Liebert Autochangeover Controllers AC4 用户手册

The Main Menu offers choices for viewing the status of the AC4, silencing the audible alarm and 

backing up the unit’s log files. It also allows access to the System and Control features, which require 

a password.
The following shows where to find examples of the Main Menu screens:

The View Status features are available to all users. This permits all personnel to check on the status 

of any equipment or location being monitored. These options allow any user to:

• View active alarms
• View the current status of all inputs and outputs
• View data stored in alarm and event logs

Two Main Menu options—Silence Alarm and Backup Log Files—are unique to the Service Terminal 

Interface. As with the View Status options, these features do not require a password:

• Silence Alarm—silence the AC4’s audible alarm and reset the Common Alarm Relay output.
• Backup Log Files—make backup copies of the AC4’s Alarm Log and Event Log and save the 

copies to a computer.

The Setup Menu options require a password. Authorized users may:

• Configure the AC4—this includes setting up digital inputs and outputs and system features such 

as setting the date and time
Two system features—Backup and Upload Configuration File and Firmware Update—are 

unique to the Service Terminal Interface.

• 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

1=VIEW ACTIVE ALARMS

2=VIEW ALARM LOG

3=VIEW EVENT LOG

4=VIEW INPUT STATUS

5=VIEW OUTPUT STATUS

6=SILENCE ALARM

7=BACKUP LOG FILES

0=SETUP SYSTEM-LOGIN REQUIRED