ERR-OC4
Midea ERR-OC4 Error Code – Compressor Overcurrent x4
Air Conditioner · CRITICAL Severity
What This Error Means
Over current protection of the compressor occurs 4 times
Diagnostic & Repair Steps
1
Power Off
Switch off immediately at breaker.
Switch off immediately at breaker.
RESET
~2 min
2
Allow System to Cool
Wait 30 minutes for compressor to cool.
Wait 30 minutes for compressor to cool.
RESET
~30 min
3
Check Refrigerant Charge
Incorrect charge causes overcurrent. ⚠️ Certified technician only
Incorrect charge causes overcurrent. ⚠️ Certified technician only
TEST
~20 min
4
Inspect Outdoor PCB
Check for burn marks or damaged IGBT.
Check for burn marks or damaged IGBT.
INSPECT
~15 min
5
Replace PCB or Compressor
Engage qualified technician.
Engage qualified technician.
REPLACE
~60 min
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