Mitsubishi Electric MS-A24VD-K1 User Manual

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. TROUBLESHOOTING······································12
9. DISASSEMBLY INSTRUCTIONS ····················21
10. PARTS LIST······················································23
11. RoHS PARTS LIST···········································26
SPLIT-TYPE AIR CONDITIONERS
TM
MS-A18VD
MS-A24VD
MS-A30VD
NOTE:
• This service manual describes technical data of the indoor units.
• RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
SERVICE MANUAL
Models
MS-A18VD-
MS-A18VD-
MS-A24VD-
MS-A24VD-
MS-A30VD-
MS-A30VD-
K2
K1
K2
K1
K2
K1
No. OB400
REVISED EDITION-C
INDOOR UNIT
Outdoor unit service manual
MU-A·VD Series (OB401)
Revision C:
• Another type of the electronic control P.C.
board (TYPE 2) has been added to the
original one (TYPE 1). They are both com-
patible with MS-A18/24/30VD- .
K
Please void OB400, REVISED EDITION-B.
OB400C--1.qxp 11.7.11 9:10 AM Page 1

Mitsubishi Electric MS-A24VD-K1 Specifications

General

Brand	Mitsubishi Electric
Model	MS-A24VD-K1
Category	Air Conditioner
Language	English

Summary

Indoor Unit Service Manual

Included Accessories

Remote Controller Operation

Explains the functions and buttons of the remote controller.

Specifications

Electrical and Fan Motor Specifications

Outlines and Dimensions

Indoor Unit Dimensions and Piping

Illustrates indoor unit dimensions, mounting plate, and piping connections.

Wiring Diagrams

Wiring Diagram for MS-A18VD/A24VD-K1

Illustrates the electrical wiring connections for MS-A18VD and MS-A24VD models (K1 type).

Wiring Diagram for MS-A18VD/A24VD-K2

Illustrates the electrical wiring connections for MS-A18VD and MS-A24VD models (K2 type).

Refrigerant System Diagram

Refrigerant System for MS-A18VD

Illustrates the refrigerant circuit and components for the MS-A18VD model.

Refrigerant System for MS-A24VD

Illustrates the refrigerant circuit and components for the MS-A24VD model.

Refrigerant System for MS-A30VD

Illustrates the refrigerant circuit and components for the MS-A30VD model.

Troubleshooting

Troubleshooting Cautions

Important precautions to take before and during troubleshooting procedures.

Troubleshooting Procedure Steps

Outlines the general steps for diagnosing and resolving issues.

Troubleshooting Flowchart

Troubleshooting by Flash Codes

Guides troubleshooting based on specific flash codes from the operation indicator.

Troubleshooting Check Table

Abnormal Point and Symptom Guide

Lists abnormal points, symptoms, conditions, and remedies for fault diagnosis.

Trouble Criterion for Main Parts

Part Testing Methods and Criteria

Details how to measure and check resistance/voltage for key components.

Troubleshooting Flowcharts

Indoor Fan Motor Troubleshooting Flow

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

Remote Controller/Receiver Troubleshooting Flow

Indoor Electronic Control PC Board Check

PC Board Visual Inspection and Power Off

Mis-Wiring Check Procedure

Mis-Wiring Troubleshooting Flowchart

Step-by-step flowchart for diagnosing and correcting mis-wiring issues.

Test Point Diagrams and Voltage Readings

Type 1 PC Board Test Points

Thermistor Resistance Chart

Disassembly Instructions

Disassembly Steps Overview

PC Board and Receiver Removal

Parts List (Non-RoHS Compliant)

Indoor Unit Structural Parts List

Indoor Unit Heat Exchanger Parts List

Indoor Unit Functional and Electrical Parts

Functional and Electrical Parts Details

RoHS Indoor Unit Functional/Electrical Parts

RoHS Functional/Electrical Parts Details