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Battery Backup Operation
When the alarm is unplugged or loses AC power and the battery pack is fully
charged, the alarm will automatically switch to battery backup operation and
you will notice the following:
• For the first five minutes of operation on battery, the alarm
will operate as if on AC power.
• However, after five minutes of operation, to conserve battery
capacity, the display will flash the CO level (usually "0") once
every 60 seconds.
Caution: If the unit detects CO and enters an alarm state while in bat-
tery back-up condition,the CO level will be displayed and the audible
alarm pattern of four quick beeps will sound once every 60 seconds.
Battery Back-up Operation in Low Battery "Lb" Condition:
When the battery pack is not fully charged, the unit will begin displaying "Lb"
and "chirp" once every 15 seconds. This will last approximately 7 hours to
warn you the battery is losing capacity. Apply AC power to charge battery as
soon as possible.
NOTE: While in the low battery "Lb" warning mode,the unit is sensing
for and will alarm if CO is detected.
Battery Back-up Operation in Trouble Alarm Condition:
When the battery pack capacity has been discharged to a state where it can
no longer provide enough power to detect CO and operate the alarm, it will
enter a trouble alarm condition. The display will go blank and the alarm will
give an audible trouble "chirp" once every 60 seconds. This will continue for
approximately 7 hours after which time the alarm will no longer "chirp" to warn
of a trouble condition.
WARNING:THE UNIT WILL NOT DETECT CO WHILE IN THE TROU-
BLE ALARM CONDITION, BLANK DISPLAY,AND ONE AUDIBLE TROU-
BLE "CHIRP" EVERY 60 SECONDS. APPLY AC POWER TO CHARGE
THE BATTERY AS SOON AS POSSIBLE.
When AC power is restored, the alarm will automatically switch back to nor-
mal operating mode and begin charging the battery pack to full capacity. After
continued operation on battery backup, "Lb" may flash while the battery is
recharging and will continue until fully charged.
Constant exposures to high or low humidity may reduce
battery life.
WARNING:
Replace the battery pack only with a Bryant rechargeable bat-
tery pack. Replacement battery packs can be purchased from
Bryant customer service. See page 28 for additional precau-
tions regarding the rechargeable battery pack.
Battery Backup Operation
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