American Power Conversion 400 user manual Manual operation, Plug loads into UPS, Enable the UPS

4.0 Installation

4.5 Manual operation

If you do not wish to use the UPS’s Auto-on feature (see Sec. 4.4), first verify that Option Switch 4 is in the on (down) position. Next, follow the procedures detailed in Sections 4.5.1 through 4.5.4.

4.5.1 Plug loads into UPS

Plug all equipment to be protected by backup power into the outlets on the rear of the UPS. Make sure that all of the devices you plug into the UPS’s outlets are turned on.

Note: Do not plug laser printers into this UPS. Laser printers can draw a considerable amount of power, which reduces the available backup time and, in some cases, causes the UPS to signal an overload.

4.5.1 Enable the UPS

Turn on the rear-panel UPS Enable switch. The entire system will switch on. The UPS Enable switch can act as the on/off switch for your UPS and computer system.

The UPS performs a brief self-test of its battery and operation. In normal operation, the On Line indicator remains lit after the self test.

Note: If the red Overload indicator lights, the UPS is overloaded. Unplug equipment that does not require backing up, such as a printer, and restart the UPS. If the Replace Battery indicator lights, recharge the UPS over- night and retest.

Note: If you have problems, refer to Section 7.0 for troubleshooting information.

4.6 Check Site Wiring Fault indicator—100, 120 Vac versions only

After you connect the loads to the UPS and turn on the UPS, check the Site Wiring Fault indicator on the UPS’s rear panel.

It will light when the UPS is plugged into an improperly wired wall outlet. Wiring faults detected include missing

ground, hot-neutral polarity reversal, and overloaded neutral circuit.

Note: If the UPS indicates a site wiring fault, a qualified electrician should be summoned to correct the building wiring.

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