At issue is a Solectria (now owned by Yaskawa) PVI 85 KW inverter that’s turning off and on. I was able to witness it powering off and on in the morning when I got there, but as the day went on, it stayed on. Errors present are “Power Derated” and “AC Contact Open”.
Most recent was the AC contact open error, and very likely the main issue is the AC Contactor, but that “power derated” error makes me nervous that the DGMI is bad, too.
The unfortunate thing about the DGMI possibly being bad is that Yaskawa no longer replaces DGMIs.
It’s probably still likely that the contactor replacement is worth the risk. I’ll update as I know more.