York YCAS0130, Installation, Operation & Maintenance Manual, Page: 163 / 204

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YORK INTERNATIONAL
FORM 201.19-NM1 (204)
“0” for times before 10 o’clock. e.g. 08:31. The cursor
will then advance to the AM/PM designation. If neces-
sary press the or key to change to the opposite
time pe ri od.
Next, key in the day of the month (the cursor will au-
to mat i cal ly skip from AM/PM to the
fi rst digit of the
date when a “number key” is pressed). The cursor will
then skip to the
fi rst digit of the year. Key in the year.
Al ways use two digits for the day and the year, using a
leading “0” for days 1-9 e.g. 02 FEB 03. Finally, change
the month as needed by repetitively pressing the or
key until the proper month appears. Once the desired
information is keyed in, it must be stored into memory
by pressing the Enter key.
Any valid time or date will be accepted. If an out of
range value is entered, the following message will be
displayed for 3 seconds then revert back to the Set Time
display message for reprogramming:
Pressing the Set Time key once, enters
the “pro gram ming” mode in which
the dis played time does not update.
Press ing the Set Time key a second
time enters “display” mode in which
the cursor will dis ap pear and the “live”
clock will be dis played.
7. CLOCK KEYS
O U T O F R A N G E -
T R Y A G A I N !
7.1 GENERAL
The microprocessor features a continuously running in-
ter nal Clock and calendar and can display actual time as
well as the day of the week and the date. An au to mat ic
schedule feature is provided for starting and stop ping
the chiller on individual days of the week, elim i nat ing
the need for an external time clock. Also pro vid ed are
a Holiday feature, allowing special start/stop times to
be set for designated holidays, and a Manual Over ride
feature to aid servicing. If the automatic sched ule feature
is not required, the micro can be pro grammed to run the
chiller on demand as long as the Chiller ON/OFF and
System switches are in the ON position.
Programming of the internal clock/calendar and op er -
at ing schedule are described below.
7.2 SET TIME KEY
When the Set Time key is pressed, a message showing
the day, time and date will be displayed with the cursor
below the
fi rst digit of the time as shown:
First press the or key until the proper day appears.
Press ENTER to move on to the hour part of the display.
Next, key in the time (hours/minutes) using a leading
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