7. NUISANCE ALARMS
This Smoke alarm is designed to minimize nuisance alarms. Cigarette smoke will 
not normally cause the unit to alarm, unless the smoke is blown directly into the 
alarm. Combustion particles from cooking may set off the alarm if it is located 
too close to a cooking appliance. Large quantities of combustible particles are 
generated from spills or when broiling. Using the fan on a range hood which 
vents to the outside (non-recirculating type) will also help remove these combus-
tible products from the kitchen.
If the alarm does sound the smoke alarm pattern of 3 long beeps, check for fires 
first. If a fire is discovered, get out and call the fire department. If no fire is  
present, check to see if one of the reasons listed in “Locations to avoid” may 
have caused the alarm. 
SMART HUSH
TM 
 CONTROL: The SMART HUSH
TM
 control that is extremely 
useful in a kitchen area or other area prone to nuisance alarms. The SMART 
HUSH
TM
 feature has the capability of temporarily desensitizing the alarm circuit 
for approximately 10 minutes. 
This feature is to be used only when a known alarm condition, such as smoke 
from cooking, activates the alarm. The smoke alarm is desensitized by pushing 
the Test/Hush button on the smoke alarm cover. If the smoke is not too dense, 
the alarm will silence immediately and the red LED blinks every 10 seconds. This 
indicates that the alarm is in a temporarily desensitized condition. 
The smoke alarm will automatically reset after approximately 10 minutes and 
sound the alarm if particles of combustion are still present. 
The SMART HUSH
TM
 feature can be used repeatedly until the air has been 
cleared of the condition causing the alarm. Pushing the Test/Hush button on the 
alarm will end the temporarily desensitized period. 
If the smoke is not too dense, after ten minutes the alarm will return to normal 
operation.
NOTE: Dense smoke will override the SMART HUSH
TM
 feature and  
sound a continuous alarm. 
CAUTION: Before using the alarm SMART HUSH
TM
 feature, identify  
the source of the smoke and be certain safe conditions exist.
8. BATTERY
BATTERY ACTIVATION AND DEACTIVATION
NOTE: One Lithium-Ion battery, permanently sealed inside the alarm, powers this 
unit; no battery installation or replacement is necessary for the life of the alarm.
IMPORTANT: Constant exposure to high or low humidity may reduce battery life.
 WARNING! DO NOT ATTEMPT TO OPEN THE ALARM  
FOR ANY REASON!
Do not try to repair the smoke alarm yourself. No serviceable parts included.
Low battery: This alarm is equipped with a low battery monitor circuit which 
will cause the alarm to produce a single “chirp” approximately every 60  
seconds and blink the Red LED every 30 seconds, for a minimum of seven  
(7) days should the battery become low. 
If you require further information please contact  
Product Support at 1-800-880-6788 or write us at: Kidde, 1016 Corporate 
Park Drive, Mebane, NC 27302. Our internet address is www.kidde.com.
* End of life hush feature. Silences end of life indication 3 days at a time for  
a maximim of 30 days.
6. Alarm Visual and Audible Indicators
Alarm  
Mode
Visual  
Indications
Audible  
Indications
Smoke or Fire detected 3 blinks synchronized with audible alarm 3 long beeps, repeating
Carbon Monoxide 
detected
4 blinks syncronized with audible alarm 4 quick beeps, repeating
Operational 
Mode
Visual  
Indications
Audible  
Indications Note:
Normal  
Operation
Blink once every 60 
seconds
None LED will flash every 60 seconds for 
10 minutes following power on or 
reset.  After initial 10 minutes,  
LED will flash once every  
10 minutes
Test/Hush  
Button Press
Blink with each alarm 
pattern
Two sets of 3 long 
beeps
Test/Hush button press will initiate 
test sequence
Smoke or CO 
Alarm Hush
Blink once every 10 
seconds
None (smoke alarm 
silenced)
Alarm hush feature silences smoke 
alarm for approx. 10 minutes.
Low Battery Blink once every 30 
seconds
Chirp every 30 
seconds
Replace alarm
Fault Mode Fault code (2-12 
flashes every 30 
seconds)
Chirp every 30 
seconds
Replace alarm
End of Unit 
Life*
2 blinks every 30 
seconds
2 chirps every 30 
seconds
Remove alarm, disable, replace
End of Unit Life 
Hush
None None (End of Life 
chirps silenced)