External Fault

What does EF0 mean?

This fault indicates an external condition has triggered a protective response from the inverter. The specific action taken by the inverter (e.g., ramp to stop, coast to stop, alarm) is determined by parameter F9-03. This is typically activated by an external safety circuit or process interlock.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review the setting of parameter F9-03 to confirm the expected response and verify if it aligns with system requirements.

2. 4

   If no external fault is apparent, temporarily bypass the external fault input (if safe to do so for testing) to confirm inverter operation.