37MUHA Fault Code EH b3 – Wired Controller Communication Malfunction
The indoor PCB does not receive feedback from the wired controller.
37MUHA Fault Code EH b3 – Wired Controller Communication Malfunction Read More »
37MUHA Fault Code PC 0L – Low Ambient Temperature Protection
Low outdoor ambient temperature protection is active.
37MUHA Fault Code PC 0L – Low Ambient Temperature Protection Read More »
37MUHA Fault Code PC 0F – PFC Module Protection
The outdoor PCB detects an abnormal PFC signal or low DC voltage.
37MUHA Fault Code PC 0F – PFC Module Protection Read More »
37MUHA Fault Code PC 0A – High Condenser Temperature Protection
Condenser temperature has exceeded the protection limit.
37MUHA Fault Code PC 0A – High Condenser Temperature Protection Read More »
37MUHA Fault Codes FH CC, EH C3 – Refrigerant Sensor Error or Out of Range
The indoor unit receives a refrigerant sensor fault or loses sensor feedback.
37MUHA Fault Codes FH CC, EH C3 – Refrigerant Sensor Error or Out of Range Read More »
37MUHA Fault Code PC 04 – Inverter Compressor Drive Error
The inverter compressor drive circuit has detected an abnormal condition.
37MUHA Fault Code PC 04 – Inverter Compressor Drive Error Read More »
37MUHA Fault Codes PC 03, PC 30, PC 31 – Pressure Protection
High- or low-pressure protection has stopped the system.
37MUHA Fault Codes PC 03, PC 30, PC 31 – Pressure Protection Read More »
37MUHA Fault Code LC 06 – Compressor Top or IPM Temperature Protection
Compressor top or IPM module temperature protection is active.
37MUHA Fault Code LC 06 – Compressor Top or IPM Temperature Protection Read More »
37MGRA EC 72 Lack phase failure of outdoor DC fan motor
Troubleshooting workflow for EC 72.
37MGRA EC 72 Lack phase failure of outdoor DC fan motor Read More »
37MGRA EH03 / EC07 / EC71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution
Troubleshooting workflow for EH 03, EC 07, EC 71.