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.

Complete Troubleshooting Guide

1. 1

   Identify the external device or input connected to the CP-916 option card that is triggering the fault.

2. 2

   Verify the state of the external input based on parameter F9-01 (0=closed, 1=open for trip).

3. 3

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

4. 4

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

5. 5

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