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.
Inverter compressor drive error.
Compressor discharge temperature sensor open circuit or short circuit.
P4 is an inverter compressor drive error.
Ac pro mini split troubleshooting p0 p4 error code.
Outdoor fan speed has been out of control.
F5 outdoor fan speed has been out of control.
F4 outdoor unit eeprom parameter error.
Requires a trained tech.
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.
P3 outdoor ambient temperature too low.
P2 high temperature protection of ipm module or compressor top.
Ipm malfunction or igbt over strong current protection.