Dishwasher. We are having a problem with our Whirlpool ADP5540 dishwasher. We have just moved

Question

We are having a problem with our Whirlpool ADP5540 dishwasher. We have just moved into a new house with this model dishwasher and have tried running it on a number of cycles. It always seems to stop part way through and the start button then flashes three times. Any ideas what the problem is or how to fix it?