Program Key; General - York YCAS Installation Operation & Maintenance

Micro Panel Contents
8.1

GENERAL

The Program key is used to program system op er at ing
parameters including cutout points for safeties, an tic i-
pa to ry unload points to avoid faults, and anti-re cy cle
timer duration.
When the Program key is pressed, the following mes-
sage will be displayed to indicate the display is in the
Program Mode:
P R O G R A M M O D E
Pressing the ENTER Key causes the display to show
the operator the language the control panel mes sages
are displayed.
D I S P L A Y
E N G L I S H
The operator may select 7 display message languages.
The options are English, Spanish, French, Dutch, Italian,
Portuguese, and Chinese. The ! or " keys can be used
to select the de sired language.
Pressing the Enter key repeatedly allows scrolling
through the programmable displays.
As each value is displayed, it may be reprogrammed
using the 12 Entry keys and !" Keys. New values
will be programmed into memory when the Enter key
is pressed and the display will scroll on to the next pro-
gram ma ble value.
178

8. PROGRAM KEY

L A N G U A G E
If an unacceptable value is entered at any stage, the fol-
lowing message is displayed for a few seconds and the
entered value is ignored:
O U T O F R A N G E
T R Y A G A I N !
The following section shows examples of each pro gram -
ma ble value display in the order in which they appear
after pressing the Program key, along with guidance on
programming each parameter.
The programmable values under the
Pro gram Key must be checked and prop-
er ly programmed when com mis sion ing
the chiller. Failure to prop er ly program
these values may cause operating prob-
lems or dam age to the chiller.
8.2 PROGRAM KEY –
USER PROGRAMMABLE VALUES
High Discharge Pressure Cut-Out
D I S C H A R G E
C U T O U T = 3 9 5 . 0
The Discharge Pressure Cutout is a microprocessor
backup for the mechanical high pressure cutout lo cat ed
in each refrigerant circuit. This safety is bypassed for the
fi rst 5 seconds of operation after which if the cut out point
is exceeded for 3 seconds, the system will shut down.
FORM 201.19-NM6 (804)
29023A
P R E S S U R E
P S I G
YORK INTERNATIONAL