Lenovo 5594-8KX User, Installation And Maintenance Manual page 210

Chapter 11 Troubleshooting
4. Scroll to Redundancy mode (not pictured), press enter
5. Toggle to Unitary so it is highlighted with check mark
6. Press ESC button to exit the menus
Resetting UPS to factory defaults
UPS LCD Control Panel
Steps
1. Press enter button to enter Menu screen
182 6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG