What Causes an EPF Fault on Altivar ATV31 and ATV312 Drives?
Resolution:
An EPF fault (External Fault) on Altivar ATV31 and ATV312 drives indicates that the drive has been stopped due to a signal coming from an external source. The drive is detecting a fault condition through one of its configured logic inputs during power-up or operation.
To Troubleshoot:
- Go to the FLT (Fault) menu on the drive.
- Check the parameter EtF (External Fault Assignment).
- Verify which logic input is assigned to trigger the EPF fault.
- Inspect the corresponding input wiring and signal status to ensure it is functioning correctly and not unintentionally activated.
If the EPF fault occurs immediately at power-up, it is often due to an active external input signal or incorrect configuration.
If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
Frequently Asked Questions - Schneider Electric (se.com)
If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us atdrive.products.support@se.comto create a case with our Technical Support Team.
If you are not located in North America, please contact your local Customer Care Center for assistance:
Released for: Schneider Electric USA
