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Haier MRV 5-RC AB122MCERA(M) - User Manual

Haier MRV 5-RC AB122MCERA(M)
243 pages
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MRV 5-RC Service Manual
SYJS-03-2019REV.A
Edition: 2019-03

Questions and Answers

  • B
    Brandon DavisSep 16, 2025
    How to fix current detecting circuit abnormal of compressor module in Haier MRV 5-RC AB122MCERA(M) Heat Pump?
    • M
      Megan KingSep 16, 2025
      If the current detecting circuit of the compressor module is abnormal in your Haier Heat Pump, replace the inverter control board with abnormal current detection loop.
  • J
    jamesrodriguezAug 25, 2025
    What to do if four-way valve reversing failure in Haier MRV 5-RC AB122MCERA(M)?
    • L
      Lori BrownAug 25, 2025
      In case of a four-way valve reversing failure in your Haier Heat Pump, the suggested solution is to have it correctly replaced by after-sales service on site and ensure the refrigerant is sufficient.
  • M
    Mary JohnsonAug 25, 2025
    How to fix outdoor compressor discharging temperature (Td1, Td2) too high failure in Haier Heat Pump?
    • E
      Elizabeth PeckAug 26, 2025
      If the outdoor compressor discharging temperature (Td1, Td2) is too high in your Haier Heat Pump, the suggested solution is to have the discharging temperature sensor replaced by after-sales personnel on site.
  • L
    Lauren BeckerAug 26, 2025
    What to do for fan motor module hardware over current in Haier MRV 5-RC AB122MCERA(M)?
    • K
      Karen PhillipsAug 27, 2025
      If the fan motor module in your Haier Heat Pump experiences a hardware over current issue, the solution is to replace the fan motor.
  • S
    samanthayangSep 18, 2025
    What to do if radiator temp. sensor of compressor module is abnormal in Haier Heat Pump?
    • K
      Kevin HoodSep 18, 2025
      If the radiator temperature sensor of the compressor module is abnormal in your Haier Heat Pump, replace the variable frequency board.
  • W
    William NelsonSep 23, 2025
    How to resolve AT24C04 EEPROM communication failure in Haier MRV 5-RC AB122MCERA(M)?
    • C
      Christopher AndersonSep 23, 2025
      To resolve AT24C04 EEPROM communication failure, AT24C04 EEPROM data check failure, or IM EEPROM data or communication failure in your Haier Heat Pump, replace EE.
  • S
    spencersandraSep 8, 2025
    How to fix emergency stop function switch failure in Haier Heat Pump?
    • E
      Emily DuffySep 8, 2025
      If the emergency stop function switch fails in your Haier Heat Pump, short circuit the CN18.
  • S
    Scott McintyreSep 9, 2025
    What to do if incorrect settings of quantity, address or capacity for outdoor unit in Haier MRV 5-RC AB122MCERA(M)?
    • C
      Cindy BradleySep 9, 2025
      If there are incorrect settings of quantity, address, or capacity for the outdoor unit of your Haier Heat Pump, the suggested solution is to research and lock the outdoor unit.
  • M
    Matthew HaysSep 3, 2025
    What to do if discharging temperature sensor Td1 and Td2 failure in Haier MRV 5-RC AB122MCERA(M)?
    • L
      larryvelezSep 3, 2025
      If the discharging temperature sensors Td1 and Td2 fail in your Haier Heat Pump, the solution is to have them correctly replaced by after-sales personnel on site.
  • H
    heatherespinozaSep 1, 2025
    What to do if outdoor unit compressor discharging temperature (Td1, Td2) too low failure in Haier MRV 5-RC AB122MCERA(M) Heat Pump?
    • P
      patriciamartinezSep 1, 2025
      If the outdoor unit compressor discharging temperature (Td1, Td2) is too low in your Haier Heat Pump, the suggested solution is to have the discharging temperature sensor replaced by after-sales personnel on site.

Summary

2. Specification

2.1. Outdoor Unit Specifications

Details technical specifications for various outdoor unit models, including electrical, piping, and performance data.

Part 2. One by one valve box

Part 3. One by four valve box

1. Specification

Provides specifications for the one-by-four valve box models, including capacity, dimensions, and pipe connections.

4. Wiring diagram

Shows the electrical connections for the one-by-four valve box PCB, detailing port definitions and component layout.

Part 4.

3. Control function

Explains the control logic for compressors, fans, and other system components, including protection mechanisms.

4. Failure code

Lists and explains various failure codes for outdoor units, their digital tube indications, and descriptions.

Haier MRV 5-RC AB122MCERA(M) Specifications

General IconGeneral
BrandHaier
ModelMRV 5-RC AB122MCERA(M)
CategoryHeat Pump
LanguageEnglish

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