Problem Probable Cause Solution
Battery has been charging for
6 hours. Charging indicator
on LCD shows the battery is
still charging
Battery is trickle charging
Verify the charger is properly
connected to the AC outlet.
Battery indicator does not
display when charging
Battery is depleted below
normal levels
Replace the battery.
Battery does not charge Replace the battery.
Sensor fails to zero during
startup self-test
Change the sensor.
The detector does not
activate.
Depleted battery. Replace the battery.
Damaged detector. Contact Honeywell.
Detector automatically
deactivates.
Automatic deactivation due
to critical low battery.
Replace the battery.
Lockout on Self-Test Error is
enabled and a sensor(s) has
failed the startup self-test.
Change the sensor.
Sensor(s) require
calibration.
Calibrate the detector.
BW Ultra 55 User Manual
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