Problems next to my AEG Favorit Dishwasher? My AEG Favorit dishwasher (F88080IA) do not clean my dish anymore and...

My AEG Favorit dishwasher (F88080IA) do not clean my dish anymore and is less than three years feeble. The machine keeps reporting "Sprinkler arm stoped" adjectives the time, but there is nothing that stop any of the three arms. Does anybody recogn this problems back and can help me to fix it?

Best
/Nick