How to fix current detecting circuit abnormal of compressor module in Haier MRV 5-RC AS122MNERA?
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.
What to do if four-way valve reversing failure in Haier MRV 5-RC AS122MNERA Heat Pump?
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.
How to fix outdoor compressor discharging temperature (Td1, Td2) too high failure in Haier MRV 5-RC AS122MNERA?
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.
What to do for fan motor module hardware over current in Haier MRV 5-RC AS122MNERA?
If the fan motor module in your Haier Heat Pump experiences a hardware over current issue, the solution is to replace the fan motor.
What to do if radiator temp. sensor of compressor module is abnormal in Haier Heat Pump?
If the radiator temperature sensor of the compressor module is abnormal in your Haier Heat Pump, replace the variable frequency board.
How to resolve AT24C04 EEPROM communication failure in Haier MRV 5-RC AS122MNERA Heat Pump?
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.
How to fix emergency stop function switch failure in Haier MRV 5-RC AS122MNERA?
If the emergency stop function switch fails in your Haier Heat Pump, short circuit the CN18.
What to do if incorrect settings of quantity, address or capacity for outdoor unit in Haier Heat Pump?
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.
What to do if discharging temperature sensor Td1 and Td2 failure in Haier Heat Pump?
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.
What to do if outdoor unit compressor discharging temperature (Td1, Td2) too low failure in Haier Heat Pump?
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.
Outlines the different outdoor unit models available in the MRV 5-RC series.
Lists detailed technical specifications for various outdoor unit models.
Illustrates the piping system for outdoor unit models.
Provides a detailed wiring diagram for the main board and outdoor units.
Provides essential safety guidelines for the installation process.
Lists specifications for VP1-112B, VP1-180B, and VP1-280B valve boxes.
Shows the wiring diagram for the one-by-one valve box PCB.
Illustrates the installation connections for valve boxes.
Lists specifications for the VP4-450B one-by-four valve box.
Shows the wiring diagram for the one-by-four valve box PCB.
Illustrates installation connections for the VP4-450B valve box.
Shows a photo of the outdoor PCB and explains dip switch settings.
Provides a troubleshooting guide for various failure codes.
Lists sensor models, names, codes, and their resistance characteristics.
Introduces Smartlink technology and its installation/debugging guidance.
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General