York Millennium YDAS 410, Установка, эксплуатация и обслуживание, Страница: 112 / 136

YORK INTERNATIONAL
112
8. PROGRAM KEY
8.1 GENERAL
The Program key is used to program 21 system oper-
ating parameters including cutout points for safeties,
anticipatory unload points to avoid faults, and anti-re-
cycle timer duration.
When the Program key is pressed, the following mes-
sage will be displayed:
Press the Enter key repeatedly to scroll through the pro-
grammable value displays.
As each value is displayed, it may be reprogrammed using
the 12 Entry keys. New values will be programmed into
memory when the Enter key is pressed to scroll and the
display will scroll on to the next programmable value.
Some programmable values are critical to the correct
operation of the chiller and are therefore password pro-
tected. These are identified by the absence of the cur-
sor when the display is viewed. Programmable values
not password protected are identified by the presence
of the cursor under the first digit of the numerical value.
Unprotected values may be keyed in by simply typing a
new value and pressing the Enter key. Failure to press
Enter will cause the new value to be lost.
To reprogram password protected values an access
code must be entered as follows:
When the Program key is first pressed and the above
message is displayed, key in the 4 digit code “7396”
then press Enter.
As the code is being keyed in the digits are not dis-
played but are shown as “*” as shown below:
Pressing the Enter key repeatedly now scrolls through
the programmable values. Access to reprogram all val-
ues indicated by the cursor positioned at the first digit
of the numerical value.
Once accessed, the display will stay in the password
protected mode until a Display, Print, Setpoint, or Clock
key is pressed.
If an unacceptable value is entered at any stage, the
following message is displayed for a few seconds and
the entered value is ignored:
The following section shows examples of each program-
mable value display in the order in which they appear
after pressing the Program key, together with guidance
on programming of each parameter.
NOTE: THE PROGRAMMABLE VALUES UNDER THE
PROGRAM KEY MUST BE CHECKED AND
PROPERLY PROGRAMMED WHEN COM-
P R O G R A M M O D E
P R O G R A M M O D E
* * * *
O U T O F R A N G E
T R Y A G A I N !
28164(B)A
PROGRAM
KEY