Midea Advantage Series

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 Advantage Series Specifications

General

Brand	Midea
Model	Advantage Series
Category	Heat Pump
Language	English

Summary

Condensing Units

Indoor Unit Combination

Dimension Of Outdoor Unit

Refrigerant Cycle Diagram

Refrigeration Circuit Drawing - 1 Drive 2 Type

Details the refrigerant flow for a 1-drive-2 outdoor unit system.

Refrigeration Circuit Drawing - 1 Drive 3 Type

Details the refrigerant flow for a 1-drive-3 outdoor unit system.

Refrigeration Circuit Drawing - 1 Drive 4 Type

Details the refrigerant flow for a 1-drive-4 outdoor unit system.

Refrigeration Circuit Drawing - 1 Drive 5 Type

Details the refrigerant flow for a 1-drive-5 outdoor unit system.

Installation Details

Wrench Torque Sheet for Installation

Specifies torque values for pipe connections during installation.

Cable Connection Specifications

Details power cord and connection line gauge requirements.

Piping Length and Elevation Limits

Outlines maximum pipe lengths and height differences.

First-Time Installation Procedure

Covers initial system setup, leak testing, and evacuation.

Adding Refrigerant

Procedures for adding refrigerant based on pipe length and system operation.

Servicing Refrigeration Circuits

Steps for servicing indoor/outdoor circuits, including evacuation.

Electronic Function

Abbreviation of Technical Terms

Lists and defines abbreviations used for sensors and components.

Electric Control Working Environment

Specifies voltage and frequency requirements for electrical controls.

Main Protection Functions

Details various protection mechanisms like restart delay, temperature, and voltage protection.

Control and Functions

Explains system capacity request calculation, fan control, and EXV operations.

Wiring Diagrams

Wiring Diagram - 1 Drive 2 Outdoor Unit

Illustrates the electrical connections for a 1-drive-2 outdoor unit model.

Wiring Diagram - 1 Drive 3 Outdoor Unit

Illustrates the electrical connections for a 1-drive-3 outdoor unit model.

Wiring Diagram - 1 Drive 4 Outdoor Unit

Illustrates the electrical connections for a 1-drive-4 outdoor unit model.

Wiring Diagram - M5 OF-48 HFN1-M

Illustrates the electrical connections for the M5OF-48HFN1-M model.

Troubleshooting

Safety Precautions for Troubleshooting

Emphasizes safety measures, especially regarding capacitor discharge.

Indoor Unit Error Display Codes

Lists and explains error codes displayed by indoor units and their meanings.

Outdoor Unit Display Codes

Explains codes displayed on the outdoor unit's digital display and their interpretation.

Diagnosis and Solution

Indoor Unit Troubleshooting and Fault Diagnosis

Covers EEPROM errors, communication issues, fan speed, and sensor malfunctions.

Outdoor Unit Troubleshooting and Fault Diagnosis

Guides through diagnosing and resolving common outdoor unit malfunctions and error codes.

Trouble Criterion of Main Parts

Temperature Sensor Checking

Instructions for checking temperature sensors using a tester and resistance tables.

Component Checks (Compressor, IPM, Fan Motor, Valves)

Procedures for checking compressor windings, IPM continuity, fan motors, and valves.

Disassembly Instructions

M2 OF-18 HFN1-M Disassembly

Steps for disassembling the fan, panel, electrical parts, compressor, etc.

M3 OF-27 HFN1-M Disassembly

Steps for disassembling the panel, fan, electrical parts, compressor, etc.

M4 OF-36 HFN1-M Disassembly

Steps for disassembling the panel, fan, electrical parts, compressor, etc.

M5 OF-48 HFN1-M Disassembly

Steps for disassembling the fan, panel, electrical parts, compressor, etc.