Mitsubishi Electric Mr.Slim MSZ-GC22NA - C1 User manual

SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS····················· 3
2. SPECIFICATION················································ 4
3. OUTLINES AND DIMENSIONS ························ 5
4. WIRING DIAGRAM············································ 7
5. REFRIGERANT SYSTEM DIAGRAM ··············· 9
6. SERVICE FUNCTIONS ··································· 10
7. MICROPROCESSOR CONTROL ··················· 12
8. TROUBLESHOOTING····································· 18
9. DISASSEMBLY INSTRUCTIONS···················· 39
Models
MSZ-GC22NA - C1
MSZ-GC25NA - C1
MSZ-GC35NA - C1
MSZ-GC35NA - C2
MSZ-GC50NA - C1
MSZ-GC60NA - C1
MSZ-GC71NA - C1
SPLIT-TYPE AIR CONDITIONERS
MSZ-GC22/25/35NA
INDOOR UNIT
Outdoor unit service manual
MUZ-GC·NA Series(OBH482)
MXZ-A·NA Series (OB430)
PARTS CATALOG (OBB481)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
No. OBH481
REVISED EDITION-A
Please void OBH481.
Revision A:
• MSZ-GC35NA - C2 has been added.

2
Revision A:
• MSZ-GC35NA - C2 has been added.
MSZ-GC35NA - C1 →MSZ-GC35NA - C2
• FAN MOTOR has been changed. (AC →DC)

3
Remote control
receiving section
Emergency operation switch
Emergency operation switch
Operation indicator lamp
Remote control
receiving section
Operation Indicator
lamp
Operation Indicator
lamp
Remote control
receiving section
Emergency operation switch (E.O. SW)
Air outlet
Vertical vane
Air inlet
Front panel
Catechin air filter
Horizontal vane
Remote controller
Line flow fan
Air cleaning filter
(Anti-allergy enzyme filter, option)
MSZ-GC22NA
MSZ-GC25NA
MSZ-GC35NA
MSZ-GC60NA
MSZ-GC71NA
MSZ-GC50NA
MSZ-GC22NA
MSZ-GC25NA
MSZ-GC35NA
MSZ-GC60NA
MSZ-GC71NA
MSZ-GC50NA
ACCESSORIES
MSZ-GC22/25/35/50 MSZ-GC60/71
Installation plate 1 1
Installation plate fixing screw 4 × 25 mm 5 7
Remote controller holder 1 1
Fixing screw for 3.5 × 1.6 mm (Black) 2 2
Battery (AAA) for remote controller 2 2
Wireless remote controller 1 1
Felt tape (Used for left or left-rear piping) 1 1
1PART NAMES AND FUNCTIONS

4
Indoor model MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA
Function Cooling Heating Cooling Heating Cooling Heating
Power supply Single phase 220 - 230 V, 60 Hz
Electrical
data
Running current 1 A 0.24
Power input 1 W 45
Fan motor
Model RC4V18-BA
C1 RC4V18-BA
C2 RC0J40-EF
Current 1 A 0.24 C1 0.24
C2 0.27
Dimensions W × H × D mm 788 × 295 × 234
Weight kg 9
Special remarks
Air flow (Super High) m3/h 576 600 576 600 534 570
Air flow (High/Med./Low) 462/354/246 480/378/276 462/354/246 480/378/276 444/330/234 462/354/246
Air direction 4
Sound level (Super High)
dB(A)
43
Sound level (High/Med./
Low) 36/29/21 36/29/22
Fan speed (Super High) rpm 1,070 1,100 1,070 1,100 1,080 1,140
Fan speed (High/Med./
Low) rpm 890/720/550 920/760/600 890/720/550 920/760/600 930/740/580 960/780/600
Fan speed regulator 4
Remote controller model KM05B
Indoor model MSZ-GC50NA MSZ-GC60NA MSZ-GC71NA
Function Cooling Heating Cooling Heating Cooling Heating
Power supply Single phase 220 - 230 V, 60 Hz
Electrical
data
Running current 1 A 0.35 0.6
Power input 1 W 40 60
Fan motor Model RC0J30-CC RC0J56-AA
Current 1 A 0.35 0.6
Dimensions W × H × D mm 780 × 298 × 210 1,100 × 325 × 258
Weight kg 9 16
Special remarks
Air flow (Super High) m3/h 654 –
Air flow (High/Med./Low) 594/445/414 1,032/768/522 1,032/786/522 1,032/798/564 1,032/816/564
Air direction 4 5
Sound level (Super High)
dB(A)
48 –
Sound level (High/Med./
Low) 44/38/32 54/40/32 54/40/33
Fan speed (Super High)
rpm
1300 –
Fan speed (High/Med./
Low) 1,200/1,100/900
1,310/1,030/750 1,310/1,050/750 1,310/1,080/800 1,310/1,080/800
Fan speed regulator 4 3
Remote controller model KM05B KM05C
NOTE : Test conditions are based on CNS 14464, 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
1 Measured under rated operating frequency.
2SPECIFICATION

