NEC S2900 User Manual page 100

5. Make sure that the battery switch of the battery backup unit for replacement is set to OFF.
6. Insert the replacement battery backup unit into the slot and secure it with two screws. For
the insertion, fit the drop protection claw to the notch on the chassis, slide the unit to the left,
and insert it slowly.
When inserting the battery backup unit into the array controller, push it as far as it will go
and then secure it with the screws.
Incorrect insertion may cause amalfunction.
7. Set the battery switch of the replaced battery backup unit to ON.
8. Install the battery cover on the array controller.
9. Install the front bezel on the array controller and lock it with a key.
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