HP A3550A - High Availability Disk Arrays Model 20 Storage... User manual

Hewlett-Packard Battery Backup Unit (BBU)
Installation Guide (20-slot Disk Arrays)
Hewlett-Packard BBUs are customer installable and replaceable. Areplacement BBU must be the same type as the BBU
being replaced.
The locations of the BBUs in the 20-slot disk arrays are shown in Figure 1.
.
Figure 1.
Install or replace a BBU by performing the following steps. Place a check in the appropriate oas the step is completed.
Step 1: Observe antistatic precautions
ABBU is shipped with an ESD kit containing:
–ESDwriststrap
– ESDconductive sheet
oGround the ESDwrist strap to any unplated metal on
the disk arraychassis and fasten the strap to your wrist.
Step 2: Prepare to install the BBU
oRemove the new BBU from its shipping carton and
place it on a suitable antistatic surface or the ESD
conductive sheet.
oOpen the fan pack by sliding the LOCK/UNLOCKswitch
to the UNLOCKposition and carefully swinging the fan
pack open.
The BBU can be installed or replaced with array power on.
The installation or replacement MUST be completed and the
fan pack closed within two minutes to avoid a thermal shut-
down.
Step 3: Install the BBU
oLocate the slot where the BBU is to be installed (Figure
1) and remove the failed BBU or the BBUfiller panel if
present (Figure 2). To remove the BBU, slide the black
latches toward the center ofthe unit and extract the
BBU.
oInstall the BBU as shown in Figure 2.
oPush the BBU into the disk array chassis until the
latches on the BBU lock and audible clicks are heard.
When the latches are locked,the BBU cannot be pulled
out again without using the latches.
BBU
20-slot deskside and rackmount disk arrays (rear view)
(shown with fan packs removed for clarity)

Figure 2.
oClose the fan pack by carefully swinging the fan pack
closed and firmly pressing it onto the latch and sliding
the LOCK/UNLOCK switch to the LOCK position.
For more information on BBU installation procedures and
recharge times, see the (EWLETT0ACKARD(IGH!VAILABILITY
3#3)$ISK!RRAY5SER'UIDE.
Squeeze the latches toward the
center of the BBU Remove or install
Manual Part Number
A3232-90008 E0897 Copyright © 1997 Hewlett-Packard Company
*PA3232-96026*
A3232-96026