Power unit: Overtemperature depletion layer chip

What does A05001 mean?

The alarm threshold for overtemperature of the power semiconductor's depletion layer chip in the AC converter has been reached. This indicates that the internal semiconductor components are experiencing high temperatures. If the depletion layer temperature increases by an additional 15 K, it will trigger fault F30025, which can lead to damage or failure of the power semiconductors.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for any failures or blockages in the cooling system, such as malfunctioning fans.

2. 4

   Review the pulse frequency setting and reduce it if it is excessively high for the current operating conditions.