PARTS
34 CHAPTER 2
2.26.7 MAINTENANCE, SERVICING AND FAULTS
• The UPS system operates with hazardous voltages. Repairs may be carried out only by quali-
fied maintenance personnel.
Risk of electric shock. Even after the unit is disconnected from the mains power supply (building
wiring socket outlet), components inside the UPS system area still connected to the battery and
are still electrically live and dangerous. Before carrying out any kind of servicing and/or mainte-
nance, disconnect the batteries and verify that no current is present.
• Only persons adequately familiar with battery and with the required precautionary mea-
sures may exchange 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 volt-
ages may occur between the battery terminal 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 pre-
cautionary 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
• When changing batteries, install the same number and the same type of batteries.
• Do not attempt to dispose of batteries by burning them. This could cause battery explosion.
• Do not open or destroy batteries. Escaping electrolyte can cause injury to the skin and eyes.
It me be toxic.
• Please replace the fuse only by a fuse of the same type and of the same amperage in order to
avoid fire hazards.
• Do not dismantle the UPS system.
2.26.8 INDICATORS AND OPERATING CONTROLS
FIGURE 2.44 FRONT PANEL UPS
FAULT LED
Load and battery
capacity LEDs
LINE LED
STANDBY SWITCH
ON SWITCH
BYPASS LED
INVERTER LED
BATTRERY LED
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