Saturday, August 13, 2011
Chirping Universal Security INSTRUMENTS USI-5204 AC/DC Ionization Smoke and Fire Alarm with SILENCER, Battery Back-Up
Image via Wikipedia
The video shows how to take a part USI smoke detector when it is chirping. First check to see that the detector has 120 volt. The smoke detectors green light will be lit. It has 120 volt and that was not why it was chirping.
Make sure that the detector is not painted. This is very important and printed on every smoke detector. I don't think painting a smoke detector will cause it to chirp but it can prevent the alarm from sounding in a fire.
On the USI electric Inc 5204 AC/DC detector the battery backup comes out from the side in a tray. You need to see if the battery has power. A bad battery will cause chirping. That is not the problem this unit needs to be replaced.
To remove the detector you twist to the right. It will drop down from the ceiling. To disconnect the detector from the 120 volts of power and the interconnect you need to pinch the White, Yellow and Black wires together. This will release the wiring harness.
Check the age of the detector. Ever smoke detector has a manufacturer date (MFG date) stamped on the underside. Smoke detectors need to be replaced 10 years after the date of installation. If you do not know the date when the smoke detector was installed; use the stamped MFG date on the bottom.