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Micro Panel Contents
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, elimi-
nating the need for an external time clock. Also pro-
vided 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 sched-
ule 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:
7.2
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:
T O D A Y
I S
M O N
1 9
F E B
á
â
First press the
or
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-
136
7. CLOCK KEYS
1 1 . 1 2 A M
1 9 9 9
ing "0" for times before 10 o'clock. e.g. 08:31. The
cursor will then advance to the AM/PM designation. If
á
â
necessary press the
or
site time period.
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
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. Press-
ing the Set Time key a second time
enters "display" mode in which the
cursor will disappear and the "live"
clock will be displayed.
CLOCK
KEY
29023A
key to change to the oppo-
á
â
or
YORK INTERNATIONAL
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