2. Alarm
The alarm response time of the unit complies with EN 50291. The alarm will not stop
until the CO concentration is lower than 40 PPM. In clean air, the alarm will terminate
automatically after 6 minutes, or you can press and hold the TEST button for 1 to 3 seconds
to cancel the alarm.
IMPORTANT: When you hear successive beeps, this indicates that there is a high
concentration of CO and you and anyone else inside the same building should leave the
site at once and seek assistance.
3. Low CO concentration warning
Low levels of carbon monoxide can often occur in everyday scenarios. For example, cigarette
smoking, burning candles and gas-burning appliances can produce low concentrations of CO.
Although it may do no harm, prolonged exposure to low levels of CO can impair the health of
vulnerable groups such as children, pregnant women, the elderly or recovering patients. This
warning is to help these people avoid prolonged exposure to low levels of CO. It does not
indicate immediate danger, so please do not panic.
When the CO concentration is greater than 30PPM for a duration of more than 60 minutes, or
when the CO concentration is greater than 40PPM for a duration of more than 40 minutes, the
low CO concentration warning will be triggered.
The low CO concentration warning will not stop until the CO concentration is less than 25 PPM.
IMPORTANT: If you hear 4 slower beeps every 3 to 5 minutes instead of a continuous alarm
sound, this indicates that the low CO concentration warning has been triggered. If you hear a
continuous alarm sound at short intervals, this indicates that the alarm has been triggered and
you should leave the scene immediately.
4. Testing
Test the CO alarm at least once a week by pressing the TEST button. This is to make sure the
sensor, buzzer and indicator lights are operating properly.
To conduct a test, press the TEST button. The Power, Fault and Alarm indicators will flash at
the same time. If the detector is working properly, one cycle of the alarm will be made. If there
is a malfunction, the fault warning will be issued.
To perform the test again, wait at least 5 seconds before continuing. The LCD display shows
“---“ when testing is in progress.
IMPORTANT: Please test the product at least once a week to ensure the unit is working
properly.
5. Silencing the alarm
When the alarm is going off and the CO concentration is less than 200 PPM, press and hold
the TEST button to silence the alarm. The buzzer will stop beeping, but the Alarm indicator will
continue to flash.
The alarm will only be silenced for a maximum of 10 minutes. The silence duration decreases
at higher CO concentrations . The alarm will be reset automatically once the silence period
has ended. You can also reset the alarm by pressing and holding the TEST button for 1 to 3
seconds. If the CO disperses, the alarm will be reset automatically.
Make sure that any danger has passed before resetting the alarm.
When the alarm is going off, press and hold the TEST button for 3 to 5 seconds until you see
the Alarm indicator flashing with no beeps. This indicates that the alarm is silenced. If you
still hear beeps, the CO concentration may be more than 200 PPM. In this case, you cannot
silence the alarm.
To restore the alarm, press and hold the TEST button until you hear beeps.
c) Fault warning
1. Sensor fault warning
If there is a fault in the sensor or circuit, a fault warning will be issued within 3 minutes. The
Fault warning will be issued at least once every minute until the fault has been eliminated.
When the fault warning is issued, there may be an open circuit or short circuit in the sensor, or
there may be electronic damage.
Volatile gas such as ethyl alcohol may affect the sensor and cause a temporary fault. In this
case, please replace the product with a new one. Then power off the damaged unit and place
it in clean air for 24 hours.
If the issue persists after the unit has been placed in clean air for 24 hours, the damage might
be permanent. In such cases, discontinue use immediately. Do not repair the unit yourself or
send it to a service point that is not authorised by the manufacturer.
WARNING: When the alarm is permanently damaged, discontinue use immediately. Do not
repair the unit yourself or send to a service point that is not authorised by the manufacturer.
2. Low battery warning
When the detector is working normally, the battery capacity is checked every minute. When the
voltage is less than 3.6 V, a low battery warning will be issued.
When the low battery warning is issued, this indicates that the batteries can only provide
a maximum of one month’s use. Please replace the AA LR6 batteries as soon as possible after
the low battery warning appears.
IMPORTANT: When you hear one beep every minute and “D” appears on the LCD display,
replace the AA LR6 batteries immediately. Otherwise, the detector may not work properly and
may fail to detect life-threatening CO.
d) Service life and end-of-life warning
1. Service life
This product has a service life of 10 years. After being powered on, the product timer will start
automatically. After 10 years, the unit will issue an end-of-life warning. You must replace the
product when this warning is given.
