Siemens · SINAMICS V70 Drives
This fault indicates a short circuit in the ground connection. It may appear when the main power supply is connected or during motor operation.
Click steps to track your progress.
Check the U, V, W, and PE connections on the drive to see whether the connections among different phases are short-circuited.
Power on the system again and observe whether the fault still exists after verification.
If the fault still exists after the above inspection, professional replacement and maintenance are necessary as the IGBT module in the drive is likely damaged.