Mitsubishi MUZ-GE25VA(H), MUZ-GE35VA(H), MUZ-GE42VA(H), MUZ-GE50VA(H), MUZ-GE60VA Service Manual

Revision B:

SPLIT-TYPE AIR CONDITIONERS

•MUZ-GE60VA - E1 and MUZ-GE71VA - E1 have been added.

Please void OBH516 REVISED EDITION-A.

OUTDOOR UNIT

SERVICE MANUAL

HFC	No. OBH516
utilized	REVISED EDITION-B
R410A

Models

MUZ-GE25VA - E1 MUZ-GE25VAH - MUZ-GE35VA - E1 MUZ-GE35VAH - MUZ-GE42VA - E1 MUZ-GE42VAH -

E1

E1

E1

MUZ-GE50VA - E1 MUZ-GE50VAH - E1 MUZ-GE60VA - E1 MUZ-GE71VA - E1

Indoor unit service manual

MSZ-GE•VA Series (OBH515)

MSZ-CGE•VA Series (OBH523)

MUZ-GE25VA MUZ-GE35VA MUZ-GE42VA

CONTENTS

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

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

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

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

5.OUTLINES AND DIMENSIONS ························ 9

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

7.REFRIGERANT SYSTEM DIAGRAM ············· 18

8.PERFORMANCE CURVES ····························· 21

9.ACTUATOR CONTROL··································· 40

10.SERVICE FUNCTIONS···································· 41

11.TROUBLESHOOTING ····································· 41

12.DISASSEMBLY INSTRUCTIONS···················· 61

PARTS CATALOG (OBB516)

NOTE:

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

Revision A:

• MUZ-GE42VA - E1 , MUZ-GE42VAH - E1 , MUZ-GE50VA - E1 and MUZ-GE50VAH - E1 have been added.

Revision B:

• MUZ-GE60VA - E1 and MUZ-GE71VA - E1 have been added.

2

1 TECHNICAL CHANGES

MUZ-GE25VA - E1 MUZ-GE35VA - E1 MUZ-GE42VA - E1 MUZ-GE50VA - E1 MUZ-GE60VA - E1 MUZ-GE71VA - E1

1. New model

MUZ-GE25VAH - E1 MUZ-GE35VAH - E1 MUZ-GE42VAH - E1 MUZ-GE50VAH - E1

3

2 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)

MUZ-GE60VA MUZ-GE71VA

Air inlet (back and side)

Piping

Drain hose

Air outlet

ACCESSORIES				Drain outlet
	Model		MUZ-GE25/35/42VA	MUZ-GE50VA		MUZ-GE60/71VA
	Drain socket		1	1		1
	Drain cap		-	2		-

4

3 SPECIFICATION

Outdoor model

Power supply

Capacity									Cooling	kW
Rated frequency (Min.-Max.)
									Heating
Breaker Capacity									Cooling	A
data	Power input			1 (Total)						W
									Heating
	Running current				1				Cooling	A
Electrical
	Power factor			1 (Total)					Heating
										%
	(Total)								Heating
									Cooling
	Starting current				1 (Total)					A
Coefficient of performance									Cooling
(COP) 1 (Total)			Model						Heating
Compressor			Output						Cooling	W
			Current			1				A
									Heating
			Refrigeration					oil (Model)		cc
Fan motor			Model						Cooling
			Current			1				A
									Heating
Dimensions W ×			H × D							mm
Weight										kg
	Dehumidification								Cooling	/h
				Cooling					High
									Med.
	Air flow 1								Low	m3/h
				Heating					High
remarks									Med.
	Sound level			1					Cooling	dB(A)
									Low
Special									Heating
				Cooling					High
									Med.
	Fan speed								Low	rpm
				Heating					High
									Med.
	Fan speed		regulator						Low
	Refrigerant filling capacity (R410A)									kg

