My Smeg dishwasher is not intaking water. When I start the machine it begins for a while then bleeps twice. When I look lights are on. On looking at my manual it appears I have an E5 error. The previous cycle ran with no problem. I then put a new load in immediately but then this problem occured. I have looked at the filter and that was clean. Would anyone please be able to advice me on a quick repair before I have to admit defeat and get in an engineer. Many thanks