York YCAS0130 manual Clock Keys, 163

FORM 201.19-NM1 (204)

7. CLOCK KEYS

8

7.1GENERAL

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 automatic schedule feature is provided for starting and stopping the chiller on individual days of the week, eliminating 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 Override 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 oper- ating schedule are described below.

7.2SET 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:

T O D A Y	I S M O N 1 1		. 1 2 A M
	1 9	F E B 2 0 0	3
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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“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 period.

Next, key in the day of the month (the cursor will au- tomatically 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. Always 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:

O U T O F R A N G E -

T R Y A G A I N !

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.

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