Mitsubishi Electric MU-18RV-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

Model Specifications and Technical Data

Indoor Unit Specifications (MS-18;24 RV)

Outdoor Unit Specifications (MU-18;24 RV)

MS-30 RV and MU-30 RV Specifications

Unit Dimensions and Installation Space

Electrical Wiring Diagrams

MS-18 RV;MU-18 RV Wiring Diagram

Illustrates the electrical connections for MS-18RV indoor and MU-18RV outdoor units.

MS-24 RV;MU-24 RV Wiring Diagram

Details the electrical wiring for MS-24RV indoor and MU-24RV outdoor units.

MS-30 RV Indoor Unit Wiring

Shows the wiring diagram for the MS-30RV indoor unit.

MU-30 RV Outdoor Unit Wiring

Provides the wiring diagram for the MU-30RV outdoor unit.

Refrigerant System Diagrams

MS-18;24 RV & MU-18;24 RV Refrigerant Flow

MS-30 RV & MU-30 RV Refrigerant Flow

Refrigerant Piping and Charge Specifications

Maximum Piping Length, Size, and Height

Additional Refrigerant Charge Guidelines

Cooling Performance Curves

Detailed Cooling Performance Data

MS-18 RV;MU-18 RV Performance Data (220 V)

Provides cooling performance data for MS-18RV/MU-18RV units at 220V.

MS-18 RV;MU-18 RV Performance Data (240 V)

Lists cooling performance data for MS-18RV/MU-18RV units at 240V.

MS-24 RV;MU-24 RV Performance Data (220 V)

Presents cooling performance data for MS-24RV/MU-24RV units at 220V.

MS-24 RV;MU-24 RV Performance Data (240 V)

Details cooling performance data for MS-24RV/MU-24RV units at 240V.

MS-30 RV;MU-30 RV Performance Data (220 V)

Provides cooling performance data for MS-30RV/MU-30RV units at 220V.

MS-30 RV;MU-30 RV Performance Data (240 V)

Lists cooling performance data for MS-30RV/MU-30RV units at 240V.

Microprocessor Control and Remote Operations

Remote Controller Functions and Indicators

I FEEL CONTROL Mode Operation Details

Details the operation of I FEEL CONTROL mode, including temperature settings and fuzzy logic.

Operation Modes: COOL, DRY, FAN

AUTO VANE, ECONO COOL, and LONG Modes

Emergency Operation and LEV Control

Emergency Test Operation Procedure

LEV Control Specifications and Operation

LEV Opening Correction and Time Charts

Troubleshooting Guide and Component Checks

Troubleshooting Cautions and Initial Steps

Provides general precautions and initial steps for troubleshooting unit issues.

Troubleshooting Flowchart and Indicator Codes

Offers a flowchart for diagnosing malfunctions based on indicator lamps and symptoms.

Main Component Resistance Checks

Provides normal resistance values for key components like thermistors, motors, and compressors.

Specific Component Fault Checks

Guides on checking LEV, outdoor thermistors, and fan motors for abnormalities.

Electronic Control Board Diagnostics

MS-18 RV;MS-24 RV PC Board Test Points

Shows test points and voltages on the indoor electronic control PC board for MS-18/24RV.

MS-30 RV Indoor PC Board Test Points

Details test points and voltages on the indoor electronic control PC board for MS-30RV.

MS-30 RV Outdoor Deicer PC Board Checks

Illustrates test points and thermistor resistance curves for the MS-30RV outdoor deicer PC board.

Indoor Unit Disassembly Procedures

Removing Indoor Unit Front Panel and Boards

Removing Indoor Unit Electrical Box and Fan Components

MS-30 RV Indoor Unit Disassembly

MS-30 RV Indoor Unit Component Removal

Outdoor Unit Disassembly Procedures

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

MU-30 RV Outdoor Unit Disassembly Steps

MU-30 RV Outdoor Unit Component Removal

Mitsubishi Electric MU-18RV-E1 Specifications