Have you plugged into the 50 amp outlet at your house before? It sounds like you got 240 volts possibly.
If you don't have the 50 amp wired correctly for 120/240 volt , as per this link....you most likely have done some damage.
You have to have four wires, and the the TWO 120 volt hot legs (that are always kept as separate legs in the RV to keep from getting 240 volts on a circuit), One neutral, and one ground wire..all correctly wired or it's a bad thing.
Click the 50 amp tab as well as the outlet testing tab in the link provided. It will show you the voltages and No voltages you should get from the four wires/positions in order to be correct.
If the outlet isn't wired correct, and you shot 120 volts down either a neutral or ground wire, then the RV most likely received 240 volts on a circuit, and fried some electrical things. Usually always the converter is toast.