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Mitsubishi Electric MS-A12ND User Manual

Mitsubishi Electric MS-A12ND
24 pages
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SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································4
4. OUTLINES AND DIMENSIONS ·························5
5. WIRING DIAGRAM ············································6
6. REFRIGERANT SYSTEM DIAGRAM················6
7. SERVICE FUNCTIONS ······································7
8. TROUBLESHOOTING········································9
9. DISASSEMBLY INSTRUCTIONS ····················18
10. PARTS LIST······················································20
Wireless type
Models
SPLIT-TYPE, AIR CONDITIONERS
MS-A08VD-
MS-A10VD-
MS-A13VD-
P1
P1
P1
TM
No. OB396
Indication of model name
MS-A08VD -
MS-A10VD -
MS-A13VD -
P1
P1
P1
NOTE:
• This service manual describes technical data of indoor units.
As for outdoor units MU-A08VD - ,MU-A10VD - and MU-A13VD - , refer to the service manual OB397.
P1P1P1
OB396--1.qxp 05.3.18 8:59 AM Page 1

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Mitsubishi Electric MS-A12ND Specifications

General IconGeneral
TypeSplit System
Cooling Capacity3.5 kW
Heating Capacity4.0 kW
Power Supply220-240 V, 50 Hz
RefrigerantR410A
Indoor Unit Dimensions (WxHxD)798 x 295 x 232 mm
Indoor Unit Weight9 kg
Noise Level (Outdoor Unit)50 dB(A)
Noise Level (Indoor Unit)24 dB

Summary

1. TECHNICAL CHANGES

2. PART NAMES AND FUNCTIONS

INDOOR UNIT COMPONENTS

Details the components of the indoor unit with labels and diagrams.

ACCESSORIES LIST

Lists all included accessories with quantities and part numbers.

3. SPECIFICATION

REMOTE CONTROLLER SPECIFICATIONS

Details the specifications and functions of the remote controller.

INDOOR UNIT SPECIFICATIONS

Provides key electrical and performance data for the indoor units.

4. OUTLINES AND DIMENSIONS

MS-A08VD/MS-A10VD DIMENSIONS

Shows the physical dimensions and installation points for specific models.

MS-A13VD DIMENSIONS

Displays the physical dimensions and installation details for the MS-A13VD model.

5. WIRING DIAGRAM

INDOOR UNIT WIRING DIAGRAM

Illustrates the electrical connections within the indoor unit.

WIRING DIAGRAM SYMBOLS

Explains the meaning of symbols used in the wiring diagrams.

6. REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT PIPE LAYOUT

Depicts the refrigerant circuit and related components.

7. SERVICE FUNCTIONS

TIMER SHORT MODE FUNCTION

Describes a function to shorten timer settings for service purposes.

P.C. BOARD MODIFICATION FOR MULTI-UNIT CONTROL

Explains how to modify the P.C. board for multi-unit control.

AUTO RESTART FUNCTION

Details the automatic restart feature after a power failure.

8. TROUBLESHOOTING

TROUBLESHOOTING SAFETY PRECAUTIONS

Outlines essential safety measures and checks before troubleshooting.

GENERAL TROUBLESHOOTING PROCEDURE

Provides a step-by-step guide for diagnosing common issues.

REMOTE CONTROLLER BATTERY REPLACEMENT

Instructions on how to replace batteries in the remote controller.

HORIZONTAL VANE INSTALLATION PROCEDURE

Explains the correct procedure for installing horizontal vanes.

TROUBLESHOOTING DIAGNOSTIC FLOWCHART

A visual guide to diagnose unit malfunctions based on indicator lamps.

TROUBLESHOOTING CHECK TABLE

A table correlating abnormal indicators with symptoms and detection methods.

MAIN PART TROUBLESHOOTING CRITERIA

Lists resistance and voltage criteria for diagnosing key components.

INDOOR FAN MOTOR TROUBLESHOOTING

A diagnostic flow for issues related to the indoor fan motor.

REMOTE CONTROL TROUBLESHOOTING

A diagnostic flow for problems with remote control operation.

INDOOR ELECTRONIC CONTROL P.C. BOARD CHECK

Steps to diagnose problems with the main control board.

HORIZONTAL VANE CONTINUITY CHECK

Procedure to check the continuity of the horizontal vane safety device.

TEST POINT DIAGRAM AND VOLTAGES

Provides a detailed diagram of test points and expected voltages on the P.C. board.

9. DISASSEMBLY INSTRUCTIONS

TERMINAL LOCKING MECHANISM DETACHING

Explains how to detach terminals with locking mechanisms.

REMOVING THE FRONT PANEL

Instructions for removing the front panel of the indoor unit.

REMOVING ELECTRONIC P.C. BOARDS

Steps to remove the electronic control and receiver P.C. boards.

REMOVING THE ELECTRICAL BOX

Guide for disassembling the electrical box containing components.

REMOVING NOZZLE ASSEMBLY AND VANE MOTOR

Instructions for removing the nozzle assembly and vane motor.

REMOVING FAN MOTOR AND LINE FLOW FAN

Steps for removing the indoor fan motor and line flow fan.

10. PARTS LIST

INDOOR UNIT STRUCTURAL PARTS LIST

Lists and illustrates the main structural components of the indoor unit.

ACCESSORY AND REMOTE CONTROLLER PARTS LIST

Lists parts for accessories and the remote controller.

INDOOR UNIT ELECTRICAL AND FUNCTIONAL PARTS LIST

Details electrical components and functional parts with part numbers.

INDOOR UNIT HEAT EXCHANGER PARTS LIST

Lists parts related to the indoor unit's heat exchanger.

AIR CLEANING FILTER DETAILS

Provides details and part number for the air cleaning filter.

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