Midea MSMBC-18CRDN1-MP0W User Manual

Revision A: 1502250001, Content updated.
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
SERVICE MANUAl
DC Inverter Air Conditioner
Table of Contents
1. Precaution
2. Part Names
3. Dimension
4. Refrigerant Cycle Diagram
5. Printed Circuit Board Connector Wiring Diagram of Outdoor Unit
6. Installation Details
7. Operation Characteristics
8. Electronic Function
9. Troubleshooting
10. Disassembly Instructions
Mini Split 3D
MSMBB-12CRDN1-MP0W
MSMBC-18CRDN1-MP0W
MSMBD-22CRDN1-MP5W
WARNING
• Installation MUST conform with local building codes or, in the absence of local codes, with the
malfunction, property damage, personal injury and/or death.
Models:
This Manual Is For Qualified Service Engineer Use Only

Midea MSMBC-18CRDN1-MP0W Specifications

General

Cooling Capacity	18000 BTU/h
Power Supply	220-240V, 50Hz
Energy Efficiency Ratio (EER)	3.21
Noise Level (Indoor Unit)	42 dB(A)
Refrigerant	R410A
Operating Temperature (Cooling)	17-32°C
Air Flow (Indoor Unit)	850 m³/h
Type	Split
Operating Temperature (Heating)	-7°C to 24°C

Summary

Precautionary Measures

Safety Precautions

General safety guidelines to prevent injury and property damage.

Critical Warnings

Critical warnings regarding installation, operation, and electrical safety.

PCB Wiring Diagrams

Outdoor Unit PCB Wiring

Installation Procedures

Wrench Torque Specifications

First-Time Installation

Steps for initial system setup, leak testing, and evacuation.

Refrigerant Addition

Indoor Unit Service

Outdoor Unit Evacuation

Operation Characteristics

Operating Temperature Ranges

Temperature limits for cooling, heating, and drying modes.

Electronic Functions, Protections, and Operation Modes

Main Protection Features

Key protection mechanisms for unit safety and longevity.

Operation Modes Overview

Details on fan, cooling, auto, drying, and forced operation modes.

Troubleshooting

Indoor Unit Error Indicators

Error codes and LED status for indoor unit malfunctions.

Outdoor Unit Error Indicators

Error indicators for outdoor unit malfunctions.

Error Code Diagnosis and Solutions

Detailed diagnosis and solutions for various error codes.

Main Parts Check

Disassembly Instructions

Indoor Unit Disassembly

Outdoor Unit Disassembly