Maintenance And Inspection; Checking The Battery - Omron Powli BU50SW Instruction Manual

6 6
Measuring and Inspection
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 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.
● 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
20°C
30°C
2. Methods for checking the battery
There are 3 methods for checking the battery.
• Perform a self-diagnostic test. (See page 24.)
• Use the auto battery test function. (See page 24.)
• Measure the backup time. (See page 29.)
By measuring the backup time, the battery life can be determined more accurately.
See also
Measure the backup time according to "5-1 How to measure backup time"
➛ Page 29
If the measured value is equal to the "initial value of the backup time" or less than half the value ob-
tained from the graph of "Estimated backup time" on page 29, 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.
Replacement estimation
Life of battery
4 to 5 years after staring use
4 to 5 years
2 years after staring use
2 to 2.5 years
50 75
BU SW / BU SW / BU
Caution
(for maintenance)
100 150
SW / BU SW
1
2
3
4
5
6
7
8
9
1 0
31