Midea MCA3U-09HRFN1-M(C)

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.

Midea MCA3U-09HRFN1-M(C) Specifications

General

Model	MCA3U-09HRFN1-M(C)
Category	Air Conditioner
Cooling Capacity	9000 BTU/h
Refrigerant	R32
Power Supply	220-240V, 50Hz

Summary

1. Precaution

1.1 Safety Precaution

Instructions to prevent injury to users and property damage during operation and handling.

1.2 Warning

Critical warnings related to installation, operation, and electrical safety to prevent hazards.

2. Part Names and Features

2.1 Model Names of IndoorOutdoor units

Lists various indoor and outdoor unit model series and their corresponding capacities.

2.2 Part names of IndoorOutdoor units

Identifies and labels the main components of indoor and outdoor units with numbered diagrams.

6. Wiring Diagram

6.1 Indoor Unit

Provides wiring diagrams for various indoor unit models, showing connections for main board, sensors, and controls.

6.2 Outdoor Unit

Presents wiring diagrams for different outdoor unit models, illustrating connections to the main PCB, compressor, and sensors.

14. Installation Details

14.1 Location selection

Guidelines for selecting optimal indoor and outdoor unit locations to ensure proper function and accessibility.

14.2 Indoor unit installation

Detailed steps for installing various indoor unit types, including service space and hanging methods.

14.3 Outdoor unit installation

Procedures for the proper installation of the outdoor unit, including service space and mounting.

17. Troubleshooting

17.1 Indoor Unit Error Display

Explains error codes displayed on the indoor unit's LED status indicators for various malfunctions.

17.4 Diagnosis and Solution

Provides step-by-step troubleshooting guides for common error codes like EEPROM errors and communication malfunctions.

18. Disassembly Instructions

18.1 Indoor unit

Step-by-step instructions and diagrams for disassembling various indoor unit components like filters, panels, and motors.

18.2 Outdoor unit

Details the procedures for disassembling outdoor unit components, including panel plates, fan assemblies, and electrical parts.