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How to troubleshoot ObF fault in an Altivar 312 drive?

Published date: 05 June 2019

Issue:  
Getting ObF fault on an Altivar 312 drive.

Product Line:  
AC Drives and VFDs

Environment:  
Altivar 312 AC Drives

Resolution:  
If the drive trips while running, then check for power surges or spikes. Need to monitor for voltage surges and spikes. One may need to install a line reactor or a surge suppressor.

If the drive is tripping while decelerating, then increase decelerating time. You may also need to add a Dynamic Braking resistor. For DBR selection assistance, contact MTE Corporation http://www.mtecorp.com.

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