I wonder whether you guys can help me. I have a Danfoss FP715 programmer that has suddenly stoped working. Both the LED status indicator lights do not come on whatever buttons I press. The rest of the display works normally except that there is what looks like a battery that is flashing next to the CH Status Indicator light. Does this thing have batteries? If so how do you replace them? Will it not work until I change the batteries? Thanks for your help.