I own an old C&K system 238, found in my home when I bought it three years ago. The keypads have always reported "System trouble - Low battery level".
Yesterday eventually I bought a new battery (Pb sealed - 12 V - 7 Ah) to replace the old one. When I opened the central cover, no alarm sounded; I extracted the old one and installed the new one. I was not sure of the correct installation, so I try to disconnect the negative pole of the newly replaced battery, and the alarm sounded (Alarm zone: "Tamper"). I reconnected the negative, closed the central cover and the alarm stopped after about 30 sec.
Today the message was still "System trouble - low battery level". The central was quite warm, and so the battery (i opened once more the cover to check battery temperature, without any alarm this time).
What is the problem? Is the battery recharging or should I have charged it before inserting in my alarm? Why the alarm sounded?
Thank you for any help.