Njoy Aster Series User Manual page 22

A64 Over Load Warning: UPS is overload.
A66 EPO Off: Missing the EPO connection
High Temperature: High ambient temperature, or the
A68 ventilation hole has been covered. This is shown only
when start up UPS.
A69 Fan Lock: fans can't work because of lock.
8.5 Button operation
Button
ON
OFF
ENTER
ESC
ENTER + ESC
ON + ENTER
22
ON
Operation Description
Press this button to turn on UPS. In line mode, ECO
mode, or converter mode, press the "ON" button for
5 seconds to activate the battery test.
Press this button to turn off UPS.*
Press this button simultaneously for 5 seconds to get
into setting mode while in bypass mode, or standby
mode. In setting mode, press this button to confirm
selection, or press this button for long time to exit
setting mode and saving changes.
In setting mode, press this button to display next
selection, or press this button for long time to exit
setting mode without saving changes. Press the
"ESC" button simultaneously for 5 seconds to disable
and enable buzzer alarm.
Switch to bypass mode: When the main power is
normal, press these two buttons simultaneously for 5
seconds, then UPS will enter to bypass mode.
Rotate the LCD display: if user want to change
LCD to tower display, press these two buttons
simultaneously for 5 seconds.
ESC