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.
