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Safety Precautions
Read this manual thoroughly, paying special attention to the sections that apply to you, before work-
ing with the Liebert FS.
Under typical operation and with all cabinet doors closed, only normal safety precautions are neces-
sary. The area around the Liebert FS should be kept free from puddles of water, excess moisture or
debris.
Special safety precautions are required for procedures involving handling, installation and mainte-
nance of the Liebert FS. Observe precautions in 7.0 - Maintenance before as well as during perfor-
mance of any maintenance procedure on the Liebert FS.
This equipment contains circuitry that is energized with high voltage. Only test equipment desig-
nated for troubleshooting should be used. This is particularly true for oscilloscopes. 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 voltage may exist at the capacitor banks.
ONLY qualified service personnel should perform maintenance on the Liebert FS. 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 insulating shoes for isolation
from direct contact with the floor (earth ground).
One person should never work alone. A second person should be standing by to assist and summon
help in case an accident should occur.
!
CAUTION
Do not loosen or tamper with vacuum components and fittings.
!
CAUTION
This unit contains components sensitive to electrostatic discharge.
!
CAUTION
Do not remove plug-in printed circuit cards during operation. Improper removal of a card can
cause severe damage to the unit.
!
CAUTION
The 110/230VAC must remain connected at all times to ensure reliable backup power to
Liebert FS auxiliaries.
!
CAUTION
Do not use this unit for other than its intended use.
!
CAUTION
A qualified electrician must perform all electrical connections.
All wiring size and installation must comply with all applicable local, regional and national
regulations (e.g., National Electric Code for USA).
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