Hello. A week ago, zone 5 on my alarm tripped. When looking at zone 5, I found that the window sensor was starting to fall off. I scrapped the tape off and reattached. Thought all was well. Again this morning zone 5 faulted. Looking at the sensors I'm not seeing an issue. I do use zone doubling, though on this zone 5 (doubled would be 13) its not in use. Additionally I dont have a resistor anywhere on zone 5. System has been working fine for many years without faults and no changes have been made. One other item is the system chip on this unit is WAP20P-7.0 . Which I understand is older and wondering if this might be a bug.

Curious to get some insight in how to troubleshoot this

Some more additional info
The Zone Type is 3, the Response Time was 0 and Im changing it to 1 and Hardware is NC

 

The odds of it being a software/firmware issue are pretty close to non-existent.
If you are using zone doubling, there _has_ to be resistors in the circuit. There's simply no way for that trick to work without the resistor differentiation. The "low" zone has to have a 3K ohm resistor in the circuit & the "high" zone has to have a 6.2K ohm resistor.
Simple test: Short the input wire at the contact together. Does it stay stable? If yes, then the actual contact switch is failing. If no, you need to close the zone with a 3K at the panel terminals. If it stays closed at that point, then you have likely have damaged field wiring between the head end and the openings.

There is a slim chance that the zone input is failing, but that would affect both of the doubled zones.
INSTALLER MANUAL: http://www.nationwidesecuritycorp.co...all-Manual.pdf

 

Appreciate your response just as I was adding more info.. The trip is randomly happening its not always happening. I should still follow your test method? Concerning the resistors even though this zone type is setup as 3 and NOT a doubled zone, I should put a 2k resistor not 3k, right?

 

If it's _not_ a doubled zone then the correct resistor is 2K. Intermittent means that it's even more likely to be bad contact or wiring. A 20p _can_ have non-doubled zones configured for no EOL, if you have programming access with a keypad, you can check the zone settings.

Still most likely to be a field contact/wiring issue.

 

Hardware type is set to normally closed so the option for EOL isnt enabled.

Lastly, is there a recommended window contact with screw terminals?

 

In that case, you do your testing with a simple wire jumper.
Door/window contacts are pretty much a commodity item. If it's a visible contact, pick the ones that look closest to the ones you already have. There's really no practical difference.