Mitsubishi MUZ-GC25VA-E1, MUZ-GC25VAH-E1, MUZ-GC35VA-E1, MUZ-GC35VAH-E1 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

HFC

utilized

R410A

OUTDOOR UNIT

SERVICE MANUAL

Wireless type Models

No. OBH469

MUZ-GC25VA -

E1

MUZ-GC25VAH MUZ-GC35VA -

E1

MUZ-GC35VAH -

MUZ-GC25VA MUZ-GC25VAH

E1

Indoor unit service manual MSZ-GC•VA Series (OBH468)

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES·······························5

5. OUTLINES AND DIMENSIONS·························6

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM··············11

8. PERFORMANCE CURVES······························13

9. ACTUA TOR CONTROL····································22

10. SERVICE FUNCTIONS·····································23

11. TROUBLESHOOTING ······································23

12. DISASSEMBLY INSTRUCTIONS·····················42

PARTS CATALOG (OBB469)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

1

Drain socket

MUZ-GC25VA

1

MUZ-GC35VA

1

TECHNICAL CHANGES

MUZ-GA25VA - ➔ MUZ-GC25VA MUZ-GA25VAH - ➔ MUZ-GC25VAH MUZ-GA35VA - ➔ MUZ-GC35VA MUZ-GA35VAH - ➔ MUZ-GC35VAH -

1.Outdoor model has been changed.

E1E3

2

PART NAMES AND FUNCTIONS

MUZ-GC25VA MUZ-GC25VAH

ACCESSORIES

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

MUZ-GC35VA MUZ-GC35VAH

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

2

3

4.2

0.24

KNB065FDTH(C)

500

RA6V21-AB or BB

684o540o255

26

1

0.75

Cooling

2.5 (0.9-3.0)

1.4

1,812

3.6

665

80

3.14

3.76

46

810

Heating

3.2 (0.9-4.5) —

1,788

4.2

835

86

3.74

3.83

47

800

MUZ-GC25VA

5.0

KNB073FEDH or FGDH

550

RC0J50-AM

800o550o285

31

0.85

Cooling

3.5 (1.0-3.9)

2.0

2,010

5.0

1,075

93

4.47

0.31

3.26

47

810/750

2

Heating

4.0 (0.9-5.0) —

2,082

4.9

1,055

94

4.33

0.35

3.79

48

880/810/650

3

Outdoor model

Function

Power supply

Capacity Rated frequency(Min.-Max.) Dehumidification Air flow ✽1 Power outlet Running current ✽1

(Total)

Power input ✽1

(Total)

Power factor ✽1

(Total)

Starting current ✽1

(Total) Compressor motor current ✽1 Fan motor current ✽1

Model

Output Fan motor Model Dimensions WOHOD Weight Sound level ✽1 Fan speed Fan speed regulator Refrigerant filling capacity(R410A) Refrigeration oil (Model)

kW

r/h

K /h

A

A W %

A

✽1

(Total)

W

mm

kg

dB(A)

rpm

kg cc

Compressor

Special

remarks

Coefficient of performance(C.O.P)

Capacity

Electrical

data

MUZ-GC35VA

MUZ-GC25VAH

MUZ-GC35VAH

Single phase

230V,50Hz

10

320 (NEO22)

SPECIFICATION

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19: Heating : Indoor Dry-bulb temperature 20: Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency

Outdoor Dry-bulb temperature 35: Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:

3

Model

Item

Current transformer Smoothing capacitor Diode module

Fuse

Defrost heater Intelligent power module Expansion valve coil Reactor Current-detecting resistor Current-limiting PTC thermistor Current-limiting resistor Terminal block Relay

R.V. coil Heater protector Outdoor fan motor thermal fuse IGBT

MUZ-GC25VA

(CT)

(CT761, CT781)

(C61,C62)

(

C63A, C63B, C63C

) (DB61) (DB65)

(DB61, DB65)

(F61)

(F701, F801)

(F71,F801,F901)

(H)

(IPM)

(LEV)

(L61)

(R61)

(R825,R831)

(PTC64)

(

R64A, R64B

)

(TB1,TB2)

(X61) (X63) (X64) (X66)

(21S4)

(26H)

(TR821)

MUZ-GC25VAH

MUZ-GC35VA

MUZ-GC35VAH

20A

—

620+ 420V

— —

25A 600V

—

T3.15AL250V

15A 600V

10A 23.0mH

—

10" 5W

—

STF-01AJ503

—

230V 130W

3A 250V

Open 45:

—

230V 138W

3A 250V

Open 45:

20A

T20AL250V

CAM-MD12ME 12VDC

45m" 5W 25m" 5W

3P

3A 250V

20A 250V

3A 600V

—

500+ 420V

—

15A 600V 10A 600V

—

T3.15AL250V

—

10A 600V

7A 18.0mH

33"

—

2A 240V

SHF-4-10W5

Open 152: (RA6V21-AB) or Open 126: (RA6V21-BB)

Specifications and rating conditions of main electric parts

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

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

HEATING

46 47

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

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

COOLING

FUNCTION

SPL(dB(A))

LINE

HEATING

47 48

Test conditions Cooling : Dry-bulb temperature 35:

