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

Revision A:

SPLIT-TYPE AIR CONDITIONERS

• MUZ-GE42/50VA(H) - E1 has been added. Please void OBH516.

OUTDOOR UNIT

SERVICE MANUAL

HFC	No. OBH516
utilized	REVISED EDITION-A
R410A

Models

MUZ-GE25VA - E1 MUZ-GE25VAH - MUZ-GE35VA - E1 MUZ-GE35VAH - MUZ-GE42VA - E1 MUZ-GE42VAH - MUZ-GE50VA - E1 MUZ-GE50VAH -

E1

E1

E1

E1

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

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. ACTUATOR CONTROL··································· 31
	10. SERVICE FUNCTIONS···································· 32
	11. TROUBLESHOOTING ····································· 32
MUZ-GE25/35/42VA	12. DISASSEMBLY INSTRUCTIONS···················· 50

PARTS CATALOG (OBB516)

NOTE:

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

Revision A:

• MUZ-GE42/50VA(H) - E1 has been added.

2

1 TECHNICAL CHANGES

MUZ-GE25VA - E1 MUZ-GE35VA - E1 MUZ-GE42VA - E1 MUZ-GE50VA - 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)
ACCESSORIES
	MUZ-GE25/35/42VA	MUZ-GE50VA
Drain socket	1	1
Drain cap	-	2

4

3			SPECIFICATION
				Outdoor model							MUZ-GE25VA			MUZ-GE35VA		MUZ-GE42VA		MUZ-GE50VA
											MUZ-GE25VAH			MUZ-GE35VAH		MUZ-GE42VAH		MUZ-GE50VAH
					Power supply									Single phase,		230 V, 50 Hz
Capacity									Cooling	kW	2.5 (1.1 - 3.5)			3.5 (1.1 - 4.0)		4.2 (0.9 - 4.8)		5.0 (1.4 - 5.5)
Rated frequency (Min.-Max.)									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)
Breaker Capacity										A				10				16
data	Power input				1 (Total)				Cooling	W		545		865		1,215		1,515
									Heating			700		955		1,460		1,565
	Running current					1			Cooling	A		2.9		4.2		5.6		6.8
Electrical
	Power factor				1 (Total)				Heating			82		90		96		97
										%
	(Total)								Heating			3.7		4.6		6.6		7.0
									Cooling			82		90		94		96
	Starting current					1 (Total)				A		3.7		4.6		6.6		7.0
Coefficient of performance									Cooling			4.59		4.05		3.46		3.30
(COP) 1 (Total)									Heating			4.57		4.19		3.70		3.71
				Model							KNB073FFDHC			KNB092FFAHC		SNB130FGBHT
Compressor				Output						W		550		650			900
				Current			1		Cooling	A		2.44		3.56		4.99		6.09
									Heating			3.20		4.06		5.98		6.32
				Refrigeration				oil (Model)		cc		320		(NEO22)		450 (NEO22)
Fan motor				Model								RC0J50-DB				RC0J50-EA		RC0J60-AA
				Current			1		Cooling	A		0.24		0.35		0.32		0.32
									Heating			0.27		0.31		0.31
Dimensions W ×				H × D						mm				800 × 550 × 285				840 × 850 × 330
Weight										kg		30		33		36		54
	Dehumidification								Cooling	/h		0.2		0.9		1.4		1.8
					Cooling				Med.			1,806		1,872		1,872		2,940
	Air flow 1								Low	m3/h		1,170		1,776		1,086		1,740
					Heating				High			2,106		2,016		2,016		–
remarks									Med.			1,806		1,776		1,776		2,940
	Sound level				1				Cooling	dB(A)		1,452	47			50		54
									Low				1,386			1,386		2,142
Special									Heating				48			51		56
					Cooling				Med.			740		810		810		780
	Fan speed								Low	rpm		490		770		490		480
					Heating				High			860		870		870		–
									Med.			740		770		770		780
									Low			600		610		610		580
	Fan speed			regulator										3				2
	Refrigerant filling capacity (R410A)									kg		0.80		1.15				1.55
NOTE: Test conditions are based on ISO 5151.												Wet-bulb temperature			19°C
		Cooling: Indoor					Dry-bulb temperature 27°C
				Outdoor Dry-bulb temperature 35°C
		Heating: Indoor					Dry-bulb temperature 20°C					Wet-bulb temperature				6°C
				Outdoor Dry-bulb temperature							7°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-

GE25VA

GE25VAH

GE35VA

GE35VAH

GE42VA

GE42VAH

GE50VA

GE50VAH

Current

(CT)

20

A

transformer

(CT761, CT781)

15 A

Smoothing

(C61, C62, C63)

620 μF 420 V

capacitor

Diode module

(DB61)

15 A 600 V

25 A 600 V

(DB65)

25 A 600 V

Fuse

(F61)

T20AL250V

(F701, F801,

T3.15AL250V

F901)

Defrost heater

(H)

—

230 V

—

230 V

—

230 V

—

230 V

130 W

130 W

130 W

120 W

Intelligent power

(IPM)

15 A 600 V

20 A 600 V

module

Expansion valve

(LEV)

DC 12 V

coil

Reactor

(L61)

18 mH

23 mH

(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

Relay

(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

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

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
	Test conditions
	Cooling : Dry-bulb temperature 35 °C
	Heating : Dry-bulb temperature 7 °C Wet-bulb temperature 6 °C
	OUTDOOR UNIT
	1 m
	MICROPHONE

7

5 OUTLINES AND DIMENSIONS

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

REQUIRED SPACE

Unit: mm

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

400Drain hole ø42 (25/35/42VA)

Drain hole ø33 (25/35/42VAH)

Air in

100	mm
	or
	more

ormore mm 100

344.5

285

44

Air in

Bolt pitch for installation 304~325

ormore mm 200

350	mm
	or
	more

				40	17.5					Open two sides of left,
	2 holes 10 X 21									right, or rear side.
	22.3	Air out					23		Service panel
	Handle								Liquid refrigerant pipe joint
									Refrigerant pipe (flared) ø6.35
550									35	43
280	10					164.5			Gas refrigerant pipe joint
									Refrigerant pipe (flared) ø9.52
		150			69		99.5		170.5
		302.5							Service port
		500 Bolt pitch for installation
		800
MUZ-GE50VA MUZ-GE50VAH										Open as a rule
										500 mm or more if
										the front and both
							REQUIRED SPACE			sides are open
		515
	66	299	Drain holes ø33(50VA)							100 mm or more
		Air in								200 mm or more if
			40
	51 34									there are obstacles
										to both sides
330	Air in				360	100		mm
									or
									more

850

430

170	Air out 500	4 holes 10 × 21
	840	80
	121

Open as a rule

500 mm or more if the back, both sides and top are open

155

90

350	mm
	or
	more

Service panel

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

30° 35°

Gas refrigerant pipe joint Refrigerant pipe

198 (flared) ø12.7

8

6 WIRING DIAGRAM

MUZ-GE25VA MUZ-GE35VA

9

MUZ-GE25VAH MUZ-GE35VAH

10

MUZ-GE42VA

11

MUZ-GE42VAH

12

MUZ-GE50VA

13

MUZ-GE50VAH

14

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

15

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

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

		Refrigerant piping: m		Piping size O.D: mm
		Max. Length	Max. Height difference
		A	B	Gas	Liquid
	MUZ-GE25/35/42	20	12	9.52	6.35
	MUZ-GE50	30	15	12.7

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

16

8 PERFORMANCE CURVES

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 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

air Wet-bulb temperature	difference (°C)
Indoor

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

17