PowerWalker VFI 1000T LCD - Manual (Page 22)

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If output overloaded, the load percent is shown and alarm will keep
twice every second. You should get rid of some unnecessary loads
one by one to decrease the loads connected to the UPS less than
90% of its nominal power capacity.
Note: Please follow the following steps to connect the 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.
6.2 Battery mode
The LCD display in battery mode is shown in the following diagram.
The information about the utility power, the battery, the UPS output
and the load could be displayed. The “MODE” and “3” code indicate
the UPS is working in the battery mode.
■ ■ ■ ■
The Line mode