Compaq 2000 Series UPS Operation And Reference Manual page 40

3-10 Compaq 2000 Series UPS Operation and Reference Guide
Figure 3-3. Standby mode controls
ON LED
STANDBY button
IMPORTANT:
While in Standby mode, the UPS maintains the charge on the batteries, but no power
is available at the output receptacles.
The UPS remains in Standby mode until an alternate mode is selected, or utility
power is removed.
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