3
Sensitivity test
To test the smoke sensor sensitivity, do the following:
1.
Press and hold the smoke sensor test button for two seconds,
then release it. The smoke sensor transmits a test signal, and
then does a self-test that causes the LED to flash one to nine
times.
2.
Count the number of LED flashes, then use
Table 1
to deter-
mine if any action is needed.
Fault conditions
Correct fault conditions as soon as possible. The smoke sensor
indicates a fault condition in the following ways:
• The LED stops working (no flashing or turning on) if the
smoke sensor sensitivity is not within the normal range, or if
an unserviceable hardware fault is detected.
• The smoke sensor stops transmitting supervisory signals if
the smoke sensor has an unserviceable hardware fault or is
not sensitive enough, causing the panel to indicate the
smoke sensor is in a supervisory condition. However, the
smoke sensor can still transmit alarm signals.
• The smoke sensor transmits a trouble (CleanMe) signal
when the smoke sensor is too sensitive. The panel
announces “Sensor
number
,
name
, open or fire warning”.
Battery replacement
When the battery voltage gets low, the smoke sensor transmits a
low battery signal to the panel. The panel activates trouble beeps
through system sirens and identifies the smoke sensor with the
low battery. If batteries are not replaced within seven days, the
smoke sensor’s built-in sounder emits a short beep of chirp every
45 seconds. You can silence smoke sensor chirps for 24 hours by
pressing the smoke sensor’s test button. Replace low batteries as
soon as possible. Use only 3-volt lithium batteries listed in
Spec-
ifications
on page 4.
To replace the batteries, do the following:
1.
Remove the smoke sensor from the mounting base.
2.
Slide the battery compartment cover away from the smoke
sensor to unsnap it and lift it off (
Figure 1
on page 1).
3.
Remove the batteries and dispose of them according to
battery directive instructions and/or instructions from local
government authorities.
4.
Observing correct polarity, insert two new batteries into the
battery compartment and replace the battery cover.
5.
Attach the smoke sensor to the mounting base and test the
system.
Maintenance
Clean the smoke sensor cover with a dry or damp (water) cloth as
needed to keep it free from dust and dirt. When necessary, clean
the smoke sensor interior and replace the optical chamber (part
211).
To replace the optical chamber, do the following:
1.
Contact the central monitoring station and inform them that
you will be doing maintenance to the system.
2.
Remove the smoke sensor from the mounting base and
remove the batteries.
3.
Slide a flat-bladed screwdriver in the slot on the smoke
sensor cap and gently push the handle down to pry off the
smoke sensor cap (
Figure 3
).
Figure 3. Removing the smoke sensor cap
4.
Squeeze the optical chamber and pull it up and away from
the optical base and discard (
Figure 4
).
Figure 4. Optical chamber
5.
Blow out or use a soft-bristled brush to remove all dust and
dirt from the optical base.
6.
Line up the new optical chamber with the optical base and
snap both side of the optical chamber into place.
7.
To replace the smoke sensor cap, line up the cap with the
smoke sensor, insert the cap, and turn the cap approximately
15 degrees. It should snap firmly into place.
8.
Observing proper polarity, install batteries and replace the
battery cover.
9.
Attach the smoke sensor to the mounting base and test
smoke sensor sensitivity.
Table 1.
Sensitivity test
Flashes
Indication/action
1
Unserviceable hardware fault detected. Reset the unit by
removing and replacing the batteries and retest. If error
persists, replace the unit.
2 to 3
Unit is becoming insensitive. Clean the unit. Reset the unit
by removing and replacing the batteries and retest. If error
persists, replace the unit.
4 to 7
Unit is within normal range. No action needed.
8 to 9
Unit is becoming too sensitive. Verify that the smoke
chamber is snapped down securely. Clean the unit. Replace
the optical chamber (part 211)
Smoke sensor cap
Optical chamber
Smoke sensor
Optical base
