HP A3550A Battery Backup Unit Installation Guide (20-slot) - Page 1
HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure Manual
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Hewlett-Packard Battery Backup Unit (BBU) Installation Guide (20-slot Disk Arrays) Hewlett-Packard BBUs are customer installable and replaceable. A replacement 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. . BBU 20-slot deskside and rackmount disk arrays (rear view) (shown with fan packs removed for clarity) Figure 1. Install or replace a BBU by performing the following steps. Place a check in the appropriate o as the step is completed. Step 1: Observe antistatic precautions A BBU is shipped with an ESD kit containing: - ESD wrist strap - ESD conductive sheet o Ground the ESD wrist strap to any unplated metal on the disk array chassis and fasten the strap to your wrist. Step 2: Prepare to install the BBU o Remove the new BBU from its shipping carton and place it on a suitable antistatic surface or the ESD conductive sheet. o Open the fan pack by sliding the LOCK/UNLOCK switch to the UNLOCK position 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 shutdown. Step 3: Install the BBU o Locate the slot where the BBU is to be installed (Figure 1) and remove the failed BBU or the BBU filler panel if present (Figure 2). To remove the BBU, slide the black latches toward the center of the unit and extract the BBU. o Install the BBU as shown in Figure 2. o Push 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.