IBM 500 User Manual page 15

This section contains information on the controls for the UPS 500 option.
Figure 1-3. UPS 500 controls
1 INV ON/INV OFF Button: This button controls your UPS's inverter, and
v
has three functions:
– Toggle UPS Protection OFF/ON: While the UPS is connected to utility
power, press and hold this button until you hear a beep in order to turn
UPS protection OFF (or ON again). If UPS protection is OFF, the UPS will
only provide power at its outlets while it is receiving utility power: it will
not provide power from battery reserves during a blackout. When you
turn UPS protection OFF, the Line LED will flash until UPS protection is
turned ON again.
– Shut Down: To turn your UPS completely OFF, first disconnect connected
equipment, then unplug the UPS from ac power, then hold this button
down until you hear a beep. You may also shut the UPS down by holding
this button down until you hear a beep while the UPS is providing
battery backup power.
– Cold Start: If your UPS's batteries are charged, you may cold start the
UPS to use it as a stand-alone power supply in the absence of ac power.
To do so, press this button until you hear a beep.
Installation and user's guide
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