Browse FAQs

What causes an E-Flex drive to trip on overheating fault OHF?

Published date: 16 April 2020

E-Flex drive is tripping on OHF

Product line:
Altivar ATV61 E-Flex enclosed drives

All models, all serial numbers 

Cooling fans are not running or the thermal sensor may be bad    

Check the heat sink cooling fans to see if they are running.  If they are not running remove the fan connector and check to see if you have voltage on the terminals.  If you have good voltage then the heat sink cooling fans are bad. If you don't have voltage on the terminals you may have a bad power board and or drive.   To check the thermal sensor you can monitor the drives thermal temp % in Menu 1.2 monitoring. If the thermal % is jumping around erratic you may have a bad thermal sensor.

Was this helpful?

What can we do to improve the information ?

Can't find what you are looking for?

Reach out to our customer care team to receive information on technical support, assistance for complaints and more.