Powerware 9 Using Maintenance Bypass

UPS Operation

Using Maintenance Bypass

Use the following procedure to transfer the critical load to Maintenance Bypass (AC Line operation) and remove the UPS:

1.Disconnect the DB-25 serial communications cable from the serial port on the UPS rear panel.

2.Toggle the Bypass switch on the PowerPass to the BYPASS position (see Figure 13 or Figure 14). The PowerPass is now powering your equipment from utility power.

3.Press and hold the Output Off button until the long beep ceases (approximately three seconds). The •indicator remains lit.

4.Switch the circuit breaker on all battery cabinets to the OFF (O) position.

5.Disconnect the battery connector on the UPS rear panel.

6.Using a #2-Phillips screwdriver, loosen the PowerPass mounting screw until it is free (the screw remains captive).

7.Remove the PowerPass from the UPS, being careful not to loosen the power cords plugged into the PowerPass.

Utility Power

Laser Printer

PowerPass UPS Load

Figure 12. PowerPass Block Diagram (AC Line Operation)

Powerware® 9 Prestige Series User’s Guide (600 VA - 1800 VA) : www.powerware.com 41