Mitsubishi Electric MXZ-3E54VA-E1 User manual

HFC
utilized
R410A
SERVICE MANUAL
No. OBH723
REVISED EDITION-D
OUTDOOR UNIT
NOTE:
RoHS compliant products have <G> mark
on the spec name plate.
PARTS CATALOG (OBB723)
Models
MXZ-3E54VA - E1 , ET1 , ER1
MXZ-3E68VA - E1 , ET1 , ER1
MXZ-4E72VA - E1 , ET1 , ER1
MXZ-4E83VA - E1 , E2 , E3 , ET1 , ET2 , ET3 , ER1 , ER2
MXZ-5E102VA - E1 , E2 , E3 , ET1 , ET2 , ET3 , ER1 , ER2
MXZ-2E53VAHZ - E1 , ER1
MXZ-4E83VAHZ - E1 , E2 , ER1 , ER2
Indoor unit service manual
MSZ-EF•VE Series (OBH589)
MSZ-SF•VA Series (OBH555)
MSZ-SF•VE Series (OBH600)
MSZ-FD•VA Series (OBH488)
MSZ-FH•VE Series (OBH623)
MSZ-GA•VA Series (OB378)
MSZ-GE•VA Series (OBH515)
MSZ-GF•VE Series (OBH634)
MFZ-KA•VA Series (OB409)
MFZ-KJ•VE Series (OBH666)
MLZ-KA•VA Series (OBH483)
SLZ-KA•VA Series (OC320)
SEZ-KD•VA Series (HWE07110)
PLA-RP•BA Series (OCH412)
PCA-RP•KA Series (OCH454)
PEAD-RP•JA Series (HWE08130)
CONTENTS
1. TECHNICAL CHANGES ···································3
2. PART NAMES AND FUNCTIONS ·····················4
3. SPECIFICATION ················································5
4. NOISE CRITERIA CURVES ····························12
5. OUTLINES AND DIMENSIONS ······················14
6. WIRING DIAGRAM ··········································20
7. REFRIGERANT SYSTEM DIAGRAM ·············44
8. PERFORMANCE CURVES ·····························52
9. ACTUATOR CONTROL ···································82
10. SERVICE FUNCTIONS ····································83
11. TROUBLESHOOTING ·····································86
12. DISASSEMBLY INSTRUCTIONS ··················108
INDOOR UNITS COMBINATION SHEETS
MXZ-4E83VA
MXZ-5E102VA
MXZ-2E53VAHZ
OBH723 REVISED EDITION-C is void.
Revision D:
• MXZ-4E83VA- E3 , ET3 , ER2 , MXZ-5E102VA-
E3 , ET3 , ER2 and MXZ-4E83VAHZ- E2 , ER2
have been added.

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.
Use the specif ed 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 A:
• MXZ-2E53VAHZ- E1 and MXZ-4E83VAHZ- E1 have been added.
• Values of air flow and fan speed for MXZ-5E102VA- E1 , ET1 have been modified.
Revision B:
• MXZ-3E54VA- E1 , ET1 , MXZ-3E68VA- E1 , ET1 , and MXZ-4E72VA- E1 , ET1 have been added.
Revision C:
• MXZ-3E54VA- ER1 , MXZ-3E68VA- ER1 , MXZ-4E72VA- ER1 , MXZ-4E83VA- E2 , ET2 , ER1 , MXZ-5E102VA- E2 , ET2 , ER1 ,
MXZ-2E53VAHZ- ER1 and MXZ-4E83VAHZ- ER1 have been added.
Revision D:
• MXZ-4E83VA- E3 , ET3 , ER2 , MXZ-5E102VA- E3 , ET3 , ER2 and MXZ-4E83VAHZ- E2 , ER2 have been added.
OBH723D

