Cause: Short-circuit/ground fault detected comes when a connection between one or more of the motor phases and the ground (earth) connection. This can also occur in the motor, cable, or drive.

siemens 7807 fault indicates Short-circuit/ground fault detected. This means a phase-phase short-circuit or ground fault was detected at the motor-side output terminals of the converter.

Troubleshooting Steps:

Follow these steps to correct siemens 7807 fault:

• Check the motor cables are correctly connected to the drive's output terminals (U, V, W).
• Verify that the ground (PE) connection to the motor and drive is secure.
• Visually inspect the motor cable for any signs of damage, cuts, or abrasions.
• Check the motor terminals for any signs of burning or shorting.