F22 — IPM (power transistor) overheating protection

What does F22 mean?

The IPM (Intelligent Power Module or power transistor) has overheated. This occurs if the overheating condition repeats 3 times within 30 minutes, causing the OFF/ON control panel LED to blink.

• Improper heat exchange around the IPM.
• Defective IPM (Power transistor).

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit at the main breaker and allow the unit to cool down for at least 30 minutes before restoring power.

2. 2

   Ensure the outdoor unit's heat exchange fins are clean and not blocked by debris, allowing for proper airflow.

3. 3

   If the error persists, contact a qualified technician to inspect the IPM and related heat exchange components.