Norcold Fridge Problem

I have a 2017 5th Wheel with a double door Norcold fridge. We have been up in Alaska and all around the Yukon, BC, and Alberta where we encountered RV parks with poor electrical service. At two places we were on generator power and I know I was not getting the proper amps I need. My RV is designed to run on 50 amp but I use a 30 amp adapter like everyone else does. My fridge has always performed perfectly but now I have to put the temp setting on 9 to keep the temp inside in the safe zone. My question is did I damage my fridge by using low amperage power? It won't stay cold on straight propane either.