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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation and mainte-
nance of your Liebert FS.
!
WARNING
The installation of the Liebert FS must comply with applicable national, federal, state and
local codes.
ONLY qualified service personnel should perform maintenance on the Liebert FS
system. When performing maintenance with any part of the equipment, service personnel
and test equipment should be standing on rubber mats. The service personnel should wear
insulating shoes for isolation from direct contact with the floor (earth ground).
Never work alone, even if all power is removed from the equipment. A second person should
be standing by to assist and summon help in case an accident should occur.
Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the Liebert FS system should be kept free of puddles of water,
excess moisture and debris.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system. Observe all safety precautions in this manual before
handling, installing or operating the UPS system.
This equipment contains circuits that are energized with high voltage. Only test
equipment designed for troubleshooting and for use with those voltages should be used.
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 electric charges may exist within
the UPS.
!
WARNING
Exercise extreme care when handling Liebert FS cabinets to avoid equipment damage or
injury to personnel. Refer to Section 3.0 and Section 4.0 for equipment handling
information and installation procedures.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
others approved for use in fighting electrical fires.
!
WARNING
Extreme caution is required when performing maintenance.
Be constantly aware that the Liebert FS contains high DC as well as AC voltages. With input
power off and the battery disconnected, high voltage at filter capacitors and power circuits
should be discharged within 30 seconds. However, if a power circuit failure has occurred, you
should assume that high voltage may still exist after shutdown. Check with a voltmeter
before making contact.
Check for voltage with both AC and DC voltmeters prior to making contact.
!
WARNING
When the Liebert FS is under power, both the operator and any test equipment must be
isolated from direct contact with earth ground and the Liebert FS chassis frame by using
rubber mats.
Some components within the cabinets are not connected to chassis ground. Any contact
between floating circuits and the chassis is a lethal shock hazard. Exercise caution that the
test instrument exterior does not make contact either physically or electrically with earth
ground.