04-3598_ABB_PVA11_T_1-3kVA_EN_REV-B.doc Page 22/29 ABB
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In case of output overload, the acoustic alarm will sound twice every second and the percentage of the
load will be displayed. Non critical loads should be shutdown in order to decrease the load percentage
until it reached 90% of its nominal value.
Connecting a Generator
- Activate the generator and wait until the operation is stable before supplying power of the generator to
the UPS (be sure that the UPS is in idle mode). Then turn on the UPS according to the start-up
procedure. After the UPS is turned on, then the loads can be connected to the UPS one by one.
- The power capacity of the AC generator should be at least twice of the UPS capacity.
4.2.4 Battery mode – Code 3
The LCD display of a UPS in battery mode is shown in Figure 8. The information on the mains, battery,
UPS output and load will be displayed and the word “BATTERY” and the code “3” will indicate the
working mode of the UPS.
When the UPS is working in battery mode:
- If the input line voltage is higher than the specified range, the alarm symbol “High!” will appear in the
LCD display.
- If the input line voltage is lower than the specified range, the alarm symbol “Low!” will be shown.
- If the input line voltage is not present, the input voltage and frequency are shown as zero.
In battery mode, the acoustic alarm sounds once every 4 seconds.
- To silence the buzzer, press the “ON” button on the front panel for more than 1 second.
- To resume the alarm function, press the “ON” button once again for more than 1 second.
Figure 8: LCD display for UPS in battery mode
4.2.5 Battery Test – Code 4
The display of the UPS in battery test mode is similar to the one of the battery mode. The battery test
mode code is “4”.
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