5 Maintenance and inspection
S8BA-24D24D□□□LF
5
5 Maintenance and inspection
For cautions when maintaining the UPS, refer to “Caution (for maintenance)” shown in the
“Safety precautions” of the beginning of this manual.
5-1 Checking the battery
The 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.
5-1-1 Battery life expectancy
Ambient temperature Battery life expectancy
40°C 5 years
25°C 10 years
*Not a guaranteed performance.
5-1-2 Self-diagnosis test
This test performs a failure diagnosis on the unit and performs a test to check for battery
deterioration.
Use the procedure below to check whether a circuit failure has occurred inside the unit and
whether battery replacement is required.
There are two, automatic testing and manual testing, in the self-diagnosis test as follows.
■ Automatic testing
The self-diagnosis test is automatically performed at the factory settings, at the following
timing in the state that the UPS is connected to a commercial power source and the charge
of the battery has been completed. User’s operation to start the test is unnecessary.
▪ When the UPS is started up by pressing the “Power” switch
▪ When power has been supplied for four weeks
If the battery is not sufficiently charged, the self-diagnostic test is not performed. The test is
automatically performed when the battery is charged completely.
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