Liebert Autochangeover Controllers AC4 用户手册

The Setup System Info options allow users to:

• Change Password—used for access to system setup functions
• Set Date & Time/Automatic Daylight Saving Time—used to set the AC4’s date and time and 

to enable automatic time change for Daylight Saving Time

• Setup Site ID—the AC4’s location to differentiate among sites if more than one AC4 is in use
• Backup and Upload Configuration File (Service Terminal Interface only)—permits the 

user to copy the AC4’s configuration settings and to upload the file to the AC4

• Factory Defaults—returns the AC4 to its factory settings
• Perform Firmware Update (Service Terminal Interface only)—changes the AC4’s firmware 

to newest version

To change any Setup System Info features:

• From the Main Menu, use the arrows

↑↓

 to

 

choose System and 

Control, then press Enter

↵

 (see 7.1 - Login for help)

.

• Enter your password at the Login screen.
• From the System and Control Menu, use the arrows

↑↓

 to

 

choose 

Setup System, then press Enter

↵

.

• From the Setup System Menu, shown at right, use the arrows

↑↓

 

to

 

choose Setup System Info and press Enter

↵

.

• Use the following steps to access any of the Setup System Info options.

A password is required to access the AC4’s system and control options, 

as described in 7.1 - Login. The password consists of four characters 

(see Table 12 for valid characters). The default password is AAAA.

To change the password:

• From the Setup System Info Menu, use the arrows

↑↓

 to

 

choose 

Change Password, then press Enter

↵

.

• To change your password:

• Use the arrows

↑↓

 to

 

choose a character.

• Press Enter

↵ 

to advance to the next character position.

• When finished, press Enter

↵

 again.

To reset the password to the factory default of AAAA:

• Locate DIP switch 1 on the unit’s circuit board (see 1.6 - Controller Board Overview) and move 

all switches to the OFF position (down).

• Move the second switch to the ON position, then to the OFF position.
• Move the seventh switch to the ON position, then to the OFF position.
• Move the eighth switch to the ON position, then to the OFF position.

The password should now be AAAA.

SETUP INPUTS
SETUP COMMON ALARM
SETUP ZONES

↑↓

=NEXT

↵

=SELECT

SETUP OUTPUTS

SETUP OPERATION 

SETUP SYSTEM INFO

SET DATE & TIME

↑↓

=NEXT

↵

=SELECT

SETUP SITE ID
FACTORY DEFAULTS

CHANGE PASSWORD

AAAA

↑↓

=SELECT 

↵

=NEXT/END