2 flashes indicate a flooded base.
Unplug the appliance and take off the inspection panel below the door.
Be careful here as the exposed edges are razor sharp.
Drain any water in the base out.
Once drained, reset the appliance and try it again.
Watch through the inspection hatch to see if there is a leak.
If there is, you need to identify the source and cure the leak.
Press and hold the start button until the light goes out.
Select programme, press start and close the door.
(Sorry, you probably already know this part).
Hope this helps.