Use and Care Manual
5. OPERATION AND TESTING
OPERATION: The alarm is operating once it is activated and testing is complete. 
The photoelectric smoke sensor monitors the air for the presence of products of 
combustion. When these levels exceed the alarm threshold the alarm will sound, 
and be accompanied by the blinking red LED light, and voice message.
The carbon monoxide (CO) sensor monitors the air for the presence of CO. It 
will alarm when there are high levels of CO present, and when there are low 
levels of CO present over a longer period of time. When a CO condition match-
es either of these situations, the alarm will sound, and be accompanied by the 
blinking red LED light, and voice message.
The CO sensor meets the alarm response time as follows: 
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.
TESTING: Test your alarm by pressing the test button until the unit chirps, then 
release the test button. The unit will then emit three long beeps, "Fire!", three 
long beeps, short pause, four short beeps, "Warning! Carbon Monoxide!", four 
short beeps, pause, one beep. The alarm and voice will sound if the electronic 
circuitry, horn, speaker, and battery are working. If the alarm or voice does not 
sound, the unit must be replaced.
 Warning: Due to the loudness (85 decibels) of the alarm, always 
stand an arm’s length (about 2.5 feet) away from the unit or use ear 
protection when testing.
Weekly testing is required to ensure proper operation. Erratic or low 
volume sound (or no sound) coming from your alarm may indicate a defective 
alarm and it should be returned for service. See deactivation section to deter-
mine how to prepare the unit for shipment or disposal.
 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.
The following table describes the visual and audible alarm conditions the unit 
may encounter and illustrates how the unit will indicate normal standby, alarm 
and error conditions.










