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Safety Precautions 3
1.0 SAFETY PRECAUTIONS
Read this manual thoroughly, paying special attention to the sections that apply to you, before
working with the UPS. Retain this manual for use by installing personnel.
Under typical operation and with all UPS doors closed, only normal safety precautions are neces-
sary. The area around the UPS system should be kept free from puddles of water, excess mois-
ture, or debris.
Special safety precautions are required for procedures involving handling, installation, and main-
tenance of the UPS system or the battery. Observe all safety precautions in this manual before
handling or installing the UPS system. Observe all precautions in the Operation and Mainte-
nance Manual, before as well as during performance of all maintenance procedures. Observe all
battery safety precautions before working on or near the battery.
This equipment contains several circuits that are energized with high voltage. Only test
equipment designated for troubleshooting should be used. This is particularly true for oscillo-
scopes. Always check with an AC and DC voltmeter to ensure safety before making contact or
using tools. Even when the power is turned Off, dangerously high potentials may exist at the
capacitor banks and at the batteries.
ONLY qualified service personnel should perform maintenance on the UPS system.
When performing maintenance with any part of the equipment under power, service personnel
and test equipment should be standing on rubber mats. The service personnel should wear insu-
lating shoes for isolation from direct contact with the floor (earth ground).
Unless all power is removed from the equipment, one person should never work alone. A second
person should be standing by to assist and summon help in case an accident should occur.
Four types of messages are used throughout the manual to stress important text. Carefully read
the text below each Danger, Warning, Caution, and Note and use professional skills and prudent
care when performing the actions described by that text.
A Danger signals immediate hazards resulting in severe personal injury or death. For example:
A Warning signals the presence of a possible serious, life-threatening condition. For example:
A Caution indicates a condition that could seriously damage equipment and possibly injure per-
sonnel. For example:
A Note emphasizes important text. If the note is not followed, equipment could be damaged or
may not operate properly. For example:
DANGER
A DANGER SIGNALS IMMEDIATE HAZARDS WHICH WILL
RESULT IN SEVERE PERSONAL INJURY OR DEATH.
WARNING
LETHAL VOLTAGES MAY BE PRESENT WITHIN THIS UNIT
EVEN WHEN IT IS APPARENTLY NOT OPERATING. OBSERVE
ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE
TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO
NOT WORK ON OR OPERATE THIS EQUIPMENT UNLESS YOU
ARE FULLY QUALIFIED TO DO SO!! NEVER WORK ALONE.
CAUTION
Extreme care is necessary when removing shoring braces. Do not
strike the cabinet with hammers or other tools.
NOTE
If the UPS system has a blown fuse, the cause should be determined before
you replace the fuse. Contact Liebert Global Services.