Ademco Vista 10 "OC" code issue

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I got that frustrating "OC" code on my Vista 10. Here's how I ultimately ma
naged to resolve the issue.

After coming home from a trip, I opened my door and entered my code on the  
key pad as usual ........and nothing happened. I did it over and over again
 but after 1-minute the alarm went off. The security monitoring firm called
 me but we could not get the alarm to stop blasting away. So with the rep s
till on the line, I (1) got a screw driver and disconnected the Ademco AC p
ower transformer from its wall socket and (2) opened up the Ademco control  
panel in the closet and disconnected the red wire from the battery. This st
opped everything,including the blasting loud alarm. However, when I reconne
cted up both AC and battery power all I got on my Vista 10's key pad was an
 "OC" code message. Hunting through the manual, looking at other web posts,
 and attempting different entries on the key pad did nothing. So I disconne
cted BOTH the battery and AC power transformer, and then reconnected ONLY t
he AC power transformer.  This solved the problem!!!!  Initially, I got a "
dl" code on the key pad display, but it went off within about 1-minute and  
everything was back to normal.

Apparently my battery had run down to the point that it was causing an open
 circuit (OC) condition to appear to exist. Don't know why. Don't know how.
  Placing the system on only AC power apparently allowed the Vista 10 to re
set on its own. I have now installed a new battery and it's fine too. (P.S.
 You may find you are able to just reconnect up your current battery after  
your system has reset using only AC power. However, if your battery is more
 than 3 years old you should probably replace it.)  

Re: Ademco Vista 10 "OC" code issue
On Monday, November 13, 2017 at 2:11:57 PM UTC-6, Songbill wrote:
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managed to resolve the issue.
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e key pad as usual ........and nothing happened. I did it over and over aga
in but after 1-minute the alarm went off. The security monitoring firm call
ed me but we could not get the alarm to stop blasting away. So with the rep
 still on the line, I (1) got a screw driver and disconnected the Ademco AC
 power transformer from its wall socket and (2) opened up the Ademco contro
l panel in the closet and disconnected the red wire from the battery. This  
stopped everything,including the blasting loud alarm. However, when I recon
nected up both AC and battery power all I got on my Vista 10's key pad was  
an "OC" code message. Hunting through the manual, looking at other web post
s, and attempting different entries on the key pad did nothing. So I discon
nected BOTH the battery and AC power transformer, and then reconnected ONLY
 the AC power transformer.  This solved the problem!!!!  Initially, I got a
 "dl" code on the key pad display, but it went off within about 1-minute an
d everything was back to normal.
Quoted text here. Click to load it
en circuit (OC) condition to appear to exist. Don't know why. Don't know ho
w.  Placing the system on only AC power apparently allowed the Vista 10 to  
reset on its own. I have now installed a new battery and it's fine too. (P.
S. You may find you are able to just reconnect up your current battery afte
r your system has reset using only AC power. However, if your battery is mo
re than 3 years old you should probably replace it.)

OC means you have a wiring problem between the panel and keypad, has nothin
g to do with the battery, my guess is you'll see the issue again real soon

dl appears when you initially power the panel as a wait time to stabilize t
he zones and it does last for 1 minute or until you press 0#

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