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What is an OHF fault on an ATV32 drive?

Published date: 28 February 2019

Issue:
What is an OHF fault on an ATV32 drive?

Product Line:
Altivar 32

Environment:
All

Cause:
Over heating

Resolution:
OHF [Drive overheat] • Drive temperature too high. • Check the motor load, the drive ventilation and the ambient
temperature. Wait for the drive to cool down before restarting.
Check to see if the fans are running.  Drive thermal state of 70% and above should allow the fans to come on.  
Under monitoring NON- menu.
THd [Drv.thermal state] % Drive thermal state.  100% = Nominal thermal state, 118% = "OHF" threshold (drive overload).

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