M&M
R
EFRIGERATION
I
NC
. 2-3
Chapter 2: Keypad Functions
STOP
The red STOP key causes an immediate and orderly shutdown of a compressor. This
key usually has no effect on master panels.
SHIFT
The SHIFT key is used to switch control back and forth from the display area to the hot
keys. This key may also be used to scroll between the horizontal pages of a log screen.
0 – 9
The NUMBER keys select menu or hot key options. On data entry screens the number
keys are used to enter numerical data.
•
The DOT key allows decimal point entry on data entry screens. This key also permits
the user to page forward one full screen at a time on log and status screens.
-
The MINUS key allows negative number entry on data entry screens. This key also per-
mits the user to page back one full screen at a time on log or status screens.
On data entry or menu screens, the UP ARROW key moves the cursor up to the next
item on the screen.
On data entry or menu screens, the DOWN ARROW key moves the cursor down to the
next item on the screen.
On data entry or menu screens, the LEFT ARROW key moves the cursor left to the next
item on the screen. This key also permits the user to page forward one full screen at a
time on log and status screens.
On data entry or menu screens, the RIGHT ARROW key moves the cursor right to the
next item on the screen. This key also permits the user to page back one full screen at
a time on log and status screens.
PG UP
The PG UP key is used to page back one full screen at a time for status screens or to
page up to more current data on log screens.
PG DN
The PG DN key is used to page forward one full screen at a time for status screens or to
page down to older data on log screens.
QUIT
The QUIT key exits the current screen and displays the previous screen. Pressing the
QUIT key to exit from a data entry screen will result all changed data being lost.
SAVE
The SAVE key is used with data entry screens to save any changed information. It also
exits the current screen and displays the previous screen.
CLEAR
The CLEAR key within data entry screens will erase the current number field. On the
main status or alarm status screen it acknowledges and clears alarms and failures.
ENTER
The ENTER key is used within data entry screens on a number field to accept numerical
data or on a selectable field to toggle through the available choices. On menu screens,
the ENTER key will select the highlighted menu item. The ENTER key may also be
used to scroll forward through the status screens.
The CONTRAST keys are used to adjust the display for proper viewing depending on
the ambient light levels. When the desired contrast is achieved, pressing any other key
will lock the current contrast value into memory.
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