Mitsubishi Electric MXZ-3C54VA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 3
3. SPECIFICATION················································ 4
4. NOISE CRITERIA CURVES···························· 10
5. OUTLINES AND DIMENSIONS ······················ 12
6. WIRING DIAGRAM·········································· 16
7. REFRIGERANT SYSTEM DIAGRAM············· 22
8. PERFORMANCE CURVES····························· 27
9. ACTUATOR CONTROL··································· 50
10. SERVICE FUNCTIONS···································· 51
11. TROUBLESHOOTING····································· 54
12. DISASSEMBLY INSTRUCTIONS···················· 80
INDOOR UNITS COMBINATION SHEETS
Models
No. OBH584
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
MXZ-4C80VA
MXZ-5C100VA
OUTDOOR UNIT
Indoor unit service manual
MSZ-FD•VA Series (OBH488)
MSZ-GE•VA Series (OBH515)
MSZ-EF•VA Series
MSZ-SF•VA Series (OBH555)
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-3C54VA - E1
MXZ-3C68VA - E1
MXZ-4C71VA - E1
MXZ-4C80VA - E1
MXZ-5C100VA - E1
MXZ-6C120VA - E1

2
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
<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.

3
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
Air outlet
Drain outlet
Air inlet
(Back and side)

4
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
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
SPECIFICATION
3

5
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
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

6
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
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

7
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
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
MXZ-4C80VA
Single phase
230 V, 50 Hz
1 to 4
Max. 70
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
25
99
8.59
0.2
TNB220FMCH
2,100
U-V 1.41
V-W 1.41 W-U 1.41
RC0J60-CA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
900 x 900 x 320
67
3.5
0.87 (NEO22)
Cooling
8.0 (3.7-9.2)
—
2,526
8.59
1,955
8.39
4.09
46
560
Heating
9.4 (3.4-11.6)
—
2,628
8.48
1,930
8.28
4.87
48
580
Outdoor unit power supply

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
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
Outdoor unit power supply
MXZ-5C100VA
Single phase
230 V, 50 Hz
1 to 5
Max. 80
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
25
99
12.45
0.2
TNB220FMCH
2,700
U-V 1.41
V-W 1.41 W-U 1.41
RC0J60-CA
BLK-WHT 15.2
WHT-RED 15.2 RED-BLK 15.2
900 x 900 x 320
68
4.0
0.87 (NEO22)
Cooling
10.0 (3.9 - 11.0)
—
3,396
12.30
2,800
12.1
3.57
51
720
Heating
12.0 (4.1 - 14.0)
—
3,558
12.45
2,835
12.25
4.23
54
750

9
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
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
mm
kg
dB
rpm
kg
L
Compressor
2 Electrical data
Fan motor
Special remarks Capacity System
Coefficient of performance(C.O.P)
Outdoor unit power supply
MXZ-6C120VA
Single phase
230 V, 50 Hz
1 to 6
Max. 80
Max. 25
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
32
99
15.85
0.3
TNB306FPGM2
3,000
U-V 0.53
V-W 0.53 W-U 0.53
SIC-81FW-D888-1
900 x 1,070 x 320
88
5.0
1.07 (FV50S)
Cooling
12.0 (3.5 - 13.5)
—
3,324
15.85
3,610
15.55
3.32
55
590
Heating
14.0 (3.5 - 16.5)
—
4,194
15.24
3,470
14.94
4.03
57
730
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)

10
NOISE CRITERIA CURVES
4
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
47
SPL(dB(A))
51
LINE
MXZ-3C54VA
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
46
SPL(dB(A))
48
LINE
MXZ-4C80VA
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
48
SPL(dB(A))
52
LINE
MXZ-3C68VA
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
48
SPL(dB(A))
52
LINE
MXZ-4C71VA

