Battery Backup Operation
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
Battery
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
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 INTHETROU- BLE ALARM CONDITION,BLANK DISPLAY,AND ONE AUDIBLETROU- BLE "CHIRP" EVERY 60 SECONDS. APPLY AC POWERTO 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 Carrier rechargeable bat- tery pack. Replacement battery packs can be purchased from Carrier customer service. See page 28 for additional precau- tions regarding the rechargeable battery pack.
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