Mitsubishi OB379D Service Manual

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Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

HFC

utilized

R410A

OUTDOOR UNIT

SERVICE MANUAL

Wireless type Models

Revision D:

•PARTS LIST and RoHS PARTS LIST have been changed.

Please void OB379 REVISED EDITION-C.

No. OB379

REVISED EDITION-D

MUZ-GA25VA MUZ-GA25VA MUZ-GA25VA MUZ-GA25VA MUZ-GA35VA MUZ-GA35VA -

MUZ-GA25VAH MUZ-GA25VAH -

MUZ-GA35VAH MUZ-GA35VAH -

E2 E3 E4

Indoor unit service manual

MSZ-GA•VA Series (OB378) MSZ-CB•VA Series (OB441)

CONTENTS

1. TECHNICAL CHANGES ····································3

2. PART NAMES AND FUNCTIONS······················7

3. SPECIFICATION·················································8

4. NOISE CRITERIA CURVES·····························10

5. OUTLINES AND DIMENSIONS························11

6. WIRING DIAGRAM ··········································12

7. REFRIGERANT SYSTEM DIAGRAM··············20

8. PERFORMANCE CURVES······························23

9. ACTUA TOR CONTROL····································31

10. SERVICE FUNCTIONS·····································32

11. TROUBLESHOOTING ······································32

12. DISASSEMBLY INSTRUCTIONS·····················53

13. PARTS LIST······················································56

14. RoHS PARTS LIST···········································60

NOTE:

RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the RoHS Parts List.

Page 2

Revision A:

Model 6. Wiring diagram

11-6.N Check of inverter P.C.board

Change Change

MUZ-GA25VA MUZ-GA25VAH MUZ-GA35VA MUZ-GA35VAH

No change No change

•Alternative inverter P.C.board has been added(Refer to 11-7.1. Inverter P.C.board (Alternative)). FUSE F901 has been

equipped to MUZ-GA35.

• model has been added.

Quick clean kit has been removed.

Revision B:

•MUZ-GA25VA(H)- has been added.

•11-2. Failure mode recall function has been changed.

•RoHS PARTS LIST has been added.

Revision C:

•MUZ-GA25VA(H)- has been added.

•Solenoid valve coil has been removed.

(MUZ-GA25VA- :Serial No. 6021351T~ , MUZ-GA25VAH- :Serial No. 7000001T~)

E3E3

Revision D:

•PARTS LIST and RoHS PARTS LIST have been changed.

Page 3

TECHNICAL CHANGES

MUZ-A09YV - ➔ MUZ-GA25VA MUZ-A09YVH - ➔ MUZ-GA25VAH -

1.Indication of capacity has been changed.(BTU base ➔ kW base)

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Terminal block for power supply has been added.

5.Power P.C. board has been changed.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

• Compressor has been changed.(KNB073FBVH➔KNB065FDTH)

• LEV has been removed and capillary tube has been added.

• Bypass circuit for low outside temperature operation has been added.

• Specification and position of muffler have been changed.

• Path of outdoor heat exchanger has been changed.

• 4-way valve and R.V. coil have been changed.

• Stop valve has been changed.

8.Fan motor has been changed. (AC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

MUZ-A12YV - ➔ MUZ-GA35VA MUZ-A12YVH - ➔ MUZ-GA35VAH -

E1E1

1.Indication of capacity has been changed.(BTU base ➔ kW base)

2.Control method between indoor and outdoor unit has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Terminal block for power supply has been added.

5.Power P.C. board has been changed.

6.Inverter P.C. board has been changed.

7.Refrigerant circuit has been changed.

• Compressor has been changed.(KNB092FAAH➔KNB073FDVH)

• Specification and position of muffler have been changed.

• Path of outdoor heat exchanger has been changed.

• 4-way valve and R.V. coil have been changed.

• Stop valve has been changed.

8.Fan motor has been changed.(AC➔DC)

9.Shape of grille has been changed.

10.Shape of service panel has been changed.

11.Shape of propeller has been changed.

12.Quick Clean Kit has been added.

13.Symbol on terminal block has been changed (to S1/S2/S3).

MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH MUZ-GA35VA - ➔ MUZ-GA35VA MUZ-GA35VAH - ➔ MUZ-GA35VAH -

1.Quick clean kit has been removed.

MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH -

1.Capillary tube for heating has been added.

2.Solenoid valve coil has been removed.(GA25VA- :Serial No. 6021351T~ , GA25VAH- :Serial No. 7000001T~)

E2E1

E3E2

E3E3

MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH -

1.Refrigerant circuit has been changed.

2.Solenoid valve coil has been removed.

E4E3

Page 4

Refrigeration

oil

Refrigerant

New refrigerant

R410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557 64

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

86.5

-40.8

0.94

44.4

Non combustible

0.055 1700

Gas phase

Possible

Compatible oil

Light yellow

Non

Refrigerant Composition (Ratio) Refrigerant handling Chlorine Safety group (ASHRAE) Molecular weight Boiling point (:) Steam pressure [25:](Mpa) Saturated steam density [25:](Kg/K) Combustibility ODP w1 GWP w2 Refrigerant charge method Additional charge on leakage Kind Color Smell

w1:Ozone Depletion Potential : based on CFC-11 w2 :Global Warming Potential : based on CO

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

New Specification Current Specification

The incompatible refrigeration oil easily separates from refrigerant and is in the upper layer inside the suction muffler. Raising position of the oil back hole enables to back the refrigeration oil of the upper layer to flow back to the compressor.

Since refrigerant and refrigeration oil are compatible, refrigeration oil goes back to the compressor through the lower position oil back hole.

Compressor

Suction muffler

Oil back hole

Refrigeration oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigeration oil /Refrigerant

Compressor

• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.

• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air

conditioners.

1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/

materials are required. Refer to the table below.

2 Take sufficient care not to allow water and other contaminations to enter the R410Arefrigerant during storage and

installation, since it is more susceptible to contaminations than R22.

3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant

piping.)

4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])

Page 5

Conversion chart of refrigerant temperature and pressure

R410A tools

Can R22 tools be used?

Gas leak detector

R410A has high pressures beyond the measurement range of existing gauges. Port diameters have been changed to prevent any other refrigerant from being charged into the unit.

Hose material and cap size have been changed to improve the pressure resistance.

Dedicated for HFC refrigerant.

6.35 mm and 9.52 mm

Description

Clamp bar hole has been enlarged to reinforce the spring strength in the tool. Provided for flaring work (to be used with R22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use vacuum pumps.

It is difficult to measure R410A with a charging cylinder because the refrigerant bubbles due to high pressure and high-speed vaporization

Yes

New

Gauge manifold

Charge hose

Torque wrench

Flare tool Flare gauge

Vacuum pump adapter

Electronic scale for refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

No 12.7 mm

Wall thickness

Outside diameter

Pipe

For liquid For gas

6.35

9.52

12.7

0.8 mm

Heat resisting foam plastic Specific gravity 0.045 Thickness 8 mm

Insulation material

(MPa [Gauge])

4.0

3.5

3.0

2.5

2.0

1.5

R410A R22

NOTE : The unit of pressure has been changed to MPa on the

international system of units(SI unit system).

1.0

0.5

Saturated liquid pressure

0.0

-0.5

-30 -20 -10 0 10 20

40 50 60

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])

(:)

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools. The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.

2.Refrigerant piping

1 Specifications

Use the refrigerant pipes that meet the following specifications.

• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient.

Page 6

Electronic scale for refrigerant charging

Outdoor unit

Refrigerant gas cylinder operating valve

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Service port

Gauge manifold valve (for R410A)

Union

Liquid pipe Gas pipe

Stop valve

Indoor unit

Charge hose (for R410A)

R410A

Pipe diameter

6.35

9.52

12.7

17 22 26

Dimension of flare nut

R22

17 22 24

2 Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe. For details of flaring work, refer to Installation manual “FLARING WORK”.

3.Refrigeration oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

• Do not discharge the refrigerant into the atmosphere. Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant

circuit.

• Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder. If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, capacity of the refrigeration cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

Page 7

PART NAMES AND FUNCTIONS

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

ACCESSORIES

Drain socket

Quick clean kit

MUZ-GA25VA MUZ-GA35VA -

1 1

MUZ-GA25VAH -

MUZ-GA35VAH -

MUZ-GA25VA -

MUZ-GA25VA MUZ-GA35VA -

–

––

MUZ-GA25VAH -

MUZ-GA35VAH -

–

E2 E3 E4 E2

Page 8

SPECIFICATION

Outdoor model

Function

Power supply

A W %

kg cc

2.5 (0.9-3.0)

U-V 1.88

Capacity Rated frequency(Min.-Max.) Dehumidification Air flow ✽1

Capacity

Power outlet Running current ✽1 Power input ✽1 Power factor ✽1 Starting current ✽1

Electrical

data

Compressor motor current ✽1 Fan motor current ✽1

Coefficient of performance(C.O.P)

Model Output Winding resistance(at 20:)

Compressor

Model Winding

Fan

motor

resistance(at 20:) Dimensions WOHOD

Weight Sound level ✽1 Fan speed(High/Low, High/Med./Low) Fan speed regulator Refrigerant filling

Special

remarks

capacity(R410A) Refrigeration oil (Model)

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:

Outdoor Dry-bulb temperature 35:Wet-bulb temperature(24:)

Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:

Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6: Refrigerant piping length (one way): 5m ✽1 Measured under rated operating frequency

r/h

K /h

✽1

dB(A)

rpm

MUZ-GA25VA MUZ-GA25VAH

Cooling

Single phase

230V,50Hz

1.4 1,890

2.95 607

3.6

2.71

0.24

3.91

KNB065FDTH

500

V-W 1.88

RA6V21-AB

WHT-BLK 347 BLK-RED 281

800o550o285

31 46

810

0.85

320 (NEO22)

Heating

3.2 (0.9-4.5)

—

3.35 727

3.11

4.21

U-W 1.88

MUZ-GA35VA MUZ-GA35VAH

Cooling

Single phase

230V,50Hz

3.5 (1.0-3.9)

2.0

2,058

4.75

1,047

4.44

0.31

3.24 KNB073FDVH

U-V 1.53

V-W 1.53

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

800o550o285

810/750

320 (NEO22)

Heating

4.0 (0.9-5.0)

2,178

4.55

1,022

5.0

4.20

0.35

3.79

550

U-W 1.53

880/810/650

0.90

—

Page 9

Specifications and rating conditions of main electric parts

Item

Model

Current transformer Current transformer Smoothing capacitor Diode module

(CT761, CT781) (

C63A, C63B, C63C

(DB61, DB65) Fuse Fuse Fuse

(CT)

(F61)

(F71, F801)

( F901 w1) Defrost heater Intelligent power module Expansion valve coil Reactor Current-detecting resistor Current-detecting resistor Current-limiting resistor

( Terminal block Relay Relay Relay Relay R.V. coil Solid state relay Solenoid valve coil Heater protector

(IPM)

(LEV)

(L61)

(R61)

(R831)

R64A, R64B

(TB1,TB2)

(X63) (X64) (X66) (X69)

(21S4) (SR61) (21R1)

(26H)

)

(H)

)

MUZ-GA25VA

—

G5NB-1a(for

FQ-208-RK (for

—

Outdoor fan motor thermal fuse

w1 Refer to Revision A. w2 MUZ-GA25VA- (Serial No. ~6021350T)

MUZ-GA25VAH- (Serial No. ~7000000T)

MUZ-GA25VAH

—

230V 130W

—

E1 / E2 / E3 )

SHF-4-10W5

G3MC-202PL

E1 / E2 / E3 w2)

Open 152:

ETA19Z59BZ

ETQ19Z71AY

620+ 420V

D25XB60 250V 20A

250V 3.15A

PS21244-A-203

10A 23.0mH

45m" 5W (1 element)

25m" 5W

10" 5W

G5NB-1a

G4A-1A-PS

G5NB-1a

Open 45:

MUZ-GA35VA

MUZ-GA35VAH

250V 3.15A

—

230V 130W

CAM-MD12ME 12VDC

—

G5NB-1a

—

STF-01AJ503

— —

—

Open 45:

—

Page 10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

Test conditions Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

HEATING

46 46

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A))

LINE

FAN SPEED

HEATING

47 48

Test conditions Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

OUTDOORUNIT

MICROPHONE

High Med.

NOISE CRITERIA CURVES

MUZ-GA25VA MUZ-GA25VAH

MUZ-GA35VA MUZ-GA35VAH

Page 11

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

Service panel

Service port

285

344.5

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52

43-

35-

2 holes 10X21

Drain hole [33 (MUZ-GA25/GA35VAH)

REQUIRED SPACE

Basically open 100mm or more without any obstruction in front and on both sides of the unit.

350mm or more

200mm or more

100mm or more

Open two sides of left, right, or rear side.

