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Mitsubishi Electric MCFH-A12WV User Manual

Mitsubishi Electric MCFH-A12WV
24 pages
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SERVICE MANUAL
Wireless type
Models
MCFH-A12WV-
(WH)
MCFH-A18WV-
(WH)
MCFH-A24WV-
(WH)
E1
E1
E1
No. OB336
(When installed on the ceiling)
(When installed on the floor)
FLOOR AND CEILING TYPE AIR CONDITIONERS
NOTE:
• This manual describes technical data of indoor units
As for outdoor units MUCFH-A18/A24WV- , refer to the service manual OB337.
As for outdoor unit MUH-A12YV- , refer to the service manual OB331.
As for outdoor units MXZ-A18/A26/A32WV- , refer to the service manual OB319.
E1
E1
E1
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. NOISE CRITERIA CURVES·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING······································11
10. DISASSEMBLY INSTRUCTIONS·····················19
11. PARTS LIST······················································21
12. OPTIONAL PARTS···········································23
Indication of
model name
MCFH-A12WV-
MCFH-A18WV-
MCFH-A24WV-
E1
E1
E1
OB336--1.qxp 04.1.6 11:12 AM Page 1

Questions and Answers:

Mitsubishi Electric MCFH-A12WV Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMCFH-A12WV
CategoryAir Conditioner
LanguageEnglish

Summary

Technical Changes

Part Names and Functions

Specification

Noise Criteria Curves

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Service Functions

Timer Short Mode

Explains how to shorten time delay for service purposes.

PC Board Modification for Individual Operation

Details how to modify PC boards for multi-unit remote control.

Auto Restart Function

Describes the auto restart function and how to release it.

Troubleshooting

Troubleshooting Cautions

Provides essential safety and preliminary checks before troubleshooting.

Troubleshooting Instruction Flowchart

Outlines a step-by-step guide and flowchart for diagnosing issues.

Trouble Criteria for Main Parts

Lists criteria for identifying faulty main components like thermistors and motors.

Indoor Fan Motor Troubleshooting

Guides on diagnosing and fixing issues when the indoor fan motor fails.

Remote Controller Operation Troubleshooting

Provides steps to troubleshoot when the unit responds to emergency operation but not the remote.

Unit Does Not Operate with Remote Controller

Covers checks for the indoor electronic control P.C. board when the unit is unresponsive.

Troubleshooting Flashing Indicator (4-time)

Details checks for the indoor unit when the operation indicator flashes 4 times.

Troubleshooting Flashing Indicator (0.5-sec)

Guides on diagnosing mis-wiring and serial signal errors causing flashing lights.

Disassembly Instructions

Removing the Electronic Control P.C. Board

Step-by-step guide for removing the indoor unit's electronic control P.C. board.

Removing the Indoor Fan Motor

Detailed procedure for disassembling and removing the indoor fan motor.

Removing the Indoor Heat Exchanger

Instructions for safely removing the indoor heat exchanger assembly.

Parts List

Indoor Unit Structural Parts List

Lists all structural components of the indoor unit with part numbers.

Indoor Unit Electrical Parts List

Enumerates electrical components of the indoor unit with their part numbers.

Accessory and Remote Controller Parts

Lists accessories and remote control components with part numbers.

Optional Parts

Air Cleaning Filter

Information and part number for the optional air cleaning filter.

Deodorizing Filter

Details on the optional deodorizing filter, including maintenance and part number.

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