Shutting down procedure for Comfort to allow work on component

[mark]

Hi,

What is the correct shutdown procedure on Comfort to allow work to be done safely on a door contact?

Specifically I need to remove the EOL resistors from the external door sensors as I suspect these maybe triggering a false alarm on cold winter nights).

I thought I would need to kill the power 1st (is this correct) so:

I put Comfort into Engineer Test mode, unscrewed the panel (no tamper alarm triggered so I thought I was safe).  Then disconnected the power (pulled the fuse), still ok,  and then disconnected the battery.  At this point the siren alarm went, so I reconnected the battery and dis-armed.

What did I do wrong?

In case you haven\'t guessed I\'m an end-user so please go easy on the jargon - thanks.

P.S. This forum is very good/helpful, thanks for keeping it maintained.

mark.

[admin]

The Siren is a self actuated type with an internal battery. If it loses power, the siren will go off to protect against a burglar cutting the wires.
You can connect the siren to a temporary 12V supply, or live with the noise while the system is off.
Pgordon has come up with a switch arrangement for this, see http://www.comfortforums.com/forum1/793.html
He has not got it working yet though

[mark]

Thanks for your reply/information.

But really?  wow thats really limiting.  So would a professional Security system Engineer in this case repair a clients system with the siren blearing out, or would they make the changes to the door contact with the power still on?

I guess what I\'m asking is: can I pull the wires from the (door contact) zone on the system board, remove the resistors from the actual door contact, and then re-insert the wires back into the zone with the power is still on -  without blowing a circuit somewhere?  Having naturally first set the system into a \'Engineer test mode \' to prevent tamper alarms etc.

I\'m just trying to fix a door contact without my neighbours jumping down my neck about the siren. 

thanks,

[hendy]

Yes, you can remove the EOL resistors with the power still on and won\'t blow any circuit somewhere

[mark]

awesome thankyou! 

[wiredhome]

Hi Mark
If you put the panel in engineer mode or even in user mode
you can work on the contact \"live\"

If the alarm is triggering by it self  i doubt it\'s the resistors, more likely a bad connection which breaks when its cold, and when the house warms up it remakes
so you need to check any connection on that zone.
if that doesn\'t fix it them you need to trace and check the cable there may be a nail/staple thru it.

[norrisp90]

To work on the system couldn\'t you:

1. Put the system in engineer test mode,
2. Climb a ladder to the bellbox and open it\'s cover,
3. Disconnect one of the battery terminals first then the wired supply. Use caution not to short any connections and some belboxs recommend waiting a while if it has triggered recently due to buildup of a higher voltage charge at capacitors driving siren/strobes etc.
   

Now the bellbox cannot alarm. When you\'re done with the system still in engineer test mode reverse the process?

Paul

[juwi_uk]

I dont know if this helps but what I found on my bell box was that I could short between 2 of the contacts to disable the bell (SAB).  This was documented in the bell box manual.  My cable exits my bell box through the back and directly through the wall so it\'s protected from being cut. 

So what I did was use a pair of spare wires in the siren cable running back to Comfort.  Now to silence the SAB (bell) all I have to do is connect the 2 wires together temporarily at the Comfort enclosure end whilst I\'m doing maintenance.  I could have used a switch here but I just connect the 2 ends into a simple connector block to make the join (remembering of course to disconnect again at the end). Nice and simple, but effective.

Julian

 

[ident]

Turning off Engineer test mode is in Engineer Menu 8,6,0