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Midea MEHS-12NIH1 - User Manual

Midea MEHS-12NIH1
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

  • H
    harringtonwilliamAug 13, 2025
    What to do if Midea Air Conditioner displays outdoor temperature sensor T4 error?
    • L
      Larry DavisAug 13, 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.
  • D
    Donna TurnerAug 17, 2025
    How to fix Midea Air Conditioner condenser coil temperature sensor T3 error?
    • J
      John BarnesAug 17, 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.
  • A
    Andrea WheelerAug 20, 2025
    What does it mean when Midea MEHS-12NIH1 shows compressor discharge temperature sensor T5 error?
    • M
      Matthew BondAug 20, 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.
  • D
    Diane Odonnell MDAug 25, 2025
    How to troubleshoot Midea MEHS-12NIH1 Air Conditioner evaporator coil temperature sensor T2 issues?
    • O
      omitchellAug 25, 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.
  • J
    Jesus VillarrealAug 28, 2025
    What should I do if Midea MEHS-12NIH1 shows indoor room temperature sensor T1 error?
    • X
      xhillAug 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.
  • B
    Brandon JohnsonAug 31, 2025
    What to do if Midea MEHS-12NIH1 indicates IPM malfunction or IGBT over-strong current protection?
    • D
      dawnmartinezSep 1, 2025
      If your Midea Air Conditioner indicates an IPM malfunction or IGBT over-strong current protection, inspect the IPM and IGBT for faults.
  • J
    Jenna PearsonSep 4, 2025
    How to resolve Midea Air Conditioner outdoor unit EEPROM parameter error?
    • S
      smalljorgeSep 4, 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.
  • B
    Brandon CoxSep 8, 2025
    How to fix Midea MEHS-12NIH1 Air Conditioner indoor unit EEPROM parameter error?
    • A
      Abigail TaylorSep 8, 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 during operation.

Warning

Critical warnings regarding electrical hazards, installation, and product misuse.

Wiring Diagram

Installation Details

Wrench torque sheet for installation

Installation for the first time

Step-by-step guide for initial installation, including leak testing and evacuation.

Operation Characteristics

Electronic Function

Main Protection

Operation Modes and Functions

Troubleshooting

Indoor Unit Error Display

Lists error codes displayed on the indoor unit and their meanings.

Outdoor unit error display

Explains LED status indicators on the outdoor PCB for error detection.

Diagnosis and Solution

Provides troubleshooting steps and solutions for specific error codes and malfunctions.

Midea MEHS-12NIH1 Specifications

General IconGeneral
TypeSplit Air Conditioner
Cooling Capacity12000 BTU/h
RefrigerantR410A
Inverter TechnologyYes
Power Supply220-240V, 50Hz

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