Alec Fat Windburn wrote: » Hi All, Wondering if anybody has come across this issue and might have a possible fix. We basically have a HKC SW1070 system in place with wired sensors in place for most windows and doors. However over the last month, we have been seeing some issue where when we turn on the bathroom light (en-suite) , the alarm would go off indicating one of the window sensors in the bedroom zone has been triggered. We decided to change the ceiling light holder, since they weren't replaced since we moved in over 10 years ago. The issue didn't occur for over 6 days and now has come back. The weird thing is if I put the alarm in walk test mode and turn on the switch on and off, it only triggers the alarm/sensor twice every 10 attempts. Any idea what to look into next ? Maybe try and change the light switch or maybe the actual sensor needs replacing ? Appreciate any help in tracking down this mystery Thanks
altor wrote: » Usually indicates a faulty device, only real way of knowing would be having it tested with a multimeter.
Alec Fat Windburn wrote: » When you mean device, it is on the alarm side or light side, or either. ?
altor wrote: » The alarm side. Any device on the loop that sets off the alarm could be the issue. Could be one or a number of devices if more than one on the loop.
Luckysasha wrote: » Have heard of something similar recently. I think it was due to the CFL bulb in the light. Try changing the bulb to a standard filament type or an led and see if that helps
kub wrote: » Anytime a customer of mine has reported such a issue as this, we have always found the problem is with a device that is part of the intruder alarm system. Actually when was the last time your system had a professional maintenance check over?
Alec Fat Windburn wrote: » The system was put in about 2 years ago, but most of the window contacts were left in from the previous system as most of them still worked and few changed over. Last year we added another PIR, so the engineer was out and had a quick check and changed one of th vibration sensor. Guessing might be worth testing out th CFL theory otherwise contacting the engineer.
KoolKid wrote: » Are they all those or are there inertia shock sensors also?
Alec Fat Windburn wrote: » They are a mixture of everything in our house. When the new alarm system was put in, the engineer replaced couple of those sensors with new plastic ones, but both the bathrooms still have the old style ones still. There are inertia shock sensors too in most of the bedrooms, living rooms etc. Personally I have no idea why the engineer didn't bother replacing everything with newer style sensors when the new alarm was put in, guessing these sensors wouldn't have cost much, compared to the alarm system that was put in.
KoolKid wrote: » It was probably down to pricing. A check of the resistance on that zone would find anything dodgy.
Alec Fat Windburn wrote: » Cool, interestingly I put the alarm in walk test mode this afternoon and turned off and on the bathroom light over 50 times and it didn't go off once.. Which is really worrying, since the issue crops up randomly. Either way I think it is best to get a professional to have a look at it next week. The annoying thing when you turn on the alarm in the middle of the night when you go to pee and next thing the alarm goes off is getting pretty annoying, especially when you wake everyone in the house
Evolution1 wrote: » It isn't by chance happening when you close the bathroom door ?
Alec Fat Windburn wrote: » So wanted to follow-up regarding this issue and what the actual culprit was.. After starting this forum we continued having this issue, but the issue had moved from just the bathroom light switch triggering the alarm, to the kitchen light or even the front pir light turning on causing the alarm to be triggered (each of the latter incident only occurred once) and always the same zone would go off. When the engineer eventually had a look, he suspected that the zone in question could be faulty on the Alarm itself.. and he decided to change all the connection to another empty zone on the board, and every since the issue has gone away and never reoccured, It has been a good three weeks now. But thanks to everyone here for the help, just wanted to follow-up on what the culprit was eventually
