P2
Hitachi Compressor Overcurrent / IPM Protection

Unit stops with P2, often during heating mode on inverter models

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Mechanical compressor problem, Shorted compressor winding, IPM module overheating, Blocked outdoor coil or fan, Incorrect refrigerant charge

How to Fix / Troubleshooting

Safety first: This is a high‑risk fault. Do not attempt to open sealed compressor terminals or inverter modules.

User‑level steps:

  • Clean indoor and outdoor coils and filters: Ensure proper airflow to reduce compressor load.
  • Check outdoor fan: Confirm it runs normally and is not obstructed.
  • Allow cool‑down: Turn OFF the unit for at least 30 minutes, then try again.

If P2 recurs: A technician must check compressor current, IPM temperature, and refrigerant system. Component replacement may be required.

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Repair Difficulty

Professional Required 5/5

Required Part

Outdoor Inverter Module / Compressor
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