Emerson AC4 User Manual

This section describes two features that are available in the Service Terminal Interface:

• Silence Alarm
• Backup Log Files

The Silence Alarm menu item allows you to silence the audible alarm and reset the Common Alarm 

Relay output if the common alarm is configured to reset with silence.
This menu item is available only through the Service Terminal Interface.

To silence the alarm remotely through the Service Terminal Interface:

• Connect to the Liebert AC4 either from a remote computer or through the RS232 port (see 

• At the Main Menu, enter 6 (Silence Alarm).
• At the Silence Alarm menu, shown below, enter 1 to silence the audible alarm immediately. (To 

exit without silencing the alarm, enter 2 or press the Escape key.)

• A confirmation message appears: “Alarm has been silenced.”

NOTE
An alarm may also be silenced by pressing any key on the LCD keypad on the front of the 

SILENCE ALARM

Silence alarm and reset
common alarm relay if
common alarm relay is
configured to reset with
silence alarm

1=SILENCE ALARM
2=RETURN TO MAIN MENU

SELECT A NUMBER:1

>ALARM HAS BEEN SILENCED