MUZ-	MUZ-		MUZ-	MUZ-	MUZ-		MUZ-
GE25VA	GE35VA		GE42VA	GE50VA
MUZ-	MUZ-		MUZ-	MUZ-	GE60VA		GE71VA
GE25VAH	GE35VAH		GE42VAH	GE50VAH
			Single phase, 230 V, 50 Hz
2.5 (1.1 - 3.5)	3.5 (1.1 - 4.0)		4.2 (0.9 - 4.8)	5.0 (1.4 - 5.5)	6.0 (1.5 - 7.5)		7.1 (2.4 - 8.7)
3.2 (1.3 - 4.5)	4.0 (1.6 - 5.3)		5.4 (1.4 - 6.0)	5.8 (1.4 - 7.3)	6.8 (2.0 - 9.3)		8.1 (2.2 - 9.9)
	10			16	20
545	865		1,215	1,515	1,760		2,130
700	955		1,460	1,565	1,770		2,110
2.9	4.2		5.6	6.8	7.8		9.3
3.7	4.6		6.6	7.0	7.9		9.4
82	90		94	96	98		99
82	90		96	97			98
3.7	4.6		6.6	7.0	7.9		9.4
4.59	4.05		3.46	3.30	3.40		3.33
4.57	4.19		3.70	3.71	3.84		3.83
KNB073FFDHC	KNB092FFAHC		SNB130FGBHT		SNB130FGBMT		SNB172FEKMT
550	650			900			1,200
2.44	3.56		4.99	6.09	6.59		8.00
3.20	4.06		5.98	6.32	6.44		8.07
320	(NEO22)		450	(NEO22)	350(FV50S)		400(FV50S)
RC0J50-DB			RC0J50-EA	RC0J60-AA			-BC
					RC0J60
0.24	0.35				0.84		0.83
			0.32
0.27	0.31			0.32	0.93		0.82
800 × 550 × 285				840 × 850 × 330	840 × 880 × 330
30	33		36	54	50		53
0.2	0.9		1.4	1.8			2.3
					3,492		3,426
		-
1,806	1,872			2,940	3,066		3,006
1,170	1,776		1,086	1,740	1,692		1,512
2,106	2,016			–	2,952		2,892
1,806	1,776			2,940	2,952		2,892
1,452	1,386			2,142	2,226		2,280
			50	54
47					55
48			51	56	55
		-			950
740	810			780	840
490	770		490	480			450
860	870			–	810
740	770			780	810
600	610			580	620		650
	3			2		3
0.80	1.15						1.90
				1.55

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.

5

Specifications and rating conditions of main electric parts

Item

Model

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

MUZ-

GE25VA

GE25VAH

GE35VA

GE35VAH

GE42VA

GE42VAH

GE50VA

GE50VAH

GE60VA

GE71VA

Current

(CT)

20

A

—

transformer

(CT761, CT781)

15 A

—

Smoothing

(C61, C62, C63,

620 μF 420 V

560 μF 350 V

C81, C82, C83,

capacitor

CB1, CB2, CB3)

Diode module

(DB61)

15 A 600 V

25 A 600 V

—

(DB65)

25 A 600 V

—

(F62)

—

T2.0AL250V

Fuse

(F61)

T20AL250V

—

(F601, F701, F801,

T3.15AL250V

F880, F901)

Defrost heater

(H)

—

230 V

—

230 V

—

230 V

—

230 V

—

130 W

130 W

130 W

120 W

Intelligent power

(IC932)

—

5 A 600 V

module

(IPM)

15 A 600 V

20 A 600 V

Expansion valve

(LEV)

12 V DC

coil

Reactor

(L, L61)

18 mH

23 mH

340 μH

Power factor

(PFC)

—

20 A 600 V

controller

(R61)

45 mΩ 5 W

100 mΩ 5 W

—

(1 element)

(2 elements)

Current-

(R61,R62)

—

180 mΩ 5 W

—

(2 elements)

detecting

(R825)

25 mΩ 5 W

—

resistor

(R937, R938,

430 mΩ 2 W

—

R939)

(R937A,R937B)

—

1.1 Ω 2 W

—

Current-limiting

(PTC64,

33 Ω

PTC thermistor

PTC65)

Terminal block

(TB1, TB2)

3 P

(X63)

3 A 250 V

—

Relay

(X64)

20 A 250 V

(X66)

—

3 A 250 V

—

3 A 250 V

—

3 A 250 V

—

3 A 250 V

—

(X601)

