Originally Posted by Roger2650
Will the EMS detect the open neutral and open ground without letting 240V through?
Yes, it will..... If there is any error condition either when you plug in OR if one occurs anytime WHILE you're plugged in, then the EMS will shut everything down BEFORE any damage can happen. It's like a GFI; the shutdown circuit is so fast that it can kill the input current before it can damage anything.
Any errors that DO occur will display an error code on a readout on your convenience panel, so you can tell what the problem is (assuming you have the fixed unit). On the portable unit, the code reads out in a small window on the device itself.
I know nothing about the Autoformer, so can't comment on it.