BRK electronic CO5120B - Manual (Page 27)

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UNDERSTANDING THE LIGHT AND HORN PATTERNS (AC POWER OFF)
When AC power is Off, and CO alarm is operating on battery back-up...
Condition LED (Red Light) Horn
BATTERY BACK-UP
POWER UP LED flashes ON once,
then flashes once per minute Horn “chirps” once.
DURING TESTING LED flashes once every second
during the 10-second test cycle Horn pattern: 4 beeps,
pause, 4 beeps, pause.
MISSING OR DEAD
BATTERY (DC back-
up disabled) LED is OFF Horn is silent.
WARNING: When the AC power is Off, if the battery is dead or missing, the CO alarm cannot work.
LOW BATTERY LED flashes once per minute Horn “chirps” once a minute.
ALARM CONDITION
Single CO Alarm
(not interconnected) LED flashes rapidly,
once every second Horn pattern: 4 beeps,
pause, 4 beeps, pause,
repeating.
ALARM CONDITION
Interconnected
Series of Alarms LED flashes rapidly on the unit
that triggered the alarm. LEDs
on the other alarms in the series
will not flash. Horn pattern: 4 beeps,
pause, 4 beeps, pause
repeating, on all CO
alarms.
IN SILENCE MODE LED flashes rapidly,
once every second Horn stays quiet for 4 minutes.
“LATCHING” ALARM
INDICATOR LED flashes
once every 5 seconds Horn stays quiet.
MALFUNCTION LED flashes 3 times
synchronized with 3 rapid chirps Horn sounds 3 rapid chirps
(“chirp-chirp-chirp”) every
minute.