All appliances and motors are required to have a name plate giving its specs. Quite often you will find this inside the fridge. If you find a sheet of paper with the fridges wiring, your in good shape.
The specs are not as much of an issue as the set up. I can't tell if this was mickey moused together just to make it work, or if this type of wiring set up is normal for the rv fridges. This thing is not dual fuel.