Pre-wash and Wash light flashing. Indesit IDL 735 Dishwasher?

I have just installed a Indesit IDL 735 dishwasher and I put it on a test wash. The machine filled and carried out the prewash but when moving on to the main was it paused for a few minutes and then the prewash and wash lights started flashing. It has water in the bottom of the dishwasher which has been warmed.

The dishwasher will not initiate another wash even after a reset or turning it off by the mains.

Can anyone help?