F7801 fault in Siemens V70 Drive

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F7801 fault in Siemens V70 Drive indicates a Motor overcurrent. This means the motor drew more current than its permissible limit, which can be caused by a short circuit, aggressive ramping, or a heavy mechanical jam. Cause: The permissible motor limit current was exceeded.
  • Effective current limit set too low.
  • Current controller not correctly set.
  • Motor was braked with an excessively high stall torque correction factor.
  • Up ramp was set too short or the load is too high.
  • Short-circuit in the motor cable or ground fault.
  • Motor current does not match the current of Motor Module.

Remedy:
  • Reduce the stall torque correction factor.
  • Increase the up ramp or reduce the load.
  • Check the motor and motor cables for short-circuit and ground fault.
  • Check the Motor Module and motor combination.

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