I have a Diplomat ADP

Question

I have a Diplomat ADP 8520 dishwasher (possibly SMEG manufacture) which will not stop trying to empty. There are 4 leds lit reading left to right and it beeps. I have read on some forums about pressing the programme button 4 times or holding it down for ten seconds to clear the fault but neither of these solutions work. I thought maybe that the drain was blocked but I put the pipe directly into the sink and it empties ok, problem is, it does not stop.