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ef fault?

I cannot set the alarm as when I type in my code and A to exit it flashes on 1 and when it does its cycle it goes of straight away and says EF. It also wont allow me to enter my code and B. How do I fix this

David
March 2014
Security Systems, Home Alarm SystemsFault Code Flashes
ef = exit fault replace the door contact ,

gts
March 2014
door contact o/c

gts
March 2014

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