Emerson M820B, M820D ,

UM1M820BNA User Instructions

Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)

Spec No. 1M820DNA (Model M820D)

18 Chapter 2. Operation

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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.



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.