1 IMPORTANT SAFETY INSTRUCTIONS
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This manual contains important instructions that should be followed during operation and maintenance of the
Liebert®Trinergy™ Cube uninterruptible power system and DC source.
WARNING! Risk of electric shock. Can cause equipment damage, injury or death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel. Refer to separate
installation manual for equipment handling information and installation procedures.
Follow all DC source safety precautions when installing, charging or servicing DC sources. In addition to the hazard of
electric shock, gas produced by batteries can be explosive and sulfuric acid can cause severe burns. In case of fire involving
electrical equipment, use only carbon dioxide fire extinguishers or others approved for use in electrical fire fighting.
Extreme caution is required when performing maintenance. Service and maintenance work must be performed only by
properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers’
specifications.
Be constantly aware that the UPS contains high DC as well as AC voltages. With input power off and the DC source
disconnected, high voltage at filter capacitors and power circuits should be discharged within 5 minutes. However, if a
power circuit failure has occurred, assume that high voltage still exists after shutdown. Check with a voltmeter before
making contact.
AC voltage will remain on the system bypass, the UPS output terminals and the static bypass switch, unless associated
external circuit breakers are opened. Check for voltage with both AC and DC voltmeters prior to making contact. When the
UPS is under power, both the operator and any test equipment must be isolated from direct contact with earth ground and
the UPS chassis frame by using rubber mats. Some components within the cabinets are not connected to the 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.
1 Important Safety Instructions
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