PowerWalker VFI 6000T LCD - Manual (Page 20)

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3) Set the external battery pack breaker in “OFF” position and
connect the 20 pieces of batteries in series.
4) Connect the external battery pack to the battery terminals.
Check the polarity of connection is correct.
5) Set the breaker of the battery pack in the “ON” position.
6) Set the mains input breaker in the “ON” position, the UPS
would power on and start to charge the battery pack.
4.5 EPO Connection
4.5.1 Introduction
Emergency power off function which the UPS supplies is, when the
emergency occurs, such as the failure of load, the UPS can cut off
the output at once by operating the EPO port manually.
4.5.2 The connection
Normally the EPO connector is opened without any connection on
the rear panel. Once the connector is closed with a wire, the UPS
would stop the output and enter EPO status.
Enable the EPO status Disable the EPO status
Fig. 4-8 Default EPO status
To recover to normal status, first EPO connector should be opened,
and enter LCD menu (illustrated in the chapter of 5.4.5) to clear
EPO status, then UPS would stop alarm and recover to Bypass
model. And UPS needs be turned on by manual operation.
The polarity of connector could be inversed by setting in LCD menu
in the chapter of 5.4.7. Contact your local distributor for further
information before modifying the settings.