i seem to have lost the delayed facility when i enter the house. as soon as the pir is activated the alarm goes off. I have checked the user manual but i have been unable to find a reason for this or indeed a way of adjusting the delay from walking in to de activating the system

jason ross, January 2010

Do you have a contact on the door of your first point of entry, then the PIR you mention?

If I'm right and you have, the contact on the door that starts the Entry timer has 'stuck' - give it a tap with a screwdriver handle, then try the alarm again, if the alarm then works correctly, change the contact, it will only happen again.
If it still does not work, change the contact.

acorn, January 2010