Drain hole [42 (MUZ-GA25/GA35VA)

OUTLINES AND DIMENSIONS

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

Unit: mm

Page 12

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

C65

DB61,DB65

DSA61

F61

F71,F801

IC801

IPM

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

SYMBOL

R61,R831

R64A,R64B

SR61

TB1,TB2

TR821

T801

X63,X64,X69

21S4

21R1

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR(INNER FUSE)

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

SOLID STATE RELAY

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

SOLENOID VALVE COIL

WIRING DIAGRAM

MUZ-GA25VAMUZ-GA25VAMUZ-GA25VA- (Serial No. ~6021350T)

BLK

LD-U

CT761

+++

REDRED

WHT

LD-V

F801

C63C

C63B

C63A

CN61

LD-W

R61

WHT

CT781

IPM

T801

IC801

CN642

2134

CN641

2121

CN643

INVERTER P.C. BOARD

R831

LDY

54321

CN601

TR821

RT64

RT62RT61

RT65

GRN

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

BLK

L61

BLK

TAB63

TAB61

L63

L62

WHT

F61

DB61

R64A

R64B

LD70

X64

TAB62

BLK

BLU

3 4

LD69

CN721

X63

F71

NR63NR64

TB800

21S4

DSA61

CN771

C65

SR61

LDE

GRN

DB65

21R1

321

CN923

CN726 CN725

X69

CN727

POWER P.C. BOARD

WHITE

BLU

RED

WHT

BLU

230V~

RED

S2S1S3

V 12-24

TB2

GRN/YLW

~/N

230V 50Hz

TB1

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

POWER

SUPPLY

Page 13

MUZ-GA25VA- (Serial No. 6021351T~) MUZ-GA25VA-

Page 14

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

C65

DB61,DB65

DSA61

F61

F71,F801HIC801

IPM

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

R61,R831

SYMBOL

R64A,R64B

SR61

TB1,TB2

TR821

T801

X63,X64,X66,X69

21S4

21R1

26H

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR(INNER FUSE)

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

NAME

CURRENT-LIMITING RESISTOR

SOLID STATE RELAY

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

SOLENOID VALVE COIL

HEATER PROTECTOR

MUZ-GA25VAH- MUZ-GA25VAH- (Serial No. ~7000000T) MUZ-GA25VAH-

E3E1

BLK

L61

BLK

TAB63

BLK

DB61

BLK

LD-U

R64A

R64B

WHT

RED RED

LD-V

CT761

F801

C63C

C63B

+++

C63A

LD70

X64

CN61

LD-W

CT781

R61

BLK

BLU

3 4

WHT

IPM

T801

LD69

CN721

X63

F71

IC801

TR821

TB800

21S4

CN771

CN642

431212

CN641

CN643

INVERTER P.C. BOARD

LDY

21R1

45 231

CN601

CN725CN727 CN726

R831

DB65

312

CN923

X69

C65

SR61

RT65 RT64RT62RT61

GRN

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

L63

L62

TAB61

WHT

F61

BLU

WHT

TB2

230V~

TAB62

NR64 NR63

RED

V 12-24

CONNECTING TO INDOOR UNIT

DSA61

LDE

POWER P.C. BOARD

GRN

GRN/YLW

~/N

230V 50Hz

POWER

SUPPLY

TB1

CIRCUIT BREAKER

X66

CN722

RED

BLKBLK

BLK BLK

312

YLW

26H

BLK

WHITE

BLU

RED

Page 15

MUZ-GA25VAH- (Serial No. 7000001T~) MUZ-GA25VAH-

Page 16

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801

IC801

IPM

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

SYMBOL

R61,R831

R64A,R64B

TB1,TB2

TR821

T801

X63,X64

21S4

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

MUZ-GA35VA

~/N

230V~

230V 50Hz

CIRCUIT BREAKER

RED

BLU

WHITE

GRN/YLW

TB1

POWER

SUPPLY

R64A

TB2

TO INDOOR UNIT

CONNECTING

RED

BLU

WHT

R64B

WHT

+++

NR63

LDE

GRN

231

CN601

31 24

51 3

CN931 CN932

431212

TB800

RT65 RT64RT62RT61

POWER P.C. BOARD

CN643

CN641

INVERTER P.C. BOARD

CN642

21S4

X63

CN721

IC801

F801

C63C

LD-V

LD-W

LD-U

WHT

BLK

RED RED

BLK

WHT

CN61

IPM

CT781

CT761

CN724

LEV

R61

L61

BLK

R831

TAB63

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

NR64

DSA61

F61

LDY

TAB61

L62

X64

F71

TAB62

GRN

BLK

BLU

CN727CN72

CN725

12-24

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

Page 17

MUZ-GA35VAH

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801HIC801

IPM

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

R61,R831

SYMBOL

R64A,R64B

TB1,TB2

TR821

T801

X63,X64,X66

21S4

26H

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

NAME

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

HEATER PROTECTOR

BLK

L61

BLK

LD-U

DB61

TAB63

R64A

R64B

WHT

RED RED

LD-V

CT761

F801

+++

LD-W

C63C

C63B

C63A

LD70

X64

CN61

CT781

R61

BLK

BLU

3 4

WHT

IPM

T801

CN724

LD69

X63

LEV

IC801

TR821

TB800

21S4

CN642

431212

CN641

CN643

3 2 1

INVERTER P.C. BOARD

5 3

CN931 CN932

R831

LDY

CN725

23145

CN601

DB65

CN727CN72

CN721

5 31

GRN

RT65 RT64RT62RT61

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

L63

L62

TAB61

WHT

F61

WHT

TB2

230V~

BLU

TAB62

RED

V 12-24

F71

DSA61

LDE

NR64 NR63

GRN

GRN/YLW

TB1

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

~/N

230V 50Hz

X66

WHITE

BLU

312

CN722

POWER P.C. BOARD

BLK

RED

YLW

BLKBLK

BLK

BLK BLK

POWER

26H

SUPPLY

RED

Page 18

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801,F901

IC801

IPM,IC932

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

SYMBOL

R61,R831

R64A,R64B

TB1,TB2

TR821

T801

X63,X64

21S4

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

MUZ-GA35VA

Alternative inverter P.C. board

BLK

RED

CN61

WHT

BLK

RED

LD-W

LD-U

LD-V

CT761

R61

WHT

CT781

IPM

LEV

724

CN931

IC932

F901

CN932

3 2 1

5 42 3

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

L61

DB61

BLK

TAB63

L63

L62

TAB61

WHT

F61

+++

R64A

R64B

F801

C63C

C63B

C63A

LD70

X64

TAB62

BLK

T801

BLU

NR63

NR64

LD69

X63

F71

IC801

TR821

TB800

21S4

DSA61

GRN

DB65

CN721

LDE

CN642

21213412

CN641

INVERTER P.C. BOARD

CN643

R831

LDY

CN601

725

726

727

RT61 RT62 RT64RT65

GRN

45 231

POWER P.C. BOARD

WHITE

BLU

RED

WHT

TB2

~ 230V

BLU

RED

12-24V

TB1

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

~/N

230V 50Hz

GRN/YLW

POWER

SUPPLY

Page 19

MUZ-GA35VAH

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DSA61

F61

F71,F801,F901

IC801

IPM,IC932

LEV

SYMBOL

L61

L62,L63MCMF

NR63,NR64

RT61

RT62

RT64

RT65

R61,R831

SYMBOL

R64A,R64B

TB1,TB2

TR821

T801

X63,X64,X66

21S4

26H

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

NAME

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMIST OR

FIN TEMPERATURE THERMIST OR

AMBIENT TEMPERA TURE THERMIST OR

CURRENT-DETECTING RESISTOR

NAME

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

HEATER PROTECTOR

Alternative inverter P.C. board

BLK

LD-U

WHT

RED RED

LD-V

CT761

CN61

LD-W

R61

WHT

CT781

IPM

LEV

CN932

3 2 1

5 3

24 1

5 31

the indoor unit electric wiring diagram for

servicing.

2.Use copper conductors only. (For field wiring)

3. Symbols below indicate.

/: Terminal block, : Connector

NOTE:1. About the indoor side electric wiring refer to

724

IC932

CN931

F901

BLK

L61

BLK

TAB63

TAB61

TB2

DB61

L63

L62

WHT

F61

WHT

230V~

F801

+++

R64A

R64B

BLU

T801

C63C

C63B

C63A

LD70

BLK

BLU

X64

TAB62

NR64 NR63

RED

V 12-24

CONNECTING TO INDOOR UNIT

CIRCUIT BREAKER

LD69

X63

F71

TB1

IC801

TR821

TB800

21S4

DSA61

GRN

~/N

CN642

431212

CN641

INVERTER P.C. BOARD

CN643

R831

LDY

CN725

23145

CN601

DB65

CN727CN72

CN721

X66

LDE

POWER P.C. BOARD

GRN/YLW

POWER

SUPPLY

230V 50Hz

CN722

RED

BLKBLK

BLK BLK

312

YLW

26H

BLK

RT65 RT64RT62RT61

GRN

WHITE

BLU

RED

Page 20

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Refrigerant flow in cooling

Compressor

Muffler

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer #100

Capillary tube [3.0✕[1.4✕800

Check valve

Capillary tube [3.0✕[1.4✕500

Solenoid valve

Ambient temperature thermistor RT65

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Refrigerant flow in cooling

Compressor

Muffler

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer #100

Capillary tube [3.0✕[1.4✕800

Check valve

Capillary tube [3.0✕[1.4✕500

Solenoid

valve

Ambient temperature thermistor RT65

Capillary tube [3.0✕[1.4✕400

Check valve

REFRIGERANT SYSTEM DIAGRAM

MUZ-GA25VA - MUZ-GA25VA MUZ-GA25VAH - MUZ-GA25VAH -

E2E1

Unit:mm

MUZ-GA25VA MUZ-GA25VAH -

Unit:mm

Page 21

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Refrigerant flow in cooling

Compressor

Muffler

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer #100

Capillary tube [3.0✕[1.4✕800

Ambient temperature thermistor RT65

Capillary tube [3.0✕[1.4✕400

Check valve

MUZ-GA25VA -

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainer)

Stop valve (with service port)

Capillary tube [3.0✕[2.0✕240

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

LEV

R.V. coil heating ON cooling OFF

Strainer #100

Muffler

Ambient temperature thermistor RT65

Muffler

MUZ-GA25VAH -

Unit:mm

MUZ-GA35VA MUZ-GA35VAH

Unit:mm

Page 22

Outdoor unit

precharged

14m

270

11m

180

Model

Refrigerant piping length (one way)

120

10m

150

12m

210

13m

240

15m

300

20m

450

850

900

MUZ-GA25VA MUZ-GA25VAH

MUZ-GA35VA MUZ-GA35VAH

Max. length A

Max. Height

difference

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Max. length

Max. Height difference

Model

Gas

9.52

Liquid

6.35

Piping size O.D : mm

Refrigerant piping : m

MUZ-GA25VA MUZ-GA25VAH MUZ-GA35VA MUZ-GA35VAH

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

Calculation : Xg=30g/m ✕ (Refrigerant piping length (m)–5)

NOTE: Refrigerant piping exceeding 7m requires additional refrigerant charge according to the calculation.

Page 23

PERFORMANCE CURVES8

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198 ~ 264V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °C WB (2) Indoor outlet air wet-bulb temperature : °C WB (3) Outdoor intake air dry-bulb temperature : °C DB (4) Total input: W (5) Indoor intake air dry-bulb temperature : °C DB (6) Outdoor intake air wet-bulb temperature : °C WB (7) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb / dry-bulb temperature difference

1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

}

Cooling

Heating

INDOOR UNIT

Wet and dry-bulb thermometers

8-1. Capacity and input curves

6.4

5.8

5.3

4.9

4.4

difference (degree)

3.9

Indoor air Wet-bulb temperature

9.1

8.3

7.6

6.8

6.1

5.5

OUTDOOR UNIT

Indoor intake air Wet-bulb temperature (

Wet and dry-bulb thermometers

Indoor intake air W

et-bulb tem

perature (

)

MUZ-GA25VAH

MUZ-GA25VA

MUZ-GA35VA

Rated frequency 65Hz

Outdoor intake air Dry-bulb temperature (:)

MUZ-GA35VAH

Rated frequency 88Hz

Outdoor intake air Dry-bulb temperature (:)

Page 24

Correction of Cooling total input

Input correction factors

The operational frequency of compressor

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

Correction of Cooling capacity

Capacity correction factors

The operational frequency of compressor

Correction of Cooling total input

Input correction factors

The operational frequency of compressor

Correction of Heating total input

The operational frequency of compressor

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

Correction of Heating total input

Input correction factors

The operational frequency of compressor

Correction of Heating capacity

Capacity correction factors

The operational frequency of compressor

Input correction factors

MUZ-GA25VA MUZ-GA25VAH

MUZ-GA35VA MUZ-GA35VAH

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

0 50 100 150(Hz)

0.0

0.5

1.0

1.5

2.0

19.7

18.2

16.7

15.2

13.7

12.1

10.6

9.1

24.7

22.8

20.9

19.0

17.1

15.2

13.3

11.4

Indoor air Dry-bulb temperature

difference (degree)

Indoor intake air Dry-bulb tem

perature (

)

Outdoor intake air Wet-bulb temperature (:)

Indoor intake air Dry-bulb temperature (

Rated frequency 85Hz

Rated frequency 96Hz

MUZ-GA35VA

MUZ-GA35VAH

MUZ-GA25VA

MUZ-GA25VAH

NOTE:The above broken lines are for the heating operation without any frost and

defrost operation.

8-2. Capacity and input correction by operational frequency of compressor

8-3. Test run operation (How to operate fixed-frequency operation)

1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice).

2. Test run operation starts and continues to operate for 30 minutes.

3. Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode.

4. Indoor fan operates at High speed.

5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on

varies). remote controller.

Page 25

8-4. Outdoor low pressure and outdoor unit current

Dry bulb temperature (°C)

Indoor

20.0

14.521

Outdoor 7 6

151220.0

14.5

Wet bulb temperature (°C)

COOL operation

1 Both indoor and outdoor unit are under the

same temperature/humidity condition.

