Mitsubishi Electric MU-GA50VB - User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························8
5. OUTLINES AND DIMENSIONS ·························9
6. WIRING DIAGRAM ··········································10
7. REFRIGERANT SYSTEM DIAGRAM··············12
8. PERFORMANCE CURVES······························15
9. TROUBLESHOOTING······································23
10. DISASSEMBLY INSTRUCTIONS·····················30
11. PARTS LIST······················································36
Wireless type
Models
MU-GA50VB -
MU-GA60VB -
MU-GA80VB -
E1
E1
E1
SPLIT-TYPE, AIR CONDITIONERS
MU-GA50VB -
E1
Indication of model name
NOTE:
•This service manual describes technical data of outdoor units.
As for indoor units MS-GA50VB - , MS-GA60VB - and MS-GA80VB - , refer to the service
manual OB369.
E1E1E1
No. OB370
HFC
utilized
R410A
OB370-1.qxp 04.10.14 1:45 PM Page 1

Summary

Technical Changes and R410 A Refrigerant

R410 A Refrigerant Comparison

Compares R410A properties with R22, including handling and safety.

Unit Specifications and Performance

Performance Data Tables

Presents detailed cooling performance metrics across various indoor/outdoor conditions.

Wiring Diagrams

MU-GA50 VB;GA60 VB Wiring

MU-GA80 VB Wiring Diagram

Refrigerant System Details

Performance Curves and Graphs

General Performance Curves

Outdoor Unit Operating Characteristics

Troubleshooting Guide

Troubleshooting Cautions and Procedures

Lists safety warnings and initial steps for diagnosing unit malfunctions.

Fault Code Diagnosis Flow

Guides technicians through diagnosing specific error codes indicated by the indoor unit lamp.

Component Resistance Checks

Specifies resistance values for critical components to identify failures.

Troubleshooting Flowcharts

Provides detailed step-by-step troubleshooting flows for specific issues.

Disassembly Instructions

MU-GA50 VB Outdoor Unit Disassembly

MU-GA60 VB Outdoor Unit Disassembly

MU-GA80 VB Outdoor Unit Disassembly

Parts List

Mitsubishi Electric MU-GA50VB Specifications