It's ok found this information on the website, fingers crossed it'll work. I've got the machine working now.
we turned the machine off at the power on/of button
pressed the power on/off back on while pressing the temperature button then immediately pressed the soil type button.
it gave us the diagnostic code, then we again turned the power off with the power on/off button and back on again
its now working again :)
Orla, October 2009