How Your Smoke/Co Alarm Works; Smoke Alarm Cover Overview; Understanding The Light And Horn Patterns; If Your Smoke/Co Alarm Sounds - First Alert SC9120B User Manual

HOW YOUR SMOKE/CO ALARM WORKS

THE COVER OF YOUR SMOKE/CO ALARM
UNDERSTANDING THE LIGHT
AND HORN PATTERNS
Condition LED (Red or Green
Lights)
POWER UP Green LED
flashes ON
once, then
shines continuously
DURING TESTING Smoke & CO
Red LEDs flash
once every
second during
their respective
repetitive horn
patterns
LOW OR MISSING Green LED
BATTERY flashes
(with horn)
ALARM CONDITION Smoke or CO
Interconnected Series Red LED
of Smoke/CO Alarms flashes rapidly
on the unit that
triggered the alarm.
LEDs on the
other alarms in
an interconnected
series will not flash.
IN ALARM SILENCE Red Smoke or CO
MODE LED flashes
once every
second on
initiating unit
"LATCHING" ALARM Red Smoke
INDICATOR and/or CO
LED flashes
once every 5 seconds
MALFUNCTION Green LED flashes 3
times synchro-
nized with 3
rapid chirps

IF YOUR SMOKE/CO ALARM SOUNDS

WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide CO Light:
(CO) Flashing RED
Horn: 4 beeps,
pause, 4 beeps,
pause
Smoke Smoke Light:
Flashing RED
Horn: 3 beeps,
pause, 3 beeps,
pause
1. Test/Silence Button: Press
and hold to activate test,
or to silence the alarm.
2. POWER Light (GREEN)/
SMOKE ALARM Light (RED)
3. CO ALARM Light (RED)
4. Battery Drawer
5. (Behind the Cover) Alarm
Horn: 85dB audible alarm
for test, alarm, and unit
malfunction warning.
Horn
Horn remains silent
Horn pattern:
(Smoke) 3 beeps,
pause, 3 beeps,
pause;
(CO) 4 beeps, pause,
4 beeps, pause
Horn "chirps"
about once a
minute
Horn pattern:
(CO) 4 beeps,
pause, 4 beeps,
pause repeating
on all CO Alarms and
"Smart Interconnect"
Alarms;
(Smoke) 3 beeps,
pause, 3 beeps,
pause repeating on all
Smoke, Heat, and
"Smart Interconnect"
Alarms
Horn remains silent:
CO for 4 minutes;
Smoke for up
to 15 minutes.
Horn will sound
if Smoke or CO
levels increase.
Horn remains silent
Horn sounds 3
consecutive
rapid chirps
every minute
WHAT TO DO IF CARBON MONOXIDE IS DETECTED
"ALARM-MOVE TO FRESH AIR"
If you hear the alarm horn sound 4 beeps, pause,
4 beeps, pause, and the RED CO light is flashing,
move everyone to a source of fresh air.
Actuation of your CO Alarm indicates the presence of carbon
monoxide (CO) which can kill you. In other words, when your CO
Alarm sounds, you must not ignore it!
IF THE CO ALARM SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
_____________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or
window. Do a head count to check that all persons are accounted
for. Do not re-enter the premises, or move away from the open door
or window until the emergency services responder has arrived, the
premises have been aired out, and your Smoke/CO Alarm remains
in its normal condition.
4. After following steps 1-3, if your Smoke/CO Alarm reactivates within
a 24-hour period, repeat steps 1-3 and call a qualified appliance
technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of
this equipment. If problems are identified during this inspection
have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the
manufacturers' instructions, or contact the manufacturers directly,
for more information about CO safety and this equipment. Make
sure that motor vehicles are not, and have not, been operating in
an attached garage or adjacent to the residence. Write down the
number of a qualified appliance technician here:
_____________________________________________________________

WHAT TO DO IF SMOKE IS DETECTED

If you hear the alarm horn sound 3 beeps, pause, 3 beeps,
pause and the RED SMOKE light is flashing, smoke has
been detected. Evacuate everyone from the building.
• If the unit alarms and you are not testing the unit, it is warning
you of a potentially dangerous situation that requires your
immediate attention. NEVER ignore any alarm. Ignoring the
alarm may result in injury or death.
• Never disconnect the AC power to quiet an unwanted alarm.
Disconnecting the power disables the Alarm so it cannot
sense smoke. This will remove your protection. Instead, open
a window or fan the smoke away from the unit. The Alarm will
reset automatically.
• If the unit alarms get everyone out of the house immediately.
• ELECTRICAL SHOCK HAZARD: Attempting to disconnect the
power connector from the unit when the power is on may result
in electrical shock, serious injury or death.
When an interconnected system of AC powered units is in alarm,
the alarm indicator light on the unit(s) that initiated the alarm will blink
rapidly. It will remain OFF on any remaining units.
If the unit alarms, get everyone out of the dwelling immediately.
If the unit alarms and you are certain that the source of smoke is not a
fire—cooking smoke or an extremely dusty furnace, for example—open a
nearby window or door and fan the smoke away from the unit. Use the
Silence Feature to silence the Alarm. This will silence the alarm, and
once the smoke clears the unit will reset itself automatically.
6