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GS819 Manual Rev. C
3.7 CO alarm warning
When the alarm detects a dangerous level of CO, the alarm will emit a loud alarm pattern. The alarm signal pattern is 4 quick beeps
followed by 5 seconds of silence. This cycle repeats as long as a dangerous CO condition exists. The red alarm LED will flash the same
pattern.
This signal will repeated until the alarm resets after dissipation of CO or the alarm signal is manually silenced.
NOTE: Refer to “4. What to do if the alarm sounds” when you hear the sounds of the CO alarm warning.
3.8 CO alarm warning silence
If the alarm is under the CO alarm warning, enable the TEST/SILENCE button, it will come into silence status for 5 minutes, and
ALARM indicator (red LED) still keep flashing.
NOTE: The alarm signal will reenergized within 6 minutes from the time the TEST/SILENCE button is operated if the
concentration of CO surrounding the alarm remains at 45ppm or greater.
3.9 human alarm sounds
If the alarm come into the status of CO alarm warning, the alarm will start in a lower alarm volume (<85dB) for around 10 seconds,
then issuing a normal alarm volume (>85dB). It will avoid people to be scared suddenly by a loudness alarm sound.
3.10 Test the unit
To test the alarm, press and hold TEST/SILENCE button，you should hear alarm sound patterns and with a corresponding ALARM
indicator (red LED) flash. The alarm sound patterns will stop when release TEST/SILENCE button.
The test alarm sound pattern includes: 4 short beeps, 5 seconds pause, repeat the pattern until release TEST/SILENCE button.
NOTE: After the TEST/SILENCE button is enabled, the alarm sounds and the red alarm light flashes. This does not indicate that
CO is present.
NOTE: Test the unit weekly! If at any time your unit does not perform as described, replace it immediately.
NOTE: The function of human alarm sounds will enable for button test. Please press and hold test button more than 10 second,
the alarm will issuing a normal alarm volume(>85dB).
4. What to do if the alarm sounds
WARNING! –Actuation of your CO alarm indicates the presence of Carbon Monoxide (CO) which can KILL YOU.
WARNING! –Action of this device indicates the presence of dangerous levels of CO! CO can be fatal! If the alarm sounds:
1. Operate the TEST/SILENCE button.
2. Shut down furnaces and gas supply.
3. Immediately move to fresh air outdoor or by an open door/window. Do a head count to check that all persons are accounted. Do
not reenter the premises nor move away from the open door/window until the emergency services responders have arrived, the
premises have been aired out, and your alarm remains in its normal condition.
4. After following steps 1-3 , if your 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 manufacturer’s instructions or contact the manufacturer directly for
more information about CO safety and this equipment. Make sure that motor vehicles are not or have not been operating in an
attached garage or adjacent to the residence.
5. Battery installation/replacement
Twice chirps with corresponding FAULT indicator (yellow LED) flashing twice every 30 seconds indicates that the battery is low battery,