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

OUTDOOR UNIT

MICROPHONE

1m

NOISE CRITERIA CURVES

MUZ-GC25VA MUZ-GC25VAH

MUZ-GC35VA MUZ-GC35VAH

5

20.8

144.6

89.6

255

145.5

Service panel

Service port

Air out

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52

43-

40-

REQUIRED SPACE

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

350 mm or more

100 mm or more

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

Air in

381.5

Drain hole

[33 (Only MUZ-GC25VA)

Bolt pitch for

installation

264~280

300

540

270

10

47.5

22.5

17.5

243

Bolt pitch for installation

500

684

61

105

Handle

2 holes 10 X 16

40

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 10 X 21

Drain hole [33 (MUZ-GC35VAH)

REQUIRED SPACE

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

350 mm or more

200 mm or more

100 mm or more

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

Drain hole [42 (MUZ-GC35VA)

OUTLINES AND DIMENSIONS

MUZ-GC25VA MUZ-GC25VAH

Unit: mm

MUZ-GC35VA MUZ-GC35VAH

6

MUZ-GC25VA

WIRING DIAGRAM

7

MUZ-GC25VAH

8

MUZ-GC35VA

9

MUZ-GC35VAH

10

7

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✕260

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

Ambient temperature thermistor RT65

Muffler

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)

Expansion valve

R.V. coil heating ON cooling OFF

Strainer #100

Muffler

Ambient temperature thermistor RT65

Muffler

REFRIGERANT SYSTEM DIAGRAM

MUZ-GC25VA MUZ-GC25VAH

Unit:mm

MUZ-GC35VA MUZ-GC35VAH

11

Outdoor unit

precharged

750

850

14m7m6m5m 11m

Model

Refrigerant piping length (one way)

8m

9m

10m

12m 13m 15m 20m

27000

0

180

90

120

150

210 240 300 450

MUZ-GC25VA MUZ-GC25VAH MUZ-GC35VA MUZ-GC35VAH

Max. length A

Max. Height

difference

B

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Max. length

A

20

Max. Height difference

B

12

Model

Gas

9.52

Liquid

6.35

Piping size O.D : mm

Refrigerant piping : m

MUZ-GC25VA MUZ-GC25VAH

MUZ-GC35VA MUZ-GC35VAH

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

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

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

12

8 PERFORMANCE CURVES

MUZ-GC25VA MUZ-GC35VA MUZ-GC25VAH MUZ-GC35VAH

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

1.5

12.7

8.1

1.4

11.6

7.5

10.6

6.8

6.3

5.7

5.1

difference (degree)

4.5

Indoor air Wet-bulb temperature

1.3

9.6

1.2

8.7

1.1

7.8

1.0

6.9

0.9

Capacity correction factor

18 20 25 30 35 40 46

Indoor intake air Wet-bulb temperature (:)

OUTDOOR UNIT

Wet and dry-bulb thermometers

Cooling capacity

26

24

22 20 18

at Rated frequency

MUZ-GC35VA

MUZ-GC25VAH

MUZ-GC25VA

MUZ-GC35VAH

13

Indoor air Wet-bulb temperature

difference (degree)

MUZ-GC25VAH

6.8

6.3

5.7

5.1

4.5

4.0

10.6

9.6

8.7

7.8

6.9

6.0

MUZ-GC35VAH

MUZ-GC25VA

MUZ-GC35VA

at Rated frequency

input correction factor

Outdoor intake air Dry-bulb temperature (:)

18 20 25 30 35 40 46

0.8

0.9

1.0

1.1

1.2

1.3

Total input (cooling)

22

20 18

Indoor intake air Wet-bulb temperature (

:)

26

24

20.9

19.3

17.7

16.1

14.5

12.9

11.3

9.7

8.0

6.4

27.5

25.4

23.3

21.2

19.1

16.9

14.8

12.7

10.6

8.5

Indoor air Dry-bulb temperature

difference (degree)

at Rated frequency

MUZ-GC35VAH

MUZ-GC25VAH

MUZ-GC35VA

MUZ-GC25VA

Outdoor intake air Wet-bulb temperature (:)

-20 -15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Heating capacity

Capacity correction factor

15 20 26

Indoor intake air Dry-bulb tem

perature (

:

)

20.9

19.3

17.7

16.1

14.5

12.9

11.3

9.7

8.0

6.4

27.5

25.4

23.3

21.2

19.1

16.9

14.8

12.7

10.6

8.5

Indoor air Dry-bulb temperature

difference (degree)

at Rated frequency

MUZ-GC35VAH

MUZ-GC25VAH

MUZ-GC35VA

MUZ-GC25VA

Outdoor intake air Wet-bulb temperature (:)

-20 -15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Total input(heating)

Input correction factor

15

20

26

Indoor intake air Dry-bulb temperature (

:)

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

defrost operation.

14

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

MUZ-GC25VA MUZ-GC25VAH

Correction of Cooling capacity

1.5

Correction of Cooling total input

1.5

Correction of Heating capacity

2.0

Correction of Heating total input

2.0

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

MUZ-GC35VA MUZ-GC35VAH

Correction of Cooling capacity

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Cooling total input

1.5

1.0

0.5

Input correction factors

0.0

0 50 100 150(Hz)

The operational frequency of compressor

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating capacity

2.0

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating total input

2.0

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The 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 varies).

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

15