User`s manual

5. Operation

5.1 Switch On — Switch Off

With the UPS plugged in, press and release the on/off button to supply power to the loads. The loads are

immediately powered while the UPS performs a self-test. See section 5.2. Press and release the button again

to turn off power to the loads. It may be convenient to use the UPS as a master on/off switch for the pro-

tected equipment.

Note: The UPS is on (the internal processor is operating) whenever it is plugged in and utility voltage is

present. Even when switched off the UPS maintains the battery charge.

5.2 Self-test

The UPS performs a self-test automatically when turned on and every two weeks. Automatic self-test eases

maintenance requirements by eliminating the need for periodic manual self-tests.

During the self-test, the UPS briefly operates the loads on-battery. If the UPS passes the self-test, it returns

to on-line operation.

If the UPS fails the self-test it immediately returns to on-line operation and lights the replace battery LED.

The loads are not affected. Recharge the battery overnight and perform the self-test again. If the replace bat-

tery LED is still on, see section 10 for information on replacing the battery.

It is possible to perform a manual self-test at any time. To start a self-test:

PrPr

essess

ess and

hold hold

hold the on/off button until the UPS beeps twice (about 2 seconds).

eleaseelease

elease the on/off button to start the self-test.

5.3 Shutdown Mode

If there is no utility power present, external devices (e. g., servers) connected to the computer interface can

command the UPS to shut down. This is normally done to preserve battery capacity after the graceful shut-

down of protected PC devices. In shutdown mode the UPS stops supplying power to the load, waiting for

the return of utility power. The UPS alternately illuminates the upper front panel LED indicators in shut-

down mode.