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4 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.
4-1
Checking the battery
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.
4-1-1 Battery life expectancy
Ambient
temperature
25℃
30℃
35℃
40℃
* Not a guaranteed performance
4-1-2 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 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 "Power" switch is turned ON from OFF
・Performed with one time per four weeks on the condition that the "Power" switch is ON
When charge of the battery is not completed, the self-diagnosis test is not performed
immediately.
* The automatic execution of a self-diagnostic test every four weeks can be turned
ON/OFF using the "Setting" switch 3.
BU150R
Battery life
expectancy
5 years
3.5 years
2.5 years
1.7 years
4 Maintenance and Inspection
4-1 Checking the battery
4
61
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