Liebert PS User Manual page 4

Liebert PS UPS
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In the event of Emergency press 'OFF' button and disconnect the power cord from AC Power supply
to properly disable the UPS
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Do not plug UPS input to its own output. Do not attach power-strip or surge suppressor to the UPS
Operation
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Do not disconnect the mains cable on the UPS system or the building wiring socket outlet
(shockproof socket outlet) during operations since this would cancel the protective earthing of the
UPS system and of all connected loads.
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The UPS system features its own, internal current source (batteries). The UPS output sockets or
output terminals block may be electrically live even if the UPS system is not connected to the
building wiring socket outlet.
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In order to fully disconnect the UPS system, first press the Standby switch then disconnect the
mains lead.
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Ensure that no fluids or other foreign objects can enter the UPS system.
Maintenance, servicing and faults
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The UPS system operates with hazardous voltages. Repairs may be carried out only by qualified
maintenance personnel.
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Caution - risk of electric shock. Even after the unit is disconnected from the mains power supply
(building wiring socket outlet), components inside the UPS system are still connected to the battery
and are still electrically live and dangerous.
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Before carrying out any kind of servicing and/or maintenance, disconnect the batteries and verify
that no current is present and no hazardous voltage exist in the terminals of high capability capacitor
such as BUS-capacitors.
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Only persons who are familiar with batteries and with the required precautionary measures may
replace batteries and supervise operations. Unauthorised persons must be kept well away from the
batteries.
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Caution - risk of electric shock. The battery circuit is not isolated from the input voltage. Hazardous
voltages may occur between the battery terminals and the ground. Before touching, please verify
that no voltage is present!
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Batteries may cause electric shock and have a high short-circuit current. Please take the
precautionary measures specified below and any other measures necessary when working with
batteries:
－ remove wristwatches, rings and other metal objects
－ use only tools with insulated grips and handles
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Do not short circuit battery terminals
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When changing batteries, install the same number and same type of batteries.
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Do not attempt to dispose of batteries by burning them. This could cause battery explosion.
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Do not open or destroy batteries. Escaping electrolyte can cause injury to the skin and eyes. It may
be toxic.
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Please replace the fuse only by a fuse of the same type and of the same amperage in order to avoid
fire hazards.
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Do not dismantle the UPS system
Page 1 V2.6
Installation and User Manual
Emerson Network Power