Njoy Aster 6KT User Manual page 9

5.2 EPO Connection
EPO (Emergency power off): 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.
The connection:
Normally the EPO connector is closed with a wire on the rear
panel (Fig.4-4), which is supplied in the accessory. Once the
connector is open, the UPS would stop the output and enter EPO
status (Fig.4-3).
Fig.4-3 Enable the EPO status
To recover to normal status, first EPO connector should be closed
(Fig.4-4), and press button ON more than 1 second to clear EPO
status, then UPS would stop alarm and recover to Bypass model. And
UPS needs be turned on by manual operation.
Fig.4-4 Disable the EPO status
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