First Alert Model GCO1 - Manual (Page 4)

UNDERSTANDING THE LIGHT, HORN, AND DISPLAY PATTERNS
Horn Display Condition LED
NORMAL AC POWER LED is Green.
BATTERY BACK-UP POWER LED is Off, flashing Green once every
45 seconds
DURING TESTING LED flashes Red in sync with the
horn, simulating an Alarm condition:
first gas then CO
LOW OR MISSING BATTERY Normal
GAS ALARM CONDITION LED flashes Red in sync with horn
CARBON MONOXIDE ALARM LED flashes Red in sync with horn
MALFUNCTION LED flashing Green 3 times in sync
with 3 rapid chirps
LOW BATTERY SILENCE LED is Green.
PRE-ALARM CONDITION
CO IS PRESENT Normal
Silent All segments of display are turned
On for a short time upon initial
power. Then the battery level icon
is displayed flashing.
First, the horn pattern for gas alarm
(1 beep every second) is issued, and
then the CO alarm horn pattern
(4 beeps, pause, 4 beeps) is issued. During the simulated
gas alarm, “GAS” is
displayed along with
a full alarm level.
During the simulated
CO alarm, “CO” is
displayed along with
a full alarm level.
Several ppm CO
levels are also
displayed and
the alarm level is
shown increasing.
A chirp is issued about every
minute. Battery icon will show
an empty icon.
3 rapid chirps every minute “ERROR” is displayed.
Silent “SILENCE” is displayed.
Repeating 1 beep every second “GAS”, a full level, and “EVACUATE”.
Repeating 4 beeps, pause “CO” alternating
with the ppm
number, a full level,
and “EVACUATE”.
Normal “CO” alternating with the ppm number.
The level will indicate relative CO
exposure level.
Silent All segments
of display are
turned on for
a short time
upon initial
power. Then
the battery level icon is displayed.
4
USING THE PEAK CO MEMORY
The CO Memory Feature lets you check the highest level of CO recorded.
To check CO Memory:
1. Press the Display button until the peak CO level is displayed.
To clear CO Memory:
1. While checking CO memory, press or hold the Display
button until “CLEAR” is displayed.
2. Press or hold the Display button until the CO Memory is
cleared.
NOTE: The highest CO level will be saved, even after a power interruption,
until you clear it. DO NOT clear the CO Memory reading if you plan to call
someone to investigate a CO problem! Clear the CO Memory reading only
after the investigator has checked your home.
SILENCING THE LOW BATTERY WARNING
This Silence Feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours if AC power is present. You can silence the low battery warning
“chirp” two ways:
1. Manually: Press the Test/Silence button on the Alarm cover until you see
the Green LED flicker, acknowledging the button-press.
2. Using Your Remote Control: Standing no further than 12 feet (3.6 meters)
away from the Gas/CO Alarm, aim your IR remote at the Alarm and press
the CHANNEL or VOLUME button for at least 3-5 seconds.
The display will flash “SILENCE” for 8 hours while the low battery warning
“chirp” silence feature is activated. After 8 hours, the low battery “chirp” will
resume. The Alarm will continue to operate as long as AC power is supplied.
However, replace the battery as soon as possible, to maintain protection in
event of a power outage.