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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 48

    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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