F30015 fault in Siemens V70 Drive

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F30015 fault in Siemens V70 Drive indicates a Phase failure in the motor cable. This means the drive detected a loss of current in one or more output phases to the motor, suggesting a disconnected wire or unstable control loop. Cause:

A phase failure in the motor feeder cable was detected.
The signal can also be output in the following case: The motor is correctly connected, however the closed-speed control is instable and therefore an oscillating torque is generated.

Remedy:

  • Check the motor feeder cables.
  • Check the speed controller settings.

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