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Midea MHA-V12W/D2RN8 User Manual

Midea MHA-V12W/D2RN8
112 pages
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M-Thermal A Series Split
Commercial Air Conditioners
R32
Service
Manual
Midea CAC
Confidential
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Midea MHA-V12W/D2RN8 Specifications

General IconGeneral
BrandMidea
ModelMHA-V12W/D2RN8
CategoryAir Conditioner
LanguageEnglish

Summary

Part 1 General Information

1 Unit Capacities

Details the cooling/heating capacities and model numbers.

2 External Appearance

Shows visual representations of outdoor and hydronic units.

Part 2 Component Layout and Refrigerant Circuits

1 Layout of Functional Components

Identifies key components within outdoor and hydronic units.

2 Piping Diagrams

Illustrates refrigerant and water piping configurations for units.

3 Refrigerant Flow Diagrams

Depicts refrigerant flow paths during different operating modes.

Part 3 Control

1 Stop Operation

Explains conditions leading to system shutdown.

2 Standby Control

Describes control logic for standby mode, including crankcase heater.

3 Startup Control

Details compressor startup sequences based on ambient temperature.

4 Normal Operation Control

Outlines component control during heating, cooling, and DHW operations.

5 Protection Control

Covers various protection mechanisms like high/low pressure and temperature.

6 Special Control

Explains modes like oil return, defrosting, force cooling, and fast DHW.

7 Role of Temperature Sensors in Control Functions

Identifies temperature sensors and their impact on system control.

Part 4 Diagnosis and Troubleshooting

1 Electric Control Box Layout

Shows the internal layout of electric control boxes for units.

2 PCBs

Details the main PCBs for outdoor and hydronic units with component references.

3 Error Code Table

Lists error codes, serial numbers, content, and remarks for troubleshooting.

4 Troubleshooting

Provides general warnings and detailed troubleshooting procedures for common errors.

5 Appendix to Part 4

Contains supplementary information, including sensor resistance data.

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