Electronic Alarms and Home Security Devices - PC5010 not in alarm, but siren keeps going off

Hi,

I just replaced a PC1555x, which had the installer's code locked out, with a used PC5010. I installed the board and programmed it. Everything is working, the system status looks good on the LCD keypad.

One problem though.....when I connect the siren to the bell + and - terminals, the siren goes off continuously. The system is NOT in alarm.

Any suggestions would be appreciated.
BTW, zones 7 and 8 terminals are left unconnected to anything, but I have nulled these zones in the programming.

Thanks!

Hmmm. That's odd. Where did you get the used panel? Could be it had a problem.

Or.... Could it have a second partition programmed, and you have a zone in alarm on that partition, but your keypad is programmed for just partition one? Go through the program and make sure everything is dasable for partition 2.

That's all I got for the moment.

Check your polarity. If you connect the siren in reverse polarity on a DSC system, it will sound.

I don't think the polarity is switched since I swapped the boards by disconnecting and reconnecting the wires one terminal at a time. In any case, I will reverse the wires to see if that does the trick.

I will also program it to ensure partition 2 is disabled.

I bought the used board off ebay for about $19 delivered. The installer's code and master code were reset to factory settings.

Thanks for the suggestions!

Check your polarity. If you connect the siren in reverse polarity on a DSC system, it will sound.
There you go again Ron, helping me learn somthing new every day. I didn't know that. :thinker:

It's one of those odd glitches you run into. The siren output has a reverse polarity voltage to supervise the bell circuit, and on some siren drivers, if connected in reverse, is enough to trigger the siren driver. It's mostly the separate driver cards, like the old Moose ones, but some of the self contained sirens will do it also.

Sorry for getting back to you guys so late, but the alarm is at my in-laws, and we go over there once a week only.

Anyways, I checked the 2nd partition, it is OFF.
I switched the bell polarity. It turned off the siren, but I still get a bell trouble, and the siren does not sound during an alarm. So, the bell polarity was correct to begin with.

Any other possible solutions?

Thanks!

Based on the infomation provided the only conclusion that remains is that the used board you tried to use is bad. There really are no settings that will activate the bell output without an alarm of some type or an indication of some type on the keypad display. If you put just a 1000 ohm resistor across the bell terminals, and you are still showing 12v output even after entering the disarm code, then the only thing remaining is to chuck that board in the trash.

The bell circuit is indeed locked in siren on mode 100% of the time.

This is what I did. I hooked up an automotive relay to be triggered via bell + and Programmable output 2. The siren + is hooked up to the bell+. The triggered part of the relay is hooked up the the siren (neg) and to the bell (neg). The attribute for the programmable output two is 10....for some reason, attribute 01 (sink during alarm mode) does not work.

The siren doesn't work when you run the siren test mode (2 sec siren test), but it does works under a real alarm!

The only thing not fixed is a bell trouble light which I can live with.