Mitsubishi Electric MUZ-GA25VA, MUZ-GA25VAH, MUZ-GA35VA, MUZ-GA35VAH Service Manual

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

HFC

utilized

R410A

Wireless type Models

No. OB379

MUZ-GA25VA MUZ-GA35VA -

E1

MUZ-GA25VAH MUZ-GA35VAH -

Indication of model name

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

E1

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················6

3. SPECIFICATION·················································7

4. NOISE CRITERIA CURVES·······························9

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

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

E1

7. REFRIGERANT SYSTEM DIAGRAM··············15

E1

8. PERFORMANCE CURVES······························17

E1

9. ACTUA TOR CONTROL····································25

10. SERVICE FUNCTIONS·····································26

11. TROUBLESHOOTING······································26

12. DISASSEMBLY INSTRUCTIONS·····················45

13. PARTS LIST······················································48

NOTE:

This service manual describes technical data of the outdoor units.

•As for indoor units MSZ-GA22VA- , MSZ-GA25VA- and MSZ-GA35VA- , refer to the

service manual OB378.

E1E1E1

1

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 -

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).

E1E1

2

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

0

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

A1

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 Destruction Parameter : based on CFC-11 w2 :Global Warmth Parameter : based on CO

2

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 each, 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

3

[Gauge])

-30 -20 -10 0 10 20

30

40 50 60

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

(MPa [Gauge])

R410A R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(:)

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

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

No

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

mm

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

international system of units(SI unit system).

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.

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.

2.Refrigerant piping

4

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”.

Pipe diameter

mm

6.35

9.52

12.7

Dimension of flare nut

R410A

17 22 26

R22

17 22 24

3.Refrigerant 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, ability 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.

Union

Stop valve

Indoor unit

Refrigerant gas cylinder operating valve

Liquid pipe Gas pipe

Service port

Outdoor unit

Gauge manifold valve (for R410A)

Charge hose (for R410A)

Refrigerant gas cylinder for R410A with siphon

Refrigerant (liquid)

Electronic scale for refrigerant charging

5

1

Drain socket

1

2

Quick clean kit

1

MUZ-GA25VA -

E1

MUZ-GA35VA -

E1

– 1

MUZ-GA25VAH -

E1

MUZ-GA35VAH -

E1

2

PART NAMES AND FUNCTIONS

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

OUTDOOR UNIT

(back and side)

ACCESSORIES

E1E1

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

6

3

SPECIFICATION

Outdoor model

Function

Power supply

2.5 (0.9-3.0)

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

Capacity

Starting current ✽1 Compressor motor current ✽1 Fan motor current ✽1

Electrical

data

Coefficient of performance(C.O.P)

kW

r/h

K /h

A A A

✽1 Model Output Winding resistance(at 20:)

Compressor

W

"

U-V 1.88

Model Winding

Fan

motor

resistance(at 20:) Dimensions WOHOD

Weight Sound level ✽1 Fan speed(HighW/LowW, HighW/Med.W/LowW)

"

mm

kg

dB(A)

rpm Fan speed regulator Refrigerant filling capacity(R410A) Refrigeration oil (Model)

Special

remarks

Thermistor RT61 Thermistor RT62(at 100:) Thermistor RT64(at 50:) Thermistor RT65(at 25:)

(at 0:)

kg cc

k" k" k" k"

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

w Reference value

MUZ-GA25VA MUZ-GA25VAH -

Cooling

Heating

Single phase

230V,50Hz

3.2 (0.9-4.5)

1.4 1,890

3.6

2.71

0.24

3.91 KNB065FDTH

500

U-W 1.88

V-W 1.88

RA6V21-AB

WHT-BLK 347

BLK-RED 281 800o550o285

31 46

810

1

0.85

320 (NEO22)

32.6

13.4 17 10

E1

—

3.11

4.21

E1

MUZ-GA35VA MUZ-GA35VAH -

Cooling

Single phase

230V,50Hz

3.5 (1.0-3.9)

2.0

2,058

5.0

4.44

0.31

3.24 KNB073FDVH

550

U-V 1.53

V-W 1.53

RC0J50-AL WHT-BLK 37.5 BLK-RED 37.5

RED-WHT 37.5

800o550o285

33

47

810W/750

W

2

0.90

320 (NEO22)

