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    What causes a precharge fault (CRF1) on an ATV320 drive?

    Issue:
    What causes a precharge fault (CRF1) on an ATV320 drive?

    Product Line:
    Altivar 320

    Environment:
    All

    Cause:
    Charging relay control detected fault or
    charging resistor damaged.

    Resolution:
    • Turn the drive off and then turn on again.
    • Check the internal connections.
    • Contact Schneider Electric Product Support. 

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