Mitsubishi Electric MXZ-2B30VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES···························· 13
5. OUTLINES AND DIMENSIONS ······················ 15
6. WIRING DIAGRAM·········································· 19
7. REFRIGERANT SYSTEM DIAGRAM············· 25
8. PERFORMANCE CURVES····························· 32
9. ACTUATOR CONTROL··································· 59
10. SERVICE FUNCTIONS···································· 60
11. TROUBLESHOOTING····································· 64
12. DISASSEMBLY INSTRUCTIONS···················· 89
INDOOR UNITS COMBINATION SHEETS
Models
No. OBH554
REVISED EDITION-D
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
MXZ-4B80VA
OUTDOOR UNIT
Indoor unit service manual
MSZ-FA•VA Series (OB371)
MSZ-FD•VA Series (OBH488)
MSZ-GA•VA Series (OB378, OB388)
MSZ-CB•VA Series (OB441)
MSZ-GC•VA Series (OBH468)
MSZ-GE•VA Series (OBH515)
MSZ-SF•VA Series (OBH555)
MFZ-KA•VA Series (OB409)
MLZ-KA•VA Series (OBH483)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB554)
Please void OBH554 REVISED EDITION-C.
MXZ-2B30VA - E1 MXZ-4B71VA - E1
MXZ-2B40VA - E1 MXZ-4B80VA - E1
MXZ-2B52VA - E1 MXZ-5B100VA - E1
MXZ-3B54VA - E1
MXZ-3B68VA - E1
Revision D:
• FAILURE MODE RECALL FUNCTION
has been corrected.
• Some descriptions have been modified.

2
TECHNICAL CHANGES
1
MXZ-4A80VA - E2 MXZ-4B80VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Electronic control P.C. board has been changed.
3. Noise filter P.C. board has been changed.
4. Power board has been changed.
5. LEV coil has been changed.
MXZ-5A100VA - E1 MXZ-5B100VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Electronic control P.C. board has been changed.
3. Noise filter P.C. board has been changed.
4. Power board has been changed.
5. LEV coil has been changed.
MXZ-3A54VA - E7 MXZ-3B54VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Electronic control P.C. board has been changed.
3. Noise filter P.C. board has been changed.
4. Power board has been changed.
5. LEV coil has been changed.
MXZ-3B68VA - E1
1. New model
Revision B :
• MXZ-2B30VA-
E1
and MXZ-2B52VA-
E1
have been added.
Revision A :
• MXZ-2B40VA-
E1
, MXZ-3B54VA-
E1
, MXZ-3B68VA-
E1
and MXZ-4B71VA-
E1
have been added.
• Power board of
MXZ-4B80VA-
E1
and MXZ-5B100VA-
E1
has been changed .
Use the specified refrigerant only
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 C:
• Errors in TROUBLESHOOTING have been corrected.
Revision D:
• FAILURE MODE RECALL FUNCTION has been corrected.
• Some descriptions have been modified.
OBH554D

3
MXZ-4A71VA - E7 MXZ-4B71VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Electronic control P.C. board has been changed.
3. Noise filter P.C. board has been changed.
4. Power board has been changed.
5. LEV coil has been changed.
6. Compressor has been changed. (SNB130FGBH1T SNB172FEGH1T)
MXZ-2A30VA - E2 MXZ-2B30VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Compressor has been changed. (KNB073FGDH KNB073FGDHC)
3. Inverter P.C. board has been changed.
4. Interface P.C. board has been changed.
5. LEV coil has been changed.
MXZ-2A52VA - E2 MXZ-2B52VA - E1
1. Indoor units combinations have been added (15/20/42 class).
2. Compressor has been changed. (SNB130FKMH SNB130FGBHT)
3. Inverter P.C. board has been changed.
4. Interface P.C. board has been changed.
5. LEV coil has been changed.
MXZ-2A40VA - E2 MXZ-2B40VA - E1
1. Indoor units combinations have been added (15/20 class).
2. Compressor has been changed. (KNB092FEDH KNB092FFDHC)
3. Inverter P.C. board has been changed.
4. Interface P.C. board has been changed.
5. LEV coil has been changed.
OBH554D

