Have a customer that had a Keypad Fire activated a couple of weeks ago. Did my investigation and signal did come for panel confirmed by Caller ID. History also indicated that a Fire Panic was indeed triggered. System has three(3) keypad and it is not possible to determine which on was triggered.
System installed less than 1 year. Customer did not believe that an employee would have press the button. Keypads are NX-148E's on a NX-8 V2 panel. It was dismissed as a unknown since nothing could be confirmed.
Two weeks later it happens again. This time the people that were on site were not the same as the first time and nobody was near any of the keypads. Customer says that something is wrong with the keypads.
Called tech support that it was said the with over 1 million keypad installed a faulty panic button has never happened or been reported. After much discussion with no resolve I decided to replace all three(3) keypads to keep a customer happy.
Upon removal of one keypad I found the remains of a dead spider. ???????????
Replaced all and re-program and test all ok.
Called tech support and asked about the keypad button operation. The interlaced finger traces on the board are shorted but the back of the buttons by a conductive rubber button. So I asked if the tech would mind popping the case off the board, power up and touch the area for the fire panic to see if it would trip. And if it did not to wet his finger and try again..................................... After a consultation with his boss the decision was that doing so could ruin the keypad and that they would not perform the test. I then asked if a spider could trigger a Fire Panic if it should decide to lick the traces on the board??????
I know it sound stupid but what is a guy in the field to do when he has a problem that can't be easily answered. I start thinking about the bizarre.
I know that the stats say that somebody (human finger) pushed the button but I can't prove it.
So this post should serve a number of purposes.1) Inform others of a circumstance that could occur and know it has happened before somewhere. 2) Ask for some thoughts on the subject to help with troubleshooting.
So any comments on the above???
BTW A dry or even a wet finger on the board will not trigger the alarm. It takes about 185 to 200 ohms to trigger since that is the value of the conductive buttons. And a dead short will not do it either. I may have to train a spider to lick a circuit board on command. :-)
Thanks for any insight.