Tach 32 emergency power

I have a tach 32 stuck on emergency power. ENPN is low and I've tried injecting the I/O with no luck in correcting the problem. Had a bad storm over the weekend and they found it down on Monday. Ups is brand new and have 208 volts on all 3 phases. Tried swapping phases just in case but that didnt help either. Any suggestions?

IOD Board is what I'd change. This time of year I carry a spare

I think it should be high but not sure off the top of my head. Try injecting it in the car and the group IO. I have seen a configuration that had a fuse on the din rail to feed the input. And I’m sure you have verified you have 120vac coming out of XFMR1, yes?

Thanks for the help guys. Changed the IOD board and away she went