32.6

13.4 17 10

E1

Heating

4.0 (0.9-5.0) —

2,178

4.20

0.35

3.79

U-W 1.53

48

880W/810W/650

3

W

7

OUTDOOR UNIT

Model

Item

Current transformer Current transformer Smoothing capacitor Diode module Fuse Fuse 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 Outdoor fan motor thermal fuse

MUZ-GA25VA

-

E1

(CT)

(CT761, CT781)

(

C63A, C63B, C63C

)

(DB61, DB65)

(F61)

(F71, F801)

(H)

(IPM)

(LEV)

(L61)

(R61)

(R831)

(

R64A, R64B

)

(TB1,TB2)

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

(21S4)

(SR61)

(21R1)

(26H)

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

ETA19Z59BZ

ETQ19Z71AY

620+ 420V

D25XB60 250V 20A

250V 3.15A

PS21244-A-203

10A 23.0mH

25m" 5W

10" 5W

3P

G5NB-1a

G4A-1A-PS

—

230V 130W

G5NB-1a

Open 45:

—

230V 130W

G5NB-1a

Open 45:

45m" 5W (1 element)

CAM-MD12ME 12VDC

—

STF-01AJ503

— —

—

G5NB-1a

SHF-4-10W5

G3MC-202PL

FQ-208-RK

Open 152:

Specifications and rating conditions of main electric parts

8

4

90

80

70

60

50

40

30

20

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:

NOISE CRITERIA CURVES

MUZ-GA25VA MUZ-GA25VAH -

E1

MUZ-GA35VA MUZ-GA35VAH -

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

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

90

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

10

63 125 250 500 1000 2000 4000 8000

E1

SPL(dB(A))

High

Med.

FUNCTION

COOLING

HEATING

FAN SPEED

BAND CENTER FREQUENCIES, Hz

LINE 47 48

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

OUTDOORUNIT

1m

MICROPHONE

9

5

10

69

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

23

Service panel

Service port

285

344.5

44

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

40

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 -

OUTDOOR UNIT

E1E1

Unit: mm

10

6

WIRING DIAGRAM

MUZ-GA25VA -

OUTDOOR UNIT

E1

MODEL WIRING DIAGRAM

W

REDRED

2

WHT

LD-V

V

F801

MC

3

N

C63C

C63B

C63A

CN61

LD-W

W

R61

V

WHT

CT781

IPM

T801

BLK

U

BLK

LD-U

U

P

1

CT761

+ + +

IC801

CN642

21 3 4

CN641

21 21

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

NAME

BLK

L61

BLK

TB2

DB61

TAB63

R64A

R64B

L63

L62

TAB61

WHT

F61

WHT

230V~

X64

TAB62

BLU

S2S1S3

LD70

RED

V 12-24

LD69

TB800

BLK

BLU

21S4

2

1

CN721

3 4

CT

CONNECTING TO INDDOR UNIT

CN771

X63

C65

F71

SR61

NR63NR64

DSA61

GRN

TB1

L

N

CIRCUIT BREAKER

~/N

DB65

MF

2

321

2

CN923

X69

LDE

GRN/YLW

PE

POWER

SUPPLY

230V 50Hz

21R1

1

CN726 CN725

6 4

CN727

WHITE

BLU

POWER P.C. BOARD

RED

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

SOLID STATE RELAY

R61,R831

R64A,R64B

SYMBOL

SR61

NAME

REACTOR

CMC COIL

COMPRESSOR

SYMBOL

L61

L62,L63MCMF

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

TB1,TB2

TR821

T801

X63,X64,X69

21S4

OUTDOOR FAN MOTOR(INNER FUSE)

VARISTOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMISTOR

FIN TEMPERATURE THERMISTOR

NR63,NR64

RT61

RT62

RT64

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

INTELLIGENT POWER DEVICE

SOLENOID VALVE COIL

21R1

AMBIENT TEMPERATURE THERMISTOR

RT65

INTELLIGENT POWER MODULE

11

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

C65

DB61,DB65

DSA61

F61

F71,F801

IC801

IPM

MUZ-GA25VAH -

PE

CIRCUIT BREAKER

~/N

230V 50Hz

POWER

SUPPLY

230V~

12-24

V

TO INDDOR UNIT

CONNECTING

RED

BLU

WHITE

GRN/YLW

TB1

L

N

R64A

TB2

S3

S1

S2

RED

BLU

WHT

R64B

WHT

H

26H

+ + +

CT

3 4

NR64 NR63

GRN

DSA61

LDE

LDY

GRN

X69

1

2

CN771

21R1

CN923

2

1

46

CN725CN727 CN726

C65

SR61

312

MF

312

X66

CN722

1

2

YLW

BLK BLK

BLKBLK

BLK

1

2

BLK

RED

21

2 31

CN601

4 5

43 1 21 2

TB800

RT65 RT64RT62RT61

POWER P.C. BOARD

CN643

CN641

INVERTER P.C. BOARD

CN642

21S4

X63

CN721

1

2

IC801

F801

C63C

LD-V

LD-W

LD-U

3

1

WHT

BLK

RED RED

V

BLK

WHT

W

U

MC

CN61

IPM

CT781

CT761

2

R61

N

U

V

W

P

L61

BLK

R831

TAB63

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

F61

TAB61

L62

X64

F71

TAB62

BLK

BLU

OUTDOOR UNIT

E1

MODEL WIRING DIAGRAM

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

NAME

CURRENT-LIMITING RESISTOR

SOLID STATE RELAY

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

SOLENOID VALVE COIL

HEATER PROTECTOR

SYMBOL

R64A,R64B

SR61

TB1,TB2

TR821

T801

X63,X64,X66,X69

21S4

21R1

26H

NAME

REACTOR

OUTDOOR FAN MOTOR(INNER FUSE)

CMC COIL

VARISTOR

COMPRESSOR

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMISTOR

FIN TEMPERATURE THERMISTOR

AMBIENT TEMPERATURE THERMISTOR

CURRENT-DETECTING RESISTOR

12

SYMBOL

L61

L62,L63MCMF

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

OUTDOOR FAN CAPACITOR

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

C65

NR63,NR64

RT61

RT62

RT64

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

FUSE (T3.15AL250V)

DEFROST HEATER

DB61,DB65

DSA61

F61

F71,F801HIC801

RT65

R61,R831

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

IPM

MUZ-GA35VA -

E1

MODEL WIRING DIAGRAM

OUTDOOR UNIT

BLK

L61

BLK

U

BLK

LD-U

U

DB61

TAB63

R64A

R64B

W

1

2

WHT

LD-V

CT761

V

P

F801

+ + +

MC

3

RED RED

N

C63C

C63B

C63A

LD70

X64

CN61

LD-W

W

R61

BLK

3 4

V

WHT

CT781

IPM

T801

LD69

BLU

LEV

6

CN724

IC801

TB800

21S4

1

X63

CN642

CN641

CN643

INVERTER P.C. BOARD

TR821

2

CN721

DB65

6

CN727CN72

R831

CN931 CN932

LDY

CN601

CN725

4

the indoor unit electric wiring diagram for

servicing.

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

3. Symbols below indicate.

/: Terminal block, : Connector

43 1 21 2

21

RT65 RT64RT62RT61

2

5 1 3

5

3

31

2 4

1

GRN

4 5 2 31

6

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

MF

NAME

CURRENT-DETECTING RESISTOR

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SWITCHING POWER TRANSISTOR

TRANSFORMER

SYMBOL

R61,R831

R64A,R64B

TB1,TB2

TR821

T801

RELAY

R.V. COIL

X63,X64

21S4

L63

L62

TAB61

WHT

F61

WHT

TB2

S1

230V~

BLU

S2

TAB62

RED

S3

V 12-24

CT

F71

NR63

DSA61

NR64

GRN

TB1

L

N

CONNECTING TO INDDOR UNIT

CIRCUIT BREAKER

~/N

230V 50Hz

LDE

GRN/YLW

PE

POWER

SUPPLY

13

NAME

POWER P.C. BOARD

SYMBOL

WHITE

BLU

RED

NAME

SYMBOL

REACTOR

CMC COIL

COMPRESSOR

OUTDOOR FAN MOTOR

VARISTOR

L61

L62,L63MCMF

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

CT,CT761,CT781

C63A,C63B,C63C

NR63,NR64

DIODE MODULE

SURGE ABSORBER

FUSE (T20AL250V)

DB61,DB65

DSA61

F61

DISCHARGE TEMPERATURE THERMISTOR

FIN TEMPERATURE THERMISTOR

DEFROST THERMISTOR

RT61

FUSE (T3.15AL250V)

