Emerson 115-120 Manuel D’Utilisation

Press the HELP key below the LCD to display the Help window. (Press the HELP key again to exit 

the Help window.)

If there has been no interaction with the Liebert

®

 APM

™

’s LCD for 2 minutes, the screen saver 

window appears. It remains on the LCD for 2 minutes, then the screen will go dark. The LCD will 

become active again when any key is pressed.

Pop-up prompt windows appear when the user must confirm a choice or perform an operation. This 

section describes the pop-up windows. Some operations require entering a password; refer to 9.12.7 - 

Enter Control Password for help.

If the bypass voltage or frequency exceeds the synchronized range and 

utility voltage or frequency is normal, the inverter cannot be in 

synchronization with the bypass, and the output can only transfer to 

inverter after an interruption of about 15ms when the user presses the 

INVERTER ON button. Before transferring, the system will let the 

user confirm whether the interruption can be accepted, as shown at right. If the bypass voltage 

returns to normal before the user makes confirmation, the UPS will transfer to inverter mode 

automatically. At the same time, the prompt window will close.

If the bypass voltage or frequency exceeds the synchronized range and 

the UPS is in inverter mode, the system must let the user to confirm 

and accept the power interruption danger before pressing the 

INVERTER OFF button to shut down the output of the inverter. The 

user can also cancel the shutdown operation, as shown at right. If the 

bypass voltage returns to normal before the user makes the 

confirmation, the UPS will transfer to bypass operation mode automatically, and at the same time the 

prompt window will disappear soon.

Sing le

APM 09 0k VA

0 2 :1 7 : 4 7

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