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What can cause an FRF line frequency fault on the ATS48 soft starters?

Issue:
What can cause an FRF line frequency fault on the ATS48 soft starters?

Product Line:
Altistart ATS48

Environment:
All types

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.
  • Check to see if they are using a generator for power.  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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