Kidde 21027311 User Manual page 21

Ambient light Sensing
This unit samples the ambient light conditions of the alarm's location and, if possible, determines a Night / Day cycle. A
valid Night / Day cycle will delay unit chirps during the night until the next Day cycle begins.
Chirping
When chirping begins during the next Day cycle, you can temporarily
silence End of Unit Life or Network Error chirps by pressing the Test/
Hush button. Low Battery chirps cannot be silenced.
If a valid Night / Day cycle has not been established because the unit is located in either a constantly dark or lighted
location, the chirps mentioned above will not be delayed at night. Moving the unit to a different location might allow
the unit to determine a valid Night / Day cycle.
WArnIng: rePlACe UnIt AS Soon AS PoSSIble When In end of UnIt lIfe or loW bAttery Mode.
PoSSIble ChIrPIng reASonS
End of Unit Life: will be delayed at night
Network Error: will be delayed at night
Low battery: will be delayed at night
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