2. End-of-life warning
The end-of-life warning is issued at least once every minute.
If the detector is powered on or off frequently, a timing error may occur. Do not power the unit
on or off frequently. Regularly check the product’s manufacture date to check whether it has
expired.
IMPORTANT: Three quick beeps at intervals indicate that the product has reached the end of its
lifespan. When this occurs, replace the product with a new one immediately.
e) Installation
1. Installation locations
Install the unit in bedrooms and living areas. You can also install it in places which may be
susceptible to CO leakage. To make sure people can hear the alarm from all sleeping areas,
we suggest you install this product on each level of your home.
To avoid causing damage to the product, to prevent false alarms and to ensure optimal
performance, do not install the unit in the following places:
• Do not install the unit in enclosed spaces (such as in a kitchen cabinet or behind a curtain).
• Do not install the unit in obstructive places (such as behind furniture).
•
Do not install the unit on the floor or in water channels.
• Do not install near doors and windows.
• Do not install near fans or air conditioners.
•
Do not install near vents or flues.
• Do not install in areas where the temperature can easily decrease to -10 °C or exceed
+40 °C, unless you especially need to install the unit in these conditions.
• Do not install in areas where there is a lot of soot and dust which will block up the sensor.
• Do not install in areas that are too damp.
• Do not install near kitchen or cooking equipment.
2. Installation instructions
Install the unit in a location where it is easy for the user to test and operate. For wall mounting,
the unit should be installed at a height of more than 1.5 m. The unit should be at least 0.3 m
from the ceiling. It is also best practice to install the unit 1.5 m away from wall corners and large
items of furniture.
Alarm installation
a. Take out the mounting plate and line it up with the intended position on the wall. Mark the
holes with a pencil and make two holes (6 mm diameter, 40 mm depth) on the marked spots.
b. Insert the two plastic anchors into the holes and secure the mounting plate to the wall with
the screws.
c. After making sure the mounting plate is secured to the wall, power on the unit and test
the alarm. If the test result is normal, slide the alarm down over the mounting plate until it
snaps into place.
3. Notes for installation
• The unit cannot be snapped into place until the batteries have been installed correctly. To
prevent damage, do not force the unit onto the mounting plate.
• If you install the alarm in a garage, do not install the alarm near the exhaust of motor
vehicles, as the high concentration of CO may cause the unit to malfunction.
WARNING: In order to ensure the product is correctly installed and used, it should be installed
according to this user manual or by qualified professional personnel.
f) Maintenance
1. Effect of other gases on the product
The following gases may cause false alarms or damage the sensor:
Methane, propane, isobutane, ethylene, ethanol, alcohol, isopropanol, benzene, toluene, ethyl
acetate, hydrogen, hydrogen sulphide, sulphur dioxide, and almost all aerosol sprays, alcohol,
paint, thinner, solvent, binder, hair spray, aftershave, perfume, car exhaust fumes (cold start)
and some cleaning detergents.
When the product is exposed to the gases mentioned above, it may issue false alarms or
be damaged permanently. If the alarm is activated and you can smell irritating gas, this may
indicate a false alarm, as CO is colourless and odourless. Place the product in a clean air
environment, and if the alarm is still going off 30 minutes, this indicates that the product has
been damaged. In this event, place the powered-off unit in a clean air environment for an
extended period. If the product’s performance does not improve within 24 hours, the sensor
has been damaged and should not be used.
IMPORTANT: If the product is damaged by exposure to other gases, place the powered-off unit
in a clean air environment. If the product’s performance does not improve within 24 hours, the
unit should not be used.
2. Cleaning and maintenance
The product must be kept clean to ensure optimal performance and prevent damage. Clean
and test the unit once a month in accordance with the following steps:
a. Remove dust with a vacuum cleaner.
b. Rub the surface with a wet soft cloth that has been wrung out.
c. Press the TEST button and make sure the detector is working properly, then reinstall and
use.
Do not clean the alarm with chemicals such as alcohol, petrol, cleanser, etc., as these may
cause damage to the unit.
IMPORTANT: Clean the product once a month. Do not clean the unit with chemical cleanser.
