Midea M4OF-36HFN1-M User Manual

1
Multi outdoor units
SERVICE MANUAL
Multi zone
CONDENSING UNITS
Revision E: ODMFI-E-1712
Model Numbers:
M2OF-18HFN1-M M3OF-27HFN1-M M4OF-36HFN1-M
M5OF-48HFN1-M
WARNING
 Installation MUST conform with local building codes or, in the absence of local
codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition
and Canadian Electrical Code Part1 CSA C.22.1.
 The information contained in the manual is intended for use by a qualified service
technician familiar with safety procedures and equipped with the proper tools and
test instruments
 Installation or repairs made by unqualified persons can result in hazards to you
and others.
 Failure to carefully read and follow all instructions in this manual can result in
equipment malfunction, property damage, personal injury and/or death.
Table of Contents
1. Indoor Unit Combination
2. Dimension Of Outdoor Unit
3. Refrigerant Cycle Diagram
4. Installation Details
5. Electronic Function
6. Wiring Diagrams
7. Trouble Shooting
8. Disassembly Instructions

Midea M4OF-36HFN1-M Specifications

General

Brand	Midea
Model	M4OF-36HFN1-M
Category	Heat Pump
Language	English

Summary

General Safety Warnings

Indoor Unit Combination

Dimension Of Outdoor Unit

Refrigerant Cycle Diagram

Installation Details

Wrench Torque Sheet

Specifies torque values for pipe connections during installation.

Connecting the Cables

Guidelines for power cord and connection line selection.

Pipe Length and Elevation

Defines maximum piping length and height difference limits.

First-Time Installation

Explains issues from air/moisture and leak testing procedures.

Electronic Function

Abbreviation

Lists abbreviations for sensors and system components.

Electric Control Working Environment

Specifies operating voltage, frequency, and current limits.

Key Protections and Controls

Covers main protections, functions, and operational modes.

Wiring Diagrams

Wiring Diagram of 1 Drive 2 Outdoor

Electrical wiring schematic for 1 drive 2 outdoor unit.

Wiring Diagram of 1 Drive 3 Outdoor

Electrical wiring schematic for 1 drive 3 outdoor unit.

Wiring Diagram of 1 Drive 4 Outdoor

Electrical wiring schematic for 1 drive 4 outdoor unit.

Wiring Diagram of M5OF-48HFN1-M

Electrical wiring schematic for M5OF-48HFN1-M model.

Troubleshooting

Safety

Important safety precautions related to capacitors and high voltage.

Unit Error Displays

Lists error codes and diagnostic information for indoor/outdoor units.

Troubleshooting Procedures

Provides systematic diagnosis and solution steps for common issues.

Component Troubleshooting

Criteria and methods for checking main system components.

Disassembly Instructions

M2OF-18HFN1-M Disassembly

Procedures for disassembling the M2OF-18HFN1-M unit.

M3OF-27HFN1-M Disassembly

Disassembly procedures for the M3OF-27HFN1-M model.

M4OF-36HFN1-M Disassembly

Disassembly instructions for the M4OF-36HFN1-M model.

M5OF-48HFN1-M Disassembly

Disassembly instructions for the M5OF-48HFN1-M model.