Hi There, I Have a WT740 and it displays the same code, it appears when the machine finishes a pump out. Opened up the back and removed the tubing and "basket" - all OK. Think it is an electrical fault. In my (untrained) opinion looks like a fault between the pump & PCB. However i cannot confirm this at the mo. If i can find out more i will let you know.
Mike
C00K1E
June 2008