Just purchased this last week. Today, plugged it into a 30amp receptacle at a friends work building. AC keeps powering on and off and will not cool. Refrigerator will not work at all. No power either propane or electrical. Turned microwave on and it instantly turned off and will not come back on. No power. My buddy checked each outlet and it’s showing 220 output. Shouldn’t that be 110 ? No fuses were blown or beakers tripped. Lights work inside and out. Awning works fine (electric) radio and tv come on Help !!