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Mitsubishi MSH-A18WV User Manual

Mitsubishi MSH-A18WV
32 pages
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SERVICE MANUAL
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. MICROPROCESSOR CONTROL ······················9
9. SERVICE FUNCTIONS ····································18
10. TROUBLESHOOTING······································20
11. DISASSEMBLY INSTRUCTIONS·····················28
12. PARTS LIST······················································30
13. OPTIONAL PARTS ······················BACK COVER
Wireless type
Models
MSH-A18WV -
(
WH
)
MSH-A24WV -
(
WH
)
MSH-A30WV -
(
WH
)
E1
E1
E1
No. OB321
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MSH-A18WV -
MSH-A24WV -
MSH-A30WV -
E1
E1
E1
NOTE:
This service manual describes technical data of the indoor unit.
•Refer to the service manual OB322 when MSH-A18WV- , MSH-A24WV- or MSH-A30WV- is
connected with MUH-A18WV- , MUH-A24WV- or MUH-A30WV- .
•Refer to the service manual OB319 when MSH-A18WV- is connected with MXZ-A18WV- ,
MXZ-A26WV- or MXZ-A32WV- as multi system units.
•Refer to the service manual OB319 when MSH-A24WV- is connected with MXZ-A26WV- or
MXZ-A32WV- as multi system units.
E1
E1E1
E1E1
E1E1
E1E1E1
E1E1E1
Indication of model name
OB321-1.qxp 03.11.13 4:03 PM Page 1
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Mitsubishi MSH-A18WV Specifications

General IconGeneral
BrandMitsubishi
ModelMSH-A18WV
CategoryAir Conditioner
LanguageEnglish

Summary

1 TECHNICAL CHANGES

Model Comparison and Changes

Details changes between older MSH-RV series and newer MSH-AWV series models.

2 PART NAMES AND FUNCTIONS

Indoor Unit Components

Identifies and describes the various parts of the indoor unit.

Included Accessories

Lists and describes the accessories provided with the indoor unit.

3 SPECIFICATION

MSH-A18/A24WV-E1 Specifications

Provides detailed technical specifications for the MSH-A18WV-E1 and MSH-A24WV-E1 models.

MSH-A30WV-E1 Specifications

Provides detailed technical specifications for the MSH-A30WV-E1 model.

4 NOISE CRITERIA CURVES

Noise Levels by Model

Presents noise criteria curves for MSH-A18WV, MSH-A24WV, and MSH-A30WV models.

5 OUTLINES AND DIMENSIONS

Indoor Unit Dimensions

Shows the overall dimensions and installation outlines for the indoor unit.

6 WIRING DIAGRAM

MSH-A18/A24WV Wiring Diagram

Illustrates the internal wiring connections for the MSH-A18WV-E1 and MSH-A24WV-E1 indoor units.

MSH-A30WV Wiring Diagram

Illustrates the internal wiring connections for the MSH-A30WV-E1 indoor unit.

7 REFRIGERANT SYSTEM DIAGRAM

Refrigerant Flow Diagrams by Model

Depicts the refrigerant flow paths for cooling and heating for each model.

8 MICROPROCESSOR CONTROL

Remote Controller and Display Functions

Explains the wireless remote controller layout, buttons, and the indoor unit's operation indicator lamp.

Operation Modes Overview (I FEEL, Standard)

Covers 'I FEEL CONTROL' and standard COOL, DRY, HEAT modes, including their settings and controls.

Key Control Functions (Fan, Vane, Timer)

Details fan motor control, auto vane operation, and timer functions for unit operation.

Emergency and Test Operation

Details how to use the emergency operation switch for testing, servicing, or when the remote is unavailable.

9 SERVICE FUNCTIONS

Timer Short Mode and PC Board Modification

Explains how to modify timer settings and PC boards for individual unit operation.

Auto Restart Function

Describes the automatic restart feature after power restoration and how to release it.

10 TROUBLESHOOTING

General Troubleshooting Precautions

Covers safety cautions, initial checks, and battery replacement for troubleshooting.

Troubleshooting Flowchart and Component Checks

Details troubleshooting indicators, flash codes, flowchart, and checks for specific components.

Test Point Diagrams and Voltages

Offers diagrams and voltage references for diagnosing electronic control issues.

11 DISASSEMBLY INSTRUCTIONS

Front Panel and Board Removal

Step-by-step guide for removing the front panel and internal circuit boards.

Electrical Box, Vane Motor, and Fan Motor Removal

Instructions for disassembling electrical components and motors from the indoor unit.

12 PARTS LIST

Indoor Unit Structural and Heat Exchanger Parts

Lists structural components and heat exchanger parts with their part numbers.

Indoor Unit Functional Parts, Electrical Parts, and Accessories

Lists functional parts, electrical components, and accessories with their respective part numbers.

13 OPTIONAL PARTS

Air Cleaning Filter

Information on the air cleaning filter, its function, lifespan, and replacement.

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