Parallel Operation - Liebert Adapt BX 6K User Manual

buzzer is muted, the buzzer will beep again.
2) Some warning alarms can't be muted unless the error is fixed. Please refer to section 3-3 for the
details.
10. 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 fault code from LCD panel. Please check the trouble
shooting table in chapter 4 for details.
2) Some warning alarms can't be muted unless the error is fixed. Please refer to section 3-3 for the
details.
11. 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 in
chapter 4 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.
12. 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 input breaker, and switch off the battery breaker (only available for long-run model).
4) Remove the cabinet, and then modify the jumper on the control board to set the battery numbers (refer
to NOTE below). Then disconnect battery wire for standard model and modify the battery pack
carefully. After complete the changes, put the cabinet back.
NOTE: JP1 setting on the control board: please shorts the Pin5 & Pin6 and Pin7 & Pin8 for 20 pcs batteries;
shorts the Pin5 & Pin6 or Pin7 & Pin8 for 19 pcs batteries; and keeps every pin open for 18 pcs batteries.
It's also necessary to adjust output voltage on charger. Please refer to setting SOP for battery numbers.
5) Switch on the 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.

3-5. Parallel Operation

1. Parallel system connection
1) Make sure all of the UPSs are parallel models, and follow the wiring refer to section 2-4.
2) Turn off the input and output breakers of each UPS, and turn off the battery breaker if the UPS is
long-run model.
3) Turn on the input breaker of the each UPS and measure the voltage difference between the output
line1 of each UPS with multimeter. If the voltage difference is less than 1V, it means all connections
are correct. If the difference is larger than 1V, check if the wirings are connected correctly.
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