

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main” if

there is no problem with the action above.

3 Check wiring of remote controller.

• Total wiring length: Max. 500m (Do not use cable o 3 or more.)

• The number of connecting indoor units: Max. 16 units

• The number of connecting remote controller: Max. 2 units

When it is not the above-mentioned problem of

1~3 4 Diagnose remote controllers.

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 "RCE3" or "ERC00-66" is displayed,

noise may be causing abnormality. * If the unit is not normal after replacing

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

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.

Compressor overcurrent interruption

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

1 Stop valve of outdoor unit is

closed.

2 Decrease of power supply

voltage

3 Looseness, disconnection or

converse of compressor wiring connection

4 Defective fan of indoor/outdoor

units

5 Short cycle of indoor/outdoor

units

6 Defective input circuit of

outdoor controller board

7 Defective compressor 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.

Correct the wiring (U•V •W phase) to compressor. Refer to 10-7 (Outdoor power circuit board).

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

W Before the replacement of the outdoor

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

7 Check compressor. Refer to 10-5. 8 Replace outdoor power circuit board. 9 Check the dip switch setting of outdoor

controller circuit board.

OCH533

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

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

2 Abnormal if outdoor controller

circuit board could not find blank of transmission path for 3 minutes.

1 Indoor/ outdoor unit connecting

wire has contact failure.

2 Defective communication circuit

of outdoor controller circuit board

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

outdoor unit connecting wire.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire.

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

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

Non defined error code

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

1 Noise has entered transmission

wire of remote controller.

2 Noise has entered indoor/

outdoor unit connecting wire.

3 Outdoor unit is not inverter

models.

4 Model name of remote

controller is PAR-S25A.

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

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

3 Replace outdoor unit with inverter type

outdoor unit.

4 Replace remote controller with MA remote

controller.

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

Abnormal if outdoor controller circuit board could not receive anything normally for 3 minutes.

1 Contact failure of indoor/

outdoor unit connecting wire

2 Defective communication circuit

of outdoor controller circuit board

3 Defective communication circuit

of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor or outdoor units.

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

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

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

1 Abnormal if remote controller could not

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

2 Remote controller receives transmitted

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

1 Abnormal if indoor controller board could

not find blank of transmission path. (Error code: E5)

2 Indoor controller board receives

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

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting.

4~6 Diagnose remote controller.

a) When “RC OK” is displayed, remote

controllers have no problem. Turn the power off, and on again to check. When becoming abnormal again, replace indoor controller board.

b) When “RC NG” is displayed, replace

remote controller.

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

1 2 remote controller are set as

“main.”

(In case of 2 remote controllers)

2 Remote controller is connected

with 2 indoor units or more.

3 Repetition of refrigerant

address

4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiving

circuit of indoor controller board

6 Noise has entered into

transmission wire of remote controller.

* Check LED display on the outdoor controller

circuit board. (Connect A-control service tool, PAC-SK52ST.)

Check disconnection or looseness of

Interface unit/Flow temp. controller or outdoor unit connecting wire of Interface unit/Flow temp. controller or outdoor unit.

2~4

Turn the power off, and on again to check. If abnormality generates again, replace Interface unit/Flow temp. controller or outdoor controller circuit board.

Interface unit/Flow temp. controller or outdoor unit communication error (Signal receiving error)

Abnormal if Interface unit/Flow temp.

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

Abnormal if Interface unit/Flow temp.

controller cannot receive any signal normally for 3 minutes.

Contact failure, short circuit

or, miswiring (converse wiring) of Interface unit/Flow temp. controller or outdoor unit connecting wire

Defective transmitting receiving

circuit of outdoor controller circuit board

Defective transmitting receiving

circuit of Interface unit/Flow temp. controller

Noise has entered into Interface

unit/Flow temp. controller or outdoor unit connecting wire.

Error Code Abnormal point and detection method Judgment and action

Case

Serial communication error

Abnormal if serial co

mmunication between outdoor controller circuit board and outdoor power circuit board is d

efective.

