Seems the general consensus is that it is taking longer to fill than time allowed. Check that both hot and cold inlet filters are clean.
Suggest you call CDA direct to get a definitive answer.
Customer Care Line:01949 862012
CDA WASHING MACHINE CI931IN SHOWS FAULT F02 ..not sure if this is your model..when you go to this page just scroll down the page and you will see what you need to read.do not fill any thing in.
Indesit or Hotpoint washing machine flashing 8 times or displaying error code F08 usually indicate "Heater relay can't be activated" or "heater relay stuck".
The heater relay on these machines (as at time of writing) is on the pcb, the main control board at the back of the machine. Sometimes they can get jammed, and freed with a gentle tap. Other causes of this fault listed are "check pressure switch, heater & module connections". Therefore this isn't an easy diy fix and if you don't know what a relay is or looks like it's best to get in an engineer for this fault.
Some descriptions on various models also still say "heater relay", or "heater relay can't be activated", or "heater relay stuck", but also add, "check pressure switch connections for heater, wiring and module connections".