5080 fault in ABB DCS880 drive indicates drive fan acknowledge. This means drive cooling fan feedback at the DI is missing.

1. Check the drive fan operation and connection.
2. Check the drive fan contactor.
3. Check the drive fan circuit.
4. Check the drive fan klixon.
5. Check the drive fan components.
6. Check the drive fan supply voltage.
7. Check the drive fan direction of rotation.
8. Check the drive door open.
9. Check the drive cooling air inlet (e.g. filter).
10. Check the drive cooling air outlet.