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Heat Pump
MH-SU110M-RN8L
Service manual
Midea MH-SU110M-RN8L Service Manual
All dc inverter
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Part 3 Control
Table of Contents
General Control Scheme Flowchart
Stop Operation
Standby Control
Startup Control
Normal Operation Control
Protection Control
Special Control
Part 4 Diagnosis and Troubleshooting
Electric Control Box Layout
PCB Introduction
Wiring Diagram
Check Code Table
Troubleshooting
Drive Module Failure
Compressor Replacement Procedure
Appendix
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Table of Contents
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Part 3 Control
3
General Control Scheme Flowchart
4
Normal Operation Control
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R32
Midea Building Technologies Division
Service
Manual
Aqua thermal Super Series
All DC Inverter
MBT Confidential
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Chapters
Part 3 Control
16
Part 4 Diagnosis and Troubleshooting
34
Table of Contents
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Summarization of Contents
Part 1 General Information
Unit Capacities and External Appearance
Details unit specifications and visual presentation.
Water Outlet Temperature Range
Defines the operational limits for water temperatures.
Part 2 Component Layout and Refrigerant Circuits
Layout of Functional Components
Identifies and locates key internal components of the unit.
Piping and Refrigerant Flow Diagrams
Illustrates refrigerant pathways during operation cycles.
Part 3 Control
General Control Scheme Flowchart
Provides an overview of system operation logic.
Stop Operation
Explains conditions and procedures for system shutdown.
Standby Control
Details how the system behaves when idle or in standby mode.
Startup Control
Outlines the sequence for initiating system operation.
Normal Operation Control
Describes component behavior during standard cooling/heating.
Protection Control
Covers safety mechanisms and error conditions.
Special Control
Explains advanced or specific operational modes.
Part 4 Diagnosis and Troubleshooting
Electric Control Box Layout
Maps components within the electrical control enclosure.
PCB Introduction
Details the main printed circuit boards and their connectors.
Wiring Diagram
Illustrates electrical connections for single and multiple units.
Check Code Table
Lists error codes and their recovery conditions.
Troubleshooting
Guides users through diagnosing common system faults.
Drive Module Failure
Addresses issues related to inverter and fan drive modules.
Compressor Replacement Procedure
Provides step-by-step instructions for compressor servicing.
Temperature Sensor Resistance Characteristics
Provides resistance values for temperature sensors at various temperatures.
Normal Operating Parameters of Refrigerant System
Lists expected values for key system parameters.
Table of Contents
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