Mitsubishi Electric MSZ-GA50VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················9
8. SERVICE FUNCTIONS ····································10
9. TROUBLESHOOTING······································12
10. DISASSEMBLY INSTRUCTIONS·····················24
11. PARTS LIST······················································27
12. OPTIONAL PARTS ······················BACK COVER
Wireless type
Models
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
No. OB388
SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
Indication of model name
NOTE:
This service manual describes technical data of the indoor unit.
•As for outdoor units MUZ-GA50VA - , MUZ-GA60VA - and MUZ-GA71VA - , refer to the
service manual OB389.
•As for outdoor units MXZ-3A54VA - , MXZ-4A71VA - and MXZ-4A80VA - , refer to the
service manual OB377. E1E1E1
E1E1E1
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2
1
MSZ-A18YV - ➔MSZ-GA50VA -
MSZ-A24YV - ➔MSZ-GA60VA -
MSZ-A26YV - ➔MSZ-GA71VA - E1E1
E1E1
E1E1
1. Indication of capacity has been changed.(BTU base ➔kW base)
2. Power supply cord has been removed.
3. Indoor electronic control P.C. board has been changed.
4. Indoor fan motor has been changed. ( AC ➔DC)
5. Shape of motor band and motor bed have been changed.
6. Symbol on terminal block has been changed (to S1/S2/S3).
TECHNICAL CHANGES
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3
PART NAMES AND FUNCTIONS
2
INDOOR UNIT
Grille
(When the grille is opened)
Remote controller
Operation section Display section
Emergency operation switch
Operation indicator lamp
Air inlet
Remote control
receiving section
Horizontal vane
Vertical vanes
Air cleaning filter (option)
(Anti-allergy enzyme
filter:blue bellows type)
Catechin air filter
Remote control
receiving section
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
ACCESSORIES
Indoor unit
1
2
3
4
5
6
7
Installation plate
Installation plate fixing screw 4 o25 mm
Remote controller holder
Fixing screw for 3o3.5 o1.6 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
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA -
E1
E1
E1
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4
REMOTE CONTROLLER
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
ON/OFF
TOO
COOL
TOO
WARM
LONG
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
TEMPERATURE buttons
Indication of remote controller
model is on back.
ON-TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
VANE CONTROL button
(Horizontal vane button)
OFF-TIMER button
LONG button
RESET button
WIDE VANE button
(Vertical vane button)
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
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5
SPECIFICATION
3
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
✽1
Power input ✽1
Auxiliary heater
Power factor
✽1
Fan motor current ✽1
Model
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"
MSZ-GA50VA - E1
Single phase
230V, 50Hz
852/690 /498
20
0.45
50
—
48
0.45
RC0J56-AA
1,100O325O258
16
5
48/38 /31
1,120/940 /720
3
10
10
10
KM05C
Cooling
Heating
MSZ-GA60VA - E1
Single phase
230V, 50Hz
20
0.60
60
—
43
0.60
RC0J56-AA
1,100O325O258
16
5
54/40 /32
3
10
10
10
KM05C
Cooling
1,032/768 /522
1,310/1030 /750
Heating
1,032/786 /522
1,310/1050 /750
Electrical data
Fan motor
Special remarks
Capacity
w w
w w
ww
ww
ww
ww
w w
ww
ww
w w
ww
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 Wet-bulb temperature(24°C)
Heating : Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15.5°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
Indoor-Outdoor piping length 5m
wReference value
✽1 Measured under rated operating frequency.
Indoor model
Function
Power supply
Air flow
(High/Med. /Low )
Power outlet
Running current
✽1
Power input ✽1
Auxiliary heater
Power factor
✽1
Fan motor current ✽1
Model
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"
MSZ-GA71VA - E1
Single phase
230V, 50Hz
20
0.60
60
—
43
0.60
RC0J56-AA
1,100O325O258
16
5
54/40 /33
3
10
10
10
KM05C
Cooling
1,032/798 /564
1,310/1,060 /800
Heating
1,032/816 /564
1,310/1,080 /800
Electrical data
Fan motor
Special remarks
Capacity
w w
ww
ww
w w
ww w
ww
ww
w
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6
NOISE CRITERIA CURVES
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:
48
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
MSZ-GA50VA - E1 MSZ-GA60VA -
MSZ-GA71VA - E1
E1
INDOOR UNIT
Item Model
Fuse
Vane motor
Varistor
Terminal block
(F11)
(MV1/ MV2)
(NR11)
(TB)
MSZ-GA60VA - E1
MSZ-GA50VA - E1 MSZ-GA71VA - E1
T3.15AL 250V
MP20/MP20
ERZV14D471
4P
Specifications and rating conditions of main electric parts
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:
54
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
INDOORUNIT WALL
MICROPHONE
0.8m
1m
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7
OUTLINES AND DIMENSIONS
5
258
159
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 MSZ-GA50/60VA
for MSZ-GA71VA
INDOOR UNIT
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1 Unit: mm
OB388.qxp 05.1.26 18:12 Page 7

WIRING DIAGRAM
8
6
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
MODELS WIRING DIAGRAM
INDOOR UNIT
MV2 MV2
5 5
152
CN
3
CN
101
BLU
CN211
6
5
3
1
RT12
RT11
MF
BLK
YLW
112
CN
CN
111
WHT
RED
RT13
2
45
1
2
3
4
GRN
S1
T111
CN
151
1
2
CN201
LD104
12-24V
105(T)
LD
2
F11
NR11
DB111
TAB3
TB
S3 RED
BLK
TO OUTDOOR
UNIT
CONNECTING
MV1
5
RECEIVER
P.C.BOARD
SW P.C.
BOARD
INDOOR ELECTRONIC
CONTROL P.C. BOARD
BLU
230V~
3
POWER MONITOR
P.C.BOARD
S2
REMOTE
CONTROLLER
SYMBOL
RT13
T111
TB
SYMBOL
MV2
NR11
RT11
RT12
SYMBOL
DB111
F11
MF
MV1
DIODE STACK
FUSE (3.15A)
INDOOR FAN MOTOR
VANE MOTOR (HORIZONTAL)
VANE MOTOR (VERTICAL)
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
TRANSFORMER
TERMINAL BLOCK
NAME NAME NAME
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.
: Connector
: Terminal block
NOTES:
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9
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-GA71VA - E1
INDOOR UNIT
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant pipe [15.88
(with heat insulator)
Refrigerant pipe [9.52
(with heat insulator)
Indoor coil
thermistor
RT12(main)
Strainer
#50
Refrigerant flow in cooling
Refrigerant flow in heating
MSZ-GA50VA - E1
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [12.7
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12(main)
Refrigerant pipe[6.35
(with heat insulator)
Distributor
MSZ-GA60VA - E1
INDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe [15.88
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12(main)
Refrigerant pipe [6.35
(with heat insulator)
Distributor
Unit:mm
Indoor coil
thermistor
RT13(sub)
Indoor coil
thermistor
RT13(sub)
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10
8
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are
memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power
has restored after power failure. Then, the unit will restart automatically.
8-3. AUTO RESTART FUNCTION
Table 1
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
3 units operation
Same as at left
Same as at left
Solder J2
–
4 units operation
Same as at left
Same as at left
Same as at left
Solder both J1 and J2
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 :
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.)
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.
NOTE : For remodelling, take out
the batteries and press the
OPERATE/STOP(ON/OFF)
button twice or 3 times at first.
After finish remodelling,
put back the batteries then
press the RESET button.
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA - E1
E1
E1
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 will 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.
SERVICE FUNCTIONS
Remote controller model : KM05C
J2
J1
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