4
PART NAMES AND FUNCTIONS
2
ACCESSORIES
Drain socket
Drain cap (MXZ-3B/4B/5B)
1
2
MXZ-4B80VA
MXZ-5B100VA
Air outlet
Drain outlet
Air inlet
(Back and side)
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-3B54VA
MXZ-3B68VA
MXZ-4B71VA
MXZ-2B30VA
MXZ-2B40VA
MXZ-2B52VA
Air inlet
Air outlet
Drain outlet
Piping
Drain hose
(Back and side)
OBH554D

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/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
cc
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P) 2
Outdoor unit power supply
MXZ-2B30VA
Single phase
230 V, 50 Hz
1 to 2
Max. 20
Max. 15
Refer to 9
Refer to 9
10
90
3.94
0.35
KNB073FGDHC
750
U-V 1.70
V-W 1.70 W-U 1.70
RC0J50-CI
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
33
1.15
320 (NEO22)
Cooling
3.0 (1.1 - 4.0)
—
2,025
2.71
560
2.36
5.36
46
880
Heating
4.0 (1.0 - 4.4)
—
1,855
3.94
815
3.59
4.91
47
810
COOLING INDOOR Dry-bulb temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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)
OBH554D

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
cc
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P) 1 2
Outdoor unit power supply
MXZ-2B40VA
Single phase
230 V, 50 Hz
1 to 2
Max. 30
Max. 20
Refer to 9
Refer to 9
15
95
4.00
0.35
KNB092FFDHC
1,100
U-V 1.70
V-W 1.70 W-U 1.70
RC0J50-CI
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
35
1.3
320 (NEO22)
Cooling
4.0 (1.1 - 4.5)
—
1,750
4.00
875
3.65
4.57
47
840
Heating
4.5 (1.0 - 5.0)
—
1,595
3.98
870
3.60
5.17
48
770
COOLING INDOOR Dry-bulb temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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)
OBH554D

7
MXZ-2B52VA
Single phase
230 V, 50 Hz
1 to 2
Max. 30
Max. 20
Refer to 9
Refer to 9
15
97
7.22
0.35
SNB130FGBHT
1,400
U-V 0.98
V-W 0.98 W-U 0.98
RC0J50-CI
BLK-WHT 14.2
WHT-RED 14.2 RED-BLK 14.2
800 x 550 x 285
38
1.3
450 (NEO22)
Cooling
5.2 (1.1 - 6.0)
—
1,975
5.83
1,300
5.48
4.00
49
900
Heating
6.4 (1.0 - 7.0)
—
2,000
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
cc
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 temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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)
OBH554D

8
COOLING INDOOR Dry-bulb temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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
cc
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-3B54VA
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-AA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
57
2.7
700(NEO22)
Cooling
5.4 (2.9-6.8)
—
2,525
5.23
1,190
5.03
4.23
47
650
Heating
7.0 (2.6-9.0)
—
2,580
6.43
1,465
6.23
5.04
51
660
Outdoor unit power supply
OBH554D

9
COOLING INDOOR Dry-bulb temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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
cc
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-3B68VA
Single phase
230 V, 50 Hz
1 to 4
Max. 50
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-AA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
57
2.7
700(NEO22)
Cooling
6.8 (3.7-8.4)
—
2,525
7.80
1,775
7.60
3.83
48
650
Heating
8.6 (3.4-10.6)
—
2,580
9.00
2,050
8.80
4.20
52
660
Outdoor unit power supply
OBH554D

10
COOLING INDOOR Dry-bulb temperature27.0°C Wet-bulb temperature 19.0°C
OUTDOOR Dry-bulb temperature35.0°C Wet-bulb temperature 24.0°C
HEATING INDOOR Dry-bulb temperature20.0°C
OUTDOOR Dry-bulb temperature7.0°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
cc
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-4B71VA
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-AA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
840 x 710 x 330
58
2.7
700(NEO22)
Cooling
7.1 (3.7-8.8)
—
2,525
7.38
1,680
7.18
4.54
48
650
Heating
8.6 (3.4-10.7)
—
2,580
7.49
1,705
7.29
4.78
52
660
Outdoor unit power supply
OBH554D