2 Operation : TEST RUN OPERATION (refer to 8-3.)

MUZ-GA25VA MUZ-GA25VAH

(kgf/F [Gauge]) (MPa [Gauge])

1.4

1.2

1.0

0.8

0.6

Outdoor low pressure

0.4

4 2

0.2 15 2050256030

18 32

Ambient temperature(˚C) Ambient humidity(%)

MUZ-GA25VA MUZ-GA25VAH

3.5

70 (%)

(kgf/F [Gauge]) (MPa [Gauge])

65Hz

35(˚C)

12 10

8 6

Outdoor low pressure

4 2

Ambient temperature(˚C) Ambient humidity(%)

Dry-bulb temperature(:)

MUZ-GA35VA MUZ-GA35VAH

1.4

1.2

1.0

0.8

0.6

0.4

0.2 15 2050256030

18 32

MUZ-GA35VA MUZ-GA35VAH

20 25 30 70

88Hz

35(˚C)

70 (%)

88Hz

Relative humidity(%)

50 60

65Hz

2.5

Outdoor unit current(A)

15 2050256030

Ambient temperature(˚C) Ambient humidity(%)

35(˚C)

70 (%)

HEAT operation

1 Condition :

2 Operation : Test run operation (refer to 8-3.)

MUZ-GA25VA MUZ-GA25VAH

3.0

2.5

2.0

1.5

1.0

0.5

Outdoor unit current (A)

0.0 2

5 10 15 20 25(:)

Ambient temperature(˚C)

58Hz

Outdoor unit current(A)

15 205025

Ambient temperature(˚C) Ambient humidity(%)

35(˚C)

70 (%)

MUZ-GA35VA MUZ-GA35VAH

4.0

3.5

3.0

2.5

2.0

1.5

Outdoor unit current (A)

1.0 2

5 10 15 20 25(:)

Ambient temperature(˚C)

58Hz

Page 26

21 18 2.94 1.79 0.61 512 2.81 1.72 0.61 538 2.70 1.65 0.61 563 2.60 1.59 0.61 589 21 20 3.06 1.50 0.49 538 2.94 1.44 0.49 570 2.85 1.40 0.49 582 2.75 1.35 0.49 608 22 18 2.94 1.91 0.65 512 2.81 1.83 0.65 538 2.70 1.76 0.65 563 2.60 1.69 0.65 589 22 20 3.06 1.62 0.53 538 2.94 1.56 0.53 570 2.85 1.51 0.53 582 2.75 1.46 0.53 608 22 22 3.19 1.31 0.41 557 3.08 1.26 0.41 592 3.00 1.23 0.41 608 2.88 1.18 0.41 634 23 18 2.94 2.03 0.69 512 2.81 1.94 0.69 538 2.70 1.86 0.69 563 2.60 1.79 0.69 589 23 20 3.06 1.75 0.57 538 2.94 1.67 0.57 570 2.85 1.62 0.57 582 2.75 1.57 0.57 608 23 22 3.19 1.43 0.45 557 3.08 1.38 0.45 592 3.00 1.35 0.45 608 2.88 1.29 0.45 634 24 18 2.94 2.14 0.73 512 2.81 2.05 0.73 538 2.70 1.97 0.73 563 2.60 1.90 0.73 589 24 20 3.06 1.87 0.61 538 2.94 1.79 0.61 570 2.85 1.74 0.61 582 2.75 1.68 0.61 608 24 22 3.19 1.56 0.49 557 3.08 1.51 0.49 592 3.00 1.47 0.49 608 2.88 1.41 0.49 634 24 24 3.35 1.24 0.37 582 3.23 1.19 0.37 614 3.15 1.17 0.37 634 3.05 1.13 0.37 666 25 18 2.94 2.26 0.77 512 2.81 2.17 0.77 538 2.70 2.08 0.77 563 2.60 2.00 0.77 589 25 20 3.06 1.99 0.65 538 2.94 1.91 0.65 570 2.85 1.85 0.65 582 2.75 1.79 0.65 608 25 22 3.19 1.69 0.53 557 3.08 1.63 0.53 592 3.00 1.59 0.53 608 2.88 1.52 0.53 634 25 24 3.35 1.37 0.41 582 3.23 1.32 0.41 614 3.15 1.29 0.41 634 3.05 1.25 0.41 666 26 18 2.94 2.38 0.81 512 2.81 2.28 0.81 538 2.70 2.19 0.81 563 2.60 2.11 0.81 589 26 20 3.06 2.11 0.69 538 2.94 2.03 0.69 570 2.85 1.97 0.69 582 2.75 1.90 0.69 608 26 22 3.19 1.82 0.57 557 3.08 1.75 0.57 592 3.00 1.71 0.57 608 2.88 1.64 0.57 634 26 24 3.35 1.51 0.45 582 3.23 1.45 0.45 614 3.15 1.42 0.45 634 3.05 1.37 0.45 666 26 26 3.45 1.14 0.33 614 3.35 1.11 0.33 646 3.30 1.09 0.33 666 3.20 1.06 0.33 685 27 18 2.94 2.50 0.85 512 2.81 2.39 0.85 538 2.70 2.30 0.85 563 2.60 2.21 0.85 589 27 20 3.06 2.24 0.73 538 2.94 2.14 0.73 570 2.85 2.08 0.73 582 2.75 2.01 0.73 608 27 22 3.19 1.94 0.61 557 3.08 1.88 0.61 592 3.00 1.83 0.61 608 2.88 1.75 0.61 634 27 24 3.35 1.64 0.49 582 3.23 1.58 0.49 614 3.15 1.54 0.49 634 3.05 1.49 0.49 666 27 26 3.45 1.28 0.37 614 3.35 1.24 0.37 646 3.30 1.22 0.37 666 3.20 1.18 0.37 685 28 18 2.94 2.61 0.89 512 2.81 2.50 0.89 538 2.70 2.40 0.89 563 2.60 2.31 0.89 589 28 20 3.06 2.36 0.77 538 2.94 2.26 0.77 570 2.85 2.19 0.77 582 2.75 2.12 0.77 608 28 22 3.19 2.07 0.65 557 3.08 2.00 0.65 592 3.00 1.95 0.65 608 2.88 1.87 0.65 634 28 24 3.35 1.78 0.53 582 3.23 1.71 0.53 614 3.15 1.67 0.53 634 3.05 1.62 0.53 666 28 26 3.45 1.41 0.41 614 3.35 1.37 0.41 646 3.30 1.35 0.41 666 3.20 1.31 0.41 685 29 18 2.94 2.73 0.93 512 2.81 2.62 0.93 538 2.70 2.51 0.93 563 2.60 2.42 0.93 589 29 20 3.06 2.48 0.81 538 2.94 2.38 0.81 570 2.85 2.31 0.81 582 2.75 2.23 0.81 608 29 22 3.19 2.20 0.69 557 3.08 2.12 0.69 592 3.00 2.07 0.69 608 2.88 1.98 0.69 634 29 24 3.35 1.91 0.57 582 3.23 1.84 0.57 614 3.15 1.80 0.57 634 3.05 1.74 0.57 666 29 26 3.45 1.55 0.45 614 3.35 1.51 0.45 646 3.30 1.49 0.45 666 3.20 1.44 0.45 685 30 18 2.94 2.85 0.97 512 2.81 2.73 0.97 538 2.70 2.62 0.97 563 2.60 2.52 0.97 589 30 20 3.06 2.60 0.85 538 2.94 2.50 0.85 570 2.85 2.42 0.85 582 2.75 2.34 0.85 608 30 22 3.19 2.33 0.73 557 3.08 2.24 0.73 592 3.00 2.19 0.73 608 2.88 2.10 0.73 634 30 24 3.35 2.04 0.61 582 3.23 1.97 0.61 614 3.15 1.92 0.61 634 3.05 1.86 0.61 666 30 26 3.45 1.69 0.49 614 3.35 1.64 0.49 646 3.30 1.62 0.49 666 3.20 1.57 0.49 685 31 18 2.94 2.97 1.01 512 2.81 2.84 1.01 538 2.70 2.73 1.01 563 2.60 2.63 1.01 589 31 20 3.06 2.73 0.89 538 2.94 2.61 0.89 570 2.85 2.54 0.89 582 2.75 2.45 0.89 608 31 22 3.19 2.45 0.77 557 3.08 2.37 0.77 592 3.00 2.31 0.77 608 2.88 2.21 0.77 634 31 24 3.35 2.18 0.65 582 3.23 2.10 0.65 614 3.15 2.05 0.65 634 3.05 1.98 0.65 666 31 26 3.45 1.83 0.53 614 3.35 1.78 0.53 646 3.30 1.75 0.53 666 3.20 1.70 0.53 685 32 18 2.94 3.08 1.05 512 2.81 2.95 1.05 538 2.70 2.84 1.05 563 2.60 2.73 1.05 589 32 20 3.06 2.85 0.93 538 2.94 2.73 0.93 570 2.85 2.65 0.93 582 2.75 2.56 0.93 608 32 22 3.19 2.58 0.81 557 3.08 2.49 0.81 592 3.00 2.43 0.81 608 2.88 2.33 0.81 634 32 24 3.35 2.31 0.69 582 3.23 2.23 0.69 614 3.15 2.17 0.69 634 3.05 2.10 0.69 666 32 26 3.45 1.97 0.57 614 3.35 1.91 0.57 646 3.30 1.88 0.57 666 3.20 1.82 0.57 685

INDOOR INDOOR

CAPACITY:2.5(kW)

INPUT:640(W)SHF:0.79

OUTDOOR DB(:)

25 27 30

WB(:)

Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHFINPUT INPUT INPUT INPUT

DB(:)

PERFORMANCE DATA COOL operation Rated frequency 65Hz

MUZ-GA25VA MUZ-GA25VAH

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Page 27

PERFORMANCE DATA COOL operation Rated frequency 65Hz

MUZ-GA25VA MUZ-GA25VAH

CAPACITY:2.5(kW)

INDOOR INDOOR

DB (:) WB (:)

21 18 2.45 1.49 0.61 627 2.25 1.37 0.61 666 2.08 1.27 0.61 691 21 20 2.58 1.26 0.49 653 2.40 1.18 0.49 685 2.23 1.09 0.49 723 22 18 2.45 1.59 0.65 627 2.25 1.46 0.65 666 2.08 1.35 0.65 691 22 20 2.58 1.36 0.53 653 2.40 1.27 0.53 685 2.23 1.18 0.53 723 22 22 2.73 1.12 0.41 678 2.55 1.05 0.41 717 2.38 0.97 0.41 742 23 18 2.45 1.69 0.69 627 2.25 1.55 0.69 666 2.08 1.43 0.69 691 23 20 2.58 1.47 0.57 653 2.40 1.37 0.57 685 2.23 1.27 0.57 723 23 22 2.73 1.23 0.45 678 2.55 1.15 0.45 717 2.38 1.07 0.45 742 24 18 2.45 1.79 0.73 627 2.25 1.64 0.73 666 2.08 1.51 0.73 691 24 20 2.58 1.57 0.61 653 2.40 1.46 0.61 685 2.23 1.36 0.61 723 24 22 2.73 1.34 0.49 678 2.55 1.25 0.49 717 2.38 1.16 0.49 742 24 24 2.88 1.06 0.37 704 2.70 1.00 0.37 736 2.55 0.94 0.37 768 25 18 2.45 1.89 0.77 627 2.25 1.73 0.77 666 2.08 1.60 0.77 691 25 20 2.58 1.67 0.65 653 2.40 1.56 0.65 685 2.23 1.45 0.65 723 25 22 2.73 1.44 0.53 678 2.55 1.35 0.53 717 2.38 1.26 0.53 742 25 24 2.88 1.18 0.41 704 2.70 1.11 0.41 736 2.55 1.05 0.41 768 26 18 2.45 1.98 0.81 627 2.25 1.82 0.81 666 2.08 1.68 0.81 691 26 20 2.58 1.78 0.69 653 2.40 1.66 0.69 685 2.23 1.54 0.69 723 26 22 2.73 1.55 0.57 678 2.55 1.45 0.57 717 2.38 1.35 0.57 742 26 24 2.88 1.29 0.45 704 2.70 1.22 0.45 736 2.55 1.15 0.45 768 26 26 3.03 1.00 0.33 730 2.85 0.94 0.33 762 2.68 0.88 0.33 794 27 18 2.45 2.08 0.85 627 2.25 1.91 0.85 666 2.08 1.76 0.85 691 27 20 2.58 1.88 0.73 653 2.40 1.75 0.73 685 2.23 1.62 0.73 723 27 22 2.73 1.66 0.61 678 2.55 1.56 0.61 717 2.38 1.45 0.61 742 27 24 2.88 1.41 0.49 704 2.70 1.32 0.49 736 2.55 1.25 0.49 768 27 26 3.03 1.12 0.37 730 2.85 1.05 0.37 762 2.68 0.99 0.37 794 28 18 2.45 2.18 0.89 627 2.25 2.00 0.89 666 2.08 1.85 0.89 691 28 20 2.58 1.98 0.77 653 2.40 1.85 0.77 685 2.23 1.71 0.77 723 28 22 2.73 1.77 0.65 678 2.55 1.66 0.65 717 2.38 1.54 0.65 742 28 24 2.88 1.52 0.53 704 2.70 1.43 0.53 736 2.55 1.35 0.53 768 28 26 3.03 1.24 0.41 730 2.85 1.17 0.41 762 2.68 1.10 0.41 794 29 18 2.45 2.28 0.93 627 2.25 2.09 0.93 666 2.08 1.93 0.93 691 29 20 2.58 2.09 0.81 653 2.40 1.94 0.81 685 2.23 1.80 0.81 723 29 22 2.73 1.88 0.69 678 2.55 1.76 0.69 717 2.38 1.64 0.69 742 29 24 2.88 1.64 0.57 704 2.70 1.54 0.57 736 2.55 1.45 0.57 768 29 26 3.03 1.36 0.45 730 2.85 1.28 0.45 762 2.68 1.20 0.45 794 30 18 2.45 2.38 0.97 627 2.25 2.18 0.97 666 2.08 2.01 0.97 691 30 20 2.58 2.19 0.85 653 2.40 2.04 0.85 685 2.23 1.89 0.85 723 30 22 2.73 1.99 0.73 678 2.55 1.86 0.73 717 2.38 1.73 0.73 742 30 24 2.88 1.75 0.61 704 2.70 1.65 0.61 736 2.55 1.56 0.61 768 30 26 3.03 1.48 0.49 730 2.85 1.40 0.49 762 2.68 1.31 0.49 794 31 18 2.45 2.47 1.01 627 2.25 2.27 1.01 666 2.08 2.10 1.01 691 31 20 2.58 2.29 0.89 653 2.40 2.14 0.89 685 2.23 1.98 0.89 723 31 22 2.73 2.10 0.77 678 2.55 1.96 0.77 717 2.38 1.83 0.77 742 31 24 2.88 1.87 0.65 704 2.70 1.76 0.65 736 2.55 1.66 0.65 768 31 26 3.03 1.60 0.53 730 2.85 1.51 0.53 762 2.68 1.42 0.53 794 32 18 2.45 2.57 1.05 627 2.25 2.36 1.05 666 2.08 2.18 1.05 691 32 20 2.58 2.39 0.93 653 2.40 2.23 0.93 685 2.23 2.07 0.93 723 32 22 2.73 2.21 0.81 678 2.55 2.07 0.81 717 2.38 1.92 0.81 742 32 24 2.88 1.98 0.69 704 2.70 1.86 0.69 736 2.55 1.76 0.69 768 32 26 3.03 1.72 0.57 730 2.85 1.62 0.57 762 2.68 1.52 0.57 794

