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What is an OHF Fault on an ATV312?

Published date: 18 February 2019

Issue:
What is an OHF Fault on an ATV312?

Product Line:
Altivar, ATV312 

Environment: 
All

Cause: 
Drive over heating fault.
Drive temperature too high

Resolution:
Check the motor load, the drive ventilation and the environment. Wait for the drive to cool before restarting.
Check the see if the cooling fan is running.
The threshold for OHF fault is 118% based on heatsink temp. 

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