6
45
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.
1. Life of battery (estimated replacement timing)
2. Methods for checking the battery
There are 3 methods for checking the battery.
• Perform a self-diagnostic test. (See page 33.)
• Use the auto battery test function. (See page 34.)
• Measure the backup time. (See page 43.)
By measuring the backup time, the battery life can be determined more accurately.
Measure the backup time according to "5-1 How to measure backup time" → Page 43
If the measured value is equal to the "initial value of the backup time" or less than half the value
obtained from the graph of "Estimated backup time" on page 43, replace the battery.
• When you compare the "initial value of the backup time" you measured and the current
backup time, make the capacity of devices connected to the UPS same as when you mea-
sured the initial value to make judgment accurately.
When maintaining the connected equipment, turn OFF the BU75RW/
BU100RW’s power switch and disconnect the AC input plug.
For BU200RW/BU300RW, make sure to turn OFF the power switch and
either disconnect the AC input plug or turn OFF the INPUT PROTECTION
switch (input overcurrent protection switch).
●
Even if commercial power to the UPS is stopped while it is in operation, the power output of this
unit does not stop and power is supplied from the receptacle.
Do not disassemble, repair, or modify the unit.
●
Doing so may cause an electric shock or a fi re.
If fl uid leaks from the unit, do not touch the fl uid.
●
Doing so may cause blindness or burns.
●
If the fl uid contacts your eyes or skin, wash it out with lots of clean water and consult your doctor.
Do not throw the unit into fi re.
●
The lead battery in the unit may explode, or leak dilute sulfuric acid.
Do not insert metal objects into the power supply output receptacles of the UPS.
●
Doing so may result in electric shock.
Do not insert metal objects into the battery connectors.
Do not create a short between the connector terminals.
●
Doing so may cause an electric shock.
6-1
Checking the battery
Maintenance and Inspection
66
Caution
(for maintenance)
Ambient temperature Life of battery Replacement estimation
20°C 4 to 5 years
4 to 5 years after staring use
30°C 2 to 2.5 years 2 years after staring use
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