Have you had this problem with the caravan alarm on a frosty morning?
Since we had the van from last April the alarm been fine, it a Stinger 310 model, This morning as I got up at 5.30am we was having our first cup of tea by 6am the van alarm went off, flew out the back door no one about, Phew Thanks god for that then turn the alarm off, had a look round all ok, turn it back on in the next 1/2 hour it went off again, could't see why?
So I look into it later, got back in the van turn it on then shut the van door it went off again, tried it again same thing happen, so now it turn off for a while, Look in thr van Handbook it said bright light from skylight can set it off but I got a piece of cardboard in the skylight to stop the light settting off the alarm since we had the van, but the other 2 little sky light one in the kitchen and the bathroom are open, Did wonder because it was a very frosty morning -4 today. would the cold weather have anything to do with it?
Had this happen to you and what did you do? Thanks Trevor123
Perhaps disabling the PIR, and monitor the alarm.
Its going to be cold again tonight, so a good test.
On the unicorn you need to remove the batteries.
I did have a IDM1 alarm on a Avondale were the pir was picking up Taxi radio signals and setting of the alarm, with the IDM, you had a led display that told you the offending sensor.
A new pir electronics board with a mod was the cure.
Lead acid batteries and dry-cell batteries all have reduced capacity as the temperature drops as well as reducing as they age - BUT - the design of the installation should have taken that lower capacity into account.
That's a reason why smoke detector batteries should be changed every year rather than allowed to gradually drop in capacity over 5 years or so.
Surely a modern caravan, fitted with the correct battery, should be able to function perfectly in these temperatures which aren't unusual for the time of year? I do wonder if caravans are "fit for purpose" if leaving them outdoors gives problems !
Hi Steve W
After the frosty morning we had, turn the alarm off for a while had a look at the caravan handbook it did say close all skylight blind, but I got a big cardboard fitted in the big skylight, but not the other two small one kitchen/bathroom,
Had a look at other forum about the Stinger alarm few people said they had problem with it on a frosty morning, But what I done is cut out two piece of cardboard to fit the other 2 skylight and put the alarm back on late afternoon so far ok,it -2 here this morning and it been ok so far so will keep a eye on it as it said the weather will be up to -3 one night this week , so we see what happen then,
Hope you got your problem sorted out? Trevor123
Like you, I found nothing wrong. I keep all my blinds drawn when the van is in storage, but as it was as black as the ace of spades at 6-30 in the morning i don't think it has anything to do with light. It was -4 here last night and yes you have guessed it, nothing happened at all.
I have asked Phantom tracking if they can shed any light on the subject, but heard nothing as yet, maybe their techies don't work at weekends.
Steve W
Lead acid batteries and dry-cell batteries all have reduced capacity as the temperature drops as well as reducing as they age - BUT - the design of the installation should have taken that lower capacity into account.
That's a reason why smoke detector batteries should be changed every year rather than allowed to gradually drop in capacity over 5 years or so.
Surely a modern caravan, fitted with the correct battery, should be able to function perfectly in these temperatures which aren't unusual for the time of year? I do wonder if caravans are "fit for purpose" if leaving them outdoors gives problems !
I am agreeing with you again Roger (thats twice today 
).
We get people phoning us saying that their smoke alarms are beeping during the night.
We can only advise them that the battery loses power when cold & to change the battery
Hyundai Terracan
Burstner Trecento 530
I thought I could see light at the end of the tunnel, but it was someone with a torch
I have just had a stinger 310 alarm fitted under warrenty. This is an extract from the user manual
"Please be aware that extremes of temperature can affect the operation of the PIR. With temperatures above 30 deg C the PIR’s ability to detect a human body is reduced, and therefore the sensitivity can be adjusted to improve detection. With temperatures below zero the PIR’s sensitivity will increase, and therefore the sensitivity can be reduced to eliminate false triggering." Hope this helps. Roger
The original post recalled a incedent that happen to us on January 7th 2012, I was awakened in the early hrs 3am by our back door ringing, followed by serious loud banging on the front door.Wondering what the hell was happening feering the worst that something had happened to my daughter who lives just around the corner, leaning out of the bedroom window discovered it was my next door neighbour with a flash light, and fire extinguisher telling me that my smoke alarm was ringing, fearing the worst that we had a fire inside the van.
On entering the van their was no smoke , the neighbours wife informed us that it had been ringing since 12oclock, but they could not locate the source, they sleep with a window open we do not..
Only way to stop the noise was removal of battery.
The van is 5 years old, I change the smoke alarm battery every year, hence the charge it had to ring constently for 3+ hrs non stop.
Just wondered if the components within the smoke alarm have a shelf life of 5 years.Next morning I Fitted a brand new smoke alarm purchased from Homebase.Peace has returned.
Last winter it was alot colder never had any problems.
Royston
Hi I'm not beening rude but what had the smoke alarm got to do with the very first reply I put on here? I.m talking about the Caravan alarm the one if someone break in to your van, not the smoke alarm,
Hope this had clear the problem here, Thanks Trevor123
Hi Trevor 123.
I had a word with Sargent Alarms technical support person, he supplied a modification kit, ( a piece of wire with connectors and a set of pictorial instructions. Took less than 5 Min's to fit. Once fitted you return all settings to the default and bobs your uncle problem solved ( I hope ) The wire arrived by next post, so all in all a satisfactory result.
Steve W
Snap!!!!
I had exactly the same thing this morning, Tracker control woke me a 6-30, flew down to storage yard, found nothing wrong, checked battery condition, OK. no sign of mice or any other small animal, so what now?
Steve W