Xtreme Power Conversion Corporation
NXTi 3P-3P User’s Manual
Page 14
Uninterruptible Power Supply
Mute the buzzer
1.
To mute the buzzer, please press the “Mute” button for at least 0.5s. If you press it again after the buzzer
is muted, the buzzer will beep again.
2.
Some warning alarms can’t be muted unless the error is fixed.
Operation in warning status
1.
When Fault LED flashes and the buzzer beeps once every second, it means that there are some problems
for UPS operation. Users can get the warning indicator from LCD panel. Please check the trouble shooting
table for details.
2.
Some warning alarms can’t be muted unless the error is fixed.
Operation in Fault mode
1.
When Fault LED illuminates and the buzzer beeps continuously, it means that there is a fatal error in the
UPS. Users can get the fault code from display panel. Please check the trouble shooting table for details.
2.
Please check the loads, wiring, ventilation, utility, battery and so on after the fault occurs. Don’t try to turn
on the UPS again before solving the problems. If the problems can’t be fixed, please contact the distributor
or service people immediately.
3. For emergency case, please cut off the connection from utility, external battery, and output immediately
to avoid more risk or danger.
Operation of changing battery numbers
1.
This operation is only available for professional or qualified technicians.
2.
Turn off the UPS. If the load couldn’t be cut off, you should remove the cover of maintenance bypass
switch on the rear panel and turn the maintenance switch to “BPS” position first.
3. Switch off the line input breaker (for dual input unit, also switch off the bypass input breaker), and switch
off the battery breaker (only available for long-run model).
4. Remove the cabinet cover, and disconnect battery wire for standard model. Then modify the jumper of JS3
on the control board to set the battery numbers as following table.
Battery Number in
series
J3
pin1 & pin2
pin3 & pin4
Pin5 & pin6
pin7 & pin8
18
1
0
0
X
19
0
1
0
X
20
0
0
1
X
5.
Modify the battery pack for the setting number carefully. After complete it, put the cover back, switch on
the battery breaker for long-run model.
6. Switch on the line input breaker (for dual input unit, also switch on the bypass input breaker) and the UPS
will enter Bypass mode. If the UPS is in maintenance Bypass mode, turn the maintenance switch to “UPS”
position and then turn on the UPS.
Parallel Operation
Parallel system initial startup
First of all, please make sure all of the UPSs are parallel models and have the same configuration.
1.
Turn on each UPS to AC mode respectively (Refer to section 3-4(1)). Then, measure the inverter output
voltage of each phase for each UPS to check if the inverter voltage difference between actual output and
setting value is less than 1.5V (typical 1V) with multimeter. If the difference is more than 1.5V, please cali-
brate the voltage by configuring inverter voltage adjustment in LCD setting. If voltage difference remains
more than 1.5V after calibration, please contact your local distributor or service center for help.