1 Breaking of wire or contact

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

2 Breaking of wire or contact

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

3 Defective communication circuit

of outdoor power circuit board

4 Defective communication circuit

of outdoor controller circuit board for outdoor power circuit board

12 Check connection of each connector CN2

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

3 Replace outdoor power circuit board.

4 Replace outdoor controller circuit board.

OCH533

Error Code Abnormal point and detection method Judgment and action

Case

10-4. TROUBLESHOOTING

Phenomena

Factor Countermeasure

1. Remote controller display does not work.

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

1 At longest 2 minutes after the power supply “PLEASE

WAIT” is displayed to start up.

2 Communication error between the remote controller

and indoor unit

3 Communication error between the indoor and outdoor

unit

4 Outdoor unit protection device connector is open.

1 DC12V is not supplied to remote controller.

(Power supply display

is not indicated on LCD.)

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

no display is indicated.

• “PLEASE WAIT” is not displayed.

• “PLEASE WAIT” is displayed.

1 Check LED2 on indoor controller board.

(1) When LED2 is lit.

Check the remote controller wiring for breaking or contact failure.

(2) When LED2 is blinking.

Check short circuit of remote controller wiring.

(3) When LED2 is not lit.

Refer to No.3 below.

2 Check the following.

• Failure of remote controller if “PLEASE

WAIT” is not displayed

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

is displayed.

1 Normal operation 2 Self-diagnosis of remote controller 3

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

(1) When LED3 is not blinking.

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

(2) When LED3 is blinking.

Indoor/outdoor connecting wire is normal.

4 Check LED display on outdoor controller

circuit board. Refer to 10-8. Check protection device connector (63L and 63H) for contact failure. Refer to 10-7.

Freezing/overheating protection is working

Overheating protection <Heating mode>

Abnormal if condensing temperature of pressure sensor (63HS) detects Tcond. °C or more and compressor operation frequency is less than or equal to 25 Hz. Detection is inoperative during defrosting.

1 Overcharge of refrigerant 2

Defective refrigerant circuit (clogs)

Malfunction of linear expansion valve

4 Reduced water flow

· Clogged filter

· Leakage of water

5 High temperature

· Over-load

· Inlet water is too warm.

6 Defective water pump

12 Check operating condition of refrigerant

circuit.

3 Check linear expansion valve.

45 Check water piping. 6 Check water pump.

Ambient temperatur

stage-g

stage-f

stage-e

stage-d

stage-c

stage-b

stage-a

Tcond

stage-a stage-b stage-c stage-d stage-e stage-f stage-g

-18 -17 -15 -14 -12 -11 -9 -8 -6 -5 -3 -2

63 62 61 60 59 57 51

Tcond SW75

SW100/120

63 61 60 58 56 53 50

1–3

Check resistance value of thermistor.

0: 15.0k" 10: 9.6k" 20: 6.3k"

If you put force on (draw or bend) the lead wire with measuring resistance value of thermistor, breaking of wire or contact failure can be detected.

Check contact failure of TB61 No.5-6 on PCB of Interface unit/Flow temp. controller. Refer to 7. WIRING DIAGRAM. Turn the power on again and check restart after inserting connector again.

Check actual tank temperature display on

remote controller.

Replace PCB of Interface unit/Flow temp.

controller if there is abnormal difference with

actual tank temperature. Turn the power off, and on again to operate after check.

Defective thermistor character-

istics

Contact failure of TB61 No. 5-6

on PCB of interface unit/Flow temp. controller

Breaking of wire or contact

failure of thermistor wiring

Defective PCB of interface

unit/Flow temp. controller

Actual tank temperature thermistor (TH5)

The unit is 3-minute resume preven-

tion mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally)

Constantly detected during cooling,

heating, heating ECO, anti freeze and hot water operation.

30: 4.3k

40: 3.0k"

OCH533

Factor

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

1 After cancelling to select function from the remote

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

1 Normal operation

Phenomena

Countermeasure

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

1Linear expansion valve fault

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

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

1• Discharging temperature and indoor heat

exchanger temperature does not rise.

Inspect the failure by checking discharg-

ing pressure.

• Replace linear expansion valve.

2• If refrigerant leaks, discharging tempera

ture rises and LEV opening increases.

