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    What can cause an SSCr fault code on an ATS22 soft starter?

    What can cause an SSCr fault code on an ATS22 soft starter?

    Product line:
    Altistart 22  

    All models, all serial numbers

    Condition results in fault code 

    This fault code can be the result of several things.
    At a run command, the ATS22 expects to see current going to the motor.  If not, it will trip SSCr.  Check that the motor is electrically connected. 
    Check that the motor windings are not burned open or shorted.  Also verify the proper motor connections.

    Another cause is too much current through the ATS22.  A shorted SCR on the softstart or a welded contact on the internal shorting contactor will both cause SSCr trip. 
    Check the resistance through each pole, L1-T1, L2-T2, L3-T3, for indications of either condition.  Should expect 50K minimum ohm rating for an acceptable value.

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