BradleyAllen1
Member
I am experiencing an intermittent issue with some of our VFD's in a localized area. We have been having F114 microprocessor faults on a few of our drives. Most have been solved with a power cycle, but last week we had to replace the control unit on one of them, it wouldn't clear the fault. Im reaching out because now the NEW drive is showing the same symptoms. I was told to check the cooling fans for obstructions and blow out the drive with an EDS blower. That hasn't solved our issue. Im wondering where to go next? I see the PF manual talks about grounding requirements and im wondering if the issue could be there, as these drive go to the same groundbar inside the panel. Also noted, the output of the drive to these motors are all stranded cable, not shielded, and im wondering if there is some EMI at play here. Im reading up on Common mode current, but am fairly new to the topic. Anything helps, thanks in advance