—

3 A 250 V

(X602)

—

3 A 250 V

R.V.coil

(21S4)

220 - 240 V AC

Heater protector

(26H)

—

Open 45°C

—

Open 45°C

—

Open 45°C

—

Open 45°C

—

IGBT

(TR821)

30 A 600 V

—

6

4 NOISE CRITERIA CURVES

MUZ-GE25VA MUZ-GE25VAH

MUZ-GE35VA MUZ-GE35VAH

FUNCTION SPL(dB(A))

LINE

				COOLING		47
				HEATING		48
BAR	90								BAR	90
0.0002 MICRO	80								0.0002 MICRO	80
	70							NC-70		70
re									re
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB	60								OCTAVE BAND SOUND PRESSURE LEVEL, dB	60
								NC-60
	50									50
								NC-50
	40									40
								NC-40
	30									30
								NC-30
	20									20
					NC-10			NC-20
	10									10
		125	250	500	1000	2000	4000	8000
	63

FUNCTION SPL(dB(A))

LINE

			COOLING		47
			HEATING		48
							NC-70
							NC-60
							NC-50
							NC-40
							NC-30
				NC-10			NC-20
63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz	BAND CENTER FREQUENCIES, Hz
MUZ-GE42VA MUZ-GE42VAH	MUZ-GE50VA MUZ-GE50VAH

FUNCTION SPL(dB(A))

LINE

				COOLING		50
				HEATING		51
BAR	90								BAR	90
0.0002 MICRO	80								0.0002 MICRO	80
	70							NC-70		70
re									re
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB	60								OCTAVE BAND SOUND PRESSURE LEVEL, dB	60
								NC-60
	50									50
								NC-50
	40									40
								NC-40
	30									30
								NC-30
	20									20
					NC-10			NC-20
	10									10
		125	250	500	1000	2000	4000	8000
	63

FUNCTION SPL(dB(A))

LINE

			COOLING		54
			HEATING		56
							NC-70
							NC-60
							NC-50
							NC-40
							NC-30
				NC-10			NC-20
63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

BAND CENTER FREQUENCIES, Hz

7

MUZ-GE60VA	MUZ-GE71VA

FUNCTION SPL(dB(A))

LINE

				COOLING		55
				HEATING		55
BAR	90								BAR	90
MICRO	80								MICRO	80
0.0002	70							NC-70	0.0002	70
0dB re									0dB re
	60									60
LEVEL,									LEVEL,
								NC-60
	50									50
PRESSURE									PRESSURE
								NC-50
	40									40
								NC-40
SOUND									SOUND
	30									30
								NC-30
BAND									BAND
	20									20
OCTAVE									OCTAVE
					NC-10			NC-20
	10									10
		125	250	500	1000	2000	4000	8000
	63

FUNCTION SPL(dB(A))

LINE

			COOLING		55
			HEATING		55
							NC-70
							NC-60
							NC-50
							NC-40
							NC-30
				NC-10			NC-20
63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

BAND CENTER FREQUENCIES, Hz

Test conditions

Cooling: Dry-bulb temperature 35°C

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

OUTDOOR UNIT

1 m MICROPHONE

8

5 OUTLINES AND DIMENSIONS

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

Unit: mm

REQUIRED SPACE

100 mm or more

344.5

285

400 Air in

44

Air in

2 holes 10 X 21

Air out

22.3

Drain hole ø42 (MUZ-GE25/35/42VA) Drain hole ø33 (MUZ-GE25/35/42VAH)

Bolt pitch for installation 304~325

40	17.5

23

100	mm
	or
	more

200 mm or more

Service panel

ormore mm 100

350	m
	m
	or
	more

Handle

550

280	10		164.5
	150	69	99.5	170.5
	302.5			Service port
	500 Bolt pitch for installation
	800

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

35

43

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

MUZ-GE50VA MUZ-GE50VAH

330

850

515

299

66

Air in

51 34

Air in

170 Air out 500

840

121

430

500 mm or more

REQUIRED SPACE

Drain holes ø33(MUZ-GE50VA)

