Come on, don't people search the Internet any more?
30seconds (less t8ime than to put up th equestion) gets me to:
F17
Inlet valve error detected
Check water supply to the washing machine is on
Check fill hose is not kinked
Check inlet valve filter
Check water inlet valve
See http://www.ukwhitegoods.co.uk/help/fix-it-yourself/fault-codes/laundry-fault-codes/3310-bosch-logixx-was-series-washing-machine-error-codes.html
Grief.
November 2015