Mitsubishi MSZ-GA50VA User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················9
8. SERVICE FUNCTIONS ····································10
9. TROUBLESHOOTING······································12
10. DISASSEMBLY INSTRUCTIONS·····················24
11. PARTS LIST······················································27
12. RoHS PARTS LIST···········································28
13. OPTIONAL PARTS···········································30
Wireless type
Models
MSZ-GA50VA -
MSZ-GA60VA -
MSZ-GA71VA -
E1
E1
E1
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
INDOOR UNIT
No. OB388
REVISED EDITION-C
Please void OB388 REVISED EDITION-B
Revision:C
• PARTS LIST and RoHS PARTS LIST have been
changed.
Outdoor unit service manual
MUZ-GA•VA Series (OB389)
MXZ-A•VA Series (OB377)
OB388C.qxp 06.12.25 11:04 AM Page 1

Mitsubishi MSZ-GA50VA Specifications

General

Type	Split System
Cooling Capacity	5.0 kW
Heating Capacity	5.8 kW
Power Supply	220-240 V, 50 Hz
Refrigerant	R410A
Outdoor Unit Dimensions (W x H x D)	800 x 550 x 285 mm
Weight (Indoor Unit)	10 kg

Summary

Technical Changes

Technical Updates Overview

Details specific technical modifications and updates across various components and functions of the air conditioner.

Part Names and Functions

Indoor Unit Component Identification

Identifies and illustrates the various parts of the indoor unit and their functions.

Remote Controller Operation

Product Specifications

Model-Specific Performance Data

Provides detailed electrical data, dimensions, and performance specifications for each model.

Wiring Diagram

Indoor Unit Electrical Schematics

Refrigerant System Diagram

Refrigerant Flow and Component Layout

Service Functions

Timer and Auto-Restart Settings

Explains timer shortening, auto-restart function, and PC board modification for multi-unit control.

Troubleshooting Guide

General Troubleshooting & Cautions

Safety guidelines, initial checks, and general troubleshooting procedures for the unit.

Failure Mode Recall & Indicator Interpretation

How to use the failure recall function and interpret LED error indications for diagnostics.

Specific Issue Diagnosis & Flowcharts

Diagnostic flowcharts for common problems, including signal and operation errors.

Component Testing & Diagnostic Criteria

Methods for checking key component resistance and voltage, along with diagnostic criteria.

Disassembly Instructions

Front Panel & External Cover Removal

Internal Board & Connector Removal

Motor and Fan Assembly Disassembly

Parts List (Non-RoHS)

RoHS Parts List