40				100 mm or more
360	100	mm
		or
		mo
			re
4 holes 10 × 21				350
80					mm	or
			500 mm or more				more
				Service panel
				Liquid refrigerant
				pipe joint
				Refrigerant pipe
				(flared) ø6.35
				30°
		155 90		35°
				Gas refrigerant
				pipe joint
				Refrigerant pipe
			198	(flared) ø12.7

9

MUZ-GE60VA MUZ-GE71VA	Unit: mm

417.5

Air in

330

50

Air out

175 500

840

109

880

452

REQUIRED SPACE

500 mm or more

Drain hole	42
40
		100	mm			100 mm or more
			or
	360		more
2-holes 10 21				350
					mm
					or
			500 mm or more			more
81
				Service panel

Liquid refrigerant pipe joint Refrigerant pipe

(flared) Ø 6.35 (MUZ-GE60VA) Ø 9.52 (MUZ-GE71VA)

35

44

164.5

99.5

Gas refrigerant 195 pipe joint

Refrigerant pipe (flared) Ø 15.88

10

6 WIRING DIAGRAM

MUZ-GE25VA MUZ-GE35VA

11

MUZ-GE25VAH MUZ-GE35VAH

12

MUZ-GE42VA

13

MUZ-GE42VAH

14

MUZ-GE50VA

15

MUZ-GE50VAH

16

MUZ-GE60VA MUZ-GE71VA

17

7 REFRIGERANT SYSTEM DIAGRAM

MUZ-GE25VA MUZ-GE25VAH

Unit: mm

Refrigerant pipe

ø9.52

4-way valve

(with heat insulator)

Muffler

Outdoor heat

Stop valve

exchanger

temperature

(with service port)

Muffler

Outdoor

thermistor

Flared connection

Discharge

heat

RT68

temperature

exchanger

thermistor

RT62

Compressor

Ambient

temperature

thermistor

Defrost

RT65

thermistor

RT61

Strainer

Flared connection

#100

Capillary tube

LEV

R.V. coil

ø3.0×ø2.0×240

heating ON

Stop valve

cooling OFF

Refrigerant pipe

ø6.35 (with strainar)

Refrigerant flow in cooling

(with heat insulator)

Refrigerant flow in heating

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

Unit: mm

Refrigerant pipe ø9.52	4-way valve
(with heat insulator)
	Muffler				Outdoor heat
	Stop valve				exchanger
					temperature
	(with service port)
Flared connection			Muffler	Outdoor	thermistor
	Discharge			heat	RT68
	temperature			exchanger
	thermistor
	RT62		Compressor		Ambient
					temperature
					thermistor
			Defrost		RT65
			thermistor
			RT61
			Capillary tube
			ø3.0×ø1.8×600(×2)
				Strainer
Flared connection		LEV		#100
	Capillary tube
				R.V. coil
	ø3.0×ø2.0×240
				heating ON
	Stop valve			cooling OFF
Refrigerant pipe ø6.35	(with strainar)			Refrigerant flow in cooling
(with heat insulator)				Refrigerant flow in heating

18

MUZ-GE50VA MUZ-GE50VAH				Unit: mm
Refrigerant pipe ø12.7		Muffler
	4-way valve	#100
(with heat insulator)
	Stop valve
Flared connection	(with service port)	Discharge	Outdoor
			heat	Ambient
		temperature	exchanger	temperature
		thermistor	Defrost	thermistor
		RT62	thermistor	RT65
			RT61

		Compressor	Outdoor heat
			exchanger
			temperature
			thermistor
	Flared connection		RT68
		LEV Strainer
	Receiver		R.V. coil
		#100
			heating ON
	Stop valve	Capillary tube	cooling OFF
	Refrigerant pipe ø6.35 (with strainar)	ø3.6×ø2.4×50	Refrigerant flow in cooling
	(with heat insulator)		Refrigerant flow in heating

MUZ-GE60VA

	Refrigerant pipe ø15.88		Muffler
		4-way valve	#100
	(with heat insulator)

