Coleman Roof AC Help.. Sat upside down, now won't work!

Is the unit still on the floor or is it mounted on the trailer? If it's on the trailer, and if the trailer has a converter charger, it might be overloading the circuit. Try flipping off every breaker in the trailer except the AC breaker and then see if it will run. Or try running a heavy duty extension cable up onto the roof and test it that way. That will eliminate any other phantom loads that might be causing a voltage sag.