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Midea MEHS-22NIH2 - User Manual

Midea MEHS-22NIH2
61 pages
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Revision A: 1403100001, Content updated.
Model Numbers:
MEHS-09NiH2/MCHS-09NiH2 MEHS-09NIH1/ MCHS-09NiH1 MEHS-12NIH2/ MCHS-12NiH2
MEHS-12NIH1/MCHS-12NiH1 MEHS-18NIH2/ MCHS-18NiH2 MEHS-22NIH2/ MCHS-22NiH2
nEOLA MOnO SpLIt dC InVERtER
AIR COndItIOnER
SERVICE MAnUAL
Mono DC
Table of Contents
1. Precaution
2. Dimension
3. Refrigerant Cycle Diagram
4. Wiring Diagram
5. Installation Details
6. Operation Characteristics
7. Electronic Function
8. Troubleshooting
9. 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.

Table of Contents

Questions and Answers

  • A
    andrewmoonAug 13, 2025
    What to do if Midea Air Conditioner displays outdoor temperature sensor T4 error?
    • J
      Jeffrey PearsonAug 14, 2025
      If your Midea Air Conditioner is displaying an error related to the outdoor temperature sensor T4, test or replace the outdoor temperature sensor T4.
  • M
    Michael RoblesAug 17, 2025
    How to fix Midea Air Conditioner condenser coil temperature sensor T3 error?
    • N
      nicole17Aug 18, 2025
      To fix an error related to the condenser coil temperature sensor T3 on your Midea Air Conditioner, test or replace the condenser coil temperature sensor T3.
  • R
    Robyn CooleyAug 21, 2025
    What does it mean when Midea Air Conditioner shows compressor discharge temperature sensor T5 error?
    • J
      Jaime BurtonAug 21, 2025
      If your Midea Air Conditioner displays an error indicating an open or short circuit in the compressor discharge temperature sensor T5, test or replace the compressor discharge temperature sensor T5.
  • C
    Connor CannonAug 25, 2025
    How to troubleshoot Midea MEHS-22NIH2 evaporator coil temperature sensor T2 issues?
    • F
      fernandezwilliamAug 26, 2025
      To troubleshoot issues with the evaporator coil temperature sensor T2 on your Midea Air Conditioner, test or replace the evaporator coil temperature sensor T2.
  • K
    Kenneth RussellAug 28, 2025
    What should I do if Midea MEHS-22NIH2 Air Conditioner shows indoor room temperature sensor T1 error?
    • S
      Susan HardinAug 28, 2025
      If your Midea Air Conditioner is showing an error related to the indoor room temperature sensor T1, test or replace the room temperature sensor T1.
  • S
    Scott MartinSep 1, 2025
    What to do if Midea MEHS-22NIH2 indicates IPM malfunction or IGBT over-strong current protection?
    • W
      williamscharlesSep 1, 2025
      If your Midea Air Conditioner indicates an IPM malfunction or IGBT over-strong current protection, inspect the IPM and IGBT for faults.
  • D
    Daniel MaySep 5, 2025
    How to resolve Midea Air Conditioner outdoor unit EEPROM parameter error?
    • R
      richard46Sep 5, 2025
      To resolve an EEPROM parameter error on the outdoor unit of your Midea Air Conditioner, check the outdoor unit EEPROM parameters and reset if necessary.
  • J
    jessicagilbertSep 9, 2025
    How to fix Midea Air Conditioner indoor unit EEPROM parameter error?
    • J
      Jason MooreSep 9, 2025
      To fix an EEPROM parameter error on the indoor unit of your Midea Air Conditioner, check the EEPROM parameters and reset if necessary.

Summary

Precaution

Safety Precaution

General safety guidelines to prevent injury and property damage.

Warning

Critical warnings and precautions related to installation, operation, and potential hazards.

Refrigerant Cycle Diagram

Wiring Diagram

Indoor Unit

Outdoor Unit

Installation Details

Refrigerant charging

Electronic Function

Main Protection

Operation Modes and Functions

Troubleshooting

Indoor Unit Error Display

Lists error codes (E0-E5, EC, P0-P4) displayed on the indoor unit and their meanings.

Outdoor unit error display

Diagnosis and Solution

Provides diagnostic steps and solutions for specific error codes like E0/F4 and E1.

Fan speed has been out of control diagnosis and solution(E3)

Open circuit or short circuit of temperature sensor diagnosis and solution(E5)

Refrigerant Leakage Detection diagnosis and solution(EC)

Troubleshooting guide for EC error related to refrigerant leakage detection.

IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)

Diagnostic steps for P0 error related to IPM or IGBT over-current protection.

Over voltage or too low voltage protection diagnosis and solution(P1)

Troubleshooting guide for P1 error related to voltage protection issues.

High temperature protection of compressor top diagnosis and solution(P2)

Diagnostic steps for P2 error related to compressor top high-temperature protection.

Inverter compressor drive error diagnosis and solution(P4)

Midea MEHS-22NIH2 Specifications

General IconGeneral
RefrigerantR410A
TypeSplit
InverterYes
Power Supply220-240V, 50Hz
Operating Temperature (Cooling)18°C to 43°C
Operating Temperature (Heating)-7°C to 24°C
Cooling Capacity22000 BTU/h

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