The manual guides you to check three causes: low refrigerant charge, clogged filter drier, or closed liquid-side EEV.
| Error Code | Description | Common Fix | |------------|-------------|-------------| | | IPM Module Overcurrent | Check compressor winding resistance, replace IPM board | | P4 | Compressor Discharge Temp > 115°C | Low refrigerant charge, expansion valve stuck closed | | E1 | High pressure protection | Condenser coil dirty, fan motor failure, overcharge | | Ed | Communication fault between ODU and IDU | Broken H1/H2 wiring, wrong addressing | | L5 | Outdoor fan motor stall | Replace fan motor or check DC bus voltage | midea vrf v4 plus service manual
Identify that P6 means suction pressure has dropped below 0.05 MPa for 3 minutes. The manual guides you to check three causes: