Option External Fault (CP-916)

What does EFO mean?

This fault occurs when an external fault condition is detected via the CP-916 option card, specifically when the inverter is configured for serial communication using this card. The trip condition (open or closed) is defined by parameter F9-01. This signifies that an external safety or process interlock, monitored by the CP-916, has been triggered, requiring immediate attention.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect wiring between the CP-916 option card and the external fault source for integrity.

2. 4

   Check for issues with the CP-916 card itself, such as loose connection or internal fault.

3. 5

   Ensure external fault detection (F9-02) is configured correctly, considering if detection should occur only when running or always.