Mitsubishi MUZ-GE25VA(H), MUZ-GE35VA(H), MUZ-GE42VA(H), MUZ-GE50VA(H) Service Manual

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

Revision A:

• MUZ-GE42/50VA(H) -

Please void OBH516.

has been added.

SERVICE MANUAL

Models

MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH -

HFC

utilized

R410A

Indoor unit service manual MSZ-GE•VA Series (OBH515) MSZ-CGE•VA Series (OBH523)

No. OBH516

REVISED EDITION-A

MUZ-GE25/35/42VA

NOTE:

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

CONTENTS

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

2. PART NAMES AND FUNCTIONS ····················· 4

3. SPECIFICATION ················································ 5

4. NOISE CRITERIA CURVES ······························ 7

5. OUTLINES AND DIMENSIONS ························ 8

6. WIRING DIAGRAM ············································ 9

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

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

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

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

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

12. DISASSEMBLY INSTRUCTIONS ···················· 50

PARTS CATALOG (OBB516)

Revision A:

• MUZ-GE42/50VA(H) -

has been added.

TECHNICAL CHANGES

MUZ-GE25VA MUZ-GE35VA MUZ-GE42VA MUZ-GE50VA -

1. New model

E1 E1 E1

MUZ-GE25VAH MUZ-GE35VAH MUZ-GE42VAH MUZ-GE50VAH -

E1 E1 E1 E1

PART NAMES AND FUNCTIONS

MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

MUZ-GE50VA MUZ-GE50VAH

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

(GE50VA)

ACCESSORIES

MUZ-GE25/35/42VA MUZ-GE50VA

Drain socket 1 1 Drain cap - 2

SPECIFICATION

Outdoor model

Power supply Single phase, 230 V, 50 Hz

Capacity Rated frequency (Min.-Max.)

Breaker Capacity A 10 16

Power input 1 (Total)

Running current (Total)

Power factor 1 (Total)

Electrical data

Starting current 1 (Total) A 3.7 4.6 6.6 7.0

Coefﬁ cient of performance (COP)

Compressor

Fan motor

Dimensions W × H × D mm 800 × 550 × 285 840 × 850 × 330 Weight kg 30 33 36 54

NOTE: Test conditions are based on ISO 5151.

Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Heating: Indoor Dry-bulb temperature 20°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C Refrigerant piping length (one way): 5 m 1 Measured under rated operating frequency.

1 (Total)

Dehumidiﬁ cation Cooling /h 0.2 0.9 1.4 1.8

Air ﬂ ow 1

Sound level 1

Special remarks

Fan speed

Fan speed regulator 3 2 Refrigerant ﬁ lling capacity (R410A) kg 0.80 1.15 1.55

Model KNB073FFDHC KNB092FFAHC SNB130FGBHT Output W 550 650 900

Current 1

Refrigeration oil (Model) cc 320 (NEO22) 450 (NEO22) Model RC0J50-DB RC0J50-EA RC0J60-AA

Current

Cooling

Heating

Cooling

Heating

Cooling Heating 3.2 (1.3 - 4.5) 4.0 (1.6 - 5.3) 5.4 (1.4 - 6.0) 5.8 (1.4 - 7.3)

Cooling Heating 700 955 1,460 1,565 Cooling Heating 3.7 4.6 6.6 7.0 Cooling Heating 82 90 96 97

Cooling 4.59 4.05 3.46 3.30 Heating 4.57 4.19 3.70 3.71

Cooling Heating 3.20 4.06 5.98 6.32

Cooling

Heating 0.27 0.31 0.31

Med.

Low 1,170 1,776 1,086 1,740

High 2,106 2,016 2,016 –

Med. 1,806 1,776 1,776 2,940

Low 1,452 1,386 1,386 2,142 Cooling Heating 48 51 56

Med.

