Mitsubishi MS-GA50VB-E1, MS-GA60VB-E1, MS-GA80VB-E1 Service Manual

Revision B :

• Indoor heat exchanger of MS-GA80VB - E1 has been changed.

SPLIT-TYPE, AIR CONDITIONERS

• PARTS LIST and RoHS PARTS LIST have been changed.

Please void OB369 REVISED EDITION-A.

INDOOR UNIT

SERVICE MANUAL

No. OB369

REVISED EDITION-B

Wireless type

Models

MS-GA50VB - E1

MS-GA60VB - E1

MS-GA80VB - E1

Outdoor unit service manual

MU-GA•VB Series (OB370)

CONTENTS

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

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

3. SPECIFICATION·················································4

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

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

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

7. REFRIGERANT SYSTEM DIAGRAM ················8

8. SERVICE FUNCTIONS ······································9

9. TROUBLESHOOTING······································11

10. DISASSEMBLY INSTRUCTIONS·····················19

11.PARTS LIST······················································21

12.RoHS PARTS LIST···········································23

13.OPTIONAL PARTS···········································25

NOTE:

This service manual describes technical data of the indoor units.

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

For servicing of RoHS compliant products, refer to the RoHS PARTS LIST (RoHS compliant).

Revision A :

• RoHS PARTS LIST has been added.

Revision B :

• Indoor heat exchanger of MS-GA80VB - E1 has been changed.

• PARTS LIST and RoHS PARTS LIST have been changed.

1 TECHNICAL CHANGES

MS-A18WV - E1 MS-GA50VB - E1

MS-A24WV - E1 MS-GA60VB - E1

MS-A30WV - E1 MS-GA80VB - E1

1.Model name has been changed.

Indication of capacity has been changed. (BTU kW)

2.Grille design has been changed.

3.Unit size has been changed.(W 1,100aoH 325aoD 227a W1,100aoH 325aoD 258a)

2 PART NAMES AND FUNCTIONS

MS-GA50VB MS-GA60VB MS-GA80VB

	Air cleaning filter (option)	Grille
	(White bellows type)

Air inlet

To breaker Front panel

Power supply cord

Catechin air filter

Remote control receiving section

Vertical vanes

Horizontal vane

Remote controller

Operation section	Display section
(When the grille is opened)	Operation indicator lamp

Emergency operation switch

Remote control receiving section

ACCESSORIES

		MS-GA50VB
		MS-GA60VB
		MS-GA80VB
1	Installation plate	1
2	Installation plate fixing screw 4 o 25 mm	7
3	Remote controller holder	1
4	Fixing screw for 3 o 3.5 o 1.6 mm (Black)	2
5	Battery (AAA) for remote controller	2
6	Wireless remote controller	1
7	Felt tape (Used for left or left-rear piping)	1

2

REMOTE CONTROLLER

MS-GA50VB

MS-GA60VB

MS-GA80VB

Signal transmitting section

Operation display section

OPERATE/ STOP (ON/ OFF) button

		PM
		AM
ON/OFF	TOO	TOO
	WARM	COOL

TEMPERATURE buttons

Open the front lid.

VANE button (Horizontal vane button)

OPERATION SELECT button

ECONO COOL button

WIDE VANE button (Vertical vane button)

RESET button

Indication of remote controller model is on back.

AM

ON/OFF	TOO	TOO
	WARM	COOL

	FAN	STOP	FAN SPEED CONTROL button
I FEEL COOL			OFF-TIMER button
	VANE	START
FAN DRY			ON-TIMER button
MODE	WIDE VANE	HR.	HR. button
ECONO COOL	LONG	MIN.	MIN. button
			(TIME SET button)
	RESET CLOCK		CLOCK SET button
			LONG button

3 SPECIFICATION

			Indoor model
			Function
			Power supply
	Capacity Air flow(High/Med./Low)			K /h
	Electrical	data	Power outlet	A
			Power factor	%
			Running current	A
			Power input	W
			Fan motor current	A
	Fan	motor	Model
			Winding	"
			resistance(at 20:)
			Dimensions WOHOD	mm
			Weight	kg
			Air direction
	Special	remarks	Sound level(High/Med./Low)	dB
			Fan speed(High/Med./Low)	rpm
			Fan speed regulator
			Thermistor RT11(at 25:)	k"
			Thermistor RT12(at 25:)	k"
			Remote controller model
			Indoor model
			Function
			Power supply
	Capacity Air flow(High/Med./Low)			K /h
	Electrical	data	Power outlet	A
			Running current	A
			Power input	W
			Power factor	%
			Fan motor current	A
	Fan	motor	Model
			Winding	"
			resistance(at 20:)
			Dimensions WOHOD	mm
			Weight	kg
			Air direction
			Sound level(High/Med./Low)	dB
	Special	remarks	Fan speed(High/Med./Low)	rpm
			Thermistor RT11(at 25:)	k"
			Fan speed regulator
			Thermistor RT12(at 25:)	k"
			Thermistor RT13(at 25:)	k"
			Remote controller model

