20
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.
11. Recognizing Nuisance Alarms
SMOKE NUISANCE
HUSH
®
:  If you know why the alarm is sounding, and you can verify that it is not a life threatening 
situation, you can push the button on the initiating unit (green LED flashing every second) to silence the 
alarm for 8-10 minutes. If the smoke is not too dense, that unit, and all interconnected units will silence. 
After the Hush
®
 period, the smoke alarm will automatically reset and sound the alarm if particles of 
combustion are still present. You can use Hush
®
 repeatedly until the air has been cleared of the condition 
causing the alarm.
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