York YCAZ33BA3, Руководство пользователя, Страница: 38 / 88

YORK INTERNATIONAL
38
GENERAL
The “CLOCK” is an internal system feature that allows
the microprocessor to continuously monitor the time of
the day. The micro will display actual time as well as
the day of the week and the date when programmed.
This feature allows the microprocessor to provide an
internal automatic time clock feature for starting and
stopping the chiller for each individual day of the week.
Also provided is a “HOLIDAY” feature which allows
special start/stop programming for designated holidays.
The internal clock and schedule programming elimi-
nates the need for an external time clock. Automatic
chiller start and stop will occur according to the pro-
grammed schedule.
If the user desires not to utilize the schedule feature,
the SET SCHEDULE/HOLIDAY can be programmed
to run the chiller on demand as long as the “UNIT” and
“SYS” switches are ON.
Typical display messages will be shown which apply to
each key.
PROGRAMMING THE DAY, TIME AND DATE
Set Time
A message showing the day, time, and date will be dis-
played when the SET TIME key is pressed.
To program the day, time and date, first press the AD-
VANCE DAY key until the appropriate day of the week
is displayed. The day will advance each time the key is
pressed.
The cursor will already be below the first digit of the
time. Key in the new time, if required. Be sure to key in
a “0” before the other digits for times before 10 o’clock.,
i.e. 08:01.
After the time is keyed in, the cursor will advance to
the AM/PM designation. To reprogram, press the AM/
PM key. When the key is pressed, the display will
change to the opposite time period. If no change is
required, begin keying in the required date (the cursor
will automatically skip to the first digit of the date [month]
when a “number key” is pressed and the number will
be placed in the first position).
NOTE: The AM/PM key can only be pressed once. If
an error is made, press the CANCEL key and
begin again.
The date may be keyed in after AM/PM. The sequence
of the message display is month, day, and year. Two
digits must be entered for each of these items. There-
fore, a leading “0” may be required.
26572A
“CLOCK” KEYS
PROGRAMMING THE SYSTEM CLOCK AND
DAILY START/STOP SCHEDULE
T O D A Y I S S U N 1 1 : 1 2 A M
0 2 / 1 4 / 9 1
SET
TIME
“CLOCK”
KEYS