HELP CLASS B SHORE POWER ISSUE 220/110

sorry guys let me explain. the shed had a "welder" plug that i looked at and followed to the breaker box where i found it to be a 30amp. I did not know there was 220 30 amp and 110 30 amp. I went to lowes and bought the rv receptacle that matched my shore plug and I installed it where the welder plug was. I found later (after calling my much more qualified dad) that it was a 220 30amp double pole breaker, so the black and white wire were both hot. I went back to lowes and got the proper 30amp single pole breaker and wired it properly for 110. With all that done my rv does not recognize when i am plugged into shore now. As stated earlier though all my appliances and plugs, tv etc seem to be working properly. I can not check the ac which is my biggest worry. I have flipped all breakers and after scouring the net from when it happened until now, I am thinking my next step is to see if fuses in the converter are toast. I did not get any burnt smell. My converter does have a hum to it when on, but i have only owned this thing for a few days so maybe that is normal :( thanks for your help and quick responses guys