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

INPUT:640(W)SHF:0.79

OUTDOOR DB(:)

35 40 46

Page 28

21 18 4.11 2.39 0.58 864 3.94 2.28 0.58 907 3.78 2.19 0.58 950 3.64 2.11 0.58 994 21 20 4.29 1.97 0.46 907 4.11 1.89 0.46 961 3.99 1.84 0.46 983 3.85 1.77 0.46 1026 22 18 4.11 2.55 0.62 864 3.94 2.44 0.62 907 3.78 2.34 0.62 950 3.64 2.26 0.62 994 22 20 4.29 2.14 0.50 907 4.11 2.06 0.50 961 3.99 2.00 0.50 983 3.85 1.93 0.50 1026 22 22 4.46 1.70 0.38 940 4.31 1.64 0.38 999 4.20 1.60 0.38 1026 4.03 1.53 0.38 1069 23 18 4.11 2.71 0.66 864 3.94 2.60 0.66 907 3.78 2.49 0.66 950 3.64 2.40 0.66 994 23 20 4.29 2.32 0.54 907 4.11 2.22 0.54 961 3.99 2.15 0.54 983 3.85 2.08 0.54 1026 23 22 4.46 1.87 0.42 940 4.31 1.81 0.42 999 4.20 1.76 0.42 1026 4.03 1.69 0.42 1069 24 18 4.11 2.88 0.70 864 3.94 2.76 0.70 907 3.78 2.65 0.70 950 3.64 2.55 0.70 994 24 20 4.29 2.49 0.58 907 4.11 2.39 0.58 961 3.99 2.31 0.58 983 3.85 2.23 0.58 1026 24 22 4.46 2.05 0.46 940 4.31 1.98 0.46 999 4.20 1.93 0.46 1026 4.03 1.85 0.46 1069 24 24 4.69 1.59 0.34 983 4.52 1.54 0.34 1037 4.41 1.50 0.34 1069 4.27 1.45 0.34 1123 25 18 4.11 3.04 0.74 864 3.94 2.91 0.74 907 3.78 2.80 0.74 950 3.64 2.69 0.74 994 25 20 4.29 2.66 0.62 907 4.11 2.55 0.62 961 3.99 2.47 0.62 983 3.85 2.39 0.62 1026 25 22 4.46 2.23 0.50 940 4.31 2.15 0.50 999 4.20 2.10 0.50 1026 4.03 2.01 0.50 1069 25 24 4.69 1.78 0.38 983 4.52 1.72 0.38 1037 4.41 1.68 0.38 1069 4.27 1.62 0.38 1123 26 18 4.11 3.21 0.78 864 3.94 3.07 0.78 907 3.78 2.95 0.78 950 3.64 2.84 0.78 994 26 20 4.29 2.83 0.66 907 4.11 2.71 0.66 961 3.99 2.63 0.66 983 3.85 2.54 0.66 1026 26 22 4.46 2.41 0.54 940 4.31 2.32 0.54 999 4.20 2.27 0.54 1026 4.03 2.17 0.54 1069 26 24 4.69 1.97 0.42 983 4.52 1.90 0.42 1037 4.41 1.85 0.42 1069 4.27 1.79 0.42 1123 26 26 4.83 1.45 0.30 1037 4.69 1.41 0.30 1091 4.62 1.39 0.30 1123 4.48 1.34 0.30 1156 27 18 4.11 3.37 0.82 864 3.94 3.23 0.82 907 3.78 3.10 0.82 950 3.64 2.98 0.82 994 27 20 4.29 3.00 0.70 907 4.11 2.88 0.70 961 3.99 2.79 0.70 983 3.85 2.70 0.70 1026 27 22 4.46 2.59 0.58 940 4.31 2.50 0.58 999 4.20 2.44 0.58 1026 4.03 2.33 0.58 1069 27 24 4.69 2.16 0.46 983 4.52 2.08 0.46 1037 4.41 2.03 0.46 1069 4.27 1.96 0.46 1123 27 26 4.83 1.64 0.34 1037 4.69 1.59 0.34 1091 4.62 1.57 0.34 1123 4.48 1.52 0.34 1156 28 18 4.11 3.54 0.86 864 3.94 3.39 0.86 907 3.78 3.25 0.86 950 3.64 3.13 0.86 994 28 20 4.29 3.17 0.74 907 4.11 3.04 0.74 961 3.99 2.95 0.74 983 3.85 2.85 0.74 1026 28 22 4.46 2.77 0.62 940 4.31 2.67 0.62 999 4.20 2.60 0.62 1026 4.03 2.50 0.62 1069 28 24 4.69 2.35 0.50 983 4.52 2.26 0.50 1037 4.41 2.21 0.50 1069 4.27 2.14 0.50 1123 28 26 4.83 1.84 0.38 1037 4.69 1.78 0.38 1091 4.62 1.76 0.38 1123 4.48 1.70 0.38 1156 29 18 4.11 3.70 0.90 864 3.94 3.54 0.90 907 3.78 3.40 0.90 950 3.64 3.28 0.90 994 29 20 4.29 3.34 0.78 907 4.11 3.21 0.78 961 3.99 3.11 0.78 983 3.85 3.00 0.78 1026 29 22 4.46 2.95 0.66 940 4.31 2.84 0.66 999 4.20 2.77 0.66 1026 4.03 2.66 0.66 1069 29 24 4.69 2.53 0.54 983 4.52 2.44 0.54 1037 4.41 2.38 0.54 1069 4.27 2.31 0.54 1123 29 26 4.83 2.03 0.42 1037 4.69 1.97 0.42 1091 4.62 1.94 0.42 1123 4.48 1.88 0.42 1156 30 18 4.11 3.87 0.94 864 3.94 3.70 0.94 907 3.78 3.55 0.94 950 3.64 3.42 0.94 994 30 20 4.29 3.52 0.82 907 4.11 3.37 0.82 961 3.99 3.27 0.82 983 3.85 3.16 0.82 1026 30 22 4.46 3.12 0.70 940 4.31 3.01 0.70 999 4.20 2.94 0.70 1026 4.03 2.82 0.70 1069 30 24 4.69 2.72 0.58 983 4.52 2.62 0.58 1037 4.41 2.56 0.58 1069 4.27 2.48 0.58 1123 30 26 4.83 2.22 0.46 1037 4.69 2.16 0.46 1091 4.62 2.13 0.46 1123 4.48 2.06 0.46 1156 31 18 4.11 4.03 0.98 864 3.94 3.86 0.98 907 3.78 3.70 0.98 950 3.64 3.57 0.98 994 31 20 4.29 3.69 0.86 907 4.11 3.54 0.86 961 3.99 3.43 0.86 983 3.85 3.31 0.86 1026 31 22 4.46 3.30 0.74 940 4.31 3.19 0.74 999 4.20 3.11 0.74 1026 4.03 2.98 0.74 1069 31 24 4.69 2.91 0.62 983 4.52 2.80 0.62 1037 4.41 2.73 0.62 1069 4.27 2.65 0.62 1123 31 26 4.83 2.42 0.50 1037 4.69 2.35 0.50 1091 4.62 2.31 0.50 1123 4.48 2.24 0.50 1156 32 18 4.11 4.19 1.02 864 3.94 4.02 1.02 907 3.78 3.86 1.02 950 3.64 3.71 1.02 994 32 20 4.29 3.86 0.90 907 4.11 3.70 0.90 961 3.99 3.59 0.90 983 3.85 3.47 0.90 1026 32 22 4.46 3.48 0.78 940 4.31 3.36 0.78 999 4.20 3.28 0.78 1026 4.03 3.14 0.78 1069 32 24 4.69 3.10 0.66 983 4.52 2.98 0.66 1037 4.41 2.91 0.66 1069 4.27 2.82 0.66 1123 32 26 4.83 2.61 0.54 1037 4.69 2.53 0.54 1091 4.62 2.49 0.54 1123 4.48 2.42 0.54 1156

INDOOR INDOOR

CAPACITY:3.5(kW)

INPUT:1080(W)SHF:0.76

OUTDOOR DB(:)

25 27 30

WB(:)

Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHFINPUT INPUT INPUT INPUT

DB(:)

PERFORMANCE DATA COOL operation Rated frequency 88Hz

MUZ-GA35VA MUZ-GA35VAH

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Page 29

PERFORMANCE DATA COOL operation Rated frequency 88Hz

MUZ-GA35VA MUZ-GA35VAH

CAPACITY:3.5(kW)

INDOOR INDOOR

DB (:) WB (:)

21 18 3.43 1.99 0.58 1058 3.15 1.83 0.58 1123 2.91 1.68 0.58 1166 21 20 3.61 1.66 0.46 1102 3.36 1.55 0.46 1156 3.12 1.43 0.46 1220 22 18 3.43 2.13 0.62 1058 3.15 1.95 0.62 1123 2.91 1.80 0.62 1166 22 20 3.61 1.80 0.50 1102 3.36 1.68 0.50 1156 3.12 1.56 0.50 1220 22 22 3.82 1.45 0.38 1145 3.57 1.36 0.38 1210 3.33 1.26 0.38 1253 23 18 3.43 2.26 0.66 1058 3.15 2.08 0.66 1123 2.91 1.92 0.66 1166 23 20 3.61 1.95 0.54 1102 3.36 1.81 0.54 1156 3.12 1.68 0.54 1220 23 22 3.82 1.60 0.42 1145 3.57 1.50 0.42 1210 3.33 1.40 0.42 1253 24 18 3.43 2.40 0.70 1058 3.15 2.21 0.70 1123 2.91 2.03 0.70 1166 24 20 3.61 2.09 0.58 1102 3.36 1.95 0.58 1156 3.12 1.81 0.58 1220 24 22 3.82 1.75 0.46 1145 3.57 1.64 0.46 1210 3.33 1.53 0.46 1253 24 24 4.03 1.37 0.34 1188 3.78 1.29 0.34 1242 3.57 1.21 0.34 1296 25 18 3.43 2.54 0.74 1058 3.15 2.33 0.74 1123 2.91 2.15 0.74 1166 25 20 3.61 2.24 0.62 1102 3.36 2.08 0.62 1156 3.12 1.93 0.62 1220 25 22 3.82 1.91 0.50 1145 3.57 1.79 0.50 1210 3.33 1.66 0.50 1253 25 24 4.03 1.53 0.38 1188 3.78 1.44 0.38 1242 3.57 1.36 0.38 1296 26 18 3.43 2.68 0.78 1058 3.15 2.46 0.78 1123 2.91 2.27 0.78 1166 26 20 3.61 2.38 0.66 1102 3.36 2.22 0.66 1156 3.12 2.06 0.66 1220 26 22 3.82 2.06 0.54 1145 3.57 1.93 0.54 1210 3.33 1.80 0.54 1253 26 24 4.03 1.69 0.42 1188 3.78 1.59 0.42 1242 3.57 1.50 0.42 1296 26 26 4.24 1.27 0.30 1231 3.99 1.20 0.30 1285 3.75 1.12 0.30 1339 27 18 3.43 2.81 0.82 1058 3.15 2.58 0.82 1123 2.91 2.38 0.82 1166 27 20 3.61 2.52 0.70 1102 3.36 2.35 0.70 1156 3.12 2.18 0.70 1220 27 22 3.82 2.21 0.58 1145 3.57 2.07 0.58 1210 3.33 1.93 0.58 1253 27 24 4.03 1.85 0.46 1188 3.78 1.74 0.46 1242 3.57 1.64 0.46 1296 27 26 4.24 1.44 0.34 1231 3.99 1.36 0.34 1285 3.75 1.27 0.34 1339 28 18 3.43 2.95 0.86 1058 3.15 2.71 0.86 1123 2.91 2.50 0.86 1166 28 20 3.61 2.67 0.74 1102 3.36 2.49 0.74 1156 3.12 2.31 0.74 1220 28 22 3.82 2.37 0.62 1145 3.57 2.21 0.62 1210 3.33 2.06 0.62 1253 28 24 4.03 2.01 0.50 1188 3.78 1.89 0.50 1242 3.57 1.79 0.50 1296 28 26 4.24 1.61 0.38 1231 3.99 1.52 0.38 1285 3.75 1.42 0.38 1339 29 18 3.43 3.09 0.90 1058 3.15 2.84 0.90 1123 2.91 2.61 0.90 1166 29 20 3.61 2.81 0.78 1102 3.36 2.62 0.78 1156 3.12 2.43 0.78 1220 29 22 3.82 2.52 0.66 1145 3.57 2.36 0.66 1210 3.33 2.19 0.66 1253 29 24 4.03 2.17 0.54 1188 3.78 2.04 0.54 1242 3.57 1.93 0.54 1296 29 26 4.24 1.78 0.42 1231 3.99 1.68 0.42 1285 3.75 1.57 0.42 1339 30 18 3.43 3.22 0.94 1058 3.15 2.96 0.94 1123 2.91 2.73 0.94 1166 30 20 3.61 2.96 0.82 1102 3.36 2.76 0.82 1156 3.12 2.55 0.82 1220 30 22 3.82 2.67 0.70 1145 3.57 2.50 0.70 1210 3.33 2.33 0.70 1253 30 24 4.03 2.33 0.58 1188 3.78 2.19 0.58 1242 3.57 2.07 0.58 1296 30 26 4.24 1.95 0.46 1231 3.99 1.84 0.46 1285 3.75 1.72 0.46 1339 31 18 3.43 3.36 0.98 1058 3.15 3.09 0.98 1123 2.91 2.85 0.98 1166 31 20 3.61 3.10 0.86 1102 3.36 2.89 0.86 1156 3.12 2.68 0.86 1220 31 22 3.82 2.82 0.74 1145 3.57 2.64 0.74 1210 3.33 2.46 0.74 1253 31 24 4.03 2.50 0.62 1188 3.78 2.34 0.62 1242 3.57 2.21 0.62 1296 31 26 4.24 2.12 0.50 1231 3.99 2.00 0.50 1285 3.75 1.87 0.50 1339 32 18 3.43 3.50 1.02 1058 3.15 3.21 1.02 1123 2.91 2.96 1.02 1166 32 20 3.61 3.24 0.90 1102 3.36 3.02 0.90 1156 3.12 2.80 0.90 1220 32 22 3.82 2.98 0.78 1145 3.57 2.78 0.78 1210 3.33 2.59 0.78 1253 32 24 4.03 2.66 0.66 1188 3.78 2.49 0.66 1242 3.57 2.36 0.66 1296 32 26 4.24 2.29 0.54 1231 3.99 2.15 0.54 1285 3.75 2.02 0.54 1339

