Midea CTBU-18HWFN1-M User Manual

Revision C: 1607, Content updated.
Model Numbers:
Indoor Unit:
CTBU-09HWFN1-M(C); CCA3U-09HRFN1-M(C); CFAU-09HRFN1-M(C)
CTBU-12HWFN1-M(C); CCA3U-12HRFN1-M(C); CFAU-12HRFN1-M(C)
CTBU-18HWFN1-M(C); CCA3U-18HRFN1-M(C); MUEU-18HRFN1-M(C)
CTBU-24HWFN1-M(C); MCD-24HRFN1-M(C); MUEU-24HRFN1-M(C);
CTB-36HWFN1-M(C); MCD-36HRFN1-M(C); MUE-36HRFN1-M(C);
CTB-48HWFN1-M(C); MCD-48HRFN1-M(D); MUE-48HRFN1-M(C);
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;
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. Static Pressure
8. Electric Characteristics
9. Sound Level
10. Accessories
11. The Specification of Power
12. Installation Details
13. Operation Characteristics
14. Electronic Function
15. Solar Panel
16. Troubleshooting
17. 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 CTBU-18HWFN1-M Specifications

General

Cooling Capacity	18000 BTU/h
Heating Capacity	18000 BTU/h
Power Supply	220-240V, 50Hz
Refrigerant	R410A
Energy Efficiency Ratio (EER)	3.21
Noise Level (Indoor)	42 dB(A)
Type	Split

Summary

Precautions and Warnings

Safety and Operational Warnings

Essential safety instructions, warnings, and cautions for handling the air conditioner.

Product Identification and Features

Model Names, Part Identification, and Unit Features

Identifies models, parts, and details features for different unit types (Duct, Cassette, Console, Ceiling-floor).

Dimensions

Indoor and Outdoor Unit Physical Dimensions

Lists physical sizes and measurements for various indoor and outdoor unit models.

Service Space Requirements

Installation Clearance Guidelines

Specifies required clearance around indoor and outdoor units for proper installation and maintenance access.

System Diagrams and Wiring

Refrigerant Cycle and Wiring Schematics

Illustrates refrigerant flow and provides detailed wiring diagrams for indoor and outdoor units.

Performance Data and Specifications

Fan Curves, Electrical Specs, and Sound Levels

Provides fan performance curves, electrical characteristics, and noise level data for various models.

Installation Procedures

Location Selection and Unit Installation

Guides on selecting locations and installing indoor/outdoor units, including duct and cassette types.

Refrigerant, Drainage, and Vacuuming Procedures

Covers refrigerant pipe installation, drainage setup, vacuum drying, and refrigerant charging steps.

Electrical Wiring and Test Operation

Details electrical wiring practices and pre-operation testing to ensure proper system functionality.

Operation Characteristics and Electronic Functions

Modes, Protections, and Display Functions

Explains operating modes, safety protections, display icons, and diagnostic functions for unit operation.

Diagnostic Functions and Information Inquiry

Procedure for checking sensor values, frequencies, and operational data through the information inquiry status.

Troubleshooting and Diagnostics

Error Codes and Malfunction Resolution

Lists error codes for indoor/outdoor units and provides step-by-step solutions for diagnosing and resolving issues.

Key Component Inspection and Diagnosis

Guides on inspecting critical components like temperature sensors, compressors, and IPM modules.