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UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
18 Chapter 2. Operation
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
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.
2.3 Local Keypad and Display Access
2.3.1 Local Menu Navigation Keys and LCD Display
Location and Identification: Refer to Figure 7.
Description: There are four (4) menu navigation keys and an LCD display located on the ACU+
Controller’s front panel. Refer to Table 3 for the function of the menu navigation keys.
Note: When the LCD is lit, if no button is pushed for 8 minutes, the backlight of the LCD display
extinguishes and the ACU+ Controller returns to the Main Screen. Press any key to re-activate the
LCD display.
Key Symbol
Key Name
Function
ESC
Escape
Press this key to go back to a
previous menu or to cancel setting
a parameter.
Press ESC and ENT together to
reset the ACU+ Controller, then
press ENT to accept or ESC to
cancel.
ENT
Enter
Press this key to go forward to the
next menu, to select a parameter
to edit, or to validate a parameter
setting change.
Up
Press or to scroll through
the menus or to change the value
of a parameter.
--
Down
Press any key to silence an audible alarm.
Table 3
Local Menu Navigation Keys
2.3.2 Local Display Menus
Refer to “Chapter 3. Local Display Menus”.
Note: A valid password is required to access menus that allow changing any power system parameter.
Navigating the Menus
To Select a Sub-Menu:
Press the up or down arrow keys to move the cursor up and down the list of sub-menus in the menu
screen (selects the sub-menu), then press ENT to enter the selected sub-menu.
To Enter a Password:
If a password screen opens, a password must be entered to allow the User to make adjustments. To enter
a password, with the cursor at the User Name field (default is “Admin”), press the down arrow key to move
cursor down to the password line. Press ENT. “0” is highlighted. Press the up arrow key once to change
the “0” to”1” (default password is “1”), then press ENT twice. (Note: If you have been assigned a unique
User Name and password, follow this procedure to enter these.)
To Change a Parameter:
Press the up or down arrow keys to move the cursor up and down the list of parameters in the menu
screen (selects the parameter to change), then press ENT to change the selected parameter. The
parameter field highlights. Press the up or down arrow keys to change the parameter value. Press ENT to
confirm the change.