Njoy Balder Series User Manual page 8

Operation
• Do not disconnect the mains cable on the UPS system or the building
wiring outlet (shockproof socket outlet) during operations since this
would cancel the protective earthing of the UPS system and of all
connected loads.
• 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 outlet.
• In order to fully disconnect the UPS system, first press the OFF/Enter
button to disconnect the mains.
• Prevent fluids or other foreign objects from entering the inside of the
UPS system.
WARNING: This is a category C2 UPS product. In a residential
•
environment, this product may cause radio interference, in which case
the user may be required to take additional measures.
Maintenance, service and faults
• The UPS system operates with hazardous voltages. Repairs may be
carried out only by qualified maintenance personnel.
• Caution - risk of electric shock. Even after the unit is disconnected from
the mains (building wiring outlet), components inside the UPS system are
still connected to the battery and electrically live and dangerous.
• Before carrying out any kind of service and/or maintenance, disconnect
the batteries and verify that no current is present and no hazardous
voltage exists in the terminals of high capability capacitor such as BUS-
capacitors.
• Only persons are adequately familiar with batteries and with the required
precautionary measures may replace batteries and supervise operations.
Unauthorized persons must be kept well away from the batteries.
• 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!
• Batteries may cause electric shock and have a high short-circuit current.
Please take the precautionary measures specified in this manual 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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