APC SY10K40F User Manual

Before servicing the UPS, place the UPS in Maintenance Bypass operation. When the UPS is 

operating in Maintenance Bypass operation, power flows directly from the utility to the Maintenance 

Bypass Panel and out of the load equipment.

1. Use the UPS display interface to place the UPS in Maintenance Bypass operation:

a. Press the Esc key on the Monitoring screen to open the Main menu.

b. Select Control on the Main menu and press the Enter key.

c. Select UPS into Bypass on the Control menu and press the Enter key.

d. Confirm the selection on the next screen: Select Yes, UPS into Bypass and press the Enter 

key. The BYPASS LED will illuminate and the display will show the following two screens:

The H3 LED above the Q3 Breaker should then illuminate, indicating that it is safe to 

operate the Q3 breaker.