ABB acs601 short circuit fault

[lesmar96]

Hello,

I have a customer with a ABB ACS601-0025-2-000B1500001. I cannot seem to find a good troubleshooting manual online.

This is one vfd running one vacuum pump motor. They very randomly get a short-circuit fault and it shuts down. They can reset it and it will start again. They say that it trips out on average of once a week.

Since I couldn't find a good manual and my experience with this drive is limited, I wasn't sure what all this could mean.

Is it correct to assume that the vfd is detecting a short circuit on the output side of the vfd, either wiring or motor? Why is it so random?

 

[tarik1978]

Check this manual for the faults generated by the drive and what to do starting page 134
https://library.e.abb.com/public/bcf53a98d1bebc6dc1256d28004058a8/en_pfc5xfw_2.pdf

the short circuit fault is usually due either to:
loose connection
bad cable / bad insulation of the motor (you can use a Meggger to check )
faulty drive

 

[Gene Bond]

It could be too fast accel, bad current loop tuning, or water in the motor conduit as well...