Hi, Can anyone help out with a problem I have with my Optima 3 Alarm?. In recent months one of the zones is activated for no reason and the alarm sounds, it is always Zone 5. Fortunately, I don't need zone 5 as it now has a conservatory on the side that is alarmed. I can omit Zone 5 by remembering to press omit when I leave the house, but I'd really like to completely remove or disable the zone so I don't need to omit it in future. I've taken a look at the control panel, and tried combinations of removing one wire, then another, twisting the loose ends together etc. but I just get a tamper sound when I set the alarm. Is there an easy way to disable this zone?. ps I'm pretty sure It isn't the PIR as I've replaced it and the fault remains. Thanks for any advice. Pete