12 P/N 466-5307
• REV A • ISS 15MAR17 ©2017 United Technologies
Corporation
AMBIENT LIGHT SENSING
In low light ambient conditions, the GREEN LED will reduce in brightness and intensity.
This detector samples the ambient light conditions of its location and, if possible,
determines a Night/Day cycle. A valid Night/Day cycle will delay the conditions that
require that the detector be replaced (Low Battery or end of Unit Life) or Network Error
chirps at night until the next Day cycle begins. Once the unit goes into End of Unit Life
or Network Error, the chirps can only be silenced by pressing the Test/Hush button.
After 7 days of End of Unit Life chirps, the chirps can no longer be silenced by pressing
the Test/Hush button. Low Battery chirps cannot be silenced. See Troubleshooting
Guide.
WARNING: REPLACE DETECTOR AS SOON AS POSSIBLE WHEN AN END
OF UNIT LIFE OR LOW BATTERY MODE.
If the detector cannot determine a valid Night/Day cycle because the detector is located
in either a constantly dark or lighted location, Low Battery, End of Unit Life, and
Network Error chirps will not be inhibited. If the unit is moved to a location that is not
constantly dark or lighted, it will determine a Night/Day cycle because the unit
continuously samples ambient light conditions.
Detector Visual and Audible Indicators
Operational Mode
Visual Indication
Audible
Indication
Action:
Normal Operation
One GREEN LED
blink every 60
seconds.
None
None
Carbon Monoxide
(CO) Alarm
On all alarming
detectors, the
RED LED blinks
per a Temporal
T4 Pattern
Temporal T4
alarm pattern is
alarm pattern is
four quick blinks
repeating every 5
seconds
On the detector
initiating the CO
Alarm only, the
GREEN LED will
blink every
second.
Alarm per
Temporal T4
Pattern
Temporal T4
alarm pattern is
four quick beeps
repeating every 5
seconds.
Carbon Monoxide has been
detected. Follow the
instructions at the beginning of
this User Guide under the
section "What to do when the
alarm sounds, CO alarm
activation"
