Power unit: Overtemperature depletion layer chip

What does A05001 mean?

The alarm threshold for the power semiconductor's depletion layer overtemperature within the AC converter has been reached. This indicates the semiconductor junction is overheating. If the temperature continues to rise by an additional 15 K, it will trigger fault F30025, which can lead to drive shutdown and potential component damage.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the cooling system for any failures, blockages, or reduced airflow.

2. 4

   Confirm the pulse frequency setting is not excessively high, as this can increase thermal stress.