Had a Power failure in my street on Thursday due to an underground cable
fault and of course all electric clocks in house stopped apart from the
clock in the CH control.Power was off 4-5 hours so can someone please tell
me why this clock managed to keep its time,no batteries in it that I know
of.Im very leased to know that it does keep going but would also like to
know how. Thanks
Older, mechanical, timeswitches use an electrically-wound mainspring.
Newer, electronic ones have a cell or two on the printed circuit board.
Some have an ultra low power clock chip that is read by the main clock
on restoration of power.
Thanks Sue.I have since found instruction for control,a Danfoss.It does
mention a battery and that if power is off over two midnights all settings
will be lost and that it must be reset to factory settings using a sharp
object such as a match
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