External Fault (Input Terminal S1)

What does EF1 mean?

An external fault has been triggered at multi-function input terminal S1. This signifies that an external device connected to S1 has activated an alarm function, or there's an issue with the wiring or configuration of terminal S1. This fault will typically cause the drive to stop operation.

Complete Troubleshooting Guide

1. 1

   Remove the cause of the external fault (e.g., reset the tripped external device) and then reset the fault on the drive or the multi-function input value.

2. 2

   Inspect the wiring connected to terminal S1 to ensure signal lines are properly connected and not damaged. Reconnect if necessary.

3. 3

   Verify that the multi-function input parameter for S1 (e.g., H1-01) is correctly set for external fault detection and that no unused terminals are inadvertently configured.