NOTE: Test conditions are based on ISO 5151. Cooling : Indoor DB27°C WB19°C

Outdoor DB35°C WB(24°C) Indoor-Outdoor piping length : 5m

MS-GA50VB	MS-GA60VB
Cooling	Cooling
Single phase	Single phase
230V, 50Hz	230V, 50Hz
768/642/528	768/672/588
10	10
0.30	0.30
60	60
87	87
0.30	0.30
RC4V32-AA	RC4V32-AA
WHT-BLK 293	WHT-BLK 293
BLK-RED 146	BLK-RED 146
1,100O325O258	1,100O325O258
16	16
5	5
42/38/34	45/41/37
1,070/920/780	1,070/960/850
3	3
10	10
10	10
KM04B	KM04B

MS-GA80VB

Cooling

Single phase 230V, 50Hz

960/822/684

10

0.34

69

88

0.34

RC4V40-AA

WHT-BLK 138.2

BLK-RED 159.0

1,100O325O258

16

5

47/42/37

1,280/1,130/970

3

10

10

10

KM04B

4

4 NOISE CRITERIA CURVES

MS-GA50VB

MS-GA60VB

FAN SPEED SPL(dB(A))

LINE

High 42

FAN SPEED SPL(dB(A))

LINE

High 45

Test conditions,	Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:	Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

BAR	90									BAR	90
MICRO	80									MICRO	80
0.0002	70								NC-70	0.0002	70
dB re	60									dB re	60
LEVEL,										LEVEL,
									NC-60
	50
PRESSURE										PRESSURE	50
									NC-50
	40										40
									NC-40
SOUND										SOUND
	30										30
BAND									NC-30	BAND
	20	APPROXIMATE									20
OCTAVE										OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE									10
		63	125	250	500	1000	2000	4000	8000

							NC-70
							NC-60
							NC-50
							NC-40
							NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR							NC-20
CONTINUOUS
NOISE
63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

BAND CENTER FREQUENCIES, Hz

MS-GA80VB

FAN SPEED SPL(dB(A))

LINE

High 47

Test conditions,

Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

BAR	90
MICRO	80
0.0002	70								NC-70
dB re	60
LEVEL,
									NC-60
	50
PRESSURE
									NC-50
	40
									NC-40
SOUND
	30
BAND									NC-30
	20	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

INDOOR UNIT

WALL

1m

0.8m

MICROPHONE

5

5 OUTLINES AND DIMENSIONS

MS-GA50VB

MS-GA60VB

MS-GA80VB

1068

1100

325

56	791
58	19
162

Wireless remote controller

Unit: mm

Installation plate		Indoor unit
98			173		7.5
				255.5	315
47	414.5	414.5	2.5	47
98			173

Wall hole [75

Air in

253

Air out

258 5

{Liquid line [ 6.35- 0.5m

Installation plate Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D for MS-GA50/60VB

{Liquid line [ 9.52- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D for MS-GA80VB

Drain hose [16 (Connected part O.D)

Insulation [28

Power supply cord Lead to right 2.0m Lead to left 1.0m

6

6	WIRING DIAGRAM
MS-GA50VB
MS-GA60VB
TO OUTDOOR UNIT					CN202
CONNECTING		1TB	BLK			HIC1	2
					1				RT12
			WHT
					2		1
						CN112			BLK
	12V	2			CN201			3		1
						NR11			GRY
					3		CN			2
		N	BLU		2		121		YLW	3	MF
									BRN
					1	C11	1			4
	POWER	L	BRN		TAB12	F11 SR141	3		WHT	5
							4		RED	6
	SUPPLY
						ELECTRONIC CONTROL CN211
	CORD		CN	CN	CN
	~/N 230V					P. C. BOARD	CN		RT11
	50Hz	BRN	151	102	101		111
			15
		BLU		3		3

