Weeks ago, the trouble light was on. I pressed *2 and saw zone 1 was on, which means low battery. I bought a same model battery from RadioShack (12V, 5Ah). After I replaced the battery, the trouble light went out. Then I wanted to reset the panel since it's opened (coz I never knew the master code). I power off AC and battery, shorted the RESET EPROM pin, power on. Master code was reset to 1234. I can program each function without any problem. But the problem is: the trouble light came back! It's zone 1 (low battery). I used multimeter to test the battery and the fuse. They all good. I unpluged the AC while the battery was connected, I heard siren, which means the system was getting power from the battery (otherwise, there would be no siren). I also read from the forum, it might be the system clock. I program the system clock with *6+master code+1+4digit time. The trouble light still won't go away. It's always zone 1 (low battery). I thought about the possibility that the main board was broken. But it's unlikely, since every feature seems good. Except for the trouble light is on. I can live with it. But I'm really curious what would cause the trouble light 1 on. Thanks! Michael

I just completed installing a Ademco Vista 15 wireless system. Upon powering up the system, I heard the keypad send out an chirp, and displayed this message: "OPEN Ckt". From what I could find in the manual that looked similar to the message, it says the keypad isn't receiving any signal from the control board, thus reports it as an "open circuit". I rechecked my connections, and everything is getting electricity. Does this message mean my board is faulty?