Table of Contents
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SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Models
MSZ-HJ25VA
MSZ-HJ35VA
MSZ-HJ50VA
MSZ-HJ60VA
MSZ-HJ71VA
MSZ-HJ25VA
MSZ-HJ35VA
MSZ-HJ50VA
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
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E1
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CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES ··························7
5. OUTLINES AND DIMENSIONS ·····················9
6. WIRING DIAGRAM ··································· 10
7. REFRIGERANT SYSTEM DIAGRAM ··········· 11
8. SERVICE FUNCTIONS ······························ 13
9. MICROPROCESSOR CONTROL ················ 15
10. TROUBLESHOOTING ······························· 19
11. DISASSEMBLY INSTRUCTIONS ················· 32
PARTS CATALOG (OBB647)
Revision C:
• MSZ-HJ60VA-
,
and
E1
ER1
MSZ-HJ71VA-
,
have been added.
E1
ER1
Please void OBH647 REVISED EDITION-B.
No. OBH647
REVISED EDITION-C
Outdoor unit service manual
MUZ-HJ·VA Series (OBH648)
MXZ-HJ•VA Series
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi MSZ-HJ60VA
Summarization of Contents
2 PART NAMES AND FUNCTIONS
Accessories
List of included accessories for the indoor unit.
8 SERVICE FUNCTIONS
Timer Short Mode
Shortens the compressor start time for service operations.
PC Board Modification for Individual Operation
Procedure to modify the remote controller PC board for multi-unit control.
Auto Restart Function
Memorizes and resumes operation mode after power interruption.
Emergency and Test Operation
Procedure for unit operation during servicing or emergencies.
3-Minute Time Delay Operation
Protects compressor from overload by delaying restart.
9 MICROPROCESSOR CONTROL
Wireless Remote Controller Functions
Details on remote controller buttons, display, and operations.
Indoor Unit Display Indicators
Explanation of the operation indicator lamp's status lights.
Cooling Operation Modes
Covers COOL mode, including coil frost prevention.
Dry Operation Modes
Details DRY operation mode, including coil frost prevention.
Heating Operation Modes
Covers HEAT mode, including cold air prevention and defrosting.
Auto Vane Operation
Controls horizontal vane movement for optimal air distribution.
Timer Operation
Setting and releasing ON/OFF timers for the air conditioner.
10 TROUBLESHOOTING
Troubleshooting Precautions
Essential safety and procedural guidelines before starting troubleshooting.
Failure Mode Recall and Analysis
Methods to recall and interpret abnormal conditions for diagnosis.
Component Trouble Criteria
Check methods and criteria for main internal components.
Specific Troubleshooting Flows
Step-by-step guides for diagnosing common unit issues.
Electromagnetic Noise Issues
Diagnosing and resolving electromagnetic noise interference.
11 DISASSEMBLY INSTRUCTIONS
Panel Removal
Procedure for removing the front panel of the indoor unit.
Electrical Box and PC Board Removal
Steps to remove the indoor power and electronic control PC boards.
Indoor Electronic Control PC Board and Vane Motor Removal
Procedures for removing the indoor electronic control PC board and vane motor.
Fan Motor, Coil Thermistor, and Fan Removal
Steps to remove the indoor fan motor, coil thermistor, and line flow fan.
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