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4. Understanding your CO alarm
4.1 Start up
After connecting the battery, all three LEDs light up briefly and the CO alarm confirms start-
up with a beep. After power on, the green LED flashes once per second within 60 seconds,
this is preheated state, 60 seconds later the green LED flashing every 40 seconds indicates
the unit is functioning properly.
4.2 Normal operation
The POWER indicator (green LED) flashing every 40 seconds.
4.3 Fault warning
If the unit beeps twice every 8 seconds and the FAULT indicator (yellow LED) flashes. It
indicates the CO alarm is in malfunction condition. That means your CO alarm has no
detecting function and will not respond to CO. Please contact us immediately for more
services.
4.4 Fault warning silence
When the alarm is under the fault warning, press the TEST/SILENCE button, it will come
into silence status for about 9 hours, while the FAULT indicator (yellow LED) keeps on
flashing.
4.5 Low battery voltage warning
If the alarm beeps once every 40 seconds, with FAULT indictor (yellow LED) will be flash. It
indicates the battery is low.
NOTE:
- You need to replace the batteries immediately when the alarm enters this status.
- The alarm will not protect against the risk of carbon monoxide poisoning when the battery
is empty.
- Refer to “5. Battery installation/replacement” when you hear the sound of a low battery
voltage warning.
4.6 Low battery voltage warning silence
When the alarm is under the low battery warning, pressing the TEST/SILENCE button, it will
come into silence status for about 9 hours, and FAULT indicator (yellow LED) will keep on
flashing.
NOTE:
- When alarm under the low battery warning, please replace the battery in time to ensure a
normal operation.
4.7 End of life warning
If the alarm beeps 3 times every 40 seconds with FAULT indicator (yellow LED) flash. It
indicates end of life of the CO alarm. You need to immediately replace the CO alarm.
4.8 End of life warning silence
When the alarm is under the end of life warning, pressing the TEST/SILENCE button, it will
come into silence status for about 9 hours, and FAULT indicator (yellow LED) still keep
flashing.