Inspect leakage by checking the tem-

perature and opening.

• Check pipe connections for gas leakage.

3Check the insulation. 4Open intake grille and check the filter.

Clean the filter by removing dirt or dust on it.

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

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

• Clean the heat exchanger.

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

8. 1For 3 minutes after temperature

adjuster turns off, the compressor will not start operating even if temperature adjuster is turned on.

2For 3 minutes after temperature

adjuster turns on, the compressor will not stop operating even if temperature adjuster is turned off.

(Compressor stops operating

immediately when turning off by the remote controller.)

12Normal operation (For protection of compressor)

12Normal operation

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

1The pair number settings of the wireless remote controller and indoor controller board are mismatched.

1Check the pair number settings.

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

1No operation for 2 minutes at most after the power

supply ON.

2Local remote controller operation is prohibited.

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

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

3Phenomena of No.2.

1Normal operation

2Normal operation

3Check the phenomena No.2.

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

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

1• If refrigerant leaks, discharging tempera-

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

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

Clean the filter by removing dirt or dust on it.

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

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

• Clean the heat exchanger. 4Remove the blockage.

OCH533

Phenomena Countermeasure

A ﬂ owing water sound or occasional hissing sound is heard.



These sounds can be heard when refrigerant and/or water is (are) ﬂ owing in the in-

door unit or refrigerant pipe, or when the refrigerant and/or water is (are) chugging.

Water does not heat or cool well.



Clean the ﬁ lter of water piping. (Flow is reduced when the ﬁ lter is dirty or clogged.)



Check the temperature adjustment and adjust the set temperature.



Make sure that there is plenty of space around the outdoor unit.

Water or vapour is emitted from the outdoor unit.



During cooling mode, water may form and drip from the cool pipes and joints.



During heating mode, water may form and drip from the heat exchanger of

outdoor unit.



During defrosting mode, water on the heat exchanger of outdoor unit evapo-

rates and water vapour may be emitted.

The operation indicator does not appear in the remote controller display.



Turn on the power switch. “

” will appear in the remote controller display.

“ ” appears in the remote controller display.



During external signal control, “

” appears in the remote controller display

and FTC operation cannot be started or stopped using the remote controller.

When restarting the outdoor unit soon after stopping it, it does not operate even though the ON/OFF button is pressed.



Wait approximately 3 minutes. (Operation has stopped to protect the outdoor

unit.)

FTC operates without the ON/OFF button being pressed. Is the on timer set?

Press the ON/OFF button to stop operation. 

Is the FTC connected to a external signal? Consult the concerned people who control the FTC. 

Does “

” appear in the remote controller display? Consult the concerned people who control the FTC. 

Has the auto recovery feature from power failures been set?

Press the ON/OFF button to stop operation.

FTC stops without the ON/OFF button being pressed.



Is the off timer set? Press the ON/OFF button to restart operation. 

Is the air conditioner connected to a central remote controller? Consult the concerned people who control the FTC. 

Does “ ” appear in the remote controller display?

Consult the concerned people who control the FTC.

Remote controller timer operation cannot be set.



Are timer settings invalid?

If the timer can be set,

WEEKLY

SIMPLE

, or

AUTO OFF

appears in the

remote controller display.

“PLEASE WAIT” appears in the remote controller display. The initial settings are being performed. Wait approximately 3 minutes.



If the remote controller is not only for FTC, change it.

An error code appears in the remote controller display.



The protection devices have operated to protect the FTC and outdoor unit. 

Do not attempt to repair this equipment by yourself.

Turn off the power switch immediately and consult your dealer. Be sure to provide the dealer with the model name and information that appeared in the remote controller display.

•

If the unit cannot be operated properly after test run, refer to the following table to find the cause.

Symptom

Cause

Wired remote controller LED 1, 2 (PCB in outdoor unit)

PLEASE WAIT

PLEASE WAIT  Error code

Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).

For about 2 minutes after power-on

Subsequent to about 2 minutes after power-on

After LED 1, 2 are lighted, LED 2 is

turned off, then only LED 1 is

Only LED 1 is lighted. 

LED 1, 2 blink.

