Issue:
What is a possible cause of OSF fault on ATV31 or ATV312 drive?
Resolution:
OSF is a mains overvoltage fault (DC bus voltage too high). OSF is displayed if the drive is not in a run state when overvoltage is detected. If the drive is in a run state, and an overvoltage occurs, the drive will display ObF (over bus fault). When the drive is running, it is possible for the motor to regenerate voltage back into the drive.
If this causes the DC bus voltage to go too high, the drive will trip on ObF. One possible cause for ObF to occur is a decel time that the drive is not able to meet because of excessive inertia from the motor load. See FAQ on ObF for resolutions.
If this causes the DC bus voltage to go too high, the drive will trip on ObF. One possible cause for ObF to occur is a decel time that the drive is not able to meet because of excessive inertia from the motor load. See FAQ on ObF for resolutions.
- Check the line voltage at L1, L2, L3 on the drive terminals
- Compare the line voltage reading with the ULn display (SUP menu)
- Measure the DC Bus voltage
- Monitor line power for voltage spikes
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 at drive.products.support@se.com to 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:
Support | Schneider Electric Global (se.com)
Released for: Schneider Electric USA
