Midea MOD31-24HFN1-MT0W - User Manual

Revision O: 2103, Content updated.
Model Numbers:
Indoor Unit:
MCA3U-09HRFN1-M(C); MCA3U-12HRFN1-M(C); MCA3U-18HRFN1-M(C);
MFAU-12HRFN1-M(C); MCD-24HRFN1-M(C); MCD-36HRFN1-M(C);
MCD-48HRFN1-M(D); MUEU-18HRFN1-M(C); MUEU-24HRFN1-M(C); MUE-36HRFN1-M(C);
MUE-48HRFN1-M(C); MUE-60HRFN1-MW; MTIU-09HWFN1-M, MTIU-12HWFN1-M;
MTIU-18HWFN1-M; MTIU-24HWFN1-M; MTI-36HWFN1-M; MTI-48HWFN1-M;
MHG-60HWFN1-MW; MCD1-24HRFN1-MT0W(GA)
Outdoor Unit:
MOB30-09HFN1-MX0W; MOB01-09HFN1-MW0W; MOB30-12HFN1-MV0W;
MOB01-12HFN1-MV0W; MOCA30-18HFN1-MT0W; MOCA01-18HFN1-MT0W;
MOD30-24HFN1-MT0W; MOD01-23HFN1-MT0W; MOBA30-09HFN1-MT0W;
MOB30-12HFN1-MT0W; MOCA31-18HFN1-MT0W; MOD31-24HFN1-MT0W;
MOD30U-36HFN1-M; MOE30U-48HFN1-M; MOE30U-60HFN1-M; MOE30U-36HFN1-M-[X]
MOE30U-48HFN1-M-[X]; MOD30U-36HFN1-MP0; MOE30U-48HFN1-MP0
MOX230-09HFN1-MW5W; MOX330-09HFN1-MY5W; MOX230-12HFN1-MV5W;
MOX330-12HFN1-MW5W, MOX430-17HFN1-MT0W, MOD30-24HFN1-MU0W,
MOD33-24HFN1-MT0W
Light commercial MONO 3D Air
Conditioner
SERVICE MANUAL Mono DC
Table of Contents
1. Precaution
2. Part Names And Functions
3. Dimension
4. Service space
5. Refrigerant Cycle Diagram
6. Wiring Diagram
7. Fan Curves
8. Air Velocity Distributions
9. Electric Characteristics
10. Sound Level
11. Accessories
12. The Specification of Power
13. Field Wiring
14. Installation Details
15. Operation Characteristics
16. Electronic Function
17. Troubleshooting
18. Disassembly Instructions
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.
 This service is only for service engineer to use.

Summary

Precaution

1.1 Safety Precaution

Instructions to prevent injury to the user, people, and property damage.

1.2 Warning

Critical warnings regarding installation, operation, and handling of the product.

Dimension

Service Space

4.1 Indoor Unit

Required service space for installation and maintenance of various indoor unit types.

4.2 Outdoor Unit

Required service space for installation and maintenance of outdoor units.

Refrigerant Cycle Diagram

Wiring Diagram

6.1 Indoor Unit

Wiring diagrams for various indoor unit models.

6.2 Outdoor Unit

Wiring diagrams for various outdoor unit models.

Electric Characteristics

The Specification of Power

Field Wiring

Installation Details

14.1 Location selection

14.2 Indoor unit installation

14.3 Outdoor unit installation

14.4 Refrigerant pipe installation

14.6 Vacuum Drying and Leakage Checking

14.9 Engineering of electrical wiring

14.10 Test operation

Procedure for conducting test operations and confirming proper installation.

Operation Characteristics

Electronic Function

16.3 Main Protection

Details on protection mechanisms like compressor delay, temperature protection, and fan speed issues.

Troubleshooting

17.1 Indoor Unit Error Display

Table mapping operation lamp and timer lamp states to specific indoor unit error codes and LED status.

17.2 Error Display on Two Way Communication Wired Controller

17.3 Outdoor unit error display

17.4 Diagnosis and Solution

Step-by-step guides for diagnosing and resolving specific error codes and malfunctions.

Disassembly Instructions

Midea MOD31-24HFN1-MT0W Specifications

General

Type	Split Air Conditioner
Cooling Capacity	24000 BTU/h
Refrigerant	R32
Energy Efficiency Ratio (EER)	3.21
Coefficient of Performance (COP)	3.61
Power Supply	220-240V, 50Hz