My multiplus inverter charger has turned off after a suspected overload. This has happened once before and it turned itself back on. I am guessing that the multiplus tried the three times to restart itself and is now locked. I don't know what to do to get it out of the locked state. I have checked the fuse going into the multiplus as well as from the battery bank. I have tried the switch on the front several times. I have also turned the main power switch on and off as well as disconnected anything drawing AC from the unit. Thanks for any help you can offer.