Ray.....typically trailers, fifth wheels and gas motor homes have just the converter/charger. As the luxury level and battery capacity go up, the coaches typically add a combo unit that inverts, charges and converts.
A lot of these units have exterior circuit breakers and many have both internal and external fuses. Check yours to see if you have a fuse issue.
If yours is bad and you got good service out of it, think about replacing with the same unit to save on wiring and mounting changes.