How to troubleshoot Comm Fail when intrusion alarm panels communicate over phone lines.
What would cause a control panel to go into Comm Trouble or Comm Fail?
How to determine which wireless interface to use with the EN1224-ON keyfob.
How to determine which control panels the EN1224-ON keyfob can be used with.
Is the EN1224-ON compatible with D7212 panel types (G, GV2, GV3 or GV4)?
How to work with duress passcodes and avoid ‘Passcode in Use’ errors.
Why does ‘Passcode in Use’ display when adding a new code and how to prevent the message from displaying.
Issue
The keypad displays the Access Module Door Point is in trouble. Diagnostics displays the point as missing.
Solution
T+ (Tamper Input) of the Access Module is an unsupervised input that is normal when open. Upon a short, the Door Point number assigned to the supervised zone of the Access Module is reported as a MISSING PT###.
Issue
What voltage and current is the phone line monitor measuring to sense trouble on the phone line on the D7212B/D9112B panels?
Solution
The phone line monitor senses trouble when the voltage on the line falls below 4.5 to 7.5 VDC, or in the off-hook condition when the current is 8 to 13mA.
