Hello. My Miele dishwasher has stopped, with a displayed error code of F84. I switched it off, left it a while and turned it back on. It is currently working, but I would like to understand what went wrong and the likelihood of it happening again.

Your wonderful list of error codes says "Slide shutter positioning fault. Water path control unit position at intake."

I don't really understand that! Can someone provide a plain English translation?
Any assistance gratefully received!