Ahhh F4 on a castle, duff battery.
Knew I knew (sic) the code just needed a jog of the noodle.
You`ll need a 7ah Yuassa or equilivent.
Maplins or believe it or not B&Q sell them.
Not at our rates though, dont spend more than 26 quid.
Be warned when opening you panle there is mains electricity there, be careful. If unsure call in a pro.
If you do the job, after closing panel enter code and do as display says, job done.
Alarm
January 2011