Mitsubishi Electric MXZ-2C30VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ···································3
2. PART NAMES AND FUNCTIONS ·····················4
3. SPECIFICATION ················································5
4. NOISE CRITERIA CURVES ····························15
5. OUTLINES AND DIMENSIONS ······················18
6. WIRING DIAGRAM ··········································24
7. REFRIGERANT SYSTEM DIAGRAM ·············35
8. PERFORMANCE CURVES ·····························44
9. ACTUATOR CONTROL ···································75
10. SERVICE FUNCTIONS ····································76
11. TROUBLESHOOTING ·····································80
12. DISASSEMBLY INSTRUCTIONS ···················114
INDOOR UNITS COMBINATION SHEETS
Models
No. OBH584
REVISED EDITION-E
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
MXZ-4C80VA
MXZ-5C100VA
OUTDOOR UNIT
Indoor unit service manual
MSZ-FD•VA Series (OBH488)
MSZ-FH•VE Series (OBH623)
MSZ-GE•VA Series (OBH515)
MSZ-EF•VE Series (OBH589)
MSZ-SF•VA Series (OBH555)
MSZ-SF•VE Series (OBH600)
MFZ-KA•VA Series (OB409)
MLZ-KA•VA Series (OBH483)
SLZ-KA•VA Series (OC320)
SEZ-KD•VA(L) Series (HWE07110)
PLA-RP•BA Series (OCH412)
PCA-RP•KA Series (OCH454)
PEAD-RP•JA Series (HWE08130)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB584)
MXZ-2C30VA - E1
MXZ-2C40VA - E1
MXZ-2C52VA - E1
MXZ-3C54VA - E1
MXZ-3C68VA - E1
MXZ-4C71VA - E1
MXZ-4C80VA - E1
MXZ-4C80VA2 - E1
MXZ-5C100VA - E1
MXZ-5C100VA2 - E1
Please void OBH584 REVISED EDITION-D.
Revision E:
• INDOOR UNITS COMBINATION SHEETS for
MXZ-6C122VA-
E1
have been added.
MXZ-6C120VA - E1
MXZ-6C120VA - E2
MXZ-6C122VA - E1

2
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
Revision A:
• MXZ-2C30VA-
E1
, MXZ-2C40VA-
E1
, and MXZ-2C52VA-
E1
have been added.
Use the specified refrigerant onl
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
Revision B:
• MXZ-6C120VA-
E2
has been added.
• FAILURE MODE RECALL FUNCTION has been corrected.
Revision C:
• MXZ-4C80VA2- E1 and MXZ-5C100VA2- E1 have been added.
Revision D:
• MXZ-6C122VA-
E1
has been added.
Revision E:
• INDOOR UNITS COMBINATION SHEETS for MXZ-6C122VA-
E1
have been added.
OBH584E

3
TECHNICAL CHANGES
1
MXZ-3B54VA - E1 MXZ-3C54VA - E1
MXZ-3B68VA - E1 MXZ-3C68VA - E1
MXZ-4B71VA - E1 MXZ-4C71VA - E1
MXZ-4B80VA - E1 MXZ-4C80VA - E1
MXZ-5A100VA - E1 MXZ-5C100VA - E1
1. Indoor units combinations have been added (MSZ-EF Series).
2. Outdoor fan motor has been changed.
MXZ-6C120VA - E1
1. New model
MXZ-2B30VA - E1 MXZ-2C30VA - E1
1. Indoor units combinations have been added (MSZ-EF Series).
2. Muffler has been added.
MXZ-2B40VA - E1 MXZ-2C40VA - E1
1. Indoor units combinations have been added (MSZ-EF Series).
2. Muffler has been added.
MXZ-2B52VA - E1 MXZ-2C52VA - E1
1. Indoor units combinations have been added (MSZ-EF Series).
2. Muffler has been added.
MXZ-6C120VA - E1 MXZ-6C120VA - E2
1. Accumulator has been added.
2. Power receiver has been removed.
3. Model name of compressor has been changed.
4. Control P.C. board has been changed.
MXZ-4C80VA - E1 MXZ-4C80VA2 - E1
1. Front panel has been changed.
2. Grille has been changed.
3. Grille roof has been added.
4. Service panel has been changed.
5. Base has been changed.
6. Rear guard has been changed.
7. Drain socket has been changed.
8. Unit size has been changed. (W x H x D: 900 x 900 x 320 900 x 915 x 320)
9. Weight of the unit has been changed. (67 kg 69 kg)
MXZ-5C100VA - E1 MXZ-5C100VA2 - E1
1. Front panel has been changed.
2. Grille has been changed.
3. Grille roof has been added.
4. Service panel has been changed.
5. Base has been changed.
6. Rear guard has been changed.
7. Drain socket has been changed.
8. Unit size has been changed. (W x H x D: 900 x 900 x 320 900 x 915 x 320)
9. Weight of the unit has been changed. (68 kg 70 kg)
MXZ-6C120VA - E2 MXZ-6C122VA - E1
1. Outdoor control P.C. board has been changed.
OBH584E

