What can cause an (FrF) line frequency fault on the ATS48 Soft Starters?

FA174841

12 July 2022

Issue:
FrF fault on the ATS48 Soft Starters.

Product Line:
Altistart 48

Environment:
All models

Cause:
Line frequency is out of tolerance when control power is applied. The default setting for FrC parameter (Line Frequency) is AUt. The range for this setting is plus/minus 5%.

Resolution:
  • Change Parameter FrC from AUt to 60.  This changes the tolerance to plus/minus 20%.
  • Remove and inspect the green terminal strips at the bottom of the softstart.  Securely reinstall the strips.
  • Confirm that control power is present on CL1-CL2 terminals before a Run command is given.  Delay the Run command until nLP or rdY codes appear on the display.
  • Is the power supply from a generator?.  If so, check the frequency of the line to see if it is out of tolerance.  Upgrade the generator if necessary.  The FrC setting accommodates Class 1, 2 or 3 generators as defined by the Electrical Generating Systems Association.
  • Contact the Drives Product Support Group if the fault continues after corrective action.

 
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