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Installation Instructions IM581127000
Spec. No. 581127000 (Model 710NPBA) Issue AB, March 22, 2012
Chapter 5. Installing the Modules and Initially Starting the System Page 105
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
6) With the Settings menu screen displayed, navigate to “Power System” (ENT) /
“General” (ENT) / “24V Over Volt1”. Record the displayed voltage setpoint.
7) Press ENT. Use the up or down arrow keys to adjust the “24V Over Volt1” value
to one volt below the system voltage recorded in step 3). Press ENT.
a) Requirement: An audible alarm sounds. The alarm will be silenced in
Requirement c).
b) Requirement: ACU+ “Critical/Major” alarm indicator goes from off to red.
c) Requirement: Press ESC repeatedly to return to the Main screen. ACU+
displays “Alarm”.
To see the specific alarm, press ENT to display the Main Menu.
Navigate as follows: “Status” (ENT) / “Active Alarm” (ENT).
The Active Alarm screen lists one critical alarm.
Press ENT. “Power System 24V Over Volt1 Critical” is displayed.
d) Requirement: External “Relay 1 Critical Summary Alarm” and “Relay 3 Over
Voltage 1 Alarm” activate.
8) Without readjusting the “24V Over Volt1” setpoint, press the ESC key repeatedly
to return to the Main Menu. Then navigate as follows: Settings (ENT) / “Power
System” (ENT) / “General” (ENT) / “24V Over Volt2”. Record the displayed
voltage setpoint.
9) Press ENT. Use the up or down arrow keys to adjust the “24V Over Volt2” value
to one-half volt below the system voltage recorded in step 3). Press ENT.
a) Requirement: An audible alarm sounds. Alarm will be silenced in
Requirement c).
b) Requirement: ACU+ “Critical/Major” alarm indicator stays red.
c) Requirement: Press ESC repeatedly to return to the Main screen. ACU+
displays “Alarm”.
To see the specific alarm, press ENT to display the Main Menu.
Navigate as follows: “Status” (ENT) / “Active Alarm” (ENT).
The Active Alarm screen lists two critical alarms.
Press ENT. “Power System 24V Over Volt2 Critical” is displayed.
Use arrow keys to scroll through the list of alarms.
“Power System 24V Over Volt1 Critical” is displayed.
d) Requirement: External “Relay 1 Critical Summary Alarm” and “Relay 3 Over
Voltage 1 Alarm” remain active.
10) Press ESC repeatedly to return to the Main Menu. Navigate to “Settings” (ENT)
/ “Power System” (ENT) / “General” (ENT) / “24V Over Volt2”.
11) Press ENT. Use the up or down arrow keys to adjust the “24V Over Volt2”
setting to the value recorded in step 8). Press ENT.
12) Use the up or down arrow keys to scroll up to “24V Over Volt1”.
13) Press ENT. Use the up or down arrow keys to adjust the “24V Over Volt1”
setting to the value recorded in step 6). Press ENT.
a) Requirement: ACU+ “Critical/Major” alarm indicator goes from red to off.
b) Requirement: Press ESC repeatedly to return to the Main screen. ACU+
displays “No Alm”.
c) Requirement: All external alarms deactivate.