Mitsubishi Electric MSH-30RV 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 MSH-30RV Specifications

General

Brand	Mitsubishi Electric
Model	MSH-30RV
Category	Air Conditioner
Language	English

Summary

Technical Changes and Revisions

Component Identification and Functions

Indoor Unit Components Overview

Identifies key parts and their functions within the indoor unit.

Outdoor Unit Components Overview

Identifies key parts and their functions within the outdoor unit.

Wireless Remote Controller Operation

MSH-18/24RV Remote Control Functions

Explains buttons and display for MSH-18/24RV remote.

MSH-30RV Remote Control Functions

Explains buttons and display for MSH-30RV remote.

Technical Specifications

Indoor Unit Specifications

Detailed technical data for indoor unit models.

Outdoor Unit Specifications

Detailed technical data for outdoor unit models.

Noise Criteria Curves

Unit Noise Performance Data

Sound pressure levels for various operating conditions.

Unit Outlines and Dimensions

Indoor Unit Dimensions

Physical measurements and installation space for indoor units.

Outdoor Unit Dimensions

Physical measurements and installation space for outdoor units.

Electrical Wiring Diagrams

Indoor Unit Wiring Diagrams

Electrical schematics for indoor unit models.

Outdoor Unit Wiring Diagrams

Electrical schematics for outdoor unit models.

Refrigerant System Diagrams

Refrigerant Flow Diagrams

Illustrates refrigerant paths for cooling and heating.

Refrigerant Piping Specifications

Details maximum piping length and height differences.

Additional Refrigerant Charge

Refrigerant Charge Calculations

Formulas for calculating additional refrigerant charge.

Performance Curves and Data

Cooling Performance Data

Capacity and input at various indoor/outdoor conditions.

Heating Performance Data

Capacity and input at various indoor/outdoor conditions.

Outdoor Unit Operating Conditions

Low pressure and current characteristics for cooling.

Microprocessor Control Functions

"I Feel Control" Operation Modes

Details COOL, DRY, and HEAT modes within "I Feel Control".

Auto Vane Operation

Automatic adjustment of horizontal and vertical vanes.

Timer Operation Settings

How to set ON/OFF timers for unit operation.

Emergency and Test Operation

Procedures for test runs and emergency use.

LEV Control (MSH-30RV)

Control of the electronic expansion valve for MSH-30RV.

Service Functions and Modifications

Compulsory Defrosting Mode

Service procedure to initiate defrost mode.

Defrost Setting Adjustments

How to change defrost interval and temperature settings.

Timer Short Mode Function

Shortens timer setting time for service.

P.C. Board Modification for Operation

Modifying P.C. boards for individual unit operation.

Auto Restart Function

Automatic unit restart after power failure.

Troubleshooting Guide

Troubleshooting Safety Precautions

Important safety measures before performing service.

Troubleshooting Flowcharts

Step-by-step diagnostic flowcharts for issues.

Component Trouble Criteria

Resistance and voltage checks for key parts.

Test Point Diagrams and Voltages

Indoor P.C. Board Test Points

Voltage measurements and test points on the indoor control board.

Outdoor Deicer P.C. Board Information

MUH-18RV Deicer Board Details

Diagram and info for MUH-18RV deicer board.

MUH-24/30RV Deicer Board Details

Diagram and info for MUH-24/30RV deicer board.

Disassembly Instructions

Indoor Unit Disassembly Procedures

Step-by-step guide to disassembling indoor units.

Outdoor Unit Disassembly Procedures

Step-by-step guide to disassembling outdoor units.

Parts Lists

Indoor Unit Parts List

Catalog of parts for the indoor unit.

Outdoor Unit Parts List

Catalog of parts for the outdoor unit.

Accessory and Remote Controller Parts

Lists of accessories and remote control components.

Optional Parts

Air Cleaning Filter Information

Details on the air cleaning filter and its maintenance.

Deodorizing Filter Information

Details on the deodorizing filter and its maintenance.