Mitsubishi Electric MS-GH13VA - User Manual

Models
MS-GH13VA
-
KU1
,
KU2
,
KU2
U
MS-GH18VA
-
KU1
,
KU2
,
KU2
U
MS-GH24VA
-
KU1
MS-GH30VA
-
KU1
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································5
4. OUTLINES AND DIMENSIONS ·····················6
5. WIRING DIAGRAM ·····································7
6. REFRIGERANT SYSTEM DIAGRAM ·············9
7. SERVICE FUNCTIONS ······························ 10
8. MICROPROCESSOR CONTROL ················ 12
9. TROUBLESHOOTING ······························· 19
10. DISASSEMBLY INSTRUCTIONS ················· 33
Outdoor unit service manual
MU-GH∙VA Series (OBH665)
INDOOR UNIT
PARTS CATALOG (OBB664)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
TM
SERVICE MANUAL
No. OBH664
REVISED EDITION-B
OBH664 REVISED EDITION-A is void.
Revision B:
•MS-GH13/18VA-
KU2
U have been
added.

Summary

Technical Changes and Model Updates

New Model Information and Remote Controller Updates

Details about new model additions and remote controller changes.

Part Names and Functions

MS-GH13 VA Components and Accessories

Identification of indoor unit parts and accessories for MS-GH13VA.

Specifications

Outlines and Dimensions

Wiring Diagrams

Refrigerant System Diagrams

Service Functions

Timer Short Mode for Service

Shortens the set time for service purposes.

PC Board Modification for Multiple Controllers

Modifying PC boards for individual unit operation with multiple controllers.

Auto Restart Function Operation

How the unit restarts automatically after power loss.

Microprocessor Control

Wireless Remote Controller Functions

Explains the functions and buttons of the wireless remote controller.

Indoor Unit Display and Operation Modes

Details on the operation indicator lamp and various operating modes.

Auto Vane Operation

Controls the horizontal and vertical vane movement for air direction.

Timer Operation Procedures

Setting and releasing ON/OFF timers for unit operation.

Emergency and Test Operation

Procedures for emergency or test run operations.

Troubleshooting

Troubleshooting Cautions and Procedures

Important safety precautions and general troubleshooting steps.

Failure Mode Recall Function

Recalling and displaying past error conditions.

Troubleshooting Check Table

Lists abnormal points, conditions, and remedies based on indicator lamp flashes.

Trouble Criterion of Main Parts

Resistance checks and criteria for key components.

Troubleshooting Flowchart: Indoor Fan Motor

Step-by-step guide for diagnosing indoor fan motor issues.

Troubleshooting Flowchart: Indoor Fan Motor (MS-GH18;24;30 VA)

Diagnosing indoor fan motor errors for specific models.

Remote Controller and PC Board Checks

Procedures to check remote controller and indoor electronic control board functionality.

PC Board and Fan Motor Checks (MS-GH13 VA)

Diagnosing control board and fan motor issues for MS-GH13VA.

PC Board and Fan Motor Checks (MS-GH18;24;30 VA)

Diagnosing control board and fan motor for MS-GH18/24/30VA.

Electromagnetic Noise Interference Troubleshooting

Diagnosing and resolving interference with TV and radio signals.

Test Points and Voltages: Indoor Control Board

Diagrams and voltage specifications for testing indoor control board.

Disassembly Instructions

MS-GH13 VA Panel Removal

Step-by-step instructions for removing the front panel of the MS-GH13VA.

MS-GH13 VA Component Removal

Removing indoor electronic board, terminal board, and electrical box.

MS-GH13 VA Nozzle and Vane Motor Removal

Instructions for removing nozzle assembly and vane motors.

MS-GH13 VA Fan and Coil Thermistor Removal

Steps for removing indoor fan motor, coil thermistor, and line flow fan.

MS-GH18;24;30 VA Panel Removal

Step-by-step instructions for removing the front panel of MS-GH18/24/30VA.

MS-GH18;24;30 VA Component Removal

Removing nozzle, vane motors, and related components.

MS-GH18;24;30 VA Fan and Thermistor Removal

Instructions for removing fan motor, coil thermistor, and line flow fan.

Mitsubishi Electric MS-GH13VA Specifications