How can I fix my Diplomat dishwasher that keeps tripping !?

I have had my Diplomat integrated dishwasher for about 2.5 years and never had a problem with it until the week-end. When it gets mid cycle - on any programme, it trips my electrics. I then have a dishwasheer full of water which I need to empty out. My partner pulled it out at the week-end and could'nt find anything wrong with it - then all of a sudden it started to work again. Its been on for about 4 washs since and it tripped again last night ! Does anyone else here have the same problem ? Apologies but I dont know the model - any advice greatly appreciated :-) Kind regards