ABB F9 fault code meaning
ABB / F9
Series: ACS400
Motor overtemperature
drive
Meaning: Motor overtemperature condition as estimated by the ACS 400.
Possible causes
Source: ACS400 User's Manual Rev C (EN, official site)
Series: DCS400
Mains Undervoltage
DC drive
Meaning:
Possible causes
Source: DCS400 Manual (EN, official site)