3
TECHNICAL CHANGES
1
MXZ-4E83VA - E1 , ET1 , ER1
MXZ-5E102VA - E1 , ET1 , ER1
1. New model
MXZ-2E53VAHZ - E1 , ER1
1. New model
MXZ-4E83VAHZ - E1 , ER1
1. New model
MXZ-3E54VA - E1 , ET1 , ER1
MXZ-3E68VA - E1 , ET1 , ER1
MXZ-4E72VA - E1 , ET1 , ER1
1. New model
MXZ-4E83VA - E1 , ET1 MXZ-4E83VA - E2 , ET2
1. Fan motor has been changed.
2. Outdoor control P.C. board has been changed.
MXZ-5E102VA - E1 , ET1 MXZ-5E102VA - E2 , ET2
1. Fan motor has been changed.
2. Outdoor control P.C. board has been changed.
MXZ-4E83VA - ER1 MXZ-4E83VA -ER2
1. Outdoor control P.C. board has been changed.
MXZ-4E83VA - E2 , ET2 MXZ-4E83VA - E3 , ET3
1. Outdoor control P.C. board has been changed.
MXZ-5E102VA - ER1 MXZ-5E102VA -ER2
1. Outdoor control P.C. board has been changed.
MXZ-5E102VA - E2 , ET2 MXZ-5E102VA - E3 , ET3
1. Outdoor control P.C. board has been changed.
MXZ-4E83VAHZ - E1 , ER1 MXZ-4E83VAHZ - E2 , ER2
1. Outdoor control P.C. board has been changed.
OBH723D

4
PART NAMES AND FUNCTIONS
2
MXZ-4E83VA
MXZ-5E102VA
MXZ-2E53VAHZ
Air outlet
Drain outlet
Air inlet
(Back and side)
ACCESSORIES
Model
MXZ-3E54VA
MXZ-3E68VA
MXZ-4E72VA
MXZ-4E83VA
MXZ-5E102VA
Drain socket 1 1
Drain cap 2 5
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-4E83VAHZ
Air outlet
Drain outlet
Air inlet
(Back and side)
MXZ-3E54VA
MXZ-3E68VA
MXZ-4E72VA
OBH723D

5
SPECIFICATION
3
Outdoor model MXZ-3E54VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 3
Piping total length m Max. 50
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 5.4 (2.9 - 6.8) 7.0 (2.6 - 9.0)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 1,350 1,590
Running current (Total) 1, 2 A 5.9 7.0
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 7.0
Coeff cient of performance (C.O.P) (Total) 1, 2 4.00 4.40
Compressor
Model SNB130FGBH1T
Output W 1,400
Current 1, 2 A 5.72 6.62
Refrigeration oil (Model) L 0.7 (NEO22)
Fan motor
Model SIC-71FW-F764-2
Current 1, 2 A 0.2
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 58
Special
remarks
Air f ow (Rated) m3 /h 2,334 2,376
Sound level (Rated) dB(A) 50 53
Fan speed (Rated) rpm 650 660
Refrigerant f lling capacity (R410A) kg 2.7
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

6
Outdoor model MXZ-3E68VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 3
Piping total length m Max. 60
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 6.8 (2.9 - 8.4) 8.6 (2.6 - 10.6)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 2,190 2,380
Running current (Total) 1, 2 A 9.6 10.5
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 10.5
Coeff cient of performance (C.O.P) (Total) 1, 2 3.11 3.61
Compressor
Model SNB172FEGH1T
Output W 1,800
Current 1, 2 A 9.22 10.12
Refrigeration oil (Model) L 0.7 (NEO22)
Fan motor
Model SIC-71FW-F764-2
Current 1, 2 A 0.2
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 58
Special
remarks
Air f ow (Rated) m3 /h 2,334 2,376
Sound level (Rated) dB(A) 50 53
Fan speed (Rated) rpm 650 660
Refrigerant f lling capacity (R410A) kg 2.7
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF25VE + MSZ-EF25VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

