30 seconds with Google leas me here:
http://www.hotpointservice.co.uk/appliances/dishwashers/error-codes/
which suggests the anti-flooding protection has operated.
See also
http://www.ukwhitegoods.co.uk/help/fault-codes/dishwasher-fault-codes/3293-hotpoint-fdl-series-dishwasher-fault-codes
http://www.how-to-repair.com/help/hotpoint-aquarius-fdm-dishwasher-flashing-lights-and-there-fault-codes/
Check inside for leaks. carfully emtty water out o fthe base.
Check the flooding float switch and wiring.
Start using Google for yourself
XXX, February 2016
