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House alarm stopped working after 2 wires touched.

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Just replaced a double socket, switched the whole electric supply off, 2 wires touched and now the house alarm is no longer working. Opened the panel and checked the 3 fuses and they are all OK, check… Read More
kramvic Avatar
7m, 2d agoPosted 7 months, 2 days ago
Just replaced a double socket, switched the whole electric supply off, 2 wires touched and now the house alarm is no longer working. Opened the panel and checked the 3 fuses and they are all OK, checked the main fuse before the alarm box, when I remove this I hear a slight crackle through the internal speaker, when I put it back in it goes silent. Nothing lit up on the control panel but behind the keypad there are some green lights which are very faint. It's a scantronic 9448+style. If anybody is familiar with this, is there just the 3 fuses or if anybody has any ideas before I seek further advice.
Thanks.
kramvic Avatar
7m, 2d agoPosted 7 months, 2 days ago
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Best Answer
Have you checked the battery and done a reset? Stranger things!!

Edited By: getmeone on Oct 21, 2016 17:16

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#1
Have you checked the battery and done a reset? Stranger things!!

Edited By: getmeone on Oct 21, 2016 17:16
#2
getmeone
Have you checked the battery and done a reset? Stranger things!!
Not checked the battery, was working fine until this happened. Don't think there is a reset on this but will check. Didn't want to have to reprogram if possible but know what you mean by disconnecting all powers.
Thanks.
#3
Two pieces of wire touching each other while the power was off shouldn't do much damage unless the alarm system is independently powered to prevent the alarm system being disabled if someone cuts the mains. The crackling sound may indicate that their is a short circuit in the loop somewhere. Power down and check that the socket you installed is wired correctly, and there are no pieces of wire loose in the back of the plug. In fact, see if the alarm system works with the socket disconnected and the wires insulated with tape. If that works it's what you did with the socket that caused the problem. There may be a reset procedure for the alarm system, check the manual.
#4
Ask google
#5
illium
Two pieces of wire touching each other while the power was off shouldn't do much damage unless the alarm system is independently powered to prevent the alarm system being disabled if someone cuts the mains. The crackling sound may indicate that their is a short circuit in the loop somewhere. Power down and check that the socket you installed is wired correctly, and there are no pieces of wire loose in the back of the plug. In fact, see if the alarm system works with the socket disconnected and the wires insulated with tape. If that works it's what you did with the socket that caused the problem. There may be a reset procedure for the alarm system, check the manual.
Would flicking the MCB be enough or would it be best disconnecting and taping up? Also found this for a reset without losing memory.
The control unit can retain all programmed information and access codes if
both mains and battery power fail. When power is restored the control unit
will simply need resetting with either the user's or engineer's access code.
Thanks.

Edited By: kramvic on Oct 21, 2016 18:01: Addition.
#6
Right, so the alarm system has battery backing and probably some permanent memory should the battery drain. I would tape back the socket to isolate the problem. It conceivable when the wires touched the battery got drained but your settings are still stored. Power everything else back up, give the battery 30mins to recharge then reset using you access code, assuming you can.
#7
illium
Right, so the alarm system has battery backing and probably some permanent memory should the battery drain. I would tape back the socket to isolate the problem. It conceivable when the wires touched the battery got drained but your settings are still stored. Power everything else back up, give the battery 30mins to recharge then reset using you access code, assuming you can.
Thanks a lot for your advice, will give it a try.
#8
I had a similar problem which was solved by switching the power off at the mains and switching it on again. The alarm went off, I cancelled it, its been working ever since
#9
When powered on can you hear a slight buzzing noise in the box, where the transformer is? I had my electrics done a few years back and forgot to isolate the alarm. When turned on it fried the transformer but I didn't notice for a day or two until the battery drained and couldn't recharge. I had to replace the box as I couldn't replace the transformer. Is there a power light on the panel to show its connected to the mains?
#10
bkpatel
When powered on can you hear a slight buzzing noise in the box, where the transformer is? I had my electrics done a few years back and forgot to isolate the alarm. When turned on it fried the transformer but I didn't notice for a day or two until the battery drained and couldn't recharge. I had to replace the box as I couldn't replace the transformer. Is there a power light on the panel to show its connected to the mains?
There is a very slight buzzing/humming noise but very quiet. Tried disconnecting battery and mains, alarm box flashing outside. Only other thing I can think is to try a factory reset otherwise it may have to be a new box.
Thanks for your reply

Edited By: kramvic on Oct 21, 2016 22:10
#11
Just realized all the motion sensors are still working, don't want to do a factory reset in case control panel doesn't light up enabling me to turn outside bell box off if it goes off, or should it switch off after 20 minutes. Am thinking I may be best just buying another identical control panel and have that fitted.
#12
illium
Right, so the alarm system has battery backing and probably some permanent memory should the battery drain. I would tape back the socket to isolate the problem. It conceivable when the wires touched the battery got drained but your settings are still stored. Power everything else back up, give the battery 30mins to recharge then reset using you access code, assuming you can.
Have checked the socket and everything is fine, control panel won't light up apart from 4 very faint LEDs behind the number pad.

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