Compressor discharge temperature sensor open circuit or short circuit.
Mini split inverter compressor drive error.
Inverter compressor drive error.
Loose wire on the printed circuit board that drives the compressor bad printed circuit board or a bad compressor.
F5 outdoor fan speed has been out of control.
Ipm malfunction or igbt over strong current protection.
Over voltage or too low voltage protection.
My pioneer 12000 btu mini split is showing p4 i pulled the cover of the control panel looking led i can t see any where are they located.
Ac pro mini split troubleshooting p0 p4 error code.
P0 ipm malfunction or igbt over strong current protection.
Outdoor fan speed has been out of control.
F4 outdoor unit eeprom parameter error.
P3 outdoor ambient temperature too low.
P4 is an inverter compressor drive error.
P4 inverter compressor drive error.