Mitsubishi Electric MXZ-3E54VA User Manual

HFC
utilized
R410A
SERVICE MANUAL
No. OBH723
REVISED EDITION-C
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
,
ET1
,
ET2
,
ER1
MXZ-5E102VA
-
E1
,
E2
,
ET1
,
ET2
,
ER1
MXZ-2E53VAHZ
-
E1
,
ER1
MXZ-4E83VAHZ
-
E1
,
ER1
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 ············· 36
8. PERFORMANCE CURVES ····························· 44
9. ACTUATOR CONTROL ··································· 73
10. SERVICE FUNCTIONS ···································· 74
11. TROUBLESHOOTING ····································· 77
12. DISASSEMBLY INSTRUCTIONS ···················· 97
INDOOR UNITS COMBINATION SHEETS
MXZ-4E83VA
MXZ-5E102VA
MXZ-2E53VAHZ
Please void OBH723 REVISED EDITION-B.
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.

Mitsubishi Electric MXZ-3E54VA Specifications

General

Series	MXZ
Cooling Capacity	5.4 kW
Refrigerant	R410A
Voltage (V)	220-240
Power Supply Voltage	220-240 V
Outdoor Unit Noise Level	49 dB(A)
Hertz (Hz)	50
Power Supply Frequency	50 Hz
Phase	Single

Summary

1 TECHNICAL CHANGES

3 SPECIFICATION

6 WIRING DIAGRAM

7 REFRIGERANT SYSTEM DIAGRAM

PUMPING DOWN

10 SERVICE FUNCTIONS

10-1. PRE-HEAT CONTROL

10-2. LOCKING THE OPERATION MODE

10-3. LOWERING THE OPERATING NOISE

10-4. AUTO LINE CORRECTING

10-5. CHANGING THE AMPERE LIMIT

11 TROUBLESHOOTING

11-1. CAUTIONS ON TROUBLESHOOTING

Safety precautions and checks before starting troubleshooting.

11-2. FAILURE MODE RECALL FUNCTION

Memorizes and recalls abnormal conditions that occurred.

Troubleshooting Procedure Flowcharts

3. Outdoor unit failure mode table

Lists failure modes, LED indications, conditions, and remedies.

11-4. TROUBLESHOOTING CHECK TABLE

Details symptoms, LED indications, conditions, and remedies for various failures.

11-5. TROUBLE CRITERION OF MAIN PARTS

Details testing methods and criteria for main components.

11-6. TROUBLESHOOTING FLOW

How to check miswiring and serial signal error

Troubleshooting steps for miswiring and serial signal errors.

Check of R.V. coil

Check of LEV

How to check inverter/compressor

Procedure to check the inverter and compressor for proper operation.

Check of outdoor thermistors

Check of outdoor fan motor

Check of HPS and Bus-bar voltage

11-7. TEST POINT DIAGRAM AND VOLTAGE

Provides diagrams and voltage checks for outdoor control PC board components.

2. Outdoor power P.C. board

Details the outdoor power P.C. board layout and connections.

12 DISASSEMBLY INSTRUCTIONS

1. Removing the cabinet and the panels

Instructions for removing the cabinet and panels of the outdoor unit.

2. Removing P.C. boards and reactor

Instructions for removing the control PC board, reactor, and power PC board.

3. Removing the fan motor

Instructions for removing the outdoor fan motor and propeller fan.

4. Removing the compressor and 4-way valve

5. Removing the expansion valve

5. Removing the defrost heater