First off, Voltage is not the same as amperage. You can have 122 volts through the smallest wire you can find but it won't run squat. You need to have the ability to do work which is what amperage is. Like the difference of putting water through a straw or a garden hose.
You need at least 20 amp potential to run the AC with any certainty. You need to find out if your compressor is trying to run or not.
AS for the 220 volt adapter, DONT DO THAT UNLESS YOU KNOW WHAT YOU ARE DOING!!! There is a big difference between household 220 and RV 120 50 amp!!!!! If you try and plug into household 220 you will fry all sorts of stuff. Again, If you don't know electricity don't do it!!!
Chris
