Have you checked all of the breakers and fuses at the converter and within and outside the camper?
You should have a resettable breaker between the battery and your camper's converter (located on positive wire usually a few feet behind the battery). I'm not familiar with your model, but that's one of the first thing I would check. Here are two pics of common types. It might have a plastic cover (green and red are common).
You might also have a separate 30amp fuse. If so, check if its good.