Powerware FE/QFE UPS manual U T I O N

C A U T I O N

When AC input voltage is present, the UPS system can provide output voltage even though its batteries are disconnected. To confirm that there is no UPS output voltage, always disconnect the AC input source; if the UPS has one or more separate battery cabinets, open the DC disconnect switch on each battery cabinet or disconnect the battery cabinet from the UPS.

hd UPSs with no bypass switch: Turn off the protected equipment. Continue to Step 2.

If you need to use the equipment while the UPS is off, plug the equipment into standard wall outlets and restart the equipment.

UPSs with a Break-Before-Make (BBM) bypass switch (see the label on the side of the switch): Shut down the protected equipment. Turn the bypass switch to the LINE position. Continue to Step 2.

If you need to use the equipment while the UPS is off, restart the equipment. The equipment receives direct AC line instead of conditioned power from the UPS.

UPSs with a Make-Before-Break (MBB) bypass switch (see the label on the side of the switch): Verify that the AC LINE indicator is on, the BATTERY POWER indicator is off, and the UPS is providing output. If all three of these conditions are present, turn the bypass switch to the LINE position. Your equipment receives direct AC line instead of conditioned power from the UPS. Continue to Step 2.

If all three of these conditions are not present, follow Steps 2–4 before you turn the bypass switch to the LINE position. This causes a break in power to your equipment between shutting down the UPS and turning the bypass switch to the LINE position.

C A U T I O N

Equipment can be damaged if you change the switch position when line is applied and the UPS is off or on battery! Refer to TIP 410.

id Turn the UPS ON/OFF switch to the OFF position.

ld If the UPS is plugged in, unplug it. For hardwired models, turn the AC line disconnect switch to the OFF position.

36 Powerware® FERRUPS FE/QFE UPS (500 VA–18 kVA) User’s Guide : Rev A www.powerware.com