7
Outdoor model MXZ-4E72VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 4
Piping total length m Max. 60
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 7.2 (3.7 - 8.8) 8.6 (3.4 - 10.7)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 2,250 2,280
Running current (Total) 1, 2 A 9.9 10.0
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 10.0
Coeff cient of performance (C.O.P) (Total) 1, 2 3.20 3.77
Compressor
Model SNB172FEGH1T
Output W 2,000
Current 1, 2 A 9.46 9.56
Refrigeration oil (Model) L 0.7 (NEO22)
Fan motor
Model SIC-71FW-F764-2
Current 1, 2 A 0.2
Dimensions W x H x D mm 840 x 710 x 330
Weight kg 59
Special
remarks
Air f ow (Rated) m3 /h 2,334 2,376
Sound level (Rated) dB(A) 50 53
Fan speed (Rated) rpm 650 660
Refrigerant f lling capacity (R410A) kg 2.7
1 Measured under rated operating frequency.
2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

8
Outdoor model MXZ-4E83VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 4
Piping total length m Max. 70
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 8.3 (3.7 - 9.2) 9.3 (3.4 - 11.6)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 2,440 2,000
Running current (Total) 1, 2 A 10.7 8.8
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 10.7
Coeff cient of performance (C.O.P) (Total) 1, 2 3.40 4.65
Compressor
Model SNB220FAGMC
Output W 2,200
Current 1, 2 A 10.1 8.1
Refrigeration oil (Model) L 0.7 (FV50S)
Fan motor
Model E1 , ET1 : SIC-81FW-D888-9
E2 , ET2 , ER1 , E3 , ET3 , ER2 : SIC-88FWJ-D888-1
Current 1, 2 A 0.3
Dimensions W x H x D mm 950 x 796 x 330
Weight kg E1 , ET1 : 62 / E2 , ET2 , ER1 , E3 , ET3 , ER2 : 63
Special
remarks
Air f ow (Rated) m3 /h 3,336 3,336
Sound level (Rated) dB(A) 49 51
Fan speed (Rated) rpm 620 620
Refrigerant f lling capacity (R410A) kg 2.99
1 Measured under rated operating frequency.
2 When connected with below indoor units.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF25VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

9
Outdoor model MXZ-5E102VA
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 5
Piping total length m Max. 80
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 10.2 (3.9 - 11.0) 10.5 (4.1 - 14.0)
Breaker capacity A 25
Electrical
data
Power input (Total) 1, 2 W 3,150 2,340
Running current (Total) 1, 2 A 13.8 10.3
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 13.8
Coeff cient of performance (C.O.P) (Total) 1, 2 3.24 4.49
Compressor
Model SNB220FAGMC
Output W 2,800
Current 1, 2 A 13.0 9.4
Refrigeration oil (Model) L 0.7 (FV50S)
Fan motor
Model E1 , ET1 : SIC-81FW-D888-9
E2 , ET2 , ER1 , E3 , ET3 , ER2 : SIC-88FWJ-D888-1
Current 1, 2 A 0.5
Dimensions W x H x D mm 950 x 796 x 330
Weight kg E1 , ET1 : 63 / E2 , ET2 , ER1 , E3 , ET3 , ER2 : 64
Special
remarks
Air f ow (Rated) m3 /h E1
,
ET1
: 3,336 /
E2
,
ET2
,
ER1
, E3 , ET3 , ER2 : 3,906
4,080
Sound level (Rated) dB(A) 52 56
Fan speed (Rated) rpm E1 , ET1 : 620 /
E2 , ET2 , ER1
, E3 , ET3 , ER2 : 720 750
Refrigerant f lling capacity (R410A) kg 2.99
1 Measured under rated operating frequency.
2 When connected with below indoor units.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF22VE + MSZ-EF22VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

