Power unit: Rectifier overtemperature

What does A05004 mean?

The alarm threshold for the rectifier's overtemperature has been reached, indicating excessive heat generation in the input rectifier stage. This can be due to overload or cooling issues. If the rectifier temperature rises by an additional 5 K, it will trigger fault F30037, potentially causing the drive to trip and risking damage to the rectifier components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the cooling fan for failure and verify its direction of rotation.

2. 4

   Inspect the line supply for any missing phases or issues.

3. 5

   Check for defects in an arm of the supply (incoming) rectifier.