4
PART NAMES AND FUNCTIONS
2
ACCESSORIES
Drain socket
Drain cap (MXZ-3C/4C/5C)
1
2
MXZ-4C80VA
MXZ-5C100VA
Air outlet
Drain outlet
Air inlet
(Back and side)
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-3C54VA
MXZ-3C68VA
MXZ-4C71VA
MXZ-6C120VA
MXZ-6C122VA
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-2C30VA
MXZ-2C40VA
MXZ-2C52VA
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(Back and side)
MXZ-4C80VA2
MXZ-5C100VA2
Air outlet
Drain outlet
Air inlet
(Back and side)
OBH584E

5
SPECIFICATION
3
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20 °C)
Dimensions W x H x D
Weight
Sound level (High)
Fan speed (High)
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P) 2
Outdoor unit power supply
MXZ-2C30VA
Single phase
230 V, 50 Hz
1 to 2
Max. 20
Max. 15
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
10
90
3.94
0.35
KNB073FGDHC
750
U-V 1.70
V-W 1.70 W-U 1.70
RC0J50-CF
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
33
1.15
0.32 (NEO22)
Cooling
3.0 (1.1 - 4.0)
—
1,974
2.71
560
2.36
5.36
46
860
Heating
4.0 (1.0 - 4.4)
—
1,878
3.94
815
3.59
4.91
47
820
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
OBH584E

6
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20 °C)
Dimensions W x H x D
Weight
Sound level
Fan speed
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P) 1 2
Outdoor unit power supply
MXZ-2C40VA
Single phase
230 V, 50 Hz
1 to 2
Max. 30
Max. 20
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
15
95
4.00
0.35
KNB092FFDHC
1,100
U-V 1.70
V-W 1.70 W-U 1.70
RC0J50-CF
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
35
1.3
0.32 (NEO22)
Cooling
4.0 (1.1 - 4.5)
—
1,752
4.00
875
3.65
4.57
47
840
Heating
4.5 (1.0 - 5.0)
—
1,596
3.98
870
3.60
5.17
48
770
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
OBH584E

7
MXZ-2C52VA
Single phase
230 V, 50 Hz
1 to 2
Max. 30
Max. 20
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
15
97
7.22
0.35
SNB130FGBHT
1,400
U-V 0.98
V-W 0.98 W-U 0.98
RC0J50-CF
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
38
1.3
0.45 (NEO22)
Cooling
5.2 (1.1 - 6.0)
—
1,974
5.83
1,300
5.48
4.00
49
900
Heating
6.4 (1.0 - 7.0)
—
1,998
7.22
1,610
6.87
3.98
50
910
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20 °C)
Dimensions W x H x D
Weight
Sound level (High/Low)
Fan speed (High/Low)
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P) 2
Outdoor unit power supply
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
OBH584E

8
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20°C)
Dimensions W x H x D
Weight
Sound level
Fan speed
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-3C54VA
Single phase
230 V, 50 Hz
1 to 3
Max. 50
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
25
99
6.43
0.2
SNB130FGBH1T
1,400
U-V 0.98
V-W 0.98 W-U 0.98
RC0J60-CB
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
57
2.7
0.7 (NEO22)
Cooling
5.4 (2.9-6.8)
—
2,526
5.23
1,190
5.03
4.54
47
650
Heating
7.0 (2.6-9.0)
—
2,580
6.43
1,465
6.23
4.78
51
660
Outdoor unit power supply
OBH584E

9
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20°C)
Dimensions W x H x D
Weight
Sound level
Fan speed
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-3C68VA
Single phase
230 V, 50 Hz
1 to 3
Max. 60
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
25
99
9.00
0.2
SNB172FEGH1T
1,800
U-V 0.72
V-W 0.72 W-U 0.72
RC0J60-CB
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
57
2.7
0.7 (NEO22)
Cooling
6.8 (2.9-8.4)
—
2,526
7.80
1,775
7.60
3.83
48
650
Heating
8.6 (2.6-10.6)
—
2,580
9.00
2,050
8.80
4.20
52
660
Outdoor unit power supply
OBH584E

10
COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
1 Measured under rated operating frequency.
2 Electrical data is for only outdoor unit.
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
Outdoor model
Indoor units number
Piping total length
Connecting pipe length
Height difference (Indoor ~ Outdoor)
Height difference (Indoor ~ Indoor)
Function
Capacity [Rated (Min.-Max.) Hz]
Dehumidification
Outdoor air flow
Breaker capacity
Running current
Power input
Power factor
Starting current
Compressor motor current
Fan motor current
Model
Output
Winding
resistance (at 20 °C)
Model
Winding
resistance (at 20°C)
Dimensions W x H x D
Weight
Sound level
Fan speed
Refrigerant filling
capacity (R410A)
Refrigeration oil (Model)
m
m
m
m
kW
/h
m3 /h
A
A
W
%
A
A
A
W
Ω
Ω
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-4C71VA
Single phase
230 V, 50 Hz
1 to 4
Max. 60
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
25
99
7.49
0.2
SNB172FEGH1T
2,000
U-V 0.72
V-W 0.72 W-U 0.72
RC0J60-CB
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
58
2.7
0.7 (NEO22)
Cooling
7.1 (3.7-8.8)
—
2,526
7.38
1,680
7.18
4.23
48
650
Heating
8.6 (3.4-10.7)
—
2,580
7.49
1,705
7.29
5.04
52
660
Outdoor unit power supply
OBH584E