"Away" Gone Away From Vista 20P

I've installed an Ademco Vista 20P that regardless of whether you select "Away" or "Maximum" upon arming will virtually always go into "Stay" mode. Out of perhaps twenty arming attempts to arm in Away mode it armed properly, allowing the one interior zone to trip. I've programmed the Function keys for arming but using them or the keypad seems to make no difference.

The one interior zone (PIR) is the only one that's hardwired. This zone will show faulted when it is and trip when it actually does properly arm in Away mode, so I'm discounting any problem with the zone itself; the alpha keypad is displaying "Stay" even though I'm arming in Away mode.

I'm about ready to default the panel and start from scratch unless anyone might have any ideas. TIA for any of those!

 

ddrewyor,

Thank you much(!) for your reply. I was cleaning up some of my "Bookmarks" (Favorites), and opened this page not even recalling what it was.

I haven't been back to this location, a friend's residence a couple of hours away who lives here in Virginia part time since I posted the query, but when he returns I'll make the trip to try this. He wasn't too concerned about not having an interior zone, but as we both know a back-up option is never a bad thing.

Thanks again for your reply. I was too impatient waiting for one and this rather obviously became a back burner issue. Now I'm anxious to give it a shot!