Mitsubishi MCFH-24NV - User Manual

SERVICE MANUAL
FLOOR AND CEILING TYPE AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························7
5. OUTLINES AND DIMENSIONS ·························8
6. WIRING DIAGRAM ············································9
7. REFRIGERANT SYSTEM DIAGRAM··············14
8. PERFORMANCE CURVES······························16
9. MICROPROCESSOR CONTROL ····················32
10. SERVICE FUNCTIONS·····································41
11. TROUBLESHOOTING······································42
12. DISASSEMBLY INSTRUCTIONS·····················55
13. PARTS LIST······················································63
14. OPTIONAL PARTS···········································70
Wireless type
Models
MCFH-13NV-
(WH)
·MUCFH-13NV-
MCFH-18NV-
(WH)
·MUCFH-18NV-
MCFH-24NV-
(WH)
·MUCFH-24NV-
E3E3
E3E3
E4E4
No. OB267
(When installed on the ceiling)
(When installed on the floor)
This Service manual OB212 deals with MCFH-13/18/24/NV-E1,
MUCFH-13/18/24/NV-E1, MCFH-13/18/24/NV-E2 and MUCFH-
13/18/24/NV-E2 in OB196 REVISED EDITION A issued in
September in 1997.
Therefore, please refer to OB212, not to OB196 REVISED EDI-
TION A, for the above models.
W As for parts lists, all sub number’s series are included.
OB267--1.qxp 01.4.13 0:48 PM Page 1

Summary

Technical Changes

Part Names and Functions

Indoor Unit Components

Identifies components of the indoor unit and lists accessories.

Outdoor Unit Components

Illustrates and labels parts of the outdoor units for different models.

Specifications

Wiring Diagrams

Indoor Unit Wiring Diagram

Illustrates the electrical connections for the indoor unit.

Outdoor Unit Wiring Diagram

Shows the electrical wiring for the outdoor unit.

Microprocessor Control

Wireless Remote Controller Overview

Operation Modes (COOL, HEAT, DRY, I FEEL)

Details the operation modes including I FEEL, COOL, HEAT, and DRY functions.

Service Functions

Compulsory Defrosting Mode

Procedure to activate defrost mode for service purposes.

Change in Defrost Setting

Troubleshooting

Troubleshooting Cautions

Important safety and handling precautions before starting troubleshooting.

Troubleshooting Procedure

Steps to diagnose and resolve operational issues, including indicator lamp checks.

Troubleshooting Check Table

Correlates symptoms with detect methods and check points.

Trouble Criterion of Main Parts

Resistance values for critical components to diagnose faults.

Disassembly Instructions

Indoor Unit Disassembly

Step-by-step guide for disassembling the indoor unit, including photos.

Outdoor Unit Disassembly (MCFH-13 NV)

Procedures for removing cabinets and boards from the MUCFH-13NV outdoor unit.

Outdoor Unit Disassembly (MCFH-18 NV)

Steps to disassemble the MUCFH-18NV outdoor unit, covering cabinets and boards.

Outdoor Unit Disassembly (MCFH-24 NV)

Instructions for dismantling the MUCFH-24NV outdoor unit, including electrical and fan parts.

Parts List

Indoor Unit Structural Parts

Indoor Unit Electrical Parts

Outdoor Unit Structural Parts (MCFH-13 NV)

Outdoor Unit Structural Parts (MUCFH-24 NV)

Outdoor Unit Electrical Parts (MUCFH-24 NV)

Mitsubishi MCFH-24NV Specifications