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Mitsubishi Electric MSH-A24ND User Manual

Mitsubishi Electric MSH-A24ND
28 pages
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CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························5
5. WIRING DIAGRAM ············································6
6. REFRIGERANT SYSTEM DIAGRAM················7
7. SERVICE FUNCTIONS ······································8
8. TROUBLESHOOTING······································10
9. DISASSEMBLY INSTRUCTIONS ····················18
10. PARTS LIST······················································20
11. RoHS PARTS LIST···········································23
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Outdoor unit service manual
MUH-A·ND Series (OB428)
MSH-A18ND
MSH-A24ND
TM
Wireless type
Models
MSH-A18ND -
MSH-A24ND -
S1
S1
SERVICE MANUAL
INDOOR UNIT
No. OB427
REVISED EDITION-B
Please void OB427 REVISED EDITION-A.
Revision B:
•Remote controller model has been changed.
•RoHS PARTS LIST has been added.
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 (RoHS compliant).
OB427B-1.qxp 07.5.16 3:30 PM Page 1

Questions and Answers:

Mitsubishi Electric MSH-A24ND Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMSH-A24ND
CategoryAir Conditioner
LanguageEnglish

Summary

Technical Changes

Part Names and Functions

INDOOR UNIT COMPONENTS

Identifies components of the indoor unit.

ACCESSORIES

Lists included accessories with their quantities.

REMOTE CONTROLLER DETAILS

Details the functions and buttons of the remote controller.

SPECIFICATION

Indoor Model Specifications

Provides technical specifications for indoor models.

OUTLINES AND DIMENSIONS

INDOOR UNIT DIMENSIONS

Shows physical dimensions and connection points of the indoor unit.

WIRELESS REMOTE CONTROLLER DIMENSIONS

Displays the dimensions of the wireless remote controller.

WIRING DIAGRAM

MSH-A18ND WIRING DIAGRAM

Illustrates the electrical connections for the MSH-A18ND indoor unit.

MSH-A24ND WIRING DIAGRAM

Illustrates the electrical connections for the MSH-A24ND indoor unit.

REFRIGERANT SYSTEM DIAGRAM

MSH-A18ND REFRIGERANT FLOW

Depicts the refrigerant flow for the MSH-A18ND indoor unit.

MSH-A24ND REFRIGERANT FLOW

Depicts the refrigerant flow for the MSH-A24ND indoor unit.

SERVICE FUNCTIONS

TIMER SHORT MODE OPERATION

Explains how to shorten timer operation for servicing purposes.

PC BOARD MODIFICATION FOR MULTI-UNIT CONTROL

Details modifying PC boards for multi-unit control.

AUTO RESTART FUNCTION

Describes the automatic restart feature after power interruption.

TROUBLESHOOTING

Cautions and Basic Checks

Provides essential safety and preliminary checks before troubleshooting.

Troubleshooting Procedure

Outlines the general steps to diagnose and identify issues.

Remote Controller Battery Replacement

Guides on replacing remote controller batteries for proper function.

Diagnostic Flowcharts

Provides flowcharts for diagnosing unit malfunctions.

Indicator Troubleshooting Table

Correlates indicator patterns with specific faults and solutions.

Main Part Trouble Criteria

Lists criteria for checking the normal operation of key components.

Specific Troubleshooting Flows

Detailed flowcharts for troubleshooting specific operational issues.

Mis-wiring Check Guide

Guides on identifying and correcting incorrect wiring connections.

Test Point and Voltage Diagrams

Provides diagrams of PC boards with test points and voltage values.

DISASSEMBLY INSTRUCTIONS

Removing the Front Panel

Details the procedure for removing the front panel of the indoor unit.

Removing Electronic Boards

Explains how to remove key internal electronic boards.

Removing the Electrical Box

Outlines the process for removing the electrical box.

Removing the Vane Motor

Details the steps to remove the vane motor.

Removing Fan and Motor Assembly

Guides on removing the fan and motor assembly.

PARTS LIST (non-RoHS compliant)

Indoor Unit Structural Parts

Lists structural components of the indoor unit.

Indoor Unit Heat Exchanger

Lists parts related to the indoor heat exchanger.

Indoor Unit Functional and Electrical Parts

Lists functional and electrical components of the indoor unit.

Accessory and Remote Controller Parts

Lists accessories and remote control components.

Air Cleaning Filter

Details the air cleaning filter, its function, and maintenance.

RoHS PARTS LIST (RoHS compliant)

Indoor Unit Structural Parts (RoHS)

Lists structural components of the indoor unit for RoHS compliant models.

Indoor Unit Heat Exchanger (RoHS)

Lists heat exchanger parts for RoHS compliant models.

Indoor Unit Functional and Electrical Parts (RoHS)

Lists functional/electrical parts for RoHS compliant models.

Accessory and Remote Controller Parts (RoHS)

Lists accessories/remote parts for RoHS compliant models.

Air Cleaning Filter (RoHS)

Details the air cleaning filter for RoHS compliant models.

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