Operation – American Power Conversion SMARTUPS 450 User Manual
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English
5. Operation
5.1 Switch On
With the unit plugged in, press the on/test (upper) button to supply power to the loads. The loads
are immediately powered while the unit beeps and performs a self-test. See section 5.3.
5.2 Switch Off
To switch off the unit’s output power, press the off (lower) button. It may be convenient to use the
on and off buttons of the unit as a master on/off switch for the protected equipment.
Note: The unit is on (the internal processor is operating) whenever it is plugged in and utility voltage
is present. Even when switched off the unit maintains the battery charge and will respond to com-
mands received through the computer interface port and the accessory slot.
5.3 Self-test
Use the self-test to verify both the operation of the unit and the condition of the battery. With the
unit plugged in to normal utility power, activate the self-test by pressing the on/test button until the
unit beeps and the on-line LED flashes.
Note: By default the unit performs a self-test at power up and once every two weeks.