I'd like to get a handle on what it might be. Maybe the transformer? Any suspect parts in there that are known to cause this? Could the deterioration of any part also make the battery not change up correctly or otherwise produce the 'bat mis' warning at random intervals? So this is making me wonder if there is, in fact, a problem with a component that is gradually deteriorating and developing a tiny earth fault. Suspecting something may be loose in there, I take a (non conducting) pen and poke all the cables and connections to see if I can make it repeat the behaviour. All happy so far.įew hours later, power to whole house flicks off and immediately on again a second later. Anyway I bought a new battery and installed it in place of the old one. The action of moving it immediately caused the all the power the my house to turn off, and the outside alarm to sound (rather weakly). Carefully avoiding pulling on other wires too much I rotated the battery to read what it was rated at. I have read this means the internal 12V battery is on it's last legs.
It has been giving me 'bat mis +0001' messages once every few days. Have an (ex-ADT) Honeywell Galaxy 2-12 with CO12 'box'.
