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    What is error t1CF on the Altivar Process 900?

    What is Thermal Sensor Error (t1CF) on the Altivar Process 900?

    Product Line:
    Variable Frequency Drives

    Applies to Altivar Process 900

    Drive displaying "t1CF" when wiring the sensor to "AI1" and "COM"


    t1CF: AI1 thermal sensor Error

    Probable Cause:
    The thermal sensor monitoring function has detected a thermal sensor error on analog input AI1:
    • Open circuit, or
    • Short circuit

    Remedy: Verify the sensor and its wiring, replace the sensor if needed

    This detected error can be cleared with [Auto Fault Reset] Atr or manually with the [Fault Reset Assign] rSF parameter after the cause has disappeared.


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