that is rubbish ,you can google it and it will tell you what buttons to press i had the same prob but cant reme,ber the buttons,but you do not need to change the module,its not a fault
mm
October 2012
If its a WF620, WF640, WF840 or WF860 you will need to change the main module in the back of the machine. We stock them at £59.88 + post ready programmed. Go to our site at www.emwelec.co.uk or call us on 0115 9652118 Tony EMW Electronics