PE

CIRCUIT BREAKER

GRN/YLW

MV2 MV2 MV1	DISPLAY	RECEIVER
	P. C. BOARD	P. C. BOARD

REMOTE

CONTROLLER

SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
C11	INDOOR FAN CAPACITOR	MV1	VANE MOTOR (HORIZONTAL)	RT12	INDOOR COIL THERMISTOR
F11	FUSE (3.15A)	MV2	VANE MOTOR (VERTICAL)	SR141	SOLID STATE RELAY
HIC1	DC/DC CONVERTER	NR11	VARISTOR	TB	TERMINAL BLOCK
MF	INDOOR FAN MOTOR (INNER FUSE)	RT11	ROOM TEMPERATURE THERMISTOR

NOTES: 1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing. 2.Use copper conductors only. (For field wiring)

3.Symbols below indicate.

: Terminal block

MS-GA80VB

TO OUTDOOR

UNIT

CONNECTING 3TB

12V	N
POWER	L
SUPPLY
CORD
~/N 230V
50Hz	BRN
	BLU
PE	GRN/YLW
CIRCUIT
BREAKER

: Connector

						4	RT13
						3
			HIC1			2	RT12
						1
RED	CN201				CN112		BLK
	3			NR11		CN 3	GRY
	2					121	YLW
BLU
	1			C11		1	BRN MF
							WHT
BRN	TAB12		F11	SR141		3
							RED
						4
CN	CN	CN ELECTRONIC CONTROL			CN211
151	102	101	P. C. BOARD			CN	RT11
						111
15	3		3
MV2 MV2 MV1	DISPLAY	RECEIVER
	P. C. BOARD	P. C. BOARD

REMOTE

CONTROLLER

SYMBOL	NAME		SYMBOL	NAME	SYMBOL	NAME
C11	INDOOR FAN CAPACITOR		MV2	VANE MOTOR(VERTICAL)	SR141	SOLID STATE RELAY
F11	FUSE(3.15A)		NR11	VARISTOR	TB	TERMINAL BLOCK
HIC1	DC/DC CONVERTER		RT11	ROOM TEMPERATURE THERMISTOR
MF	INDOOR FAN MOTOR(INNER PROTECTOR)		RT12	INDOOR COIL THERMISTOR (MAIN)
MV1	VANE MOTOR(HORIZONTAL)		RT13	INDOOR COIL THERMISTOR (SUB)
NOTES: 1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate.
	: Terminal block	: Connector
				7

7 REFRIGERANT SYSTEM DIAGRAM

MS-GA50VB

MS-GA60VB

Unit:mm

Refrigerant pipe [12.7

Refrigerant pipe [15.88

(with heat insulator)

(with heat insulator)

Indoor coil

Indoor coil

Indoor

thermistor

Indoor

thermistor

heat

RT12

heat

RT12

exchanger

Distributor

exchanger

Distributor

Flared connection

Flared connection

Room temperature thermistor

Room temperature

RT11

thermistor RT11

Flared connection

Flared connection

Refrigerant pipe [6.35	Refrigerant pipe [6.35
(with heat insulator)	(with heat insulator)

MS-GA80VB
		Refrigerant pipe [15.88
		(with heat insulator)
Indoor	Indoor coil
heat	thermistor
exchanger	RT12(main)	Flared connection
	Indoor coil
	thermistor
	RT13(sub)
Room temperature
thermistor
RT11
	Strainer
	#50
		Flared connection
		Refrigerant pipe [9.52
		(with heat insulator)	Refrigerant flow in cooling

8

8 SERVICE FUNCTIONS

MS-GA50VB

MS-GA60VB

MS-GA80VB

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows.

Set time : 1 minute 1-second

Set time : 3 minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.

In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification. The board has a print as shown below :

NOTE : For modification, take out the batteries and press the OPERATE/ STOP (ON/ OFF) button 2 or 3 times at first.

After modification, put back the batteries then press the RESET button.

J1 J2

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button.

Table 1

	1 unit operation	2 units operation	3 units operation	4 units operation
No. 1 unit	No modification	Same as at left	Same as at left	Same as at left
No. 2 unit	–	Solder J1	Same as at left	Same as at left
No. 3 unit	–	–	Solder J2	Same as at left
No. 4 unit	–	–	–	Solder both J1 and J2

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit.

The indoor unit only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down.

Please conduct the above setting once again after the power has restored.

9