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If the Alarm is exposed to 150 ppm of CO, it must alarm between 10 and 50 minutes. The UL2034 Required Alarm Points are: If the Alarm is exposed to 400 ppm of CO, it must alarm between 4 and 15 minutes. Blinking red on a hardwired smoke detector usually means the loss of utility power to the fire alarm and or it is time to … Kidde hardwired smoke alarm red light flashing WebCO alarm levels are measured in parts per million (ppm) of CO over time (in minutes). Kidde Smoke Alarm red light flashing - YouTube Smoke Detector Flashing (Green, Red, Yellow, Blue) Light WebA blinking red fire alarm is a sign that it is time to change the battery. Kidde AC Hardwired Interconnect Smoke Alarm with Safety Light I12080. Kidde Smoke Detector, Hardwired Smoke Alarm with Battery Backup, Front-Load Battery Door, Test-Silence Button, White.Kidde hardwired smoke alarm red light flashing Web4