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Mitsubishi Electric MU-24RV-E1 - User Manual

Mitsubishi Electric MU-24RV-E1
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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

Table of Contents

Questions and Answers

  • M
    Michelle BennettAug 5, 2025
    What to do if my Mitsubishi Electric Air Conditioner flashes 4 times?
    • L
      Lauren MarshallAug 5, 2025
      If your Mitsubishi Electric Air Conditioner displays a 4-time flash, it indicates a problem with the indoor unit control system. The suggested solution is to replace the indoor electronic control P.C. board.
  • R
    Robert Hall MDAug 9, 2025
    Why is my Mitsubishi Electric MU-24RV-E1 Air Conditioner flashing on and off?
    • A
      Andrea WilliamsAug 9, 2025
      If your Mitsubishi Electric Air Conditioner is flashing on and off at 0.5-second intervals, the cause may be mis-wiring in the indoor or outdoor unit.
  • J
    Jerry JohnsonAug 13, 2025
    What does 7-time flash mean on a Mitsubishi Electric MU-24RV-E1 Air Conditioner?
    • E
      Eddie RubioAug 13, 2025
      If your Mitsubishi Electric Air Conditioner displays a 7-time flash, it indicates a problem with the outdoor control system. The suggested solution is to replace the deicer P.C. board.
  • K
    Katherine KingAug 17, 2025
    What does 6 flashes mean on my Mitsubishi Electric Air Conditioner?
    • P
      Phillip SextonAug 18, 2025
      If your Mitsubishi Electric Air Conditioner displays a 6-time flash, it indicates a problem with the thermistor in the outdoor unit.
  • H
    hchandlerAug 22, 2025
    What does 2 flashes mean on a Mitsubishi Electric MU-24RV-E1 Air Conditioner?
    • B
      brian45Aug 22, 2025
      If your Mitsubishi Electric Air Conditioner displays a 2-time flash, it indicates trouble with the room temperature or indoor coil thermistor.
  • T
    Timothy MaddenAug 26, 2025
    What does 3 flashes mean on my Mitsubishi Electric Air Conditioner?
    • T
      tracy44Aug 27, 2025
      If your Mitsubishi Electric Air Conditioner displays a 3-time flash, it indicates a problem with the indoor fan motor.
  • H
    Harold AdkinsAug 31, 2025
    What does 10 flashes mean on a Mitsubishi Electric Air Conditioner?
    • S
      Savannah GarciaAug 31, 2025
      If your Mitsubishi Electric Air Conditioner displays a 10-time flash, it indicates trouble with low discharge temperature protection.

Summary

Specification

Outlines and Dimensions

Wiring Diagram

Refrigerant System Diagram

Performance Curves

Microprocessor Control

Wireless Remote Controller Operation

I FEEL CONTROL - COOL Mode

Details COOL mode operations including fan speed, coil frost prevention, and fan controls.

I FEEL CONTROL - DRY Mode

Explains DRY mode operation for the system, including fan and compressor control.

Fan Motor Control

ECONO COOL Operation

Timer Operation

Provides instructions for setting and cancelling ON/OFF timers.

Emergency-Test Operation

Describes how to perform emergency operation and test runs.

LEV Control (MS-30 RV only)

Explains the control of the LEV (Expansion valve) based on discharge temperature.

Service Functions

Auto Restart Function

Details the AUTO RESTART FUNCTION for restoring operation after power failure.

Troubleshooting

Cautions on Troubleshooting

Provides safety precautions and initial checks before troubleshooting.

Trouble Criterion of Main Parts

Lists main parts and their normal/abnormal resistance or voltage criteria for testing.

Disassembly Instructions

Indoor Unit Disassembly (MS-18 RV;MS-24 RV)

Indoor Unit Disassembly (MS-30 RV)

Outdoor Unit Disassembly (MU-18 RV;MU-24 RV)

Outdoor Unit Disassembly (MU-30 RV)

Parts List

Indoor Unit Structural Parts

Indoor Unit Functional and Electrical Parts

Outdoor Unit Structural, Electrical, and Functional Parts

Mitsubishi Electric MU-24RV-E1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMU-24RV-E1
CategoryAir Conditioner
LanguageEnglish

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