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UPS operations 23
UPS operations
Modes of operation
The UPS has three modes of operation:
• Standby mode (on page 23)
• Operate mode (on page 23)
• Battery mode (on page 24)
Standby mode
In Standby mode:
• No power is available at the UPS output receptacles.
• The UPS charges the batteries as necessary.
The UPS can be placed in Standby mode when the UPS is in Operate mode (the Power On LED ("UPS
front panel LED indicators" on page 8) is illuminated).
To place the UPS in Standby mode, press and hold the Power On/Standby button ("UPS front panel
controls" on page 7) until the audible alarm sounds. The Power On LED turns off and power to the load
ceases.
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 until utility power is removed.
Operate mode
In Operate mode:
• Power is available at the UPS receptacles.
• The UPS charges the batteries as necessary.
The UPS can be placed in Operate mode if either of the following conditions applies:
• The UPS is powered up and in Standby mode (on page 23).
• The UPS is powered down and no utility power is available.
To place the UPS in Operate mode, press and hold the Power On/Standby button ("UPS front panel
controls" on page 7) until the UPS acknowledges compliance with a short beep. The Power On, Load 1
and Load 2 LEDs ("UPS front panel LED indicators" on page 8) illuminate, indicating that power is
available at the UPS output receptacles.