Low 490 770 490 480

High 860 870 870 –

Med. 740 770 770 780

Low 600 610 610 580

m3/h

dB(A)

rpm

MUZ-GE25VAH

MUZ-GE25VA

2.5 (1.1 - 3.5) 3.5 (1.1 - 4.0) 4.2 (0.9 - 4.8) 5.0 (1.4 - 5.5)

545 865 1,215 1,515

2.9 4.2 5.6 6.8

82 90 94 96

2.44 3.56 4.99 6.09

0.24 0.35 0.32

1,806 1,872 1,872 2,940

740 810 810 780

MUZ-GE35VA

MUZ-GE35VAH

47 50 54

MUZ-GE42VA

MUZ-GE42VAH

MUZ-GE50VA

MUZ-GE50VAH

0.32

Speciﬁ cations and rating conditions of main electric parts

Item Current

transformer Smoothing

capacitor

Diode module

Fuse

Defrost heater (H) —

Intelligent power module

Expansion valve coil

Reactor (L61) 18 mH 23 mH

Currentdetecting resistor

Current-limiting PTC thermistor

Terminal block (TB1, TB2) 3 P

Relay

R.V.coil (21S4) AC 220 - 240 V Heater protector (26H) — Open 45°C — Open 45°C — Open 45°C — Open 45°C IGBT (TR821) 30 A 600 V

(CT761, CT781) 15 A

(C61, C62, C63) 620 μF 420 V

(R937A,R937B) — 1.1 Ω 2 W

Model

(CT) 20 A

(DB61) 15 A 600 V 25 A 600 V (DB65) 25 A 600 V

(F61) T20AL250V

(F701, F801,

F901)

(IPM) 15 A 600 V 20 A 600 V

(LEV) DC 12 V

(R61)

(R61,R62) —

(R825) 25 mΩ 5 W

(R937, R938,

R939)

(PTC64,

PTC65)

(X63) 3 A 250 V (X64) 20 A 250 V (X66) — 3 A 250 V — 3 A 250 V — 3 A 250 V — 3 A 250 V

MUZ-

GE25VA

45 mΩ 5 W

(1 element)

MUZ-

GE25VAH

230 V

130 W

MUZ-

GE35VA

—

100 mΩ 5 W

(2 elements)

430 mΩ 2 W —

MUZ-

GE35VAH

T3.15AL250V

230 V

130 W

33 Ω

MUZ-

GE42VA

—

MUZ-

GE42VAH

230 V

130 W

180 mΩ 5 W

(2 elements)

MUZ-

GE50VA

—

MUZ-

GE50VAH

230 V

120 W

NOISE CRITERIA CURVES

MUZ-GE25VA MUZ-GE25VAH

FUNCTION

COOLING HEATING

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A)) LINE

47 48

NC-10

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUZ-GE35VA MUZ-GE35VAH

FUNCTION

COOLING

HEATING

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A))

47 48

NC-10

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUZ-GE42VA MUZ-GE42VAH

FUNCTION

COOLING HEATING

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A)) LINE

50 51

NC-10

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUZ-GE50VA MUZ-GE50VAH

FUNCTION

COOLING HEATING

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

Test conditions Cooling : Dry-bulb temperature 35 °C Heating : Dry-bulb temperature 7 °C Wet-bulb temperature 6 °C

SPL(dB(A)) LINE

54 56

NC-10

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

OUTDOOR UNIT

1 m

MICROPHONE

OUTLINES AND DIMENSIONS

MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH

REQUIRED SPACE

344.5

285

550

Air in

2 holes 10 X 21

22.3

Handle

280

400

Air in

Air out

150

302.5 500 Bolt pitch for installation

800

Drain hole ø42 (25/35/42VA) Drain hole ø33 (25/35/42VAH)

17.5

164.5

installation

Bolt pitch for

99.5 Service port

304~325

100 mm or more

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

Service panel

Liquid refrigerant pipe joint Refrigerant pipe (flared) ø6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) ø9.52

170.5

Unit: mm

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

100 mm or more

350 mm or more

200 mm or more

MUZ-GE50VA MUZ-GE50VAH

515

299

Air in

330

Air out

121

500 840

170

850

430

Drain holes ø33(50VA)

360

4 holes 10 × 21

REQUIRED SPACE

100 mm or more

Open as a rule 500 mm or more if the back, both sides and top are open

155

Open as a rule 500 mm or more if the front and both sides are open

198

100 mm or more 200 mm or more if there are obstacles to both sides

350 mm or more

Service panel

Liquid refrigerant pipe joint Refrigerant pipe (flared) ø6.35

30°

35°

Gas refrigerant pipe joint Refrigerant pipe (flared) ø12.7

MUZ-GE25VA MUZ-GE35VA

WIRING DIAGRAM

MUZ-GE25VAH MUZ-GE35VAH

MUZ-GE42VA

MUZ-GE42VAH

MUZ-GE50VA

MUZ-GE50VAH

REFRIGERANT SYSTEM DIAGRAM

MUZ-GE25VA MUZ-GE25VAH

Refrigerant pipe ø9.52 (with heat insulator)

