Chubb Monitor Qx started warnings, the trouble LED always lit. The battery needed replacing.
Somethings in your house just keep working silently in the background. You eventually take them for granted, out of mind and out of sight. Such was my Chubb Monitor Qx security system, 452-4713, until the alarm started going off in the middle of the night, here in Toronto, Canada. It aurally called for attention. The trouble LED light remained lit, but with no station indicated. It turned out the battery was near dead. Once replaced it returned to its normal state of silence.
The Chubb Monitor Qx is a small pad type security monitor. Every so often it would sound a high pitched warning and the trouble LED would be lit. I would clear it and the problem would go away. Last night the warning went off seven times in the middle of the night. It needed attention.
The user manual is online from Chubb, but does not state much about the trouble LED. Do a “*23” + pin and see if it gives you a station code. Mine did not. Maybe one of the 8 stations need attention.
Downstairs I looked at the closed security box. Check that the phone line is firmly plugged into the phone outlet. Undo the cover. Check the three fuses with a multimeter to ensure continuity. All were Ok. The security system has a 12v 7ahr lead acid battery. This metered at 9v. I found my problem. Unfortunately for me there is no code from the Monitor Qx to tell me the battery is dying.
I got a new 12v 7aHr battery from my local electronics store for ~$12CAD, plugged it in, closed up the box and cleared the alarm. The trouble LED turned off, and all is back to normal.
Addendum May 23 2014 Steve, a poster, says that if you disconnect the battery for too long the alarm will reset itself and you will lose your settings. This is bad. An alternative to disconnecting the battery for a long period of time is to hook up a 12v DC power supply.