While you wait for answers, we may have found some information which could help you.
Click here for Error Drain PipeHow can I mend my Zanussi ZDLN1512 dishwasher?
Why is my SMEG Dishwasher showing E1 without water in tray?
Why is dishwasher not fully drained of water?
How to switch on beep on BEKO dishwasher?
K8D45517?
Which way up is the upper spray arm - with holes uppermost o?