Ground Fault

What does GF mean?

A current short to ground exceeding 50% of rated current has been detected on the output side of the drive. This fault is enabled when L8-09 is set to 1. Persistent ground faults can indicate severe motor or cable damage.

• Motor insulation is damaged.
• Damaged motor cable creating a short circuit.
• Excessive leakage current at the drive output.
• Drive started during a current offset fault or while coasting to a stop.
• Hardware problem with the control board.

Click steps to track your progress.

1. 1

   Check the insulation resistance of the motor.

2. 2

   Inspect the motor cable for damage, remove any short circuits, and verify resistance between cable and ground terminal.

3. 3

   Reduce the carrier frequency if excessive leakage current is detected.

4. 4

   Reduce the amount of stray capacitance.

5. 5

   Set parameter b3-01 to 1 to enable Speed Search at Start.

6. 6

   Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.