What causes an OHF Overheating fault on the ATV320 drives?

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Issue:
ATV320 with Overheating Fault OHF.

Product Line:
Altivar 320, Machine Drives

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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