In ABB drives, fault 16 indicates an earth fault, also known as a ground fault. This means the drive detects a current leakage path between the output and the ground. Here's what you need to know about fault 16 and how to troubleshoot it:

Cause:

There are several possible reasons for an earth fault in your ABB drive:

• Damaged motor windings: Internal issues within the motor windings can cause current to leak to ground.
• Faulty wiring insulation: Damaged or loose wiring insulation between the drive and the motor can allow current leakage.
• Drive issues (less common): In rare cases, the fault might originate from internal problems within the ABB drive itself.

Troubleshooting Steps:

1. Safety First: Absolutely ensure the system is completely powered down and locked out before attempting any troubleshooting procedures.
2. Check Wiring: Inspect the wiring between the drive and the motor for any visible damage or loose connections. Tighten any loose connections and repair or replace damaged wires.
3. Motor Tests (Optional): If possible, disconnect the motor from the drive and see if the fault persists. This helps isolate the fault to the motor itself. Consider performing an insulation resistance (IR) test on the motor windings to check for internal damage.
4. 4. Drive Parameters (For advanced users): While less likely, consult the ABB manual for your specific drive model to see if there are any ground fault monitoring parameters that can be adjusted.