Niveo Professional NUPS22-6000U - Manual (Page 13)

There are 4 buttons on front panel.
3-3. LED Indicators
There are 4 LEDs on front panel to show the UPS working status:
Mode LED
Bypass Line Battery Fault
UPS Power On    
Bypass mode ● ○ ○ ○
AC mode / Converter mode ○ ● ○ ○
Battery mode ○ ○ ● ○
Fault mode ○ ○ ○ ●
Battery test mode ○ ● ● ○
ECO mode ● ● ○ ○
Note:
●
means LED is lit;
○
means LED is faded;  means LED is flashing.
3-4. Audible alarm
UPS status Buzzer status Muted
Bypass mode Beeping once every 2 minutes Yes
Battery / Battery-test mode (normal battery voltage) Beeping once every 4 seconds Yes
Battery / Battery-test mode (low battery voltage) Beeping once every second Yes
Fault Beeping continuously Yes
Warnings (except overload) Beeping once every second No
Overload Beeping twice every second
No
3-5. Single UPS Operation
3-5-1. Turn on the UPS with utility power supply (to Line mode)
1) Make sure mains input and battery are connected well, and the battery pack breaker is at “ON”
position; Set the external mains input breaker to “ON” position, then the fan will be running and the
UPS supplies power to the loads via bypass; (The UPS is operating in Bypass mode.)
NOTE: When UPS is in Bypass mode, the output voltage comes directly from utility, so the load is not
protected by UPS. To protect the precious load, the UPS should be turned on to Line mode.
2) When LCD is on home page, press the “ON/ENTER” button, LCD will show a prompt page of “Turn On”;
Button Function
ON/ENTER
 Press this button to turn on the UPS.
 Or press it to confirm the selection in the menu.
OFF/ESC
 Press this button to turn off the UPS.
 Or press it to return to last menu.
UP
 Press this button to select the previous item in the menu.
 Or press this button to jump to previous page in the screen.
 Or press this button to increase the number in the setting.
DOWN
 Press this button to select the next item in the menu.
 Or press this button to jump to next page in the screen.
 Or press this button to decrease the number in the setting.
UP + DOWN
 To allow LCD display to rotate 90ºautomatically, press these two buttons at the
same time. This operation is used to configure the UPS in rack or tower display.