Cause : ENABLE circuit (safety stop circuit) failure comes when a problem with the circuit responsible for enabling the drive to operate. This circuit is crucial for the drive's overall functionality and safety.

"ecf" fault in Fuji FRENIC-VG drive indicate "ENABLE circuit error". This means there is an issue with the drive's enable circuit. The enable circuit is responsible for controlling the drive's readiness to operate, and any fault in this circuit will prevent the drive from running.

Troubleshooting Steps:

1. Check Wiring and Connections:

   • Inspect all wiring and connections related to the enable circuit, ensuring that they are secure and free from damage.
   • Verify that the enable signal wiring is correctly connected to the appropriate terminals on the drive.

2. Verify External Control Circuits:

   • If an external device (like a PLC or safety relay) controls the enable signal, check that this device is functioning properly and that it is correctly wired to the drive.
   • Ensure that the external device is providing the correct enable signal when required.

3. Review Parameter Settings:

   • Check the drive's configuration settings, especially those related to the enable circuit or safety functions. Ensure that these parameters are set correctly for your application.

4. Check for Electrical Noise:

   • Ensure that control wiring, especially the enable signal wiring, is properly shielded and routed away from sources of electrical noise, such as power lines or motor cables.
   • Verify that all control wiring is properly grounded to minimize the effects of interference.

5. Test the Drive Internally:

   • If possible, disconnect external enable control devices and manually test the drive's enable function to see if the fault persists.
   • This can help determine whether the issue is internal to the drive or related to external control circuitry.