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Xtreme Power Conversion Corporation
M90U-80 & 140 User’s Manual
Page 30
Uninterruptible Power Supply
Figure 3-8 : Shutdown Mode Diagram
3.2.7 Maintenance bypass Mode
A manual bypass switch is available to ensure continuity of supply to the critical load when the UPS becomes
unavailable e.g. during a maintenance procedure. Before entering the maintenance bypass mode, make sure the
bypass power source is normal
Figure 3-9 : Maintenance Bypass Mode Diagram
3.3 UPS Operation
• Do not start the UPS until the installation is complete.
• Make sure the wiring is correct and the power cables are properly connected.
• Make sure the Power Modules’ addresses have been configured. Refer to the Power Module ID Assistance
section.
• Make sure the ready switch on the Power Module has been moved to the “Locked” position.
• Make sure all the breakers are switched OFF.
3.3.1 AC Startup
Follow this procedure when turning on the UPS from a fully powered-down condition.