6. Maintenance and inspection
6. Maintenance and Inspection
Caution (for maintenance)
When maintaining the connected equipment, turn OFF the power switch and disconnect the AC input plug.
●Even if you disconnect the AC input plug while the UPS is operating, the power output of this unit does not stop and power is supplied from the outlet during a power failure.
Do not disassemble, repair, or modify the unit.
●Doing so may cause an electric shock or a fire.
If fluid leaks from the unit, do not touch the fluid.
●Doing so may cause blindness or burns.
●If the fluid contacts your eyes or skin, wash it out with lots of clean water and consult your doctor.
Do not throw the unit into fire.
●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.
●Doing so may result in electric shock.
6-1 Checking the battery
The sealed lead battery used in the unit has a limited life.
(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)
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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2. Methods for checking the battery
There are 3 methods for checking the battery.
•Perform a
•Use the auto battery test function. (See page 42.)
•Measure the backup time. (See page 51.)
By measuring the backup time, the battery life can be determined more accurately.
See also Measure the backup time according to
➛Page 51
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 46, 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 measured the initial value to make judgment accurately.
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