Mitsubishi Electric MS-24RV-E1 - User Manual

SERVICE MANUAL
SPLIT-TYPE AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
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 ····················34
10. SERVICE FUNCTIONS·····································45
11. TROUBLESHOOTING······································47
12. DISASSEMBLY INSTRUCTIONS·····················61
13. PARTS LIST······················································69
14. OPTIONAL PARTS ······················BACK COVER
Wireless type
Models
MS-18RV -
(
WH
)
· MU-18RV -
MS-24RV -
(
WH
)
· MU-24RV -
MS-30RV -
(
WH
)
· MU-30RV -
E1E1
E1E1
E1E1
No. OB271
MS-18RV -
MS-24RV -
E1
E1
OB271--1.qxp 2/7/01 9:00 AM Page 1

Summary

Technical Changes

Specification

Performance Curves

Performance Data Cool Operation

Microprocessor Control

9-1. COOL mode of I FEEL CONTROL

Details COOL mode operations within "I FEEL CONTROL".

9-1-2. DRY mode of I FEEL CONTROL

Details DRY mode operation, fan speed, compressor/fan control.

9-2. COOL () OPERATION

Details COOL operation, temperature button usage, and coil frost prevention.

9-3. DRY () OPERATION

Explains DRY operation mode and its parameters.

9-5. FAN MOTOR CONTROL

9-7. TIMER OPERATION

9-8. EMERGENCY-TEST OPERATION

Explains emergency-test operation.

9-9. LEV control <MS-30 RV only>

Details LEV control specifications, general operation, and correction.

Service Functions

10-3. AUTO RESTART FUNCTION

Troubleshooting

11-1. Cautions on troubleshooting

11-2. Instruction of troubleshooting

Flowchart for troubleshooting based on unit behavior.

1. Troubleshooting check table

Table detailing symptoms and checks for abnormalities.

2. Trouble criterion of main parts

Resistance and voltage criteria for various parts like thermistors, compressor, fan motor.

A Check of indoor fan motor

B Check of remote controller and receiver P.C. board

C Check of indoor electronic control P.C. board

Flowchart for checking the indoor electronic control P.C. board.

D Check of outdoor unit

Flowchart for checking outdoor unit operation (compressor/fan).

E Check of outdoor unit <MS-30 RV only>

Flowchart for compressor/outdoor fan motor not stopping for MS-30RV.

F How to check mis-wiring <MS-30 RV only>

Flowchart for checking mis-wiring.

G Check of LEV (Expansion valve)

H Check of outdoor thermistor <MS-30 RV only>

Disassembly Instructions

12-1. MS-18 RV -E1 MS-24 RV -E1 INDOOR UNIT OPERATING PROCEDURE

12-2. MS-30 RV -E1 INDOOR UNIT OPERATING PROCEDURE

12-3. MU-18 RV -E1 MU-24 RV -E1 OUTDOOR UNIT OPERATING PROCEDURE

12-4. MU-30 RV -E1 OUTDOOR UNIT OPERATING PROCEDURE

Mitsubishi Electric MS-24RV-E1 Specifications