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

INPUT:1080(W)SHF:0.76

OUTDOOR DB(:)

35 40 46

Page 30

PERFORMANCE DATA HEAT operation

CAPACITY:3.2(kW)

INPUT:760(W)

OUTDOOR WB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:)

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.02 494 2.43 593 2.85 669 3.26 722 3.68 768 4.06 790 4.48 806 21 1.92 532 2.30 631 2.72 699 3.10 752 3.52 790 3.90 813 4.30 844 26 1.73 570 2.14 669 2.53 737 2.94 790 3.36 828 3.74 851 4.16 874

CAPACITY:4.0(kW)

INPUT:1055(W)

OUTDOOR WB(:)

INDOOR

-10 -5 0 5 10 15 20

DB(:)

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.52 686 3.04 823 3.56 928 4.08 1002 4.60 1066 5.08 1097 5.60 1118 21 2.40 739 2.88 876 3.40 971 3.88 1044 4.40 1097 4.88 1129 5.38 1171 26 2.16 791 2.68 928 3.16 1023 3.68 1097 4.20 1150 4.68 1182 5.20 1213

MUZ-GA25VA MUZ-GA25VAH Rated frequency 85Hz

MUZ-GA35VA MUZ-GA35VAH Rated frequency 96Hz

NOTE Q:Total capacity (kW) INPUT:Total power input (W) DB : Dry-bulb temperature WB : Wet-bulb temperature

Page 31

Discharge temperature thermistor Indoor coil temperature thermistor

Defrost thermistor

Fin temperature thermistor Ambient temperature thermistor

Purpose

Protection Cooling : Coil frost prevention Heating : High pressure protection Cooling : High pressure protection Heating : Defrosting

Protection Cooling : Low ambient temperature operation Heating : Defrosting (Heater)

Compressor

LEV

Outdoor

fan motor

Indoor

fan motor

Defrost

heater

Solenoid

valve

R.V. coil

Sensor

Actuator

w1 w1 w1

w1 MUZ-GA35VA

MUZ-GA35VAH

w2 MUZ-GA25VA-

E1 / E2

E3 (Serial No. ~6021350T)

MUZ-GA25VAH-

E1 / E2

E3 (Serial No. ~7000000T)

OFF

Outdoor fan motor

Compressor

5 seconds 15 seconds

ON OFF

Compressor

Outdoor fan motor

R.V.coil

ON OFF

<COOL>

5 seconds

<HEAT>

5 seconds

ON or OFF

ACTUATOR CONTROL

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

9-1. Outdoor fan motor control

The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

9-2. R.V. coil control

Heating

Cooling

Dry

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

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

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

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

ON OFF OFF

9-3. Relation between main sensor and actuator

Page 32

Jumper wire

Defrost finish temperature

none

(cut)

soldered

(Initial setting)

MUZ-GA35VA

MUZ-GA25VAH MUZ-GA35VAH

MUZ-GA25VA

15:

Housing point

SERVICE FUNCTIONS

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

CHANGE IN DEFROST SETTING

Changing defrost finish temperature

<JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed.

(Refer to 11-7-1.)

TROUBLESHOOTING

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

11-1. Cautions on troubleshooting

1. Before troubleshooting, check the following

1) Check the power supply voltage.

2) Check the indoor/outdoor connecting wire for mis-wiring.

2. Take care of the following during servicing

1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and / or disconnect the power plug.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3) When removing the electrical parts, be careful to the residual voltage of smoothing capacitor.

4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

5) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring

3. Troubleshooting procedure

1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2) Before servicing check that the connector and terminal are connected properly.

3) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.

4) When troubleshooting, refer to 11-2., 11-3. and 11-4.

Page 33

11-2. Failure mode recall function

Operational procedure

Yes

(Blinks)

(OFF)

Yes

Releasing the failure mode recall function

Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W2. Blinking pattern when the indoor unit is abnormal:

W3.Blinking pattern when the outdoor unit is abnormal:

OFF

Beeps

Repeated cycle Repeated cycle

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5-

second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

Does the left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp. W2

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

Before blinking, does the left lamp of OPERATION INDICATOR lamp stay ON for 3 seconds? Stays ON for 3 seconds (without beep): The outdoor unit is abnormal.

The indoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the indoor unit failure mode table (Refer to indoor unit service manual.) Make sure to check at least two consecutive blinking cycles. W2

Turn ON the power supply. <

Preparation of the remote controller

1 While pressing both OPERATION SELECT

button and TOO COOL button on the remote controller at the same time, press RESET button.

2 First, release RESET button.

And release the other two buttons after all LCD except the set temperature in operation display section of the remote controller is displayed after 3 seconds.

Deleting the memorized abnormal condition

1After repairing the unit, recall the failure mode again according to

"Setting up the failure mode recall function" mentioned above.

2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed)

with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Repair the defective parts.

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

Judgment of indoor/outdoor abnormality

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. W1

Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that can't be recalled with this way. Confirm if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function.(Refer to 11-2.2)

The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table (Refer to 11-2.3). Make sure to check at least two consecutive blinking cycles. W3

W1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.

1. Flow chart of failure mode recall function for the indoor/outdoor unit

Page 34

2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure

Note1. Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.

2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized. W2.Blinking pattern when outdoor unit is abnormal:

Yes

(Blinks)

(OFF)

OFF

No beep

Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5-

second interval

Repeated cycle

W1. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.

Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: The outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp. W2

Deleting the memorized abnormal condition

1After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above. 2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. 4Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Repair the defective parts.

With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 25:. W1

The outdoor unit is normal.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table (Refer to 11-2.3.). Make sure to check at least two consecutive blinking cycles. W2

Release the failure mode recall function according to the left mentioned procedure.

Confirm that the remote controller is in the failure mode recall function.

The outdoor unit might be abnormal. Confirm if outdoor unit is abnormal according to the following procedures.

Page 35

OFF

2-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

6-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

8-time flash

2.5 seconds OFF

9-time flash

2.5 seconds OFF

10-time flash

2.5 seconds OFF

11-time flash

2.5 seconds OFF

12-time flash

2.5 seconds OFF

14-time flash

2.5 seconds OFF

None (Normal)

Outdoor power system

Discharge temperature thermistor

Defrost thermistor

Fin temperature thermistor

P.C. board temperature thermistor

Ambient temperature thermistor

Overcurrent

Compressor synchronous abnormality

( Compressor start-up failure

protection)

Discharge temperature

High pressure

Fin temperature/ P.C. board

temperature

Outdoor fan motor

Nonvolatile memory data

Discharge temperature

DC voltage

Each phase current of compressor

Overcurrent

Compressor open-phase

Outdoor unit

(Other abnormality)

1-time flash every

2.5 seconds

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

2-time flash

2.5 seconds OFF

11-time flash

2.5 seconds OFF

12-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

8-time flash

2.5 seconds OFF

9-time flash

2.5 seconds OFF

10-time flash

2.5 seconds OFF

When it consecutively occurs 3 times that the compressor

stops for overcurrent protection within 1 minute after start-up.

When thermistor shorts or opens during compressor running.

When 14A(MUZ-GA25VA,MUZ-GA25VAH)/ 24A

(MUZ-GA35VA,MUZ-GA35VAH) current flow into intelligent

power module.

When waveform of compressor current is distorted.

When temperature of discharge temperature thermistor

exceeds 116:, compressor stops. Compressor can restart

if discharge temperature thermistor reads 100: or less

3 minutes later.

When temperature of indoor coil thermistor exceeds 70: in

HEAT mode.

When defrost thermistor exceeds 70: in COOL mode.

When temperature of fin temperature thermistor on the

inverter P.C. board exceeds 82 :(MUZ-GA25VA,

MUZ-GA25VAH)/ 83:(MUZ-GA35VA,MUZ-GA35VAH), or

temperature of P.C. board temperature thermistor on the

inverter P.C. board exceeds 81:(MUZ-GA25VA,

MUZ-GA25VAH)/ 85:(MUZ-GA35VA,MUZ-GA35VAH).

When outdoor fan has stopped 3 times in a row within

30 seconds after outdoor fan start-up.

When nonvolatile memory data cannot be read properly.

When temperature of discharge temperature thermistor has

been 50: or less for 20 minutes.

When DC voltage of inverter cannot be detected normally.

When each phase current of compressor cannot

be detected normally.

When 14A(MUZ-GA25VA,MUZ-GA25VAH)/ 24A

(MUZ-GA35VA,MUZ-GA35VAH) current flow into intelligent

power module (IPM).

When the open-phase operation of compressor is detected.

When the interphase short out

occurs in the output of the intelligent power module (IPM).

When the compressor winding shorts out.

When the inverter P.C. board is defective.

•Reconnect connectors.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check stop valve.

•Refer to 11-6.G"Check of

outdoor thermistors".

❈Defective outdoor thermistors

can be identified by checking

the blinking pattern of LED.

•Reconnect compressor connector.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check stop valve.

•Reconnect compressor connector.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Check refrigerant circuit and

refrigerant amount.

•Refer to 11-6.L"Check of LEV".

•Check refrigerant circuit and

refrigerant amount.

•Check stop valve.

•Check around outdoor unit.

•Check outdoor unit air passage.

•Refer to 11-6.I"Check of

outdoor fan motor".

•Refer to 11-6.I"Check of

outdoor fan motor".

Refer to 11-6.N"Check of inverter

P.C. board".

•Replace the inverter P.C. board.

•Refer to 11-6.L"Check of LEV".

•Check refrigerant circuit and

refrigerant amount.

•Refer to 11-6.A"How to check

inverter/ compressor".

•Reconnect compressor connector.

•Refer to 11-6. A"How to check

inverter/ compressor".

•Replace the inverter P.C. board.

The left lamp of

OPERATION

INDICATOR lamp

(Indoor unit)

Abnormal point

(Failure mode / protection)

Condition Correspondence

Indoor/outdoor

unit failure mode

recall function

Outdoor unit

failure mode

recall function

LED indication

(Outdoor P.C. board)

3. Outdoor unit failure mode table NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).

Page 36

Start

Indoor unit operates. Outdoor unit doesn't operate.

Indoor unit doesn't receive the signal from remote controller.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

Outdoor unit operates only in Test Run operation. (Refer to 8-3.)

Outdoor unit doesn't operate even in Test Run operation. (Refer to 8-3.)

Indoor unit operates, when EMERGENCY OPERATION switch is pressed.

Indoor unit doesn't operate, when EMERGENCY OPERATION switch is pressed.

Check room temperature thermistor. Refer to "Test point diagram and voltage".

Refer to 11-6.A "How to check inverter/ compressor".

Refer to "Check of remote controller and receiver P.C. board".

1. Check indoor / outdoor connecting wire. (Check if the power is supplied to the indoor unit.)

2. Refer to "Check of indoor electronic control P.C. board and indoor fan motor".

Unit doesn't operate normal operation in COOL or HEAT mode.

Refer to 11-6.H "Check of R.V. coil".

Left lamp Flash on and off at

0.5-second intervals Cause: Indoor/ Outdoor unit

• Mis-wiring or trouble of serial signal.

Left

lamp 2-time flash Cause: Indoor unit

• Trouble of room temp erature/ indoor coil thermistor

Left

lamp 3-time flash Cause: Indoor unit

• Trouble of indoor fan motor

Left

lamp 5-time flash Cause: Outdoor unit

• Outdoor power system abnormality

Left

lamp 6-time flash Cause: Outdoor unit

• Trouble of thermistor in outdoor unit

Left

lamp 7-time flash Cause: Outdoor unit

• Trouble of outdoor control system

Refer to 11-6.O "How to check of mis-wiring and serial signal error".

