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

Mitsubishi Electric MXZ-3C54VA Specifications

General

Brand	Mitsubishi Electric
Model	MXZ-3C54VA
Category	Air Conditioner
Language	English

Summary

1. TECHNICAL CHANGES

3. SPECIFICATION

5. OUTLINES AND DIMENSIONS

1.Installation space

Provides guidelines for the required clearance around the outdoor unit for proper installation.

2.Service space

Provides guidelines for the required clearance around the outdoor unit for service access.

6. WIRING DIAGRAM

7. REFRIGERANT SYSTEM DIAGRAM

MAX REFRIGERANT PIPING LENGTH

Details the maximum allowable refrigerant piping lengths for different indoor unit configurations.

ADDITIONAL REFRIGERANT CHARGE

Specifies the additional refrigerant charge required based on piping length.

10. SERVICE FUNCTIONS

10-1. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)

Allows locking the operation mode to COOL or HEAT for continuous operation in that mode.

10-2. LOWERING THE OPERATING NOISE OF THE OUTDOOR UNIT

Lowers outdoor unit noise during small load operation, potentially affecting capacity.

10-3. PRE-HEAT CONTROL

Energizes compressor winding to prevent refrigerant liquefaction, consuming about 50W.

11. TROUBLESHOOTING

11-1. CAUTIONS ON TROUBLESHOOTING

11-2. FAILURE MODE RECALL FUNCTION

Allows recalling memorized abnormal conditions for diagnosis, useful for intermittent issues.

11-4. TROUBLESHOOTING CHECK TABLE

11-5. TROUBLE CRITERION OF MAIN PARTS

11-6. TROUBLESHOOTING FLOW

Check of power supply

How to check inverter/compressor

11-7. TEST POINT DIAGRAM AND VOLTAGE

1. Outdoor electronic control P.C. board

MXZ-4C80VA MXZ-5C100VA

2. Outdoor control P.C. board

4. Outdoor Power board

MXZ-6C120VA Outdoor control P.C. board

12. DISASSEMBLY INSTRUCTIONS

12-1. MXZ-3C54VA MXZ-3C68VA MXZ-4C71VA