Only LED 1 is lighted.



LED 1 blinks twice, LED 2 blinks once.

•

For about 2 minutes following power-on,operation of the remote controller is not possible due to system start-up. (Correct operation)

•Connector for the outdoor unit’s protection device is not connected.

•Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, L3)

•Incorrect wiring between FTC and outdoor (incorrect polarity of S1, S2, S3)

•Remote controller wire short

Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the FTC, refer to the following table.

LED1 (power for microprocessor) Indicates whether control power is supplied. Make sure that this LED is always lit. LED2 (power for remote controller) Indicates whether power is supplied to the remote controller.

This LED lights only in the case of the FTC which is connected to the outdoor unit refrigerant addresses “0”.

LED3 (communication between FTC and outdoor units) Indicates state of communication between the FTC and outdoor units.

Make sure that this LED is always blinking.

lighted.

(Correct operation)

OCH533

How long is “PLEASE WAIT”

kept being displayed on the

remote controller?

6 minutes or more

2 minutes or less

2 to 6 minutes

YES

Are any error codes

displayed on the

remote controller?

Are any error codes

displayed on the LED?

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

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

•

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

diagnosis after turning

on the main power.

• Normal. The start-up diagnosis will

be over in around 2 minutes.

• Miswiring of indoor/ outdoor connecting wire

• Breaking of indoor/ outdoor connecting wire (S3)

• Defective indoor controller board

• Defective outdoor controller circuit board

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

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

• Defective indoor controller board

• Defective remote controller

Check the LED display of the outdoor controller circuit board.

Diagnosis flow Cause

Inspection method and troubleshooting

OCH533

AC 198V to AC 264V?

DC 12V to DC 16V?

YES

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

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

Check the voltage of indoor controller board (CN2D).

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

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

•

Troubles concerning

power supply.

• Check the power wiring to the outdoor unit.

• Check the breaker.

• Bad wiring of the outdoor controller board.

• The fuses on the outdoor controller circuit board are 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.

• Defective indoor power board

• Replace the indoor

power board.

• Defective indoor controller board

• Replace the indoor

controller board.

• Miswiring, breaking or poor connection of in door/outdoor connecting wire

•

Check if there is miswiring

or breaking of wire.

Symptoms: Nothing is displayed on the remote controller 

Diagnosis flow Cause

Inspection method and troubleshooting

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

OCH533

AC 198V to AC 264V?

Are there looseness or

disconnection of the indoor/

outdoor connecting wire?

Is anything displayed?

DC 17V to DC 28V?

Is “E8” displayed?

Can all the indoor

unit be operated?

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

YES

Not lighting.

Blinking.

YES

Not displayed.

Displayed.

YES

Check the voltage between S1 and

S2 on the terminal block (TB4)

of the

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

outdoor unit.

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

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

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

Can the unit be restarted?

•

Breaking or poor contact of the indoor/outdoor connecting wire

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

connecting wire.

• Defective outdoor controller circuit board

• Replace the outdoor

controller circuit board.

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

• Set the refrigerant

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

• Defective indoor power board

• Replace the indoor

power board.

• Defective outdoor power circuit board

• Replace the outdoor

power circuit board.

• Defective indoor controller board

•

Replace the indoor controller

board of the indoor unit which

doesn’t operate.

• Defective outdoor controller circuit board

• Replace the outdoor

controller circuit board.

• Influence of electromagnetic noise

• Not abnormal. There may be the influence

of electromagnetic noise.

Check the transmission wire

and get rid of the causes.

Symptoms: Nothing is displayed on the remote controller 

Diagnosis flow Cause

Inspection method and troubleshooting

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

Check the status of the indoor controller board LED3 display.

Is the refrigerant address “0”?

YES

Is “EA” or “Eb” displayed?

OCH533

DC 10V to DC 16V?

YES

Lighting

Blinking

Lighting

Blinking

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

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

• Defective remote controller

• Replace the remote controller.

• Breaking or poor contact of the remote controller wire

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

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

• The remote controller wire short-circuits

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

• Defective indoor controller board

• Replace the indoor controller board.