(MUZ-GA25/35)

All lamps Flash on and off at 0.5-second intervals Cause: Indoor unit

• The horizontal vane is not installed correctly.

Refer to "Check of installation of the horizontal vane".

Check room temperature thermistor and indoor coil thermistor. Refer to "Test point diagram and voltage".

Refer to "Check of indoor fan motor".

Refer to 11-6.A "How to check inverter/ compressor".

Refer to 11-6.G "Check of outdoor thermistors".

Replace inverter P.C. board or outdoor control electronic control P.C. board.

Left

lamp 14-time flash Cause: Outdoor unit

• Other abnormality

Check 11-2.2. "Flow chart of the detailed outdoor unit failure mode recall function."

Left lamp 4-time flash Cause: Indoor unit

• Trouble of indoor unit control system

Replace the indoor electronic control P.C. board.

Refer to indoor unit service manual.

Indoor unit operates. Outdoor unit doesn't operate normally.

If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function.

11-3. Instruction of troubleshooting

Page 37

Abnormal point/ Condition

When it consecutively occurs 3 times that the compressor stops for overcurrent protection within 1minute after start-up.

When discharge temperature thermistor, fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor or ambient temperature thermistor shorts or opens during compressor running.

When nonvolatile memory data cannot be read properly. (When

the left lamp of OPERATION INDICATOR lamp

of the indoor unit

lights up or flashes 7-time.)

When 14A(MUZ-GA25VA,MUZ-GA25VAH)/ 24A(MUZ-GA35VA, MUZ-GA35VAH) current flows into intelligent power module.

When temperature of discharge temperature thermistor exceeds 116:, compressor stops. Compressor can restart if discharge temperature thermistor reads 100: or less 3 minutes later.

When temperature of fin temperature thermistor on the heat sink exceeds 82:(MUZ-GA25VA,MUZ-GA25VAH)/ 83: (MUZ-GA35VA,MUZ-GA35VAH) or temperature of P.C. board temperature thermistor on the inverter P.C.board exceeds 81:(MUZ-GA25VA,MUZ-GA25VAH)/ 85:(MUZ-GA35VA, MUZ-GA35VAH).

When indoor coil thermistor exceeds 70: in HEAT mode. When the defrost thermistor exceeds 70: in COOL mode.

When current from power outlet exceeds 5.2A(MUZ-GA25VA, MUZ-GA25VAH)/ 6.1A(MUZ-GA35VA,MUZ-GA35VAH), compressor frequency lowers.

When temperature of indoor coil thermistor exceeds 55: in HEAT mode, compressor frequency lowers.

When indoor coil thermistor reads 8: or less in COOL mode, compressor frequency lowers.

When temperature of discharge temperature thermistor exceeds 111:, compressor frequency lowers.

When temperature of discharge temperature thermistor has been 50: or less for 20 minutes.

No.

Symptom

LED indication

Condition

Correspondence

Outdoor unit does not operate

'Outdoor unit stops and restarts 3 minutes later' is repeated

Outdoor unit operates

1-time flash every

2.5 seconds

2-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

5-time flash

2.5 seconds OFF

1-time flash

2.5 seconds OFF

3-time flash

2.5 seconds OFF

4-time flash

2.5 seconds OFF

7-time flash

2.5 seconds OFF

Outdoor power system

Outdoor thermistors

Outdoor control system

Overcurrent protection

Discharge temperature overheat protection

Fin temperature /P.C. board temperature thermistor overheat protection

High pressure protection

Frequency drop by current protection

Frequency drop by high pressure protection

Frequency drop by defrosting in COOL mode

Frequency drop by discharge temperature protection

Low discharge temperature protection

· Check stop valve.

Reconnect connector of compressor.

· Refer to 11-6.A "How to check inverter/ compressor".

· Refer to 11-6.G "Check of outdoor thermistors".

· Check stop valve.

Reconnect connector of compressor.

· Refer to 11-6.A "How to check

inverter/compressor".

Replace inverter P.C. board.

· Check refrigerant circuit and refrigerant amount.

· Refer to 11-6.L "Check of LEV".

· Check around outdoor unit.

· Check outdoor unit air passage.

· Refer to 11-6.I "Check of outdoor

fan motor".

· Check refrigerant circuit and refrigerant amount.

· Check stop valve.

The unit is normal, but check the following.

· Check if indoor filters are clogged.

· Check if refrigerant is short.

· Check if indoor/outdoor unit air

circulation is short cycled.

· Refer to 11-6.L "Check of LEV".

· Check refrigerant circuit and

refrigerant amount.

Inverter P.C. board (Parts side)

LED

Flashing

Refer to 11-6.O "How to check miswiring and serial signal error".

When the communication fails between the indoor and outdoor unit for 3 minutes.

Serial signal

8-time flash

2.5 seconds OFF

Compressor synchronous abnormality

When the waveform of compressor current is distorted.

Reconnect connector of compressor.

· Refer to 11-6.A "How to check

inverter/compressor".

8-time flash

2.5 seconds OFF

PAM protection PAM:

Pulse Amplitude Modulation

When the overcurrent flows into IGBT(Insulated Gate Bipolar transistor : TR821) or when the bus-bar voltage reaches 320V or more, PAM stops and restarts.

This is not malfunction. PAM protection will be activated in the following cases; 1Instantaneous power voltage drop (Short time power failure) 2When the power supply voltage is high.

9-time flash

2.5 seconds OFF

Inverter check mode

When the connector of compressor is disconnected, inverter check mode starts.

Check if the connector of the compressor is correctly connected. Refer to 11-6.A "How to check inverter/ compressor".

10-time flash

2.5 seconds OFF

Outdoor fan motor

6-time flash

2.5 seconds OFF

When outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start-up.

· Refer to 11-6.I "Check of outdoor fan motor".

· Refer to 11-6.N "Check of inverter P.C. board".

12-time flash

2.5 seconds OFF

Each phase current of compressor

When each phase current of compressor cannot be detected normally

· Refer to 11-6.A "How to check inverter/compressor".

13-time flash

2.5 seconds OFF

DC voltage

When DC voltage of inverter cannot be detected normally.

· Refer to 11-6.A "How to check inverter/compressor".

· Check refrigerant circuit and refrigerant amount.

· Refer to 11-6.L "Check of LEV".

· Refer to 11-6.G "Check of

outdoor thermistors".

Refer to 11-2.2. Flow chart of the detailed outdoor unit failure mode recall function.

When outdoor unit is defective.

Outdoor unit (Other abnormality)

14-time flash

2.5 seconds OFF

11-4. Troubleshooting check table

NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.

2. LED is lighted during normal operation.

The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the flashing frequency is “2”.

ON OFF

2.5-second OFF

0.5-second ON

2.5-second OFF

0.5-second ON

Page 38

11-5. Trouble criterion of main parts

Part name FigureCheck method and criterion

Outdoor fan motor(MF) INNER FUSE (Only MUZ-GA25VA/H) 152i : CUT OFF

0 5

R.V. coil(21S4)

Expansion valve coil(LEV)

MUZ-GA35VA MUZ-GA35VAH

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

WHT – BLK

BLK – RED

RED – WHT

Normal

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

Normal

1.26 k" ~ 1.62 k" 1.20 k" ~ 1.55 k"

WHT – RED RED – ORN

YLW – BRN BRN – BLU

Normal

38 " ~ 50 "

Measure the resistance with a tester. (Part temperature : –20˚C ~ 40˚C)

Color of the lead wire

292 " ~ 374 " 236 " ~ 304 "

31 " ~ 41 " 31 " ~ 41 " 31 " ~ 41 "

Measure the resistance between the terminals with a tester. (Part temperature –20˚C ~ 40˚C)

Compressor(MC)

Defrost heater(H)

Measure the resistance with a tester. (Part temperature –20˚C ~ 40˚C)

Normal

333 " ~ 428 "

Normal

1,220 " ~ 1,580 "

Measure the resistance with a tester. (Part temperature –20˚C ~ 40˚C)

MUZ-GA25VA MUZ-GA25VAH

U-V U-W V-W

Normal

1.28 " ~ 1.66 "

1.58 " ~ 2.03"

MUZ-GA35VA MUZ-GA35VAH

MUZ-GA25VA MUZ-GA25VAH

MUZ-GA35VA MUZ-GA35VAH

MUZ-GA25VA MUZ-GA25VAH

MUZ-GA35VA MUZ-GA35VAH

MUZ-GA25VA MUZ-GA25VAH

WHT

RED BLK

WHT

RED BLK

WHT

RED

BLK

FUSE

Solenoid valve coil (21R1)

MUZ-GA25VA-

E1 / E2 /

(Serial No. ~6021350T)

MUZ-GA25VAH- E1 / E2 /

(Serial No. ~7000000T)

MUZ-GA35VA MUZ-GA35VAH

Measure the resistance with a tester.

Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board", the chart of thermistor.

Discharge temperature thermistor (RT62)

Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up.

Defrost thermistor (RT61)

Fin temperature thermistor (RT64)

Ambient temperature thermistor (RT65)

LEV

WHT

RED1 ORN4

YLW5

BRN2

BLU3

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

Page 39

11-6. Troubleshooting flow

When OPERATION INDICATOR lamp flashes 5-time. Outdoor unit does not operate.

How to check inverter/ compressor

Disconnect the connector (CN61) between compressor and the intelligent power module (IPM).

Check the voltage between terminals.

Are the voltages

balanced?

Yes

Check the compressor.

Check of open phase

●With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals.

Output voltage 115V

<< Operation method>> Start cooling or heating operation by pressing EMERGENCY OPERATION

switch on the indoor unit. (Test run operation : refer to 8-3.)

<<Measurement point>>

at 3 points BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W)

See 11-6.B “Check of open phase” .

Check the resistance of the intelligent

power module.

See 11-6.D “Check of compressor” .

w Measure AC voltage between the lead wires at 3 points.

See 11-6.C 'Check of intelligent power module'.

Is the resistance infinite?

No (0~several

Yes

Replace the inverter P.C. board.

Replace the inverter P.C. board and compressor.

Inverter P.C. board (Parts side)

LED

Flashing

NOTE 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of inverter P.C. board flashes 9 times.

Check of intelligent power module

●Measure the resistance between the terminals on the intelligent

power module. <<Measurement point>> at 6 points BLK-WHT, WHT-BLK BLK-RED, RED-BLK WHT-RED, RED-WHT

<<Judgement>> Infinite ["]···········Normal 0~dozens of ······Abnormal (short)

9-time flash

ohmmeter indication

Normal (infinite)

Abnormal (0~dozens of ")

2.5-second OFF

Page 40

Check of compressor

Refer to 11-6.E "Check of compressor winding". Is the compressor normal?

Yes

Refer to 11-6.F "Check of compressor operation time".

Does the compressor operate continuously?

Yes

Check of compressor winding

● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance between the compressor terminals.

<<Measurement point>>

at 3 points BLK-WHT BLK-RED WHT-RED

<<Judgement>>

Refer to 11-5. 0["] ···············Abnormal [short] Infinite["] ·······Abnormal [open] NOTE 1. Be sure to zero the ohmmeter before measurement.

2. Winding resistance for each phase at 20:. Refer to 3.SPECIFICATION.

w Measure the resistance between the lead wires at 3 points.

Is the compressor operation time more than 10 seconds?

Check the refrigerant circuit.

Replace the compressor.

Yes

Replace the compressor.

Check of compressor operation time

●Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current.

<<Operation method>>

Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit. (Test run operation : Refer to 8-3.)

<<Measurement>> Measure the time from the start of outdoor fan running to the stop of

compressor due to over current.

<<Judgement>>

For reference 0~10 seconds·····················Abnormal (compressor short or poor contact) (compressor lock-out) 10 seconds~5 minutes·······Abnormal (refrigerant circuit defect) more than 5 minutes···········Normal

0 second

10 seconds

5 minutes

Outdoor fan starts Abnormal (Compressor winding short or layer short) (Compressor connector poor contact) (Compressor lock-out)

Abnormal (Refrigerant circuit defect, etc.)

Normal

Page 41

When OPERATION INDICATOR lamp flashes 6-time. The thermistors in the outdoor unit are abnormal.

Check of outdoor thermistors

Defrost thermistor RT61

Measure the resistance between CN641 1 and 2.

Discharge temperature thermistor RT62

Measure the resistance between CN641 3 and 4.

Fin temperature thermistor RT64

Measure the resistance between CN642 1 and 2.

Ambient temperature thermistor RT65

Measure the resistance between CN643 1 and 2.

Check of R.V. coil

Disconnect the connectors CN641, CN642 and CN643 from the inverter P.C. board.

(Check the characteristics of each thermistor.)

Replace the inverter

P.C. board.

Does the unit operate 10 minutes or more?

Yes

OK. (Cause is poor contact.)

Is the resistance of thermistor normal? (Refer to 11-7.1.)

Replace the thermistor except RT64. In case that RT64 is abnormal, replace the inverter P.C. board, since RT64 is combined with the inverter P.C. board.

Reconnect the connectors CN641, CN642 and CN643. Turn ON the

Yes

power supply and press EMERGENCY OPERATION switch.

w First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-5. w In case CN721 is not connected or R.V. coil is open, voltage is generated between the

terminal pins of the connector although any signal is not being transmitted to R.V. coil. Check if CN721 is connected.

Unit operates COOL mode even if it is set to HEAT mode.

Disconnect connector (CN61) between the compressor and intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

Is there 230V AC between CN7211 and 2 on the power P.C.board 3 minutes after the power supply is turned ON?

Yes

Replace the 4-way valve.

Unit operates HEAT mode even if it is set to COOL mode.

Disconnect connector (CN61) between the compressor and the intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

Is there 230V AC between CN7211 and 2 on the power P.C. board 3 minutes after the power supply is turned ON?

Replace the 4-way valve.

Power P.C. board (Soldered side)

Yes

Replace the power P.C. board.

