PowerWalker Battery Pack for VFI 1000RT LCD - Manual (Page 25)

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Normally the EPO connector is closed with a wire on the rear panel. Once
the connector is open, the UPS would stop the output until the EPO status is
disabled.
Enable the EPO status Disable the EPO status
5.3 Battery charge
Fully charge the batteries of the UPS system by leaving the UPS system
connected to the mains for 1-2 hours. You may use the UPS system directly
without charging it but the stored energy time may be shorter than the
nominal value specified.
5.4 Turn on the UPS
(1) With utility power connecting:
Press “I” button continuously for more than 1 second to turn on the UPS, the
UPS will get into the inverter mode, the LCD screen will indicate the state of
the UPS.
(2) Without utility power connecting:
If UPS is cold start without utility power connecting, user need to push “I”
button twice, first pushing “I” button is for UPS to get power, LCD screen
show ‘INIT’. And second pushing “I” button continuously for more than 1
second is for UPS to turns on, the UPS will get into the inverter mode. In fact,
the two pushing “I” button is to make further sure user operation for turning
on UPS, the LCD screen will indicate the state of the UPS.
Note: The default setting for bypass mode is no output after UPS is
connecting utility power and breaker is turned on. This can be configured by
monitoring the LCD panel or firmware.
5.5 Test function
(1) Real time detection
UPS could do real-time detection when battery connected or disconnected. If
the battery connection status is changed, in floating mode, UPS will detect the