York YCAS0098EB, Installation Operation & Maintenance, Page: 154 / 184

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JOHNSON CONTROLS
5. ENTRY KEYS
5.1 GENERAL
The Entry keys allow the user to change numerical
values programmed in as chiller setpoints, cutouts,
clock, etc.
5.2 NUMERICAL KEYPAD
The Numerical keypad provides all keys necessary to
program numerical values into the Micro Panel.
The “*” key is used to designate holidays when program-
ming special start/stop times for designated holidays in
the SET SCHEDULE/HOLIDAY program mode.
The “+/-” key allows programming -C setpoints and
cut-outs in the metric display mode.
5.3 ENTER KEY
The Enter key must be pushed after any change is made
to setpoints, cutouts, or system clock. Pressing this key
tells the micro to accept new values into memory. If this
is not done, the new values entered will be lost and the
original values will be returned.
The Enter key is also used to scroll through available
data when using the Program or Set Schedule/Holiday
keys.
5.4 CANCEL KEY
When the Cancel key is pressed, the cursor will always
return to the first character to be programmed in the
display message. This allows the operator to begin re-
programming, if an error is made. When the Cancel key
is pressed, the values already keyed in will be erased
and the original or internally programmed default values
will appear. In other instances the display will remain the
same and the only reaction will be the cursor returning
to the first character.
5.5

KEYS
The

keys allow the user to scroll through data under
the OPER DATA and HISTORY Key and to select the
correct day of the week and the correct month when
programming the micro with the correct time and date.
The

key also operates as a toggle AM/PM key if the
cursor is over “AM” or “PM” on the display. For ex-
ample, pressing the

key when the cursor is on “PM”
changes it to “AM.”
29023A
Micro Panel Contents