Maintenance And Inspection; Checking The Battery - Omron BN75R Instruction Manual

6

Maintenance and Inspection

When maintaining the connected equipment, turn OFF the unit's power
switch to stop the output, and stop the supply of commercial power.
● 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 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.
Do not create a short between the connector terminals.
● Doing so may cause an electric shock.
6-1

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.
1. Battery life expectancy (* Not a guaranteed performance)
Ambient temperature
25°C
30°C
2. Methods for checking the battery
There are two methods for checking the battery.
• Perform a self-diagnostic test. (See page 30.)
• Measure the backup time. (See page 34.)
By measuring the backup time, the battery life can be determined more accurately.
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 35, 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.
Caution
(for maintenance)
Battery life expectancy
5 years
4 years
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