Table 1 - Detector Status LED & Sounder Operating Modes
4.2 DETECTOR DIRTY FEATURE
When the detector has been contaminated and may no longer be within the
marked sensitivity limits the detector will chirp every 48 seconds and flash the
YELLOW LED once every 8 seconds. Refer to Section 10.1 for cleaning your
detector.
4.3 DETECTOR END OF LIFE
When the detector has reached the end of its 10 year operating life it will chirp
every 48 seconds and flash the YELLOW LED 5 times every 12 seconds. The
detector must be replaced.
4.4 LOW BATTERY DETECTION
The detector regularly checks the battery condition. If a low battery is detected the
detector will chirp every 48 seconds and flash the YELLOW LED once every 8
seconds. The chirp may be silenced for 12 hours by pressing either button (See
Section 2.1 Figure 1). The batteries must be replaced using 2 Panasonic CR123A
batteries or 2 Energizer EL123AP batteries.