Technical FAQs

Ask a Question

What does an OBF fault code mean on the ATV58 drives?

Issue:
What does an OBF fault mean on the ATV58 drives?

Product Line:
Altivar ATV58

Environment: 
All types

Cause:
OBF is over braking fault

Resolution:
Check the DEC time setting on the drive.  If it is very low, try increasing to allow the drive a longer ramp down time.

Check the Line voltage on L1 L2 L3 to verify that it is within specifications.  High line voltage will translate to high DC bus voltage.

​Would suggest to monitor the DC bus voltage. 

If  OBF appears on power up, verify that the display is not set to show the last fault on power up.

A dynamic brake resistor may be required if the load is overhauling.

Was this helpful?
What can we do to improve the information ?