York YCAS0130 manual Program Key, Micro Panel Contents, High Discharge Pressure Cut-Out

Micro Panel Contents

FORM 201.19-NM1 (204)

8. PROGRAM KEY

8.1GENERAL

The Program key is used to program system operating parameters including cutout points for safeties, antici- patory unload points to avoid faults, and anti-recycle 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 messages are displayed.

D I S P L A Y L A N G U A G E

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 desired 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- grammable value.

29023A

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 program- mable 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 Program Key must be checked and prop- erly programmed when commissioning the chiller. Failure to properly program these values may cause operating prob- lems or damage to the chiller.

8.2 PROGRAM KEY –

USER PROGRAMMABLE VALUES

High Discharge Pressure Cut-Out

D I S C H A R G E P R E S S U R E C U T O U T = 3 9 5 . 0 P S I G

The Discharge Pressure Cutout is a microprocessor backup for the mechanical high pressure cutout located in each refrigerant circuit. This safety is bypassed for the first 5 seconds of operation after which if the cutout point is exceeded for 3 seconds, the system will shut down. Normally, air-cooled chillers, such as YCAS chillers,

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