11
OUTDOOR UNIT
MICROPHONE
1m Test conditions
Cooling :Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating :Dry-bulb temperature 7°C Wet-bulb temperature 6°C
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
51
SPL(dB(A))
54
LINE
MXZ-5C100VA MXZ-6C120VA
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
55
SPL(dB(A))
57
LINE

12
OUTLINES AND DIMENSIONS
5
100 or more
500 or more
350 or more350 or more
100 or more
500 or more
100 or more
100 or more 350 or more
200 or more
500 or more
Service space
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave front and overhead
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
2.Service space
(Bolt Pitch)
4-10 x 21 Oval hole
(Base bolt M10)
Air in
Air in
Air out
3- 33 Drain hole
31.3
12.3 18.3
171500169
63.2
360.6
16.8
288233.1
17.717.7
396
30 330
66.3
840 30
710
299
360
240
200
Indoor and outdoor
connect wiring
39 x 27 hole
27.1
23.1
45
225
84
440
Gas pipe 9.52(flared)3/8
Liquid pipe 6.35(flared)1/4
C unit connection
B unit connection
A unit connection
13
MXZ-3C54VA MXZ-3C68VA Unit: mm

13
100 or more
500 or more
350 or more350 or more
100 or more
500 or more
100 or more
100 or more 350 or more
200 or more
500 or more
Service space
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave front and overhead
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
2.Service space
Air in
Air in
Air out
(Base bolt M10)
4-10 x 21 Oval hole
3- 33 Drain hole
(Bolt Pitch)
171500
360.6
18.312.3
16.8
31.3
63.2 288233.1
169
396
17.7 17.7
9.52(flared)3/8(B,C,D unit)
Liquid pipe 6.35(flared)1/4
330 1330
66.3
Indoor and outdoor
connect wiring
39 x 27 hole
27.1
23.1
440
45
31584
299
360
710
840 30
200
240
D unit connection
C unit connection
B unit connection
A unit connection
12.7(flared)1/2(A unit)
Gas pipe
MXZ-4C71VA Unit: mm

14
MXZ-4C80VA MXZ-5C100VA Unit: mm
460
317
900
Air out
900
Handle Handle
35
74
200 200500
35 250 270
355
(Bolt pitch)
387
40 27
16
16 11
24
3- 33 Drain hole
(Base bolt M10)
(Base bolt M10)
2-U Shaped notched hole
2-12 x 36 Oval hole
Air in
Air in
B
A
100 or more
500 or more
350 or more350 or more
100 or more
500 or more
100 or more
100 or more 350 or more
200 or more
500 or more
Service space
32030 10
88
Gas pipe
12.7(flared) 1/2 (A unit)
9.52(flared) 3/8 (B,C,D,E (MXZ-5C100VA) unit)
6.35(flared)1/4
Liquid pipe
D unit connection
E unit connection (MXZ-5C100VA)
C unit connection
B unit connection
A unit connection
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave front and overhead
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
2.Service space
23
597
132 405
45
Indoor and
outdoor
connect
wiring
(35 x 53) hole

15
MXZ-6C120VA Unit: mm
548
340
900
Air out
1070
Handle
48
200 200500
450
355
(Bolt pitch)
40 27
16
16 11
24
42 Drain hole (Base bolt M10)
(Base bolt M10)
2-U Shaped notched hole
2-12 x 36 Oval hole
Air in
Air in
100 or more
500 or more
350 or more350 or more
100 or more
500 or more
100 or more
100 or more 350 or more
200 or more
500 or more
Service space
320
21 5
70
Gas pipe
12.7(flared) 1/2 (A unit)
9.52(flared) 3/8 (B,C,D,E,F unit)
6.35(flared)1/4
Liquid pipe
D unit connection
E unit connection
C unit connection
B unit connection
A unit connection
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave front and overhead
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
2.Service space
34
730
125
515
45 65
Indoor and
outdoor
connect
wiring
(36 x 96) hole F unit connection
387

16
WIRING DIAGRAM
6
MXZ-3C54VA

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MXZ-4C71VA

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MXZ-5C100VA