39
5. Maintenance and inspection
When maintaining the connected equipment, turn OFF the power switch
and disconnect the AC input plug.
●
The backup function continues to supply power from the power output receptacles while the
UPS is operating, even when the AC input plug is disconnected.
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.
5-1 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)
2. Method to check the battery
There are 3 methods for checking the battery.
• Perform a self-diagnostic test. (See page 32.)
• Use the auto battery test function. (See page 32.)
• Measure the backup time. (See page 46.)
By measuring the backup time, the battery life can be determined more accurately.
See also
Measure the backup time according to "7-1 Measuring method of the backup time."
➛
Page 60
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 60, 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.
3. Guideline on the frequency of checking the battery (measuring the backup time)
* The battery deteriorates even if it is stored. The higher the temperature is, the shorter the life
becomes.
5. Maintenance and Inspection
Caution
(maintenance)
Ambient temperature
20
°
C
30
°
C
Life of battery
4 to 5 years
2 to 2.5 years
Replacement estimation
4 to 5 years after staring use
2 years after staring use
Ambient temperature
20
°
C
30
°
C
Check at intervals of 6 months
Until 3 years from purchase
Until 1.5 years from purchase
Check at intervals of 1 month
From after 3 years
From after 1.5 years
