problem with fisher and paykel TD 918 dishwasher?

This morning I put the washer on and about half way through the wash cycle it stopped and started beeping with the letters F1 indicated on the digital readout window. I do not have a user manual as we have only just moved into this house and so have no idea what the machine is trying to indicate. I have tried turning the washer off at the power source thinking it may reset itself but this did not work. Is there anyone out there that has an owner manual that can let me know what I have to do to get the thing running again please.