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3. Replacing the battery
The battery can be replaced while the UPS is stopped. (power supply output stopped)
Caution
When an additional battery unit (BUM100S/BUM150S/BUM300S) is connected to the UPS, replace the UPS
battery when replacing the batteries of the additional battery unit. You cannot perform battery replacement
of the additional battery unit only.
Caution
When the UPS is used in compliance with UL, CE standards, do not replace the battery while in operation
(while power is being output). Replacing the battery while in operation does not comply with UL, CE standards.
Replace the battery while UPS operation is stopped.
*To replace the battery while the UPS is stopped, stop the connected devices, turn OFF the power switch of
the UPS, and disconnect the AC input plug from the wall outlet.
* If an input power supply error such as a power failure occurs when replacing the battery while in operation,
backup cannot be performed and output stops.
*Do not replace the battery during backup operation. Output will stop.
Additional battery unit (BUM100S/BUM150S) replacement procedure
For information on UPS battery replacement procedure, refer to the UPS instruction manual.
1. Use a screwdriver to loosen (anti-clockwise rotation) the 2 screws at the top of the front panel of the
additional battery unit until they turn freely. (The screws cannot be removed from the front panel.)
Pull the front panel towards you to remove it. ➀
2. Remove the 2 battery connectors from the plate cover
➀
and disconnect the connectors. ➁
Loosen the 2 screws.
Plate cover
➀
Battery connectors
Hold here to
disconnect.