old alarm

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wetstring

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old alarm

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attended a call out today for an intruder alarm which following a power cut would not reset, on examining it and the instruction book found that it was 18years old, the seperate key panel was partially lit (some buttons lit)although the power light was off, but would not respond to any key strokes, the paperwork did not contain the engineers code.

i concluded that the key pad had an internal fault (possibly caused by a surge after the power cut) and was reluctant to remove either the control box cover or keypad cover as the anti tamper would have set off the alarm with possibly no way of disarming it, (apart from a hammer and a bucket of water) so i isolated it in case it did have a nuisance alarm and advised the client that it was best fixed with a new one.

later had a phone call to say that some lad down the road had come in to have a look, re energised it, taken the cover off and set off the alarm ,at which point it all started working ok, the keypad accepted the user code and its all tickety boo, did i do the wrong thing, is this a common remedy with

intruder alarms????

 
Badly designed reset circuitry - knackered battery can stop them resetting properly. Seen it loads of times. Disconnect battery, turn on mains and they power up OK. Sell them a new battery next time.

 
why not! i'v posted it in the section for intruder alarms to see if people who specialise in such things have anything to add.

 

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