You already said you can live with only one AC. You also said that after «switching» power cords all your appliances, plugs, etc. but the 2nd AC, were running OK.
My 5¢: Leave it like that and ENJOY your stay. You'll fix back home.
In the meantime, do the readings that wmtire recommanded.
Back home, take time and try to understand your electrical setup and, if needed, come back on this forum to get answers to your questions.
Carpe Diem !