SERVICE MANUAL
SPLIT-TYPE, AIR CONDITIONERS
Wireless type
Models
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MS-GA50VB MS-GA60VB MS-GA80VB -
(WH)
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(WH)
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(WH)
CONTENTS
No. OB369
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
Indication of model name
MS-GA50VB MS-GA60VB MS-GA80VB -
NOTE:
This service manual describes technical data of the indoor units.
As for outdoor units MU-GA50VB - , MU-GA60VB - and MU-GA80VB - ,
refer to service manual OB370.
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9. TROUBLESHOOTING ······································11
10. DISASSEMBLY INSTRUCTIONS·····················19
11. PARTS LIST······················································21
12. OPTIONAL PARTS ···········································23
E1E1E1
1
Grille
(When the grille is opened)
Remote controller
Operation section
Display section
Emergency operation switch
Operation indicator lamp
Air inlet
To Breaker
Power supply cord
Remote control
receiving section
Air cleaning filter (option)
(White bellows type)
Horizontal vane
Vertical vanes
Catechin air filter
Remote control
receiving section
Catechin air filter
Front panel
1
2
3
4
5
6
7
Installation plate
Installation plate fixing screw 4 o 25 mm
Remote controller holder
Fixing screw for 3 o 3.5 o 1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
7
1
2
2
1
1
MS-GA50VB MS-GA60VB MS-GA80VB -
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TECHNICAL CHANGES
MS-A18WV - ➔MS-GA50VB MS-A24WV - ➔MS-GA60VB MS-A30WV - ➔MS-GA80VB -
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
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INDOOR UNIT
MS-GA50VB MS-GA60VB MS-GA80VB -
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ACCESSORIES
Indoor unit
2
REMOTE CONTROLLER
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM
TOO
COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
WIDE VANE
LONG
I FEEL
COOL
DRY
PM
CLOCK
AM
RESET CLOCK
FAN
Open the front lid.
Signal transmitting section
Operation display section
OPERATE/ STOP
(ON/ OFF)button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button
OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button
ECONO COOL button
VANE button
(Horizontal vane button)
CLOCK SET button
LONG button
WIDE VANE button
(Vertical vane button)
Indication of remote controller
model is on back.
MS-GA50VB MS-GA60VB MS-GA80VB -
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3
3
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed(High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Remote controller model
K /h
A
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
MS-GA50VB -
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Cooling
Single phase
230V, 50Hz
768/642 /528
10
0.30
60
—
87
0.30
RC4V32-AA
WHT-BLK 293
BLK-RED 146
1,100O325O258
16
5
42/38 /34
1,070/920 /780
3
10
10
KM04B
MS-GA60VB -
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Cooling
Single phase
230V, 50Hz
768/672 /588
10
0.30
60
—
87
0.30
RC4V32-AA
WHT-BLK 293
BLK-RED 146
1,100O325O258
16
5
45/41 /37
1,070/960 /850
3
10
10
KM04B
Electrical
data
Fan
motor
Special
remarks
Capacity
ww
ww
w
w
ww
w
w
w
w
w
w
w
w
ww
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level(High/Med. /Low )
Fan speed(High/Med. /Low )
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Thermistor RT13(at 25:)
Remote controller model
K /h
A
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
k"
MS-GA80VB -
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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
Electrical
data
Fan
motor
Special
remarks
Capacity
ww
w
w
ww
w
w
w
w
w
w
SPECIFICATION
NOTE: Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Indoor-Outdoor piping length : 5m
w Reference value
Outdoor DB35°C WB(24°C)
4
4
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
47
SPL(dB(A)) LINE
High
FAN SPEED
NOISE CRITERIA CURVES
