Cause : Fan speed comes when fan speed is under limit (parameter 206.06). Check fan feedback. See parameters 206.30…206.33 for individual failing fans.

An ABB ACS880 drive showing a AE92 warning "fan speed is under limit" warning indicates a potential issue with the cooling system. This can be critical, as the drive relies on proper airflow to prevent overheating and damage.

• Check fan feedback. See parameters 206.30…206.33 for individual failing fans.