CN721

Replace the power P.C. board.

Page 42

Outdoor fan motor does not operate.

Replace the outdoor fan motor.

Does the left lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Is the resistance of fan motor normal?

3 minutes after, is there voltage 230V AC between CN771 2 and 3 on the power P.C. board?

Disconnect the connector CN771 on the power P.C. board. Disconnect the connector (CN61) between compressor and power transistor module. Turn ON the power supply and press the EMERGENCY OPERATION switch.

Yes

Check the resistance of fan motor. (Refer to 11-5.)

Replace the power P.C. board.

Replace the outdoor fan motor.

Check of outdoor fan motor

MUZ-GA25VA MUZ-GA25VAH

Page 43

Outdoor fan motor does not operate.

Disconnect the connector (CN61) between compressor and intelligent power module. Turn ON power supply and press EMERGENCY OPERATION switch.

Check the electric parts in main circuit.

If light up,ok. If flash, refer to 11-4.

Is there voltage 280V ~ 370V DC between DB61 (+) and DB61 (–) on the inverter P.C. board? (Refer to 11-7.1.)

Dose LED on the inverter P.C. board light up or flash? (Refer to 11-7.1.)

Yes

Replace the indoor

electronic control P.C. board.

Yes

Replace the inverter P.C. board.

DB61

280V~370V DC

Inverter P.C. board (Solder side)

Is there voltage 230V AC

between the indoor terminal block S1 and S2?

Rectify indoor/ outdoor connecting wire.

Does the left lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Does the voltage between each terminal repeat 5V and 0V DC by turns?

Does the outdoor fan rotate smoothly?

Check the inverter P.C. board. (Refer to 11-6. N)

Yes

( Fixed to either 5V or 0V DC)

Yes

Rotate the outdoor fan slowly by hand, and measure the voltage of CN931 (Measurement of feedback output). Between 1(+) and 5(-) Between 2(+) and 5(-) Between 3(+) and 5(-)

Is the resistance between each terminal of outdoor fan motor normal? (Refer to 11-5.)

Disconnect CN932 from the inverter P.C. board.

Replace the outdoor fan motor.

CN931

CN932

Inverter P.C. board (Solder side)

Turn ON the power supply.

Check of outdoor fan motor

MUZ-GA35VA MUZ-GA35VAH

Inverter does not operate.

Check of power supply

Page 44

Outdoor unit does not operate at all, or stops immediately due to overcurrent.

● Check other electric parts in the main circuit together in the case that the current-limiting resistor is defective.

Turn ON the power supply and press EMERGENCY OPERATION switch.

Replace the inverter P.C. board or the compressor.

Replace the power P.C. board or the inverter P.C. board.

Does the rush current limiting relay(X64) work properly? (Normally it closes 1 second after outdoor unit power ON.)

Yes

Is the resistance of current-limiting resistor (R64A or R64B) on the power P.C. board normal? (Normal resistance : 5' i5%)

Replace the power P.C.board.

Replace the power P.C. board.

Does LED on the inverter P.C. board light up?

Replace the LEV.

Expansion valve operates in full-opening direction.

Is LEV properly fixed to the expansion valve?

Do you hear the expansion valve "click, click·······"? Do you feel the expansion valve vibrate on touching it ?

Does the resistance of LEV have the characteristics? (Refer to 11-5.)

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1.Pin3(-) Pin1(+)

2.Pin4(-) Pin1(+)

3.Pin5(-) Pin1(+)

4.Pin6(-) Pin1(+) Is there about 3~5V AC between each? NOTE: Measure the voltage by an analog tester.

Yes

Replace the expansion valve.

Yes

Properly fix the LEV to the expansion valve.

Replace the inverter P.C. board.

NOTE : After check of LEV, do the undermentioned operations.

1. Turn OFF the power supply and turn ON it again.

2. Press RESET button on the remote controller.

W1. Regardless of normal or abnormal, a short beep is emitted once as the signal is received.

Turn ON the power supply. <

Preparation of the remote controller

> 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote

controller at the same time, press RESET button. 2 First, release RESET button. And release the other two buttons after all LCD

except the set temperature in operation display

section of the remote controller is displayed after

3 seconds.

Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. W1

Check of current-limiting resistor

When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly.

Heating/Cooling does not work sufficiently.

Check of LEV (Expansion valve)

Page 45

Replace the inverter P.C. board.

Is there 230V AC between CN722 1 and 3 on the power P.C. board? Refer to 11-7.2.

Yes

No problem of the power P.C. board.

Is the voltage between CN726 2(+)-3(-) on the power P.C. board 0V DC? Refer to 11-7.2.

Yes

Replace the power P.C. board.

NOTE: In case both thermistors are more than the above temperature, cool them with cold water etc...

In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5: or less, and let the defrost thermistor continue to read -1: or less.

3 2 1

230V AC

Check the following points before checking electric continuity.

1) Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-7.1.

2) Is the resistance of defrost heater normal? Refer to 11-5.

3) Does the heater protector remain conducted (not open)?

4) Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?

26H

CN726

CN722

Outdoor base gets frozen.

Outdoor fan motor does not operate, or stops immediately after starting up.

Replace the inverter P.C. board.

CN931

CN932

Inverter P.C.board (Solder side)

Check the outdoor fan motor. Refer to11-6.I.

Yes (10-time flash)

Check the LED indication on the inverter P.C. board. Does the LED flash 10-time?

Check the corresponding parts following LED indication. (Refer to 11-4.)

Operate the outdoor unit by starting

EMERGENCY OPERATION.

Check the connection of the connectors (CN931, CN932) of outdoor fan motor. If the connection is poor, make it correct.

Check of defrost heater

Check of inverter P.C. board

MUZ-GA35VA

<MUZ-GA25VAH MUZ-GA35VAH>

MUZ-GA35VAH

Page 46

Check of inverter P.C. board

Outdoor fan motor does not operate, or stops immediately after starting up.

Yes (10-time flash)

Yes

Check the LED indication on the inverter P.C. board. Does the LED flash 10-time?

Is the fuse (F901) blown on the inverter P.C. board?

Replace the inverter P.C. board.

CN931

CN932

Inverter P.C.board (Solder side)

Check the corresponding parts following LED indication. (Refer to 11-4.)

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the connection of the connectors. (CN931, CN932) of outdoor fan motor. If the connection is poor, make it correct.

Check the outdoor fan motor. (Refer to11-6.I.)

MUZ-GA35VA MUZ-GA35VAH

Alternative inverter P.C. board

Page 47

• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch.

Is there rated voltage in the power supply?

Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire?

W1. Mis-wiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. W3.Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C.board is normal, LED blinks 6 times after 3 minutes.

(Lighted or not lighted)

Yes

W2 Be careful to the residual voltage of smoothing capacitor.

Be sure to release the failure-mode recall function after checking.

Yes

Refer to indoor unit service manual.

Inverter P.C.board (Parts side)

LED

Blinking

Turn OFF the power supply.

Turn ON the power supply.

Is there rated voltage between outdoor terminal block S1 and S2?

Does the left lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit>

Press EMERGENCY OPERATION switch once.

Check the power supply.

Turn OFF the power supply. Check once more if the indoor/outdoor connecting wire is not mis-wiring.

Short-circuit outdoor terminal block S2 and S3. W1

Turn ON the power supply.

Check the wiring.

Correct them .

Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3? <Confirmation of serial signal>

Is there rated voltage between indoor terminal block S1 and S2? <Confirmation of power voltage>

Replace the indoor electronic control P.C. board.

Replace the inverter P.C. board or the outdoor electronic control P.C.board. W2

Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, intermediate connection, poor contact to the terminal block?

Replace the indoor/outdoor connecting wire.

Is serial signal error indicated 6 minutes later?

Yes

· Turn OFF inverter-controlled lighting equipment.

· Turn OFF the power supply and then turn ON again.

· Press EMERGENCY OPERATION switch.

· Reinstall either the unit or the light each other away.

· Attach a filter on remote control receiving section of the indoor unit.

Is serial signal error indicated 6 minutes later?

Does the LED on the inverter P.C. board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"?

Indoor unit does not operate.

• When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit doesn’t operate.

How to check mis-wiring and serial signal error (when outdoor unit does not work)

Page 48

Do you hear the operation sound (click sound) of the solenoid valve every 5 seconds?

Disconnect CN923 and measure the voltage between CN923 1 and 2 using tester.

Replace the solenoid valve coil.

Are the cords between CN726, CN727 on the outdoor power P.C. board and CN725 on the outdoor inverter P.C. board firmly connected without disconnection or loose connection?

Yes

Set the failure mode recall function.(Refer to 11-2.)

The solenoid valve is normal.

Check the ambient temperature thermistor (RT65) in the outdoor unit. (Refer to 11-6.G)

Correct the connection.

Replace the solenoid valve.

Trouble of the solenoid valve or solenoid valve coil.

Are the connectors for solenoid valve coil firmly connected without disconnection or loose connection?

Does it repeat to go 0V and 230VAC at 5 second interval?

Correct the connection.

Measure the voltage between CN725 8(+) and 2(GND) on the inverter P.C. board.

Does it repeat to go 0V and 12VDC at 5 second interval?

Measure the resistance of solenoid valve coil. Is the resistance normal ? (Refer to 11-5)

Replace the inverter P.C. board.

Replace the power P.C. board.

When the cool air does not blow out from the indoor unit in Low Outside Temperature Operation, or the condensed water drops from the indoor unit.

Operation check of the solenoid valve.

MUZ-GA25VA- //(Serial No. ~6021350T) MUZ-GA25VAH- //(Serial No. ~7000000T)

E3E2E1

Page 49

Replace or repair the antenna. Replace or repair the coaxial cable.

Yes

Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m?

Is the distance between the TV sets or radios and the indoor unit within 1m, or is the distance between the TV sets or radios and the outdoor unit within 3m?

Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring?

Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close?

Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring). Check the followings before asking for service.

1.Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave)

2.Channel, frequency, broadcast station affected by the electromagnetic noise

3.Channel, frequency, broadcast station unaffected by the electromagnetic noise

4.Layout of ; indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, grounding wire, antennas, wiring from antennas, receiver

5.Electric field intensity of the broadcast station affected by the electromagnetic noise

6.Presence or absence of amplifier such as booster

7.Operation condition of air conditioner when the electromagnetic noise enters in

1)Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise.

2)Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise.

3)After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise.

4)Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise.

Is the unit earthed?

Earth the unit.

Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.

Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit.

Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.

Electromagnetic noise enters into TV sets or radios

Page 50

-20 -10 0 10 20 30 40

100

Temperature(:)

Ambient temperature thermistor(RT65)

Defrost thermistor(RT61)

Temperature(:)

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

100

200

300

400

500

600

700

0 1020304050607080

100

120

140

160

180

200

Temperature(:)

Fin temperature thermistor(RT64)

Resistance(k")

11-7. Test point diagram and voltage.

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

1. Inverter P.C. board

Back side of unit

Output to drive compressor (LDV,LDW,LDU)

Smoothing capacitor (C63C)

FUSE (F801)

Smoothing capacitor (C63B)

Smoothing capacitor (C63A)

Rotational frequency

feedback signal of outdoor fan motor

(CN931)

MUZ-GA35VA,MUZ-GA35VAH

DB61 280V ~ 370V DC

(+)

(-)

Jumper wire for change in defrost setting (JS)

Front side of unit

Connecting wire with power P.C. board (CN725)

230V AC DB61

LEV connector (CN724)

Defrost thermistor/RT61

(CN641)

Discharge temperature

thermistor/RT62

(CN641)

(CN643)

(CN642)

Ambient temperature

thermistor /RT65

Fin temperature

thermistor/RT64

Output to drive outdoor fan motor (CN932)

MUZ-GA35VA MUZ-GA35VAH

}

1(+) 2(+) 3(+)

45V 5GND

LED monitor lamp

door communication

(CN601)

Connector for indoor/out-

Page 51

11-7. Test point diagram and voltage

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

1. Inverter P.C. board (Alternative)

Back side of unit

DB61 280V ~ 370V DC

(+)

(-)

Output to drive compressor (LDW, LDV, LDU)

230V AC DB61

Smoothing capacitor (C63C)

Smoothing capacitor (C63B)

Smoothing capacitor (C63A)

FUSE(F801) 250V 3.15A

FUSE(F901) 250V 3.15A

LED monitor lamp

fan motor CN931)

1(+) 2(+) 3(+) 45V 5GND

MUZ-GA35VA,MUZ-GA35VAH

Rotational frequency

feedback signal of outdoor

Jumper wire for change in defrost setting (JS)

Front side of unit

Fin temperature thermistor(RT64)

200 180 160 140 120

100

80 60

Resistance(k")

40 20

0 1020304050607080

Temperature(:)

Connecting wire with power P.C. board (CN725)

Defrost thermistor(RT61) Ambient temperature thermistor(RT65)

100

90 80 70 60 50 40 30

Resistance(k")

20 10

-20 -10 0 10 20 30 40

LEV

(CN641)

connector (CN724)

Temperature(:)

Discharge temperature

thermistor/RT62

(CN641)

Defrost thermistor/RT61

(CN643)

700

600

500

400

300

200

Resistance(k")

100

Ambient temperature

thermistor /RT65

Fin temperature

thermistor/RT64

(CN642)

Output to drive outdoor fan motor

(CN932)

}

MUZ-GA35VA MUZ-GA35V AH

Connector for indoor/ outdoor communication (CN601)

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

Temperature(:)

Page 52

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

2. Power P.C. board

Back side of unit

MUZ-GA25VA- //(Serial No. ~6021350T) MUZ-GA25VAH- //(Serial No. ~7000000T)

Solenoid valve coil (CN923) 230V AC

E3E2E1

Varistor (NR63)

Varistor (NR62)

Varistor (NR64)

Front side of unit

230V AC

MUZ-GA25VA MUZ-GA25V AH

Output to drive outdoor Fan motor(CN771) 230V AC

R.V.coil(CN721) 230V AC

Connecting wire with inverter P.C.board (CN726)

FUSE(F71) 250V 3.15A

230V AC

Heater connector (CN722)

}

MUZ-GA25VAH MUZ-GA35VAH

Page 53

DISASSEMBLY INSTRUCTIONS

<"Terminal with locking mechanism" Detaching points>

The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.

