Cause : Auxiliary fan missing comes when auxiliary fan is not connected or it is broken, can lead to overheating and potential damage.

AE80 fault in ABB ACS880 drive indicate Auxiliary fan missing. The auxiliary fan within the ABB ACS880 drive plays a crucial role in cooling the internal components. During operation, the drive generates heat, and the fan helps dissipate this heat to maintain a safe operating temperature.

• Check the auxiliary fan connection or replace the fan.