Xtreme Power Conversion Corporation
NXTi 3P-3P User’s Manual
Page 13
Uninterruptible Power Supply
loads connected to the UPS less than 80% of its nominal power capacity to prevent overload for system
safety.
5.
If the overload time is over acceptable time listed in spec at AC mode, the UPS will automatically transfer
to Bypass mode. After the overload is removed, it will return to AC mode. If the overload time is over ac-
ceptable time listed in spec at Battery mode, the UPS will become fault status. At this time, if bypass is
enabled, the UPS will power to the load via bypass. If bypass function is disabled or the input power is not
within bypass acceptable range, it will cut off output directly.
Charge the batteries
1.
After the UPS is connected to the utility power, the charger will charge the batteries automatically except
in Battery mode or during battery self-test.
2.
Suggest to charge batteries at least 10 hours before use. Otherwise, the backup time may be shorter than
expected time.
3. Make sure the battery numbers setting on the control board is consistent to real connection.
Battery mode operation
1.
When the UPS is in Battery mode, the buzzer will beep according to different battery capacity. If the bat-
tery capacity is more than 25%, the buzzer will beep once every 4 seconds; If the battery voltage drops to
the alarm level, the buzzer will beep quickly (once every sec) to remind users that the battery is at low level
and the UPS will shut down automatically soon. Users could switch off some non-critical loads to disable
the shutdown alarm and prolong the backup time. If there is no more load to be switched off at that time,
you have to shut down all loads as soon as possible to protect the devices or save data. Otherwise, there
is a risk of data loss or load failure.
2.
In Battery mode, if buzzer sound annoys, users can press the Mute button to disable the buzzer.
3. The backup time of the long-run model depends on the external battery capacity.
4. The backup time may vary from different environment temperature and load type.
5.
When setting backup time for 16.5 hours (default value from LCD panel), after discharging 16.5 hours, UPS
will shut down automatically to protect the battery. This battery discharge protection can be enabled or
disabled through LCD panel control.
Test the batteries
1.
If you need to check the battery status when the UPS is running in AC mode/CVCF mode, you could press
the “Test” button to let the UPS do battery self-test.
2.
Users also can set battery self-test through monitoring software.
Turn off the UPS with utility power supply in AC mode
1.
Turn off the inverter of the UPS by pressing “OFF” button for at least 0.5s, and then the buzzer will beep
once. The UPS will turn into Bypass mode.
NOTE 1:
If the UPS has been set to enable the bypass output, it will bypass voltage from utility power to
output terminal even though you have turned off the UPS (inverter).
NOTE 2:
After turning off the UPS, please be aware that the UPS is working at Bypass mode and there is
risk of power loss for connected devices.
2.
In Bypass mode, output voltage of the UPS is still present. In order to cut off the output, switch off the line
input breaker(for dual input unit, also switch off the bypass line breaker). A few seconds later, there is no
display shown on the display panel and UPS is complete off.
Turn off the UPS without utility power supply in Battery mode
1.
Turn off the UPS by pressing “OFF” button for at least 0.5s, and then the buzzer will beep once.
2.
Then UPS will cut off power to output and there is no display shown on the display panel.
