Fan

What does A581 mean?

A main cooling fan fault has been detected in the inverter unit. This indicates a failure in the drive's primary cooling system. While other fans may compensate and switching frequency might be reduced, prolonged operation with a main fan fault risks overheating and damage to the drive. The drive generates a warning and attempts to continue operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the warning persists, consider contacting an ABB representative for fan inspection or replacement.