F71,F801

AMBIENT TEMPERATURE THERMISTOR

RT62

RT64

RT65

INTELLIGENT POWER DEVICE

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

IC801

IPM

LEV

MUZ-GA35VAH -

PE

CIRCUIT BREAKER

~/N

230V 50Hz

POWER

SUPPLY

230V~

TO INDDOR UNIT

CONNECTING

RED

BLU

WHITE

GRN/YLW

TB1

L

N

R64A

TB2

S3

S1

S2

RED

BLU

WHT

R64B

WHT

H

26H

+ + +

CT

4

3

NR64 NR63

GRN

DSA61

LDE

2 31 4 5

CN601

LDY

GRN

MF

RT65 RT64RT62RT61

31 2 4

5

21

3

2

1

2 4

5

1

3

CN931 CN932

43 1 21 2

CN643

CN641

CN642

312

X66

CN722

1

2

YLW

BLK BLK

BLKBLK

BLK

1

2

BLK

RED

6

4

CN727CN72

6

CN725

TB800

POWER P.C. BOARD

INVERTER P.C. BOARD

21S4

X63

CN721

1

2

IC801

F801

C63C

LD-V

LD-W

LD-U

3

1

WHT

BLK

RED RED

V

BLK

WHT

W

U

MC

CN61

IPM

CT781

CT761

2

CN724

LEV

6

R61

N

U

V

W

P

L61

BLK

R831

TAB63

LD69

DB65

DB61

LD70

TR821

C63B

C63A

BLK

T801

L63

F61

TAB61

L62

X64

F71

TAB62

BLK

BLU

12-24

V

OUTDOOR UNIT

E1

MODEL WIRING DIAGRAM

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

NAME

CURRENT-LIMITING RESISTOR

TERMINAL BLOCK

SYMBOL

R64A,R64B

TB1,TB2

SWITCHING POWER TRANSISTOR

TRANSFORMER

RELAY

R.V. COIL

TR821

T801

X63,X64,X66

21S4

HEATER PROTECTOR

26H

14

NAME

REACTOR

CMC COIL

COMPRESSOR

SYMBOL

L61

L62,L63MCMF

NAME

CURRENT TRANSFORMER

SMOOTHING CAPACITOR

DIODE MODULE

SYMBOL

CT,CT761,CT781

C63A,C63B,C63C

DB61,DB65

DISCHARGE TEMPERATURE THERMISTOR

OUTDOOR FAN MOTOR

VARISTOR

NR63,NR64

SURGE ABSORBER

FUSE (T20AL250V)

DSA61

F61

FIN TEMPERATURE THERMISTOR

DEFROST THERMISTOR

RT61

RT62

RT64

FUSE (T3.15AL250V)

DEFROST HEATER

INTELLIGENT POWER DEVICE

F71,F801HIC801

AMBIENT TEMPERATURE THERMISTOR

CURRENT-DETECTING RESISTOR

RT65

R61,R831

INTELLIGENT POWER MODULE

EXPANSION VALVE COIL

IPM

LEV

7

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperatuer thermistor RT62

Flared connection

Stop valve (with strainar)

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 temperatuer thermistor RT62

Flared connection

Stop valve (with strainar)

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)

Expansion valve

R.V. coil heating ON cooling OFF

Strainer #100

Muffler

Ambient temperature thermistor RT65

Muffler

REFRIGERANT SYSTEM DIAGRAM

MUZ-GA25VA MUZ-GA25VAH -

OUTDOOR UNIT

E1

Unit:mm

MUZ-GA35VA MUZ-GA35VAH -

E1

OUTDOOR UNIT

15

Unit:mm

Outdoor unit

precharged

850

900

14m

270

7m

0

6m

0

5m

0

11m

180

Model

Refrigerant piping length (one way)

Calculation : Xg=30g/mo(Refrigerant piping length(m) - 5)

8m

90

9m

120

10m

150

12m

210

13m

240

15m

300

20m

450

MUZ-GA25VA - E1 MUZ-GA25VAH -

E1

MUZ-GA35VA - E1 MUZ-GA35VAH - E1

Refrigerant Piping Max. length A

w Height difference should be within 12m regardless of which unit, indoor or outdoor position is high.

w Max. Height

difference 12m

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH

Refrigerant piping

Max. length : m

A

20

Indoor unit

Gas 0.43

Liquid 0.5

Gas

9.52

Liquid

6.35

Outdoor unit

Piping size O.D : mm Length of connecting pipe : m

Model

MUZ-GA25VA -

E1

MUZ-GA25VAH -

E1

MUZ-GA35VA -

E1

MUZ-GA35VAH -

E1

MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

16

Mitsubishi Electric MUZ-GA25VA, MUZ-GA25VAH, MUZ-GA35VA, MUZ-GA35VAH Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual