Hitachi Inverter AC Error Codes
| Error Code | Description | Solution |
|---|---|---|
| E1 | Indoor/outdoor unit communication error | Check communication wiring between indoor and outdoor units. Reconnect or replace wires if needed. |
| E2 | Indoor unit coil temperature sensor error | Inspect the coil temperature sensor in the indoor unit. Replace it if defective. |
| E3 | High pressure protection error | Check refrigerant levels, clean the outdoor unit, and ensure proper ventilation. |
| E4 | Outdoor unit temperature sensor error | Inspect the temperature sensor in the outdoor unit. Replace it if faulty. |
| E5 | Compressor overload protection | Check for overheating in the compressor. Ensure the unit is properly ventilated and refrigerant levels are correct. |
| P0 | Inverter module protection | Check the inverter module for faults. Reset or replace the module if needed. |
| P1 | Voltage protection (high or low voltage) | Ensure the power supply is stable and within acceptable voltage range. Use a voltage stabilizer if necessary. |
| P2 | Compressor temperature sensor error | Inspect the temperature sensor attached to the compressor. Replace it if faulty. |
| P3 | Outdoor ambient temperature sensor error | Check the ambient temperature sensor outside the unit. Replace it if defective. |
| P4 | Compressor drive error | Inspect the compressor drive components. Reset or replace as necessary. |
| F0 | Indoor fan speed error | Check the indoor fan motor for faults. Repair or replace if needed. |
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