17
CO ALARM SENSOR RESPONSE TIMES
At 70 PPM, the unit must alarm within 60-240 minutes.
At 150 PPM, the unit must alarm within 10-50 minutes.
At 400 PPM, the unit must alarm within 4-15 minutes.
10. Operation And Testing
This model meets the latest residential smoke 
alarm standards, which includes enhanced 
resistance to nuisance alarms from cooking.
Operation
The alarm is operating once it is activated and testing is complete (see “TESTING” below). When 
products of combustion (smoke or CO) are sensed, the unit sounds a loud alarm with voice messages. 
See Sections 1 and 2 for alarm signal descriptions.  In high levels of CO, the unit will go into alarm in a 
shorter period of time than at low levels of CO.
Testing
 WARNING: Do not attempt to test this unit with retail “canned smoke” products. Those products 
are intended for use by trained professionals and produce inconsistent results when misused.  
Over-application of canned smoke can permanently damage the alarm.
Self-Testing
This model is equipped with internal, self-testing components that are always checking to ensure the 
device is operating as expected. (Weekly manual testing is still required. See below.)
Manual Testing
NOTE: When pushing the Test button, use only your finger or thumb. Using any other instrument(s) 
(such as a broom handle) is strictly prohibited, as it may damage the alarm.
Test your alarm weekly by pressing and releasing the button quickly. A quick beep will confirm  
the button has been pushed followed by the test sequence. See Other Alarm Visual and Audible 
Indicators table. The alarm and voice will sound if the electronic circuitry, horn, speaker, and batteries 
are working. If the alarm or voice does not sound, or gives erratic or low volume sound, the unit must 
be replaced. See Permanently Disable Alarm / Discharge Battery section to determine how to prepare 
the unit for shipment or disposal.
 WARNING:  DUE TO THE LOUDNESS OF THE ALARM, ALWAYS STAND ABOUT 2.5 FEET 
AWAY FROM THE UNIT OR USE EAR PROTECTION WHEN TESTING.
 WARNING:  DO NOT USE AN OPEN FLAME TO TEST YOUR ALARM, YOU COULD DAMAGE 
THE ALARM OR IGNITE COMBUSTIBLE MATERIALS AND START A STRUCTURE FIRE.
Chirping
When End of Unit Life or Low Battery chirping begins, you can temporarily silence these chirps 
by pressing the button. Other fault/error chirps cannot be silenced. Take appropriate action as 
described in the Troubleshooting Guide. 
 WARNING:  REPLACE UNIT AS SOON AS POSSIBLE WHEN IN END OF UNIT LIFE OR LOW 
BATTERY MODE. SEVEN 7 DAYS AFTER END OF UNIT LIFE BEGINS, THE NOTIFICATIONS  
CANNOT BE SILENCED, AND SMOKE AND CO DETECTION CANNOT BE GUARANTEED.  
REPLACE IMMEDIATELY!