Diagnosis flow Cause

Inspection method and troubleshooting

Symptoms: Nothing is displayed on the remote controller 

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

Check the status of the LED2.

OCH533



The operating display of remote

controller does not come on.

Phone Calls From Customers How to Respond Note

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

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

 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.  Error code appears and blinks

on the display of remote controller.

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

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

 Error code will be displayed if any protection

devices of the air conditioner are actuated.

What is error code?



“PLEASE WAIT” is displayed

on the screen.

 Wait around 2 minutes.

An automatic startup test will be conducted for

2 minutes when power is supplied to the air

conditioner. “PLEASE WAIT” will be kept being

displayed while that time.



“FILTER” is displayed on the

screen.

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

Clean the air filters. Press the FILTER button on

the remote controller twice to clear “FILTER” from

the display.

See the operation manual that came with the

product for how to clean the filters.



“STANDBY” is displayed on the

screen.

 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.



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

 The outdoor unit gets frosted when the outside temperature is low and the humidity is high. “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.

Unit does not operate at all.

Remote controller

• Before repair Frequent calling from customers

OCH533

Phone Calls From Customers How to Respond Note

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

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

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

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



An gas escaping sound is heard

sometimes.

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



A cracking sound is heard

sometimes.

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



A buzzing sound is heard

sometimes.

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



A ticking sound is heard from

the outdoor unit sometimes.

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



A sound, similar to water

flowing, is heard from the unit.

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



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

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

 This is not a malfunction.

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

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

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

Sound comes out from the air conditioner.



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

 This is not a malfunction. During the DRY operation, the blower’s ON/OFF is controlled by the microcomputer to prevent overcooling and to ensure efficient

dehumidification. The fan speed cannot be set by the remote controller during DRY operation.

Something is wrong with the blower…..

The room cannot be cooled or heated sufficiently.

OCH533



Air blows out for a while after

HEAT operation is stopped.

Phone Calls From Customers How to Respond Note

 This is not a malfunction. The blower is operating just for cooling down the heated-up air conditioner. This will be done within 1 minute. This control is conducted only when the HEAT operation is stopped with the electric heater ON.

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

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



The airflow direction is changed

during COOL operation.

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



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

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

1) At the beginning of the HEAT operation

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

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



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

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

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

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

Something is wrong with the blower…..

Something is wrong with the airflow direction….

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

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

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

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

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

There might be a case that “CENTRALLY CONTROLLED INDICATOR

” will not be

displayed.

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

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



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

OCH533

Phone Calls From Customers How to Respond Note

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

A white mist is expelled from the indoor unit.

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

Water or moisture is expelled from the outdoor unit.

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

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

10-5. HOW TO CHECK THE PARTS PUHZ-SW75VHA(-BS).UK

PUHZ-SW100VHA(-BS).UK PUHZ-SW120VHA(-BS).UK PUHZ-SW100YHA(-BS).UK PUHZ-SW120YHA(-BS).UK

1 2 3 4 5

Gray

Orange Red Yellow Black

Parts name

Check points

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

Thermistor (TH3) <Liquid>

Thermistor (TH4) <Discharge>

Thermistor (TH6) <2-phase pipe>

Thermistor (TH7) <Ambient>

Thermistor (TH8) <Heatsink>

Thermistor (TH34) <Comp. surface>

160k - 410k

4.3k - 9.6k

TH4

TH34

TH3 TH6 TH7 TH8

Abnormal

Open or short

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



)

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

Motor for compressor (MC)

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

Normal

Abnormal

Open or short

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

Normal

Gray - Black Gray - Red

Gray - Yellow

Gray - Orange

Abnormal

46$3

Open or short

Refer to next page.Fan motor

(MF1,MF2)

SW100/120YSW100/120V

0.19  0.30 

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



)

Normal

Abnormal

Open or short

1435$150

SW75V

0.88 

Normal

39k - 105k

OCH533

Mitsubishi PUHZ-SW120YHA.UK, PUHZ-SW100VHA.UK, PUHZ-SW75VHA-BS.UK, PUHZ-SW100VHA-BS.UK, PUHZ-SW100YHA-BS.UK Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual