Xtreme Power Conversion Corporation
E91 User’s Manual
Page 44
Uninterruptible Power Supply
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 3-4 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
Section 3-3-6 for details.
2) Some warning alarms can’t be muted unless the error is fixed. Please refer to section 3-4 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 Section 3-3-6 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 mode
This operation should only be performed by maintenance personnel or qualified technicians.
When the UPS needs repair or service and the load could not be shut off, the UPS needs to be put into
maintenance mode.
1) First, turn off UPS from the touch panel or press the power button.
2) Then, remove the cover of maintenance bypass switch on the panel.
3) Turn the maintenance switch to “BPS” position.