Problem with DSC PC2550 alarm system

[dayna.karas@xxxxxxxxx]

We inherited a very old security system when moving into our older home 3 y=
ears ago.  Initially, everything worked fine.  Over the past year or so we =
have had trouble with the alarm going off at random times (usually in the m=
iddle of the night... of course!).  When I pushed *2 it said that our troub=
le codes were 1 (defective stand-by battery) and 8 (loss of time on system =
clock). =20

We powered down the entire system (unplugged backup battery for replacement=
 along with the transformer).  We got a new battery and when we powered eve=
rything back up, the alarm went off.  We quickly entered the master code an=
d it went off.  Then I reset the time/date/clock.  When checking *2 we had =
no trouble codes.

Now we seem to have a new problem... on the keypad, the zone 8 diamond is l=
it up and our Memory light is on.  I believe zone 8 is our fire zone.  Our =
system IS NOT armed and when we open any door, the full house alarm goes of=
f (not the door chime) just once.  So, when we press *3 it will show the va=
rious doors that we have gone out that set off the alarm.  I have tried pre=
ssing # to reset the Memory on the panel.  I am at a loss as to why the ala=
rm would go off when we open any door.  Has anyone heard of this?

At this point, I'm just trying to get the Ready light on so we can arm/disa=
rm and reset the system and get the alarm to stop sounding when we open doo=
rs.  I can't even get to that point.  Does anyone have any light they can s=
hed on this situation?  Any help would be greatly appreciated.