Operation; Maintenance, Service And Faults - CPI LD Series User Manual

1.4 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 before
disconnecting the mains.
• Prevent fluids or other foreign objects from inside of the UPS system.
• The EPO 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.

1.5 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 main
(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.
• To avoid electrical shock, turn off the unit and unplug it form the AC power source before
servicing the battery
• Only persons are adequately familiar with batteries and with the required precautionar
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!
• CAUTION - Do not dispose of batteries in a fire. The batteries may explode.
• CAUTION - 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:
a) Remove watches, rings, or other metal objects.
b) Use tools with insulated handles.
c) Wear rubber gloves and boots.
d) Do not lay tools or metal parts on top of batteries.
e) Disconnect charging source and load prior to installing or maintaining the battery.
f) 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.
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CPI User Manual for Lithium Ion Online UPS 04/22v.1 Page 5