3. Operation and Operating mode
--13--
2) When being powered off, the UPS will perform self-diagnosis, the Load/Battery
level LEDs will be turned on and then off one after another in ascending order.
Finally no any display is shown on the display panel and no voltage is available
from the UPS output.
Suggestions: Please turn off the connected loads before turning on the UPS and turn
on the loads one by one after the UPS is working in INV mode. Turn off all of the
connected loads before turning off the UPS.
3.2 Operating mode
1. Utility power mode
The display panel in utility power mode is shown in the following diagram. The utility
power LED and the INV LED are turned on. The load level LEDs will be turned on in
accordance with the load capacity connected.
1) If the battery LED is turned on and the utility power LED flashes, it indicates the
voltage or frequency of the utility power has exceeded the normal range, the UPS
operates in battery mode.
2) If output overloaded is over 105%, the load level LEDs will be turned on and alarm
will keep twice every second. You should get rid of some unnecessary loads one by
one less than 90% of its nominal power capacity.
Note: Please follow the following steps to connect the generator:
l Activate the generator and wait until the operation is stable before supplying
generator power 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.
l The power capacity of the AC generator should be at least twice of the UPS capacity.
Fig 3-1 The utility power mode
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