York MILLENNIUM YCAS, Installation Operation & Maintenance

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132 YORK INTERNATIONAL
Next, key in the day of the month (the cursor will auto-
matically skip from AM/PM to the first digit of the date
when a “number key” is pressed). The cursor will then
skip to the first 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 99. Finally, change
the month as needed by repetitively pressing the
á á á á á
or
â â â â â
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 "programming" mode in which
the displayed time does not update.
Pressing the Set Time key a second
time enters "display" mode in which
the cursor will disappear and the
“live” clock will be displayed.
7.3 SET SCHEDULE / HOLIDAY KEY
Messages showing each week day and the holiday start/
stop schedule, as shown below, can be displayed using
the Set Schedule / Holiday key:
7. CLOCK KEYS
7.1 GENERAL
The microprocessor features a continuously running in-
ternal Clock and calendar and can display actual time
as well as the day of the week and the date. An auto-
matic schedule feature is provided for starting and stop-
ping the chiller on individual days of the week, eliminat-
ing the need for an external time clock. Also provided
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 schedule
feature is not required, the micro can be programmed 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 operat-
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 first digit of the time as shown:
First press the
á á
á á
á
or
â â
â â
â
key until the proper day appears.
Press ENTER to move on to the hour part of the dis-
play. Next, key in the time (hours/minutes) using a lead-
ing “0” for times before 10 o’clock. e.g. 08:31. The
cursor will then advance to the AM/PM designation. If
necessary press the
á á
á á
á
or
â â
â â
â
key to change to the oppo-
site time period.
29023A
O U T O F R A N G E -
T R Y A G A I N !
T O D A Y I S M O N 1 1 . 1 2 A M
1 9 F E B 1 9 9 9
CLOCK
KEY
Micropanel