Diplomat ADP 8342 - beeping / flashing lights?

Hi,

I have a problem with my dishwasher Diplomat ADP 8342. I have read a few of the threads on this site but I still cant fix the problem.

My dishwasher was running fine then during a cycle it stopped and started beeping, I opened the diswasher and the first three lights were flashing and beeping. I've tried to reset the dishwasher but every time I close the door it starts beeping again.

I have checked the filter and that is fine, the water is also draining fine, what else could the problem be??

Any help would be SOO appreciated!