UPS operations  38 
UPS operations 
Modes of operation 
The UPS has five modes of operation: 
•  Standby mode (on page 38) 
•  Operate mode (on page 38) 
•  Configure mode (on page 39) 
•  Battery mode (on page 39) 
•  Auto-Bypass mode (on page 39) 
 
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 (on page 38). 
To place the UPS in Standby mode, press and hold the Off button until the audible alarm sounds and the 
Utility LED flashes. Power to the load ceases. 
When fault conditions occur in Standby mode, the UPS enters Converter Off mode ("UPS is in Converter 
Off mode" on page 54). 
 
 
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. 
 
For the location of buttons, see "UPS front panel controls (on page 8)." 
For the location of LEDs, see "UPS front panel LED indicators (on page 8)." 
 
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 the UPS is powered up and in Standby mode (on page 38). 
To place the UPS in Operate mode, press the On button. The Utility LED illuminates, indicating that power 
is available at the UPS output receptacles. The UPS acknowledges compliance with a short beep. 
If the UPS is off (no LEDs are illuminated), press the On and Battery Start buttons simultaneously to start the 
UPS on battery power.