Video: What does StF error code mean on an ATS48 Soft starter?

Issue :
Getting a  StF error code.

Product Line :
Altistart Softstart

Environment :
All

Cause :
StF is an Excessive Starting Time fault.  If the starting time exceeds the value of tLS, the soft starter will not run and displays the StF error code. The conditions for the end of starting are: line voltage applied to the motor (min. firing angle) and motor current less than 1.3 In.

Resolution :

Check the following:
In the Pro menu: Check that tLS (Max start time) is larger than ACC parameter (Acceleration time).
Check the mechanism (wear, mechanical play, lubrication, blockages, etc).
Check the sizing of the soft starter motor in relation to the mechanical requirement.
In the Set menu: Check ILt setting: if the value is too low, the motor may not reach acceleration and full speed.

Publicado para:Schneider Electric Portugal