what is an F15 fault on a dyson washing machine?

After transporting my dyson washing machine down under i accidently left the transit gear on the drum and started the machine.This brought up an F15 fault. I took out the transit gear and cleared the fault with help from this website, however on a fill cycle it returns to F15 fault and i don't know what it is. To add to this i am told that dyson washing machines are not available in Australia yet so i am stuffed as they say. Can you help? Please.