There are frequently some fuses on the refer control board too. I would also disconnect power (don't just turn it off from the front panel) from the refer by either removing the main fuse or the fuse that provides power to the refer. Let it sit for a minute or so and repower. You may get lucky and you just confused the control board.
Converter reverse polarity protection fuses are usually located on the converter itself and not on the main fuse panel.
Find a mobile tech (local campgrounds usually know a couple) and save yourself the hassle of hauling it to the dealer. If your dealer knows what you did it will likely not be a warranty repair anyway.