4 Maintenance and Inspection
4-2 Replacing the battery
BU100RS
65
4
4-2-1 Notification that the battery needs to be replaced
This Battery life counter function notifies you with LED display and beep sound when the
battery needs to be replaced.
The battery life is determined by the counter function. The battery life counter operates
while commercial power is supplied after shipment. (When the ambient temperature of the
battery is higher than 25°C, the value of the counter will be incremented at a faster pace.)
Notes
The lead battery used in the unit has a limited lifespan. The life varies
depending on your storage/use environment and backup frequency.
●
The nearer the end of the life is, the more rapidly deterioration proceeds.
Refer to the below-shown reference data “Battery life” for the details about the life
of the battery.
The battery deteriorates even if it is stored. The higher the temperature is, the
shorter the life becomes.
■
Guidelines for how often to check the battery
Average ambient temperature
6-month check
Monthly check
40
°
C
For the first 1 years after starting
use
When 1 years or more have passed
after starting use
30
°
C
For the first 3 years after starting
use
When 3 years or more have passed
after starting use
25
°
C
For the first 4 years after starting
use
When 4 years or more have passed
after starting use
