4
Operation
Do not disconnect the ground conductor cable on the UPS or the building wiring terminals at any time
since this would cancel the protective earth of the UPS system and of all connected loads.
The UPS system features its own, internal current source (batteries), therefore, the UPS output
sockets or output terminal blocks 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” button, and then disconnect the
mains.
Ensure that no liquid or other foreign objects can enter into the UPS system.
The EPO, RS-232 and USB circuits are an IEC 60950-1 safety extra low voltage (SELV) circuit. This
circuit must be separated from any hazardous voltage circuits by reinforced insulation.
Maintenance, Service and Faults
The UPS system operates with hazardous voltages. Repairs may be carried out only by qualified
maintenance personnel.
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 are electrically live and dangerous.
Before performing any service and/or maintenance, disconnect the batteries and verify that no
current is present and no hazardous voltage exists on the terminals of the 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.
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.
Do not dispose of batteries in a fire. The batteries may explode.
Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It may be
toxic.
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 watches, rings, or other metal objects.
•
Use tools with insulated handles.
•
Wear rubber gloves and boots.
•
Do not lay tools or metal parts on top of batteries.
•
Disconnect charging source and load prior to installing or maintaining the battery.
•
Remove battery grounds during installation and maintenance to reduce likelihood of shock. Remove the
connection from ground if any part of the battery is determined to be grounded.