Why is there a delay action in the Bleep of Flush Door Contact on my home?

Have an "intelliSense -Securit 800L Alarm fitted to our house. Recently we noted that when entering through the front door (fitted with Flush door contact), the Zone light on the "panel" does NOT come up and the "BLEEP"sound has a "delayed action."

What could be wrong?
Mrs. N. waghela, July 2013


done
e manno,why do we bother ?

gts, July 2013
Do you need to know what type of spoon?.

Gts ain't taking the Micky here.He wants you to tap it lightly to free a sticky reed.

You could always pay a pro as gts has said if you don't understand the concept.

e manno, July 2013
call an engineer out ,pay through the nose if you don't have the manners to reply to us

gts, July 2013
could be a sticky contact try tap it with a spoon see if it is ok then

gts, July 2013
link Click here to see other fixes for Securit Intellisense.