Liebert Autochangeover Controllers AC4 用户手册

The AC4 displays the Opening Screen at startup, as shown in Figure 7.

• If any alarms are active, the Current Alarm screen appears. (Pressing any key on the LCD keypad 

will silence the audible alarm.)

If no alarms are present, the Main Menu appears.

The Main Menu offers access to all functions within the panel. As shown in Table 7, the functions are 

organized into three sections with step-by-step instructions. 

Figure 7 shows an overview of the initial screens available through the LCD interface. For compara-

ble information about the Service Terminal Interface screens, see A.3 - Overview of Menus.

5.0 - View Status Options 

(both LCD and Service 

Terminal Interface)

These features are available to all users. This permits all personnel to check the 

status of any monitored equipment or location. From this menu, any user may:
• View active alarms
• View the current status of digital inputs and outputs
• View data stored in the alarm and event logs

6.0 - Silence Alarm & Backup 

Log Files (Service 

Terminal Interface only)

These features—available via the Service Terminal Interface only—allow users to:
• Silence the audible alarm
• Back up the alarm and event logs

7.0 - System and Control 

Options (some functions 

available via Service 

Terminal Interface only)

These options require a password. Authorized users may:
• Configure the AC4
• Override automatic control of outputs to force an output ON or OFF
• Clear active alarms and delete all records in the alarm and event logs

LIEBERT AC4

DD-MON-YY HR:MM:SS

VX.XXX.X

PRESS

↵

=STATUS/SETUP

VIEW STATUS
SYSTEM AND CONTROL

↑↓

=NEXT

↵

=SELECT

SYSTEM AND CONTROL

↑↓

=NEXT

↵

=SELECT

VIEW STATUS

↑↓

=NEXT

↵

=SELECT

VIEW ACTIVE ALARMS

VIEW ALARM LOG

VIEW EVENT LOG

VIEW INPUT STATUS

VIEW OUTPUT STATUS

SETUP SYSTEM

OVERRIDE OUTPUT

CLEAR ALARMS & LOGS