Loose wire on the printed circuit board that drives the compressor bad printed circuit board or a bad compressor.
Mini split inverter compressor drive error.
P1 over voltage or over low voltage protection.
P4 inverter compressor drive error.
Compressor discharge temperature sensor open circuit or short circuit.
Outdoor fan speed has been out of control.
P4 is an inverter compressor drive error.
F4 outdoor unit eeprom parameter error.
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.
Ipm malfunction or igbt over strong current protection.
P2 high temperature protection of ipm module or compressor top.
P3 outdoor ambient temperature too low.
P0 ipm malfunction or igbt over strong current protection.
Ac pro mini split troubleshooting p0 p4 error code.
F5 outdoor fan speed has been out of control.