(1) Slide the sleeve and check if there is a locking lever or not.

Sleeve

1Slide the sleeve. 2Pull the terminal while

Locking lever

pushing the locking lever.

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

OPERATING PROCEDURE

1. Removing the cabinet

(1) Remove the screw fixing the service panel. (See Photo 2.) (2) Pull down the service panel and remove it. (See Photo 2.) (3)

Disconnect the power supply and indoor/outdoor connecting wire. (4) Remove the screws fixing the top panel. (See Photo 1.) (5) Remove the top panel. (See Photo 1.) (6) Remove the screws fixing the cabinet. (See Photo 1, 2.) (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel. (See Photo 1.)

(2) The terminal with this connector has the locking mechanism.

1Hold the sleeve, and pull out the terminal slowly.

Connector

PHOTOS

Photo 1

Screws of the top panel

Screws of the cabinet

Screws of the top panel

Photo 2

Screws of the cabinet

Screw of the

service panel

Direction to remove

Hooks

Screws of the cabinet

Back panel

Service

panel

Page 54

OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, inverter P.C. board and power P.C. board

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.)

(3) Disconnect the ground wires (See Photo 3.), the lead wire

to the reactor and the following connectors; <Power P.C. board> CN721 (4-way valve) CN771 (Fan motor) MUZ-GA25VA/GA25VAH CN722 (Defrost heater) MUZ-GA25/GA35VAH CN923 (Solenoid valve coil)

E3E2E1

MUZ-GA25VA-

MUZ-GA25VAH<Inverter P.C. board> CN931,CN932 (Fan motor) MUZ-GA35VA/GA35VAH CN641 (Defrost thermistor and discharge temperature

thermistor) CN643 (Ambient temperature thermistor) CN724 (LEV) MUZ-GA35VA/GA35VAH

(4) Remove the compressor connector (CN61). (5) Remove the screws fixing the relay panel. (See Photo 3.) (6) Remove the inverter assembly. (See Photo 4.) (7) Disconnect all connectors and lead wires on the inverter

P.C. board. (See Photo 4.)

(8) Remove the inverter P.C. board from the inverter assembly. (9) Remove the screw fixing the power P.C. board. (See Photo

4.)

(10)

Disconnect all connectors and lead wires on the power P.C.

board.

(11)

Remove the power P.C. board from the inverter assembly.

//(Serial No. ~6021350T)

E3E2E1

//(Serial No. ~7000000T)

Photo 3

Photo 4

Heat sink

Screws of the relay panel

(Inverter assembly)

Inverter P.C. board

Screws of

the ground wires

Power P.C. board

3. Removing R.V. coil

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Remove the R.V. coil. (See Photo 5.)

4. Removing the discharge temperature thermistor and defrost thermistor

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Pull out the discharge temperature thermistor from its

holder. (See Photo 5.) (5) Pull out the defrost thermistor from its holder. (See Photo 6.)

Photo 5

Screw of the power P.C. board

R.V. coil

Discharge temperature thermistor

Page 55

OPERATING PROCEDURE

PHOTOS

5. Removing outdoor fan motor

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Disconnect the connectors for outdoor fan motor. (4) Remove the propeller nut. (5) Remove the propeller. (See Photo 7.) (6) Remove the screws fixing the fan motor. (See Photo 7.) (7) Remove the fan motor.

6. Removing the compressor and 4-way valve

(1) Remove the top panel, cabinet and service panel.

(Refer to 1.)

(2) Disconnect the power supply and indoor/outdoor

connecting wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm

(5) Detach the welded part of the suction and the discharge

pipe connected with compressor. (6) Remove the nuts of compressor legs. (7) Remove the compressor. (8) Detach the welded part of pipes connected with 4-way

valve. (See Photo 8.)

(0 MPa).

Photo 6

Defrost thermistor

Photo 7

Screws of the outdoor fan motor

Propeller

Photo 8

Welded parts of 4-way valve

Page 56

PARTS LIST (non-RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

19 1723

1416

11 12

Page 57

PARTS LIST (non-RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

Part numbers that are circled are not shown in the illustration.

Part No.

No.

E02 927 232

E02 927 521

E02 931 501

E02 927 501 E02 927 290

E02 928 290 E02 928 900

E02 927 900 E02 065 506

E02 927 661

E02 927 662

E02 927 245

E02 927 233

E02 927 640

E02 927 493

E02 927 961

E02 931 961 E02 928 079

E02 928 525

E02 928 523

E02 838 523

E02 927 293

E02 928 293 E02 899 515

E02 927 515 E02 927 297

E02 927 630

E02 931 301

E02 927 301 E02 840 526

E02 840 381

E02 927 937 E02 096 936

E02 156 936 E02 096 642

E02 932 490

E02 931 492

Part Name

CABINET GRILLE PROPELLER PROPELLER BASE BASE COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET STOP VALVE (GAS) STOP VALVE (LIQUID) SERVICE PANEL BACK PANEL EXPANSION VALVE EXPANSION VALVE COIL 4-WAY VALVE 4-WAY VALVE THERMO HOLDER CONDENSER WIRE NET CONDENSER NET CONDENSER NET SEPARATOR SEPARATOR MOTOR SUPPORT MOTOR SUPPORT TOP PANEL OUTDOOR HEAT EXCHANGER OUTDOOR FAN MOTOR OUTDOOR FAN MOTOR DEFROST HEATER HEATER PROTECTOR CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE SOLENOID VALVE COIL SOLENOID VALVE

Symbol

in Wiring

Diagram

MC MC

LEV

MF MF

26H

21R1

MUZ-

GA25VA-

Q'ty/unit

MUZ-

GA25VAH-

MUZ-

GA35VA-

MUZ-

GA35VAH-

E1E2 E2E2 E2

Remarks

KNB065FDTH KNB073FDVH 3RUBBERS/SET

{9.52 {6.35

RA6V21RC0J50-

{3.0✕{2.0✕240 {3.0✕{1.4✕800 {3.0✕{1.4✕500

Page 58

REACTOR POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD R.V. COIL R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE THERMISTOR FUSE HOLDER FUSE TERMINAL BLOCK TERMINAL BLOCK INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD FUSE VARISTOR VARISTOR

E02 838 337 E02 927 444 E02 931 444 E02 928 444 E02 932 444 E02 927 490 E02 928 490 E02 927 306 E02 927 308 E02 735 241 E02 735 382 E02 573 375 E02 927 374 E02 928 451 E02 932 451 E02 B40 451 E02 B41 451 E02 A77 451 E02 127 382 E02 661 385 E02 927 385

3 4

5 6 7 8 9

11 12 13

Symbol

in Wiring

Diagram

Q'ty/unit

DEFROST, DISCHARGE

T20AL250V 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 T3.15AL250V

Remarks

Part No.

No.

Part Name

L61

21S4 21S4

RT61,RT62

RT65

F61 TB1 TB2

F71,F801,F901

NR62,NR63,NR64

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1

1 1 1

1 1

1 1 1 1 1 1

1 1 1

1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1

1 1 1 1

1 1 1 1 1 1 1

1 1 1

1 1

1 1 1 1 1 1

1 1 1

1 1 1 1 1 1

1 1 1

MUZ-

GA25VA-

MUZ-

GA25VAH-

MUZ-

GA35VA-

MUZ-

GA35VAH-

E1E2 E2 E2 E2

PARTS LIST (non-RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

13-2. OUTDOOR UNIT ELECTRICAL PARTS

1 4

Part numbers that are circled are not shown in the illustration.

Page 59

Symbol

in Wiring

Diagram

Q'ty/unit

MUZ-

GA25VA-

Remarks

Parts No. Parts Name

MUZ-

GA35VA-

MUZ-

GA25VA-

MUZ-

GA35VA-

E02 838 704

DRAIN SOCKET

No.

1111

PARTS LIST (non-RoHS compliant)

MUZ-GA25VA MUZ-GA35VA 13-3. DRAIN SOCKET

MUZ-GA25VA - MUZ-GA35VA MUZ-GA25VAH - MUZ-GA35VAH -

13-4. QUICK CLEAN KIT

●You can clean the surface of the heat exchanger and line flow fan if you attach QUICK CLEAN KIT to your vacuum cleaner.

Parts No. Parts Name

No.

E02 927 113

E02 927 115

E02 927 112

BRUSH NOZZLE UNIVERSAL ADAPTER

E1E1

heat exchanger

Symbol

in Wiring

Diagram

MUZ-

GA25VA-

1 1 1

Q'ty/unit

MUZ-

GA25VAH-

1 1 1

MUZ-

GA35VA-

1 1 1

MUZ-

GA35VAH-

1 1 1

Remarks

NOTE : Quick clean kit has been removed from model.

Page 60

RoHS PARTS LIST (RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

19 1723

1416

11 12

Page 61

RoHS PARTS LIST (RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS

Part numbers that are circled are not shown in the illustration.

No.

1 2

5 6

7 8

9 10 11 12

13 14

15 16 17

19 20

21 22 23

26 27

Part No.

RoHS

E12 927 232

E12 927 521

E12 931 501

E12 927 501

E12 927 290

E12 928 290

E12 928 900

E12 927 900

E12 065 506

E12 927 661

E12 927 662

E12 927 245

E12 927 233

E12 927 640

E12 927 493

E12 927 961

E12 931 961

E12 928 079

E12 928 525

E12 928 523

E12 838 523

E12 927 293

E12 928 293

E12 899 515

E12 927 515

E12 927 297

E12 927 630

E12 931 301

E12 927 301

E12 840 526

E12 840 381

E12 927 937

E12 096 936

E12 156 936

E12 642 936

E12 096 642

E12 B45 642 E12 932 490

G G

E12 931 492

Symbol

Part Name

in Wiring

Diagram

LEV

26H

21R1

MC MC

MF MF

MUZ-

GA25VA-

1 1

1 1 1

3 1 1 1 1

1 1

1 1 1

Q'ty/unit

MUZ-

GA25VAH-

1 1

GA35VA-

1 1 1

1 1

3 1 1 1 1

1 1 1 1

1 1

1 1 1

1 1

MUZ-

1 1

1 3 1 1 1 1 1 1 1

1 1

1 1 1

MUZ-

GA35VAH-

E2E3 E4 E3 E4

1 1

1 3 1 1 1 1 1 1 1

1 1 1

1 1 1 1

Remarks

KNB065FDTH KNB073FDVH 3RUBBERS/SET

{9.52 {6.35

RA6V21RC0J50-

{3.0✕{2.0✕240 {3.0✕{1.4✕800 {3.0✕{1.4✕500 {3.0✕{1.4✕400

Page 62

REACTOR POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD POWER P.C. BOARD R.V. COIL R.V. COIL THERMISTOR SET AMBIENT TEMPERATURE THERMISTOR FUSE HOLDER FUSE TERMINAL BLOCK TERMINAL BLOCK INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD INVERTER P.C. BOARD FUSE VARISTOR VARISTOR

E12 838 337 E12 927 444 E12 931 444 E12 928 444 E12 C01 444 E12 932 444 E12 C02 444 E12 927 490 E12 928 490 E12 927 306 E12 927 308 E12 735 241 E12 735 382 E12 573 375 E12 927 374 E12 A77 451 E12 A79 451 E12 B40 451 E12 B41 451 E12 127 382 E12 661 385 E12 927 385

3 4

5 6 7 8 9

11 12 13

G G G G G G G G G G G G G G G G G G G G G G

Symbol

in Wiring

Diagram

Q'ty/unit

DEFROST, DISCHARGE

T20AL250V 3P 3P Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 Including heat sink and RT64 T3.15AL250V

Remarks

Part No.

No.

Part Name

L61

21S4 21S4

RT61,RT62

RT65

F61 TB1 TB2

F71,F801,F901 NR62,NR63,NR64

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1

1 1 1

1 1

1 1 1 1 1 1

1 1 1

1 1 1 1 1 1

1 1 1 1

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1 1

1 1 1

1 1 1 1 1 1 1

1 1 1

MUZ-

GA25VA-

MUZ-

GA25VAH-

MUZ-

GA35VA-

MUZ-

GA35VAH-

E2E3 E3E4 E4

RoHS

RoHS PARTS LIST (RoHS compliant)

MUZ-GA25VA MUZ-GA35VA MUZ-GA25VAH MUZ-GA35VAH

14-2. OUTDOOR UNIT ELECTRICAL PARTS

1 4

Part numbers that are circled are not shown in the illustration.

Page 63

Symbol

in Wiring

Diagram

Q'ty/unit

MUZ-GA25VA-

Remarks

Parts No. Parts Name

MUZ-

GA35VA-

E2E3 E4

E12 838 704

DRAIN SOCKET

No.

111 1

RoHS

RoHS PARTS LIST (RoHS compliant)

MUZ-GA25VA MUZ-GA35VA 14-3. DRAIN SOCKET

Page 64

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

Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No. OB379 REVISED EDITION-D 6 Distributed in Feb. 2007. No. OB379 REVISED EDITION-C 6 Distributed in May 2006. No. OB379 REVISED EDITION-B 6 Distributed in Jan. 2006. No. OB379 REVISED EDITION-A 6 Distributed in Jan. 2005. No. OB379 6 Made in Japan

New publication, effective May 2007 Specifications subject to change without notice.

Mitsubishi OB379D Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual