That's a great point. If you had L1 charging current set to High before, it might have pulled the line voltage low enough that it was causing the charger to fault. Then maybe the dealership set it to Medium or Low.
I've been fiddling around with settings recently and I'm wondering if I inadvertently selected the maximum charge rate and if, after an extended period of overnight charging, this somehow caused the charger to show as faulty?
Mine had the same issue so I took the charging cable to bits throughout the end of the week and checked the charging cable of a multimeter and strangely there isn't anything apparently amiss with it at everything except it actually doesn't work when it's back together. Will arrange a new charging cable today and sell the former one as extras or fixes