I inherited a GE Caddx NX4 system not operational. Replaced the battery and installed new contacts on all doors. Everything was in order and looked fine. Then I got a code from the previous owner but as soon as I put the code in, the system armed and alarm went off.
Now system is permanently armed, all the zones are flashing plus the service light is also flashing. The keypad does not respond. No code I try and submit responds. Tried to disconnect the battery as well as the power for 48 hours thinking it would clear the memory. Does not work.
When I link the power and/or the battery the alarm sounds and all the above remain flashing.
I disconnected the wires from the keypad in total. When reconnecting the status quo remains the same.
How do I do a factory reset? How do I clear the memory and start all over again. The keypad is a NX-124G*