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light on alarm c&k securitech c023-23 1

Joined
24 Feb 2016
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United Kingdom
I.m looking after a house the alarm has been fine but today theres a red light on the number 3 and when i set it the sound is different i stood out side abd the set noise just carried on for 10mins the alarm did not go of but it did not set either anypne no what a red light under the number 3 indicates please..i.m despate cant sleep lnowing alarm not set
 

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