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Mitsubishi Electric MS-GK24VA User Manual

Mitsubishi Electric MS-GK24VA
44 pages
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Models
MS-GK24VA
-
KU1
,
KU2
,
KU2
U
MS-GK30VAT
-
KU1
,
KU2
,
KU2
U
MS-GK36VAT
-
KU1
,
KU2
,
KU2
U
Outdoor unit service manual
MU-GKVA(T) Series (OBH735)
INDOOR UNIT
PARTS CATALOG (OBB734)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
TM
SERVICE MANUAL
No. OBH734
REVISED EDITION-B
MS-GK24VA
MS-GK30VAT
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································5
4. OUTLINES AND DIMENSIONS ·····················6
5. WIRING DIAGRAM ·····································8
6. REFRIGERANT SYSTEM DIAGRAM ·············9
7. SERVICE FUNCTIONS ······························ 11
8. MICROPROCESSOR CONTROL ················ 13
9. TROUBLESHOOTING ······························· 21
10. DISASSEMBLY INSTRUCTIONS ················· 36
Revision B:
• MS-GK24VA-
KU2
U, MS-GK30/36
VAT-
KU2
U have been added.
OBH734 REVISED EDITION-A is void.
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Mitsubishi Electric MS-GK24VA Specifications

General IconGeneral
TypeSplit System
Power Supply220-240V, 50Hz
RefrigerantR410A
Energy Efficiency Ratio (EER)3.5
Energy Efficiency Ratio (Cooling)3.5
Indoor Unit Dimensions (W x H x D)1100 x 325 x 238 mm

Summary

Technical Changes

New Model Introduction

Details the introduction of new models and their associated changes.

Model Name Standardization

Explains changes in model naming conventions for consistency.

Remote Controller Updates

Highlights modifications made to the wireless remote controller.

Part Names and Functions

Indoor Unit Components Overview

Identifies and describes the main parts of the indoor air conditioner unit.

Included Accessories List

Lists all accessories provided with the indoor unit.

Specification

Outlines and Dimensions

MS-GK24VA/GK30VAT Dimensions and Piping

Provides detailed dimensions and piping specifications for specific models.

MS-GK36VAT Dimensions and Required Space

Details the dimensions and required installation space for the MS-GK36VAT model.

Wiring Diagram

Refrigerant System Diagram

Service Functions

Timer Short Mode Functionality

Explains how to shorten timer operation time for service purposes.

PC Board Modification for Individual Operation

Guides on modifying PC boards for multiple remote controller usage.

Auto Restart Function Control

Details how to enable or disable the auto restart feature.

Microprocessor Control

Wireless Remote Controller Operation

Describes the functions and buttons of the wireless remote controller.

Indoor Unit Display Indicators

Explains the meaning of the operation indicator lamps on the indoor unit.

Cool Operation Mode

Details the steps and conditions for the COOL operation mode.

Dry Operation Mode

Outlines the procedure and conditions for the DRY operation mode.

Fan Operation Mode

Explains how to use the fan-only operation mode.

"I Feel Control" Operation Mode

Describes the "I FEEL CONTROL" mode and its temperature settings.

Auto Vane Operation

Explains the automatic horizontal and vertical vane movements.

Timer Operation Procedures

Details how to set and release ON and OFF timers.

Emergency and Test Operation

Describes how to use the emergency and test operation modes.

3-Minute Time Delay Operation

Explains the compressor protection time delay feature.

Troubleshooting

Troubleshooting Precautions

Essential safety and handling guidelines before troubleshooting.

Failure Mode Recall Function

How to recall and interpret stored error codes or failure modes.

Troubleshooting Instruction Flow

Provides a flowchart for diagnosing unit malfunctions.

Troubleshooting Check Table

A table correlating indicator lamps with abnormal conditions and remedies.

Trouble Criterion of Main Parts

Specifies resistance criteria for diagnosing key components.

Indoor Fan Motor Troubleshooting Flow

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

Remote Controller and PC Board Troubleshooting

Guides for checking remote controller and indoor electronic control PC board.

PC Board and Fan Motor Troubleshooting

Specific checks for PC board and fan motor issues.

Miswiring and Serial Signal Error Check

Procedure for identifying miswiring and communication errors.

Electromagnetic Noise Interference Issues

Addresses issues related to electromagnetic noise affecting TV/radio.

Test Point Diagram and Voltage Checks

Provides diagrams and voltage readings for diagnostic testing.

Disassembly Instructions

MS-GK24VA/GK30VAT Disassembly Procedures

Detailed disassembly steps for MS-GK24VA and GK30VAT models.

MS-GK36VAT Disassembly Procedures

Detailed disassembly steps for the MS-GK36VAT model.

Fixing the Indoor Coil Thermistor

Guidance on correctly mounting the indoor coil thermistor.

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