Midea DLCMRAH36DAK 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 DLCMRAH36DAK Specifications

General

Model Number	DLCMRAH36DAK
Category	Heat Pump
Voltage (V)	208-230
Phase	1
Coefficient of Performance (COP)	3.5
Power Supply (V/Ph/Hz)	208-230/1/60
Refrigerant Type	R410A
Cooling Capacity (BTU/h)	36000
Heating Capacity (BTU/h)	36000

Summary

Indoor Unit Combination

Dimension Of Outdoor Unit

Refrigerant Cycle Diagram

3.1 Refrigeration Circuit Drawing for 1 Drive 2 Type

Circuit diagram for 1 drive 2 type outdoor unit.

3.2 Refrigeration Circuit Drawing for 1 Drive 3 Type

Circuit diagram for 1 drive 3 type outdoor unit.

3.3 Refrigeration Circuit Drawing for 1 Drive 4 Type

Circuit diagram for 1 drive 4 type outdoor unit.

3.4 Refrigeration Circuit Drawing for 1 Drive 5 Type

Circuit diagram for 1 drive 5 type outdoor unit.

Installation Details

4.1 Wrench Torque Sheet for Installation

Torque specifications for pipe connections and tightening.

4.2 Connecting the Cables

Guidelines for selecting power and connection line cables.

4.3 Pipe Length and Elevation Limits

Maximum piping length and height difference specifications.

4.4 First-Time Installation Procedure

Steps for initial system setup and leak testing.

4.5 Adding Refrigerant After Long-Term Operation

Procedure for adding refrigerant to systems in use.

4.6 Servicing Indoor Unit Refrigeration Circuit

Steps for servicing the indoor unit's refrigeration circuit.

4.7 Evacuation After Outdoor Unit Servicing

Procedure for evacuating the refrigeration circuit post-service.

Electronic Function and Protection

5.1 Abbreviation List

List of common abbreviations for sensors and components.

5.2 Electric Control Working Environment

Specifies input voltage and frequency requirements for operation.

5.3 Main Protection Mechanisms

Details on compressor, fan, and module protection features.

5.4 Control and Functions Overview

Explains capacity, defrosting, fan, EXV, and 4-way valve controls.

Wiring Diagrams

6.1 Wiring Diagram for 1 Drive 2 Outdoor Unit

Electrical schematic for M2OF-18HFN1-M outdoor unit.

6.2 Wiring Diagram for 1 Drive 3 Outdoor Unit

Electrical schematic for M3OF-27HFN1-M outdoor unit.

6.3 Wiring Diagram for 1 Drive 4 Outdoor Unit

Electrical schematic for M4OF-36HFN1-M outdoor unit.

6.4 Wiring Diagram for M5OF-48HFN1-M

Electrical schematic for M5OF-48HFN1-M outdoor unit.

Troubleshooting Procedures

7.1 Safety Precautions for Troubleshooting

Essential safety guidelines before starting troubleshooting.

7.2 Indoor Unit Error Display Codes

List of error codes and their meanings for indoor units.

7.3 Outdoor Unit Display Indicators

Explanation of codes and status displayed on the outdoor unit.

7.4 Diagnosis and Solution Guides

Detailed steps to diagnose and resolve common malfunctions.

7.5 Trouble Criterion of Main Parts

Guidelines for checking the functionality of key components.

Disassembly Instructions

Fan Assembly Disassembly

Steps for removing the fan assembly for different models.

Panel Plate Disassembly

Steps for removing the panel plate for different models.

Electrical Parts Disassembly

Steps for removing electrical components for different models.

Compressor Removal

Steps for removing the compressor for different models.

Reactor Removal

Steps for removing the reactor for different models.

4-Way Valve Removal

Steps for removing the 4-way valve for different models.

Expansion Valve Removal

Steps for removing the expansion valve for different models.