P4
Midea P4 Error Code – Inverter Compressor Drive Error
Air Conditioner · CRITICAL Severity
What This Error Means
Inverter compressor drive error
Diagnostic & Repair Steps
1
Power Off Immediately
Switch off AC at breaker. P4 is a compressor drive error.
Switch off AC at breaker. P4 is a compressor drive error.
RESET
~2 min
2
Check Inverter PCB
Inspect outdoor inverter PCB for burn marks, swollen capacitors, or physical damage. ⚠️ Wait 10 min after power off for capacitors to discharge
Inspect outdoor inverter PCB for burn marks, swollen capacitors, or physical damage. ⚠️ Wait 10 min after power off for capacitors to discharge
INSPECT
~15 min
3
Check Compressor Windings
Measure compressor winding resistance and insulation with multimeter/megger. ⚠️ Disconnect power before testing
Measure compressor winding resistance and insulation with multimeter/megger. ⚠️ Disconnect power before testing
TEST
~20 min
4
Check Wiring Between PCB and Compressor
Inspect UVW wiring harness from inverter PCB to compressor for damage.
Inspect UVW wiring harness from inverter PCB to compressor for damage.
INSPECT
~10 min
5
Replace Inverter PCB or Compressor
Based on findings, replace faulty inverter PCB or compressor. Engage qualified technician.
Based on findings, replace faulty inverter PCB or compressor. Engage qualified technician.
REPLACE
~60 min
Need professional PCB repair in Colombo?
Midea P4 errors often require board-level repair. Bottrixx, a trusted electronics repair company in Colombo 02, diagnoses and repairs Air Conditioner PCBs with fast turnaround and same-day service available.
Related Midea Error Codes