10
Outdoor model MXZ-2E53VAHZ
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2
Piping total length m Max. 30
Connecting pipe length m Max. 20
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 5.3 (1.1 - 6.0) 6.4 (1.0 - 7.0)
Breaker capacity A 16/25 3
Electrical
data
Power input (Total) 1, 2 W 1,290 1,360
Running current (Total) 1, 2 A 5.7 6.0
Power factor (Total) 1, 2% 98
Starting current (Total) 1, 2 A 6.0
Coeff cient of performance (C.O.P) (Total) 1, 2 4.11 4.71
Compressor
Model SNB220FAGMC
Output W 1,400
Current 1, 2 A 5.3 5.5
Refrigeration oil (Model) L 0.7 (FV50S)
Fan motor
Model E1
: SIC-81FW-D888-9, SIC-88FWJ-D888-1
ER1
: SIC-88FWJ-D888-1
Current 1, 2 A 0.3
Dimensions W x H x D mm 950 x 796 x 330
Weight kg 61
Special
remarks
Air f ow (Rated) m3 /h 2,820 2,820
Sound level (Rated) dB(A) 45 47
Fan speed (Rated) rpm 520 520
Refrigerant f lling capacity (R410A) kg 2.0
1 Measured under rated operating frequency.
2 When connected with below indoor units.
3 When the amount of current exceeds the allowed value.
MSZ-EF18VE + MSZ-EF35VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

11
Outdoor model MXZ-4E83VAHZ
Outdoor unit power supply Single phase
230 V, 50 Hz
System
Indoor units number 2 to 4
Piping total length m Max. 70
Connecting pipe length m Max. 25
Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.
Function Cooling Heating
Capacity Rated frequency (Min.-Max.) 2 kW 8.3 ( 3.5 - 9.2 ) 9.0 ( 3.5 - 11.6 )
Breaker capacity A 25/30 3
Electrical
data
Power input (Total) 1, 2 W 2,250 1,900
Running current (Total) 1, 2 A 9.9 8.3
Power factor (Total) 1, 2% 99
Starting current (Total) 1, 2 A 9.9
Coeff cient of performance (C.O.P) (Total) 1, 2 3.68 4.73
Compressor
Model MNB33FBTMC-L
Output W 2,200
Current 1, 2 A 9.30 7.60
Refrigeration oil (Model) L 1.10 (FV50S)
Fan motor
Model SIC-81FW-D888-9, SIC-88FWJ-D888-1
Current 1, 2 A 0.3
Dimensions W x H x D mm 950 x 1,048 x 330
Weight kg 87
Special
remarks
Air f ow (Rated) m3 /h 3,780 4,620
Sound level (Rated) dB(A) 53 57
Fan speed (Rated) rpm 650 770
Refrigerant f lling capacity (R410A) kg 3.9
1 Measured under rated operating frequency.
2 When connected with indoor units below.
3 When the amount of current exceeds the allowed value.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF25VE
NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)
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
OBH723D

12
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
49
SPL(dB(A))
51
LINE
OUTDOOR UNIT
MICROPHONE
1m Test conditions
Cooling :Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C
Heating :Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C
MXZ-4E83VA
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
50
SPL(dB(A))
53
LINE
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
50
SPL(dB(A))
53
LINE
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
50
SPL(dB(A))
53
LINE
MXZ-3E54VA MXZ-3E68VA
MXZ-4E72VA
OBH723D

13
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
52
SPL(dB(A))
56
LINE
MXZ-5E102VA
MXZ-4E83VAHZ
MXZ-2E53VAHZ
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
53
SPL(dB(A))
57
LINE
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
CoolingHigh
FUNCTION FAN SPEED
HeatingHigh
45
SPL(dB(A))
47
LINE
OBH723D

14
OUTLINES AND DIMENSIONS
5
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
500 or more
100 or more
Note : Leave front and overhead
free of obstruction.
100 or more 350 or more
200 or more
500 or more
2.Service space
100 or more
500 or more
350 or more
350 or more
100 or more
Service space
MXZ-3E54VA MXZ-3E68VA
Unit: mm
OBH723D

15
1.Installation space
Note : Leave front and both sides
free of obstruction.
Note : Leave rear, overhead and
both sides free of obstruction.
500 or more
100 or more
Note : Leave front and overhead
free of obstruction.
100 or more 350 or more
200 or more
500 or more
2.Service space
100 or more
500 or more
350 or more
350 or more
100 or more
Service space
MXZ-4E72VA
Unit: mm
OBH723D

