HP 124708-001 - ProLiant Cluster - 1850 Error Prevention Manual - Page 8

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Be sure the server does not share a power line with high-current machines, such

as laser printers, air conditioners, copiers, and coffee machines, or ungrounded

power strips.

•

Periodically check AC grounded (earthed) outlets to see if they are in need of

repair.

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Take the system cover off, and then remove any dust buildup with a can of

compressed air, tighten any loose connections, reseat boards, and inspect any

cables for frays. Move the cables away from sources of heat and give them more

slack if possible.

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Check for adequate airflow and dislodge anything blocking the fans.

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Check for dust on external server parts, such as fans.

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Check the server after power disruptions due to acts of nature. Refer to the

"Recognizing Power Problems Caused by Acts of Nature" section in this guide.

Recognizing Power Problems Caused by

Acts of Nature

Some power problems are caused by acts of nature, which can range from lightning

and excessive heat to ice, rain, and windstorms. Lightning can cause spikes and

surges (a spike is a quick impulse of undesirable high voltage on a power line,

typically lasting only a fraction of a second, whereas a surge is a sudden increase in

line voltage of short duration). Excessive heat from increased use of air conditioners

can overload utility grids, causing erratic voltages, brownouts, or power outages

(brownouts are voltage reductions by a utility company to counter excessive demand

on its generation and distribution system). Storms can cause total blackout conditions

due to downed power lines.

Error Prevention Guide

CAUTION: To avoid potential problems, always read the cautionary information

in the server documentation before removing, replacing, reseating, or modifying

system components.