I have the Multiplus 12/3000/120 (230V unit) on a sailboat wired for European standard 230V shore power. A worker at a boatyard in the US plugged it in to 110V US power and now I have a continuous overload fault. Is it possible or likely that the 110V power into the charger may have “fried” my unit? What suggestions are there for troubleshooting/reset/repair?