4.2. Main Functions
a) Alarm Testing: The smoke detector can work
properly after connecting power supply, and
the indicator flashes about every 45 seconds.
Press the test button, the buzzer generates
alarming sound and the indicator flashes
quickly. C+ and C- of a smoke detector is
closed. Release the button, the smoke
detector
resumes
to
normal
working
condition. C+ and C- of a smoke detector is
opened.
b) Alarming: When smoke density reaches a
certain level around the smoke detector, the
LED will flash quickly, and the buzzer
generate alarming sound. C+ and C- of a
smoke detector is closed. When the smoke
disappears, the smoke detector can resume
to normal automatically. Then C+ and C- of a
smoke detector is opened.
c) Silence: when alarm is given by a smoke
detector, the alarming sound can be
silenced by pressing the button. The smoke
detector will resume to normal after about 55
seconds later.
d) Indication of low battery: When the battery
voltage is lower than 2.7V, the smoke
detector
will give short “chirp” sound with
visual indication and the buzzer alarms
about every 45 seconds. These shows the
battery is low and should be replaced by
new one.
e) Indication of low sensitivity: When sensitivity
of the sensing chamber is low, the detector
will give short “chirp” sound between two
flashes of the indicator.
f)
Sensitivity drift compensation: the dust can
build up in the sensing chamber as time
goes by, so the feature of sensitivity drift
compensation can delay the date of clearing
taking accumulative dust into consideration.
g) Indicating dirty chamber: When chamber is
dirty, the detector
will give short “chirp”
sound between two flashes of the indicator.
h) Switch output terminals:
This smoke detector provides a switch
output isolating photoelectric (normally
open). The capacity: external volatge can be
up to 30V and the current can be up to
60mA. It is used to control associated
devices.
C+ of a smoke detector can connect to
anode of the power supply and C- of a
smoke detector to cathode of the power
supply.
C+ and C- of a detector is opened when
polling, and closed when alarming.
4.3. Limitations
The smoke detector will not work without
power.
This smoke detector is powered by
batteries; it will not work without batteries, with
dead batteries or is the batteries are not installed
properly.
The smoke detector may not sense fire that
starts where smoke cannot reach it,
such as in
chimneys, in walls, on roofs, or on the other side
of closed doors.
The smoke detector may also not sense fire
on another level of a residence building.
For
example, a second-floor smoke detector may not
sense a fire on first floor or in basement.
Therefore, smoke detectors should be placed on
every level of a residence or building.
The buzzer in the smoke detector meets or
exceeds audibility requirements of relative
standards.
5. Troubleshooting
5.1. A smoke detector gives alarm on power
up.
Make sure there is not too much smoke,
dust or vapor in the room.
The smoke detector may be in an unstable
state. Please press the test button for 3
seconds or so then release it to resume the
smoke detector back to proper operation.
If two cases above are excluded, the
smoke detector still doesn
’t work properly.
Please return the smoke detector for repair
(see 7. Return a Smoke detector) .
5.2. A smoke detector
doesn’t give alarm
when the button is pressed.
Check battery if it is low voltage. Replace it
with a new one.
It is is not the case above, return the smoke
detector for repair.
6. Maintenance
1. The smoke detector should be tested after
installed and after every one week. For any
problems, please contact our local distributor or
agent for technical support.
2. In normal environment, the battery can last for
about three years. But adverse circumstance like
high temperature and humidity may shorten its
life. Please replace battery when the smoke
detector alarms low battery. Please use two AA
1.5V LR6 batteries.
Note: Please use recommended batteries.
Otherwise the smoke detector may be
damaged.
3. Replacing the battery, as shown in Fig. 4.
Use screwdriver to open the battery cap.
Slightly take the battery out of battery
holder.
Replace two new batteries.
Put the battery cap back.
