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Midea MHC-V18W/D2RN8 Service Manual

Midea MHC-V18W/D2RN8 Service Manual

Commercial air conditioners

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R32
Commercial Air Conditioners
Service
Manual
M thermal A Series Mono(18~30kW)
Midea CAC Confidential

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Summarization of Contents

General Information
Unit Capacities and External Appearance
Details unit specifications, models, and physical appearance.
Components Layout and Refrigerant Circuits
Layout of Functional Components
Identifies and illustrates key internal components of the outdoor unit.
Piping Diagrams
Illustrates the refrigerant piping connections and component layout.
Refrigerant Flow Diagrams
Shows refrigerant flow during different operating modes like heating and cooling.
Control
Startup Control
Details the procedures and logic for starting the compressor and fans.
Normal Operation Control
Outlines how components are controlled during normal heating, cooling, and DHW modes.
Protection Control
Describes safety features and error conditions to protect the system.
Special Control
Covers specific operational modes and advanced control features like oil return.
Role of Temperature Sensors in Control Functions
Explains the function and impact of various temperature sensors on unit operation.
Diagnosis and Troubleshooting
Outdoor Unit Electric Control Box Layout
Visual guide to the location of PCBs and electrical components in the control box.
Outdoor Unit PCBs
Details the different printed circuit boards (PCBs) within the outdoor unit.
Error Code Table
Lists all error codes, their descriptions, and potential causes for system faults.
Troubleshooting
Provides procedures and guidance for diagnosing and resolving common operational issues.
Appendix to Part 4
Contains supplementary data, such as sensor resistance characteristics.
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