Stop valve (with service port)

Flared connection

Stop valve

Refrigerant pipe ø6.35 (with heat insulator)

(with strainar)

4-way valve

Muffler

Capillary tube ø3.0×ø2.0×240

Discharge temperature thermistor RT62

LEV

Muffler

Compressor

Defrost thermistor RT61

Outdoor heat exchanger

temperature Outdoor heat exchanger

Refrigerant flow in cooling Refrigerant flow in heating

thermistor

RT68

Ambient temperature thermistor RT65

Strainer #100

R.V. coil heating ON cooling OFF

Unit: mm

MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH

Refrigerant pipe ø9.52 (with heat insulator)

Flared connection

Refrigerant pipe ø6.35 (with heat insulator)

Muffler

Stop valve (with service port)

Capillary tube ø3.0×ø2.0×240

Stop valve (with strainar)

4-way valve

Discharge temperature thermistor RT62

LEV

Muffler

Compressor

Defrost thermistor RT61

Capillary tube ø3.0×ø1.8×600(×2)

Refrigerant flow in cooling Refrigerant flow in heating

Outdoor heat exchanger

Strainer #100

R.V. coil heating ON cooling OFF

Outdoor heat exchanger temperature thermistor RT68

Ambient temperature thermistor RT65

Unit: mm

MUZ-GE50VA MUZ-GE50VAH

Refrigerant pipe (with heat insulator)

Flared connection

Refrigerant pipe ø6.35 (with heat insulator)

12.7 4-way valve

Stop valve (with service port)

Receiver

Stop valve (with strainar)

Muffler

#100

Discharge temperature thermistor RT62

Compressor

Capillary tube

3.6

2.4×50

LEV

Strainer

#100

Outdoor heat

Defrost thermistor RT61

Refrigerant flow in cooling Refrigerant flow in heating

exchanger

Outdoor heat exchanger temperature thermistor RT68

R.V. coil heating ON cooling OFF

Ambient temperature thermistor RT65

Unit: mm

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Refrigerant piping: m

Max. Length

Max. Height difference

MUZ-GE25/35/42 20 12 9.52

MUZ-GE50 30 15 12.7

Indoor unit

Max. Height

difference

Max. Length A

Outdoor unit

Piping size O.D: mm

Gas Liquid

ADDITIONAL REFRIGERANT CHARGE (R410A: g)

Model

Outdoor unit

precharged

MUZ-GE25 800 MUZ-GE35/42 1,150

5 m 6 m 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m

0 0 0 30 60 90 120 150 180 210 240 390

Refrigerant piping length (one way)

Calculation: X g = 30 g/m × (Refrigerant piping length (m) - 7)

6.35

Model

Outdoor unit

precharged

7 m 10 m 15 m 20 m 25 m 30 m

Refrigerant piping length (one way)

MUZ-GE50 1,550 0 60 160 260 360 460

Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 7)

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

PERFORMANCE CURVES8

MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH

The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-

tions 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 ~ 264 V, 50 Hz

(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]

(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(6) Outdoor intake air wet-bulb temperature: °C [WB]

INDOOR UNIT OUTDOOR UNIT

Wet and dry-bulb thermometers FRONT VIEW

8-1. CAPACITY AND INPUT CURVES

6.6

8.4

6.1

7.7

5.6

7.1

5.1

6.5

4.6

4.2

3.7

5.9

5.3

4.7

difference (°C)

Indoor air Wet-bulb temperature

10.4

9.5

8.7

8.0

7.2

6.5

5.7

10.2

9.4

8.6

7.9

7.1

6.4

5.7

1.5

1.4

1.3

1.2

1.1

1.0

Capacity correction factors

0.9

-10-5 0 5 1015202530354045

Cooling capacity (

Outdoor intake air Dry-bulb temperature(°C)

Wet and dry-bulb thermometers BACK VIEW

at Rated frequency)

Indoor intake air Wet-bulb temperature( )

22 20 18

MUZ-GE25VA

MUZ-GE25VAH

MUZ-GE35VA

MUZ-GE35VAH

MUZ-GE50VA

MUZ-GE42VA

MUZ-GE50VAH

MUZ-GE42VAH

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