Ademco Vista 20p keypad Carbon Monoxide Warning

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Old 10-11-18, 01:47 PM
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Red face Ademco Vista 20p keypad Carbon Monoxide Warning

Just replaced four Macurco CM-E1 Carbon Monoxide detectors, connected to my Ademco Vista 20p security system. The four units sucessfully self-tested and all showing green lights. However, the 20p keypad is reading "Alarm CO Carbon Monoxide." Entered the "off" key followed by security code, followed by the "off" key and repeated the sequence again to clear the error message. Still displaying the same error message. Tried disconnecting and reconnecting the detectors. Same error message. Baffled.
 
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Old 10-11-18, 03:55 PM
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How did you install the end of line resistor on the circuit?
 
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Old 10-12-18, 06:22 AM
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Originally Posted by MrRonFL View Post
How did you install the end of line resistor on the circuit?
Thanks,
This should have been a simple swapout. Resistor already installed and we didn't mess with it. The new Macurco detectors had upgraded connectors, so it wasn't plug & play, but the wiring scheme was the same, simply clipped off the crimp connectors and used wirenuts to attach the leads for the new units. They all self tested fine and lights are green on all units.
 
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Old 10-12-18, 06:18 PM
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If you wired the new detectors identically, did you check to see if the originals were configured as NO or NC connections? There is a jumper on the Macurco units that changes the function of the alarm relay.

Did you possibly make your connections to the trouble relay instead of the alarm relay?

If you take the alarm leads off of the alarm panel terminals, with the detectors powered up and check with a meter, are you seeing a short (closed contacts) or the EOL resistor value?

Did you double check against the wiring diagram?
https://www.surveillance-video.com/m...8-6-Manual.pdf
 
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