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Hewlett-Packard A3550A - High Availability Disk Arrays Model 20 Storage Enclosure Installation Manual

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Hewlett-Packard Power Supply

 Installation Guide

Hewlett-Packard power supplies are installable and replaceable. A replacement or add-on power supply must be the same 
type as the power supplies already installed in the array.

The locations of the power supplies in the 30-slot disk arrays are shown in Figure 1.

.

Figure 1.

Install a power supply by performing the following steps.  Place a check in the appropriate 

o

 as the step is completed.

Step 1:

Observe antistatic precautions

A power supply 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. 
On 30-slot disk arrays, the ESD wrist strap can be 
grounded to the metal edge above the rear retaining 
screws. 

Step 2: 

Prepare to install the power supply

o

Remove the new power supply from its shipping carton 
and place it on a suitable antistatic surface or the ESD 
conductive sheet.

o

Press the release button on the fan pack and carefully 
swing the fan pack down.

The installation or removal and replacement 

MUST be com-

pleted and the fan pack closed within two minutes or the 
disk array will perform a thermal shutdown.

Power
supply

Disk array rear view