MS-GA50VB -
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FAN SPEED
High
SPL(dB(A)) LINE
42
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
90
80
70
60
50
40
30
MS-GA60VB -
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
90
80
NC-70
NC-60
NC-50
NC-40
NC-30
70
60
50
40
30
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FAN SPEED
High
SPL(dB(A)) LINE
45
NC-70
NC-60
NC-50
NC-40
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MS-GA80VB -
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NC-20
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
NOISE
10
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
INDOORUNIT
WALL
1m
0.8m
MICROPHONE
NC-20
5
5
258
162
19
58
47
7.5
315
255.547
2.5
98
173
98 173414.5 414.5
5
253
791
56
1068
1100
325
Air out
Air in
Insulation [28
Drain hose [16
(Connected part O.D)
Installation plate
Wall hole [75
Wireless remote controller
Installation plate
Indoor unit
{
Liquid line [ 6.35-0.5m
Gas line [ 12-0.43m
Insulation [ 50 O.D
[ 32 I.D
{
Liquid line [ 9.52-0.5m
Gas line [ 12-0.43m
Insulation [ 50 O.D
[ 32 I.D
for MS-GA50VB
for MS-GA60/GA80VB
Power supply cord
Lead to right 2.0m
Lead to left 1.0m
OUTLINES AND DIMENSIONS
MS-GA50VB MS-GA60VB MS-GA80VB -
INDOOR UNIT
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Unit: mm
6
6
WIRING DIAGRAM
MS-GA50VB MS-GA60VB -
INDOOR UNIT
TO OUTDOOR UNIT
CONNECTING
12V
POWER
SUPPLY
CORD
~/N 230V
50Hz
PE
CIRCUIT
BREAKER
SYMBOL
C11
F11
HIC1
NOTES:
INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
MF
INDOOR FAN MOTOR (INNER FUSE)
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
TB
1
2
N
L
BRN
BLU
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BLK
WHT
BLU
BRN
GRN/YLW
NAME
MV2
: Connector
MODELS WIRING DIAGRAM
CN202
1
2
CN201
3
2
1
TAB12
ELECTRONIC CONTROL
CN
151
15
MV2
SYMBOL
MV1
MV1
MV2
NR11
RT11
CN
102
DISPLAY
P. C. BOARD
VANE MOTOR (HORIZONTAL)
VANE MOTOR (VERTICAL)
VARISTOR
ROOM TEMPERATURE THERMISTOR
CN
101
P. C. BOARD
33
RECEIVER
P. C. BOARD
NAME
HIC1
F11
REMOTE
CONTROLLER
NR11
C11
SR141
SYMBOL
RT12
SR141
TB
2
1
CN112
CN
121
1
3
4
3
RT12
BLK
GRY
YLW
BRN
WHT
RED
1
2
3
MF
4
5
6
CN211
CN
111
RT11
NAME
INDOOR COIL THERMISTOR
SOLID STATE RELAY
TERMINAL BLOCK
MS-GA80VB -
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MODEL WIRING DIAGRAM
INDOOR UNIT
TO OUTDOOR
UNIT
CONNECTING
12V
POWER
SUPPLY
CORD
~/N 230V
50Hz
PE
CIRCUIT
BREAKER
SYMBOL
C11
F11
HIC1
MF
MV1
NOTES:
INDOOR FAN CAPACITOR
FUSE(3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER PROTECTOR)
VANE MOTOR(HORIZONTAL)
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
TB
3
N
L
BRN
BLU
RED
BLU
BRN
GRN/YLW
NAME
MV2
: Connector
CN
151
15
MV2
SYMBOL
MV2
NR11
RT11
RT12
RT13
MV1
CN201
3
2
1
TAB12
CN
102
DISPLAY
P. C. BOARD
CN
101
NAME NAME
VANE MOTOR(VERTICAL)
VARISTOR
ROOM TEMPERATURE THERMIST OR
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
7
HIC1
NR11
F11
SR141
ELECTRONIC CONTROL
P. C. BOARD
33
RECEIVER
P. C. BOARD
REMOTE
CONTROLLER
SYMBOL
SR141
TB
4
3
2
1
CN112
3
CN
121
1
C11
3
4
CN211
CN
111
SOLID STATE RELAY
TERMINAL BLOCK
RT13
RT12
BLK
GRY
YLW
BRN
WHT
RED
RT11
MF
7
REFRIGERANT SYSTEM DIAGRAM
MS-GA50VB -
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
E1
Indoor coil
thermistor
RT12
Distributor
Refrigerant pipe [12.7
(with heat insulator)
Flared connection
Flared connection
MS-GA60VB -
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
E1
Indoor coil
thermistor
RT12
Distributor
Unit:mm
Refrigerant pipe [15.88
(with heat insulator)
Flared connection
Flared connection
MS-GA80VB -
INDOOR UNIT
Indoor
heat
exchanger
Indoor coil
thermistor
RT13(sub)
Room temperature
thermistor
RT11
Strainer
#50
E1
Indoor coil
thermistor
RT12(main)
Refrigerant pipe [6.35
(with heat insulator)
Refrigerant pipe [15.88
(with heat insulator)
Flared connection
Flared connection
Refrigerant pipe [6.35
(with heat insulator)
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant flow in cooling
8
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