E474, E500 — IPM temperature sensor error or IPM overheat

What does E474, E500 mean?

These errors indicate either a problem with the temperature sensor for the Inverter Power Module (IPM) or Power Factor Correction Module (PFCM), or that the IPM itself is overheating in the outdoor unit's inverter compressor.

• IPM not correctly assembled on the heatproof plate.
• Blocked inlet preventing proper cooling.
• Defective IPM module.

Click steps to track your progress.

1. 1

   Turn off the power to the air conditioner and ensure the outdoor unit's air inlets are not blocked by debris, leaves, or other obstructions.

2. 2

   Ensure the outdoor unit has proper airflow around it.

3. 3

   If the error persists after checking airflow, a qualified technician needs to verify if the IPM is correctly assembled on the heatproof plate.

4. 4

   The IPM module may need to be replaced if a defect is found.