PowerWalker VFI 6000T LCD - Manual (Page 29)

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Fig. 5-11 Overload
While doing the battery test, LEDs would be lighted circularly, and
the symbol of battery test would be shown on the display.
Fig. 5-12 Battery test
And if the battery status detected is “battery disconnected”, the
symbol of battery failure would be shown and UPS would alarm.
Fig. 5-13 Battery fails