1.5 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 button to disconnect the
mains.
Prevent no fluids or other foreign objects from inside of the UPS system.
1.6 Maintenance
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!
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