ProLiant DL145 Generation 3 Server Maintenance and Service Guide

Removal and replacement procedures 11
Server warnings and precautions
WARNING! Hazardous voltages are present inside the server. Always disconnect AC power from the server
and other associated assemblies while working inside the unit. Serious injury may result if this warning is not
observed.
WARNING! To reduce the risk of personal injury from hot surfaces, allow the hot-plug drives and the internal
system components to cool before touching them.
WARNING! To reduce the risk of electric shock or damage to the equipment:
• Do not disable the power cord grounding plug. The grounding plug is an important safety
feature.
• Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all
times.
• Disconnect all power cords to completely remove power from the system.
CAUTION: Protect the server from power fluctuations and temporary interruptions with a regulating
uninterruptible power supply (UPS). This device protects the hardware from damage caused by power surges
and voltage spikes and keeps the system in operation during a power failure.
CAUTION: The server must always be operated with the system top cover closed. Proper cooling is not
achieved if the system top cover is removed.
Hardware configuration information
Electrostatic discharge information
Proper packaging and grounding techniques are necessary precautions to prevent damage. To prevent
electrostatic damage, observe the following precautions:
• Transport products in static-safe containers such as conductive tubes, bags, or boxes.
• Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.
• Cover workstations with approved static-dissipating material. Use properly grounded (earthed) tools and
equipment and a wrist strap connected to the work surface.
• Keep the work area free of nonconductive materials, such as ordinary plastic assembly aids and foam
packing.
• Make sure that you are always properly grounded (earthed) when touching a static-sensitive component or
assembly.
• Avoid touching pins, leads, or circuitry.
• Always place drives with the Printed Circuit Board (PCB) assembly-side down.
• Use conductive field service tools.
Pre-installation procedures
Perform the steps below before you open the server or before you remove or replace any component:
WARNING! Failure to properly turn off the server before you open the server or before you start removing or
installing hardware components may cause serious damage as well as bodily harm.
1. Turn off the server and all the peripherals connected to it.
Refer to the “Powering down the server” section on page 12 for detailed instructions on how to completely
power down the server.
2. Disconnect the AC power cord from the power supply cable socket located on the server rear panel to
eliminate the risk of electrical shock.