PowerWalker VFI 1000E - Manual (Page 3)

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2.4 Operation
1. Do not disconnect the mains cable on the UPS system or the building wiring
socket outlet during operations since this would cancel the protective
earthing of the UPS system and of all connected loads.
2. The UPS has its own internal power source (batteries). The output terminals
may be live even when the UPS is not connected to the AC supply.
3. Ensure that no fluids or other foreign objects can enter the UPS system.
2.5 Maintenance and Service
1. Caution - risk of electric shock.
Even after the unit is disconnected from the mains power supply (building
wiring socket outlet), components inside the UPS system are still connected
to the battery and are still electrically live and dangerous. Before carrying out
any kind of servicing and/or maintenance, disconnect the batteries and verify
that no current is present.
2. Only persons adequately familiar with batteries and with the required
precautionary measures may exchange batteries and supervise operations.
Unauthorised persons must be kept well away from the batteries.
3. 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 wristwatches, rings and other metal objects
- use only tools with insulated grips and handles.
4. When changing batteries, install the same number and same type of
batteries.
5. Do not attempt to dispose of batteries by burning them. This could cause
battery explosion.
6. Do not open or destroy batteries. Escaping electrolyte can cause injury to
the skin and eyes.
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3. SYSTEM DESCRIPTION
3.1 LCD Display(Includes detachable LCD function with connecting from
remote control port to RS-232)
1. LCD Display: This indicates the UPS operation information, including UPS
status, input/output voltage, input/output frequency, battery voltage,
battery capacity left, output load, inside temperature, and the times of
history events.
2. LCD Select Up-key: It is pressed to select upward the UPS status on LCD
Display.
3. LCD Select Down-key: It is pressed to select downward the UPS status on
LCD Display. When UPS is in operation press this key and the LCD Select
Up-key simultaneously for 3 seconds, the UPS will be switched off after
two beeps.
4. Control Key: When this key is pressed with the LCD Select Down-key
simultaneously for 3 seconds, the UPS will be switched on after two beeps.
Similarly. Beside, in battery operation mode, press both of this key and
LCD Select Up-key at the same time to disable the buzzer.