Mitsubishi Electric MUH-24RV User Manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························8
5. OUTLINES AND DIMENSIONS ······················ 10
6. WIRING DIAGRAM ··········································13
7. REFRIGERANT SYSTEM DIAGRAM··············17
8. PERFORMANCE CURVES······························20
9. MICROPROCESSOR CONTROL ····················36
10. SERVICE FUNCTIONS·····································50
11. TROUBLESHOOTING······································52
12. DISASSEMBLY INSTRUCTIONS·····················71
13. PARTS LIST······················································79
14. OPTIONAL PARTS···········································88
Wireless type
Models
MSH-18RV -
(
WH
)
· MUH-18RV -
MSH-24RV -
(
WH
)
· MUH-24RV -
MSH-30RV -
(
WH
)
· MUH-30RV -
E1E1
E1E1
E1E1
No. OB272
MSH-18RV -
MSH-24RV -
E1
E1
•Refer to the Service Manual OB185 REVISED
EDITION C when MSH-18RV- is connected
with MXZ-32NV- or MXZ-32NV- as multi
system units.
•Refer to the Service Manual OB227 REVISED
EDITION-B when MSH-18RV- is connected
with MXZ-32RV- as multi system units.
•Refer to the Service Manual OB254 when MSH-
18RV- is connected with MXZ-32SV- as
multi system units.
E1E1
E1
E1
E2E1
E1
OB272-1.qxp 2/7/01 2:53 PM Page 1

Mitsubishi Electric MUH-24RV Specifications

General

Brand	Mitsubishi Electric
Model	MUH-24RV
Category	Air Conditioner
Language	English

Summary

Technical Changes

Part Names and Functions

Indoor Unit Components

Identifies and describes the components of the indoor unit.

Specification

Noise Criteria Curves

Outlines and Dimensions

Indoor Unit Dimensions

Provides detailed dimensions and installation space requirements for indoor units.

Outdoor Unit Dimensions

Provides detailed dimensions and installation space requirements for outdoor units.

Wiring Diagram

Indoor Unit Wiring Diagram

Illustrates the electrical connections for the indoor unit's components.

Outdoor Unit Wiring Diagram

Illustrates the electrical connections for the outdoor unit's components.

Refrigerant System Diagram

MSH/MUH-18RV Refrigerant Circuit

Shows the refrigerant circuit for MSH/MUH-18RV models, including flow direction.

MSH/MUH-24RV Refrigerant Circuit

Shows the refrigerant circuit for MSH/MUH-24RV models, including flow direction.

Performance Curves

Cooling Performance Data

Displays cooling performance curves related to capacity and input based on conditions.

Microprocessor Control

Indoor Unit Indicator States

Details the meaning of the indoor unit's operation indicator lamp states.

"I FEEL CONTROL" Modes

Describes "I FEEL CONTROL" mode operation based on room temperature and user input.

Service Functions

Compulsory Defrosting Mode

Enables forced defrosting for service purposes, overriding normal restrictions.

Timer and PC Board Modifications

Explains how to modify timer settings and P.C. boards for specific operations.

Troubleshooting

Troubleshooting Precautions

Provides essential safety precautions and preliminary checks before troubleshooting.

Disassembly Instructions

Indoor Unit Disassembly

Step-by-step instructions for disassembling the indoor unit, including electrical components.

Parts List

Indoor Unit Parts List

Lists all structural, electrical, and functional parts for indoor units.

Indoor Unit Heat Exchanger

Lists the heat exchanger components for indoor units.

Optional Parts

Air Cleaning Filter

Details the function and maintenance of the air cleaning filter.

Deodorizing Filter

Details the function and maintenance of the deodorizing filter.