Gfi is tripped, pressing test will have no effect because test button is equal to manual trip, 1000 watt inverter should be just powering fridge, regular gfi's in rv are not in circuit with the inverter. Turn off inverter, push the reset button on the inverter. It should go in. Turn on inverter and should have ac out.
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.