About the keypads – ADT Security Services VISTA-15 User Manual
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About the Keypads
(cont'd)
NO AC:
AC power has been cut off. System is operating on backup
battery power.
AC:
AC power is present.
CHIME:
The Chime feature is activated.
BAT:
There is a low-battery condition in a wireless sensor (if
zone number is displayed) or a low system battery (if no
zone number is displayed).
ALARM:
An intrusion has been detected and the system is armed
(also appears during a fire alarm or audible emergency
alarm). The protection zone in alarm is also displayed.
CHECK:
A malfunction has been discovered in the system (at any
time); or an open has been detected in a Fire zone (at any
time); or a fault has been detected in a Day/Night burglary
zone (during a disarmed period). The zone number in
trouble is also displayed.
This message will be displayed if a hardwired zone is
shorted (if the Hardwire Short Detection option is enabled).
Ask your installer for details.
FIRE:
A fire alarm is present. The zone in alarm is also displayed.
CANCELED:
Appears when an alarm occurs and the system is disarmed
before the monitoring station has been notified.