Alarm PIR won't go off

Greenst

Hope someone can help,
I 'inherited' an alarm system with my house, I know it's old at least 15 years old and was fitted by a small company which I don't have details of. I don't know the make of the alarm, the alarm box that has all the gubbins in it doesn't have any names on it, just a white box. The boxes on the outside of the house are plain. so not much to go on!
The sensor in the living room is constantly on even though there is no one in there or no movement, just wondering if this is an easy problem to sort out or if it's going to be a case of having to find a local alarm company to come out, me thinks mega ££££s !
I don't have a manual or engineers code either, have looked on the internet for information about PIRs not going off (e.g. just stays red all the time) but can't find anything, not sure if they have batteries in them or if they are fed from the mains, it's a wired system and if the mains fails then the alarm beeps for a few seconds in the house.

Alias_Omega

Contact local alarm company for a quote. A world of pain if you open the PIR without the panel in engineer/maintenance mode.

The alarm company will identify the system, they can do this from just looking at it, or opening the panel up and taking the name /model from the PCB.

I would guess no more than £60 (£15 for the PIR, then £45 to fit & test it).

martyn05

Try wiping the front of the PIR sensor with a damp cloth, if there is a large build up of grime on it, it may cause problems. We have an old alarm system in our house and every year it gets serviced, the engineer always wipes the front of the sensors. If you still have no joy, get a local company to come have a look for you. We pay £44 for an annual service.

victor2

Good advice above.
Assuming you get a man to look at it and it hasn't been serviced for years, there's a good chance your battery/batteries may be defunct and need replacing in addition to the PIR sorting.
Neglected replacing mine once and I was at work while DD was ironing at home. Iron tripped the circuit breaker, I got a phone call saying there was no electricity in the house, so I said to just manage and I'll be home in a few hours. 10 minutes later I got another call, with the alarm sounding in the background and a slightly irritated DD quoting my "nothing to worry about, it'll be fine!"
There's often a battery in the panel and the bell box, but an alarm engineer will know that.

securityman

Is there not a name on the key pad where you put your number in?

What happens when you try to set the alarm.
Is that zone beeping and the alarm will not set?
You could omit that zone on the keypad or you could remove the cover and twist the Zone NC and C together. Rest the tamper alarm with your user code if it goes off when you remove the cover.
Then the alarm should set, but that PIR with not be protecting your house, but latest you will be able to set the rest of the alarm for now.



If you want to change the PIR......
Open cover, put in user number if alarm goes off on tamper. Look to see if it's a wired alarm. It will have 4 or 6 wires connected.
N/C, C.
12v+, -
Tamper +, -
Note the colors used.
Remove the wires and snip the 12v+ end of the wire when you remove it so not to short it out and pop the aux fuse.
Fit new PIR and connect wires.
Fit cover and reset alarm with user code and test.

If not find your local alarm guy/co or ask a friend if the know any one to help.

What ever you do good luck.

If it is a wire free, remove the battery to try and reset it, test the voltage of the battery to see if it ok when you have it out aswel.