5
Unit : mm
7459
41.5
214
235
253.5 18.5
320335
155 155
21540.5 254.5
5959 225 225
2
295
53 607 128
8
100
137
119
Piping
Insulation ø35 O.D
Liquid line ø6.35 - 0.5 m (Flared connection ø6.35)
Gas line ø9.52 - 0.43 m (Flared connection ø9.52)
Drain hose Insulation ø28 O.D Connected part ø16 O.D
11 ×26 Oblong hole 11 ×20 Oblong hole
Installation plate
Indoor unit Wall hole ø65
Air in
Air out
Installation plate
Piping
Drain hose
234 5
788
19
159
58
MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA
Specifications and rating conditions of main electric parts
Model
Item MSZ-GC22/25/35 MSZ-GC50 MSZ-GC60/71
Fuse (F11) T3.15AL 250 V
Horizontal vane
motor (MV) 12 VDC MSBPC20M16 12 VDC 250 Ω(at 25˚C) —
Vane motor (MV1/MV2) — — MP20/MP20
Varistor (NR11) S10K320E3K1 (ERZV14D471) ERZV14D471
Terminal block (TB) 3 P 4 P
3OUTLINES AND DIMENSIONS

6
258
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 ø28
Drain hose ø16
(Connected part O.D)
Installation plate
Wall hole ø75
Installation plate Indoor unit
{
Liquid line ø6.35-0.5 m
Gas line ø12-0.43 m
Insulation ø50 O.D
ø32 I.D
{
Liquid line ø9.52-0.5 m
Gas line ø12-0.43 m
Insulation ø50 O.D
ø32 I.D
for MSZ-GC60
for MSZ-GC71
19
159
58
MSZ-GC60NA MSZ-GC71NA Unit : mm
Unit : mm
155 155
335 320
41.5 215
42.5 214
3287.5
7055
5555 225 225
or more7
100
90
106
298
102624.5
780
210 5
53.5
19
159
58
14273.5
234
Air in
Air out
Wall hole ø65
Indoor unit
Installation plate
Installation plate
11×20 Oblong hole
11×26 Oblong hole
Insulation ø28
Drain hose ø16
(Connected part O.D)
Liquid line ø6.35-0.5 m
Gas line ø9.52-0.43 m
Insulation ø35 O.D
ø19 I.D
{
MSZ-GC50NA

7
MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA - C1
MSZ-GC35NA - C2
4WIRING DIAGRAM

8
MSZ-GC50NA
MSZ-GC60NA MSZ-GC71NA

9
MSZ-GC22NA MSZ-GC25NA
MSZ-GC35NA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12(main)
MSZ-GC71NA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant pipe ø15.88
(with heat insulator)
Refrigerant pipe ø9.52
(with heat insulator)
Strainer
#50
Indoor coil
thermistor
RT12(main)
Refrigerant flow in cooling
Refrigerant flow in heating
MSZ-GC50NA
MSZ-GC60NA
Unit:mm
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe ø12.7
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12(main)
Refrigerant pipe ø6.35
(with heat insulator)
Distributor
Indoor coil
thermistor
RT13(sub)
Indoor
heat
exchanger
Room temperature
thermistor
RT11
Refrigerant pipe ø15.88
(with heat insulator)
Flared connection
Flared connection
Indoor coil
thermistor
RT12(main)
Refrigerant pipe ø6.35
(with heat insulator)
Distributor
Indoor coil
thermistor
RT13(sub)
5REFRIGERANT SYSTEM DIAGRAM

10
6-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the indoor electronic control P.C. board.
The time will be shortened as follows. (Refer to 8-7.)
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.)
6-2. 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 twice or 3
times at first.
After finish modification,
put back the batteries then
press the RESET button.
J2
J1
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 accept 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.
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
MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA MSZ-GC50NA MSZ-GC60NA MSZ-GC71NA
6SERVICE FUNCTIONS