16
MXZ-4E83VA
Unit: mm
Air in
Air in
Air in
Air out
OBH723D

17
MXZ-5E102VA
Unit: mm
Air in
Air in
Air in
Air out
OBH723D

18
Unit: mm
MXZ-2E53VAHZ
OBH723D

19
MXZ-4E83VAHZ
Unit: mm
OBH723D

20
MXZ-3E54VA - E1 MXZ-3E54VA - ET1 MXZ-3E54VA - ER1
MXZ-3E68VA - E1 MXZ-3E68VA - ET1 MXZ-3E68VA - ER1
WIRING DIAGRAM
6
t° 21S4
t°°t°t
L
MS
3~
t°
RT64
M
LEV R LEV C LEV ALEV B
RT62
RT61
X714
X712
F711
TO INDOOR UNIT No.C TO INDOOR UNIT No.A TO INDOOR UNIT No.B
TB2
TB3
TB4
12-24V
~230V ~230V
12-24V
~230V
12-24V
RT68 RT65
MMM
MS
3~
MF
T801
BLK
WHT
RED RED
WHT
BLK
U
V
W
MC
CB3 CB2 CB1
BOARD
POWER P.C.
OUTDOOR
OUTDOOR CONTROL P.C. BOARD
F1
F2
TB1 BREAKER
CIRCUIT
POWER SUPPLY ~/N 230V 50Hz
IC801
5
HPS
CN63H
13
16
CN797
CN714
12
CNAC
CN712
12
S1 S2 S3 S1 S2 S3 S1 S2 S3
15
CN741
D1
IC401
IC402
2
1
CN171
18
CNTH1
2
1
CNTH2
555
CNMC
1551
1
7
1
CN792 CN791CN793
15
5
7
1
CNF1 CN702
13
CNDC
U
V
W
1
3
1
CN151
17
CNDC CNAC2
CN701
2
1
12
CN152
IC501 IC411
TAB4
TAB6 TAB5 TAB3
X52C
3
5
CN601
1
3
CN611
1
TAB1
TAB2
3
1
CNAC1
3TBE4 TBE2 TBE1
PTC1
PTC2
X65
L N
(BLU) BLK
BLU RED
BLK BLU WHT
BLK BLU ORN
BLK
BLK
BRN
BLK
BLK
(RED) (WHT)
(BLU)
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLU
RED BLU BLK
BLK
BLK
BLK
BLK BLU
GRN/YLW
WHT ORN
+++
LEV A~C,R
MC
MF
PTC1,2
RT61 RT62
X52C
X65
X712 X714 21S4
RELAY RELAY RELAY RELAY REVERSING VALVE SOLENOID COIL
DEFROST THERMISTOR
FIN TEMP. THERMISTOR
AMBIENT TEMP. THERMISTOR OUTDOOR HEAT EXCHANGER TEMPERATURE THERMISTOR TRANSFORMER TERMINAL BLOCK
RT64 RT65 RT68
T801
TB1~4
FAN MOTOR
COMPRESSOR
EXPANSION VALVE COIL
DISCHARGE TEMP. THERMISTOR
SMOOTHING CAPACITOR DIODE FUSE(T6.3AL250V) FUSE(T6.3AL250V) FUSE(T3.15AL250V) HIGH PRESSURE SWITCH
CB1~3
D1
F1 F2
F711
HPS
CIRCUIT PROTECTION
NOTES: 1.About the indoor side electric wiring refer to the indoor unit electric wiring diagram for servicing. 2.Use copper conductors only (For field wiring). 3.Symbols below indicate. :Terminal block :Connector
SYMBOL NAME SYMBOL SYMBOL SYMBOL
NAME NAME NAME SYMBOL NAME
DIODE BRIDGE
POWER FACTOR CONTROLLER POWER MODULE POWER DEVICE REACTOR LED
IC401,402
IC411 IC501 IC801
L
LED1~3
LED3 LED2 LED1
OBH723D