https://www.manualslib.com/manual/155220/Smeg-Df614be.html?page=32#manual - see the last item at the bottom of the page.
Bookmark that link above and maybe also download the manual and file it away for your own records.
https://www.espares.co.uk/advice/careandmaintenance/smeg-dishwasher-error-fault-codes-using-5-programme-leds
https://www.0800repair.com/help-advice/smeg-dishwasher-error-codes/
kfgk
November 2020