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7. Turn off the UPS with utility power supply in AC mode
1) Touch “CONTROL” and select “Turn off UPS” icon to turn off the UPS. Refer to “UPS on/off” screen.
NOTE 1: If the UPS has been set to bypass output, it will bypass voltage from the mains 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 in Bypass mode, there
will be 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. The LCD display will turn off and UPS is now completely off.
8. Turn off the UPS without utility power supply in Battery mode
1) Touch “CONTROL” and select “Turn off UPS” icon to turn off the UPS. Refer to “UPS on/off” screen.
2) Then UPS will cut off power to output terminals.
9. Mute the buzzer
1) Touch “SETTING” and select “BASIC” item. There are two events available to mute. Refer to
“SETTING” screen.
2) Some warning alarms can’t be muted unless the error is fixed. Please refer to section 3-3 for details.
10. Operation in warning status
1) When LCD screen shows “Fault Mode” and the buzzer beeps once every second, it indicates that
there are problems for UPS operation. Users can read the warning message(s) from “DATA LOG”
menu. Please refer to the Chapter 4 for details.
2) Some warning alarms can’t be muted unless the error is fixed. Please refer to section 3-3 for details.
11. Operation in Fault mode
1) When the buzzer beeps continuously, it means that there is a fatal error with the UPS. Users can
get the fault code from “DATA LOG” menu. Please refer to the Chapter 4 for details.
2) Please check the loads, wiring, ventilation, mains, battery and so on after the fault occurs. Don’t try
to turn on the UPS again before solving the issues. If the problems persist, contact the distributor or
service personnel immediately.
3) In case of an emergency, shut off connections from mains, external battery, and output immediately
to avoid possible damage to the UPS or equipment.
12. Operation in maintenance bypass mode
This operation should only be performed by maintenance personnel or qualified technicians.
When the UPS needs to repair or service and the load could not be shut off, the UPS needs to be put into
maintenance mode.
1) First, switch off the UPS.
2) Then, remove the cover of maintenance bypass switch on the panel.
3) Turn the maintenance switch to “BPS” position.
3-5. Parallel Operation
1. Parallel system initial startup
Please make sure that all of the running UPSs are parallel models and have the same configuration.
1) Turn on each UPS in AC mode respectively (Refer to section 3-4(1)). Then, measure the inverter
output voltage of each phase for each UPS with a multi-meter. Calibrate the inverter output voltage
by configuring inverter voltage adjustment (Refer to SETTING
ADVANCE
SYS PARAMETERS
VOL CALI screen) in LCD menu until the inverter output voltage difference of each UPS is within 1V
or less.
2) Turn off each UPS (Refer to section 3-4(7.)). Then, follow the wiring procedure in section 2-4.
3) Remove the cover of parallel share current cable port on the UPS, connect each UPS one by one
with the parallel cable and share current cable, and then replace the cover.
