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
ER1
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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-HJ71VA
Summarization of Contents
Part Names and Functions
Accessory Parts Identification
Lists and identifies all included accessory parts for the indoor unit.
Service Functions
Service Timer Mode Adjustment
Shortens the timer setting for faster service checks.
PC Board Modification for Multi-Unit Control
Modifies PC boards for individual unit control with multiple units.
Auto Restart Function Configuration
Enables/disables automatic unit restart after power interruption.
Microprocessor Control
Wireless Remote Controller Overview
Details the functions and display of the wireless remote controller.
Indoor Unit Status Indicators
Explains the meaning of the operation indicator lamp.
Operating Modes: Cool, Dry, Heat
Describes the setup and features of cooling, drying, and heating operations.
Automatic Airflow Direction Control
Details the horizontal vane operation and auto mode.
Setting On/Off Timers
Instructions for setting the unit's timer functions.
Emergency, Test, and Time Delay Functions
Covers emergency operation, test runs, and compressor time delay.
Troubleshooting
Troubleshooting Safety Precautions
Important safety warnings and procedures before starting troubleshooting.
Failure Mode Recall Function Usage
How to recall and interpret stored error codes for diagnosis.
Troubleshooting Workflow Guide
Flowchart and instructions for diagnosing unit malfunctions.
Troubleshooting Error Code Table
Table correlating indicator patterns with specific faults and remedies.
Main Part Troubleshooting Criteria
Methods and criteria for checking key internal components.
Indoor Fan Motor Troubleshooting Flow
Step-by-step guide to diagnose indoor fan motor issues.
Test Point and Voltage Reference
Diagrams and voltage values for electrical troubleshooting.
Disassembly Instructions
Disassembly Procedures for MSZ-HJ25/35/50VA Models
Step-by-step guide for disassembling specific MSZ-HJ models.
Disassembly Procedures for MSZ-HJ60/71VA Models
Step-by-step guide for disassembling specific MSZ-HJ models.
Indoor Coil Thermistor Mounting
Instructions for correctly mounting the indoor coil thermistor.
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