Stop valve
(with service port)			Outdoor
Flared connection	Discharge		heat	Ambient
	temperature	Defrost	exchanger	temperature
	thermistor			thermistor
	RT62	thermistor		RT65
		RT61
	Compressor		Outdoor heat
			exchanger
			temperature
			thermistor
Flared connection			RT68
	LEV	Strainer
Strainer			R.V. coil
#100		#100
			heating ON
Stop valve	Capillary tube		cooling OFF
Refrigerant pipe ø6.35	ø4.0×ø2.4×100	Refrigerant flow in cooling
(with heat insulator)		Refrigerant flow in heating

19

	MUZ-GE71VA		Unit: mm
	Refrigerant pipe ø15.88		Muffler
		4-way valve	#100
	(with heat insulator)

Stop valve
(with service port)			Outdoor
Flared connection	Discharge		heat	Ambient
	temperature	Defrost	exchanger	temperature
	thermistor			thermistor
	RT62	thermistor		RT65
		RT61
	Compressor		Outdoor heat
			exchanger
			temperature
			thermistor
Flared connection			RT68
	LEV	Strainer
Strainer			R.V. coil
#100		#100
			heating ON
Stop valve	Capillary tube		cooling OFF
Refrigerant pipe ø9.52	ø4.0×ø2.4×100	Refrigerant flow in cooling
(with heat insulator)		Refrigerant flow in heating

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Refrigerant piping: m

Piping size O.D: mm

Max. Length A

Max. Height difference B

Gas

Liquid

MUZ-GE25/35/42

20

12

9.52

6.35

MUZ-GE50

30

15

12.7

MUZ-GE60

15.88

MUZ-GE71

9.52

Indoor

unit

Max. Height

difference

B

Max. Length

A

Outdoor unit

ADDITIONAL REFRIGERANT CHARGE (R410A: g)

Model

Outdoor unit

Refrigerant piping length (one way)

precharged

5 m

6 m

7 m

8 m

9 m

10 m

11 m

12 m

13 m

14 m

15 m

20 m

MUZ-GE25

800

0

0

0

30

60

90

120

150

180

210

240

390

MUZ-GE35/42

1,150

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

Model

Outdoor unit

Refrigerant piping length (one way)

precharged

7 m

10 m

15 m

20 m

25 m

30 m

MUZ-GE50

1,550

0

60

160

260

360

460

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

Model

Outdoor unit

Refrigerant piping length (one way)

precharged

7 m

10 m

15 m

20 m

25 m

30 m

MUZ-GE60

1,550

0

0

100

200

300

400

Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 10)

Model

Outdoor unit

Refrigerant piping length (one way)

precharged

7 m

10 m

15 m

20 m

25 m

30 m

MUZ-GE71

1,900

0

0

275

550

825

1,100

Calculation: X g = 55 g/m × (Refrigerant piping length (m) – 10)

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

20

8 PERFORMANCE CURVES

MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH MUZ-GE60VA MUZ-GE71VA

The standard 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 ~ 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]		Cooling
	(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]		Heating
	(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.

INDOOR UNIT

OUTDOOR UNIT

Wet and dry-bulb	Wet and dry-bulb
thermometers	thermometers
FRONT VIEW	BACK VIEW

8-1. CAPACITY AND INPUT CURVES

Cooling capacity (at Rated frequency)

air Wet-bulb temperature	difference (°C)
Indoor

6.6	8.4	10.4	10.2	9.3	9.7		1.5
6.1	7.7	9.5	9.4	8.6	8.9	factors	1.4								Indoor intake air Wet-bulb
															temperature(		)
5.6	7.1	8.7	8.6	7.9	8.2	correction	1.3
5.1	6.5	8.0	7.9	7.2	7.5		1.2										26
4.6	5.9	7.2	7.1	6.5	6.8	Capacity	1.1										24
4.2	5.3	6.5	6.4	5.8	6.1		1.0
3.7	4.7	5.7	5.7	5.2	5.4		0.9											22
																		20
GE25VA-MUZ GE25VAH-MUZ	GE35VA-MUZ GE35VAH-MUZ	GE42VA-MUZ GE42VAH-MUZ	GE50VA-MUZ GE50VAH-MUZ															18
					GE60VA-MUZ	GE71VA-MUZ	-10	-5	0	5	10	15	20	25	30	35	40	45
									Outdoor intake air Dry-bulb temperature(°C)

21