F0068 fault in WEG CFW500 Drive

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F0068 fault in WEG CFW500 Drive indicates Motor Overtemperature on a dedicated input. This means the motor's PTC thermistor detected excessive heat, triggering a hardware-level thermal protection trip.

 Cause:

  • Overload on the motor shaft.
  • High start/stop duty cycle.
  • High ambient temperature around the motor.
  • Loose contact or short circuit (3 k9 < RPTC < 0 k1).
  • Motor thermistor is not installed.
  • Motor shaft is stuck.


Remedy:

Check the motor shaft and driven load for mechanical blockages. Optimize duty cycles. Measure thermistor circuit resistances and secure connections.

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