The control board is normally accessed thru the outside panel... behind a black plastic cover. The fuse is part of the ac recognition circuit. If it runs on 30 or 50 amp serviceand genset, are you sure you are getting adequate voltage thru your set-up to power the rig? If the circuit doesn't see at least 108 volts, it won't recognize it.
I haven't played with the loadmaster setup. I don't want to screw anything up. Is that where I need to go? If the glass fuse is bad, would it still run on LP and generator? My mh has a 50amp service.
Someday I will get to RV out of Florida and add color to my map.
If the Fridge works on AC with the generator then the problem is NOT the fridge.
Will both Air conditioners work? You may have A problem with the transfer switch. Another thing could be the cord adapter has A bad leg in it only feeding power to half the coach. Try running the fan on both AC units and see what happens. If problem is with transfer switch or cord adapter only 1 of them will work. If both of them will work problem could be the power management system.
Hope this helps.
Dennis