I will remember this hint for when I am again abroad in the world of
220/50 cycle. I am currently in the US and have to run the washer off
the genset anyway in order to get 50 cycle power.
It could be a voltage issue.
The same happened to me here in one of the Caribbean islands where the
shore voltage was insufficient. If the problem has manifested itself
on shore power try running off your generator.
Hope this solves your problem.
Bootlegger of Mann