Ademco 4180/4180EC Trouble Display

C AC Power Trouble

F Telephone Line Trouble (requires an external module)

Key 5 LED ON System is dialing Monitronics

Key 5 LED Flashing Successful communication with Monitronics

Note: This will stop after 30 seconds

Key 8 LED ON Failure to Communicate

Troubles Zone Trouble = Trouble light ON + Zone light ON

POWER Light OFF = AC Failure