FORM 195.26-NM3
YORK INTERNATIONAL
27
GENERAL
The DISPLAY keys allow the user to retrieve system
pressures, system motor currents, outdoor ambient
temperature, compressor running times, number of
compressor starts, and option information on the chiller
package. This data is useful for monitoring chiller op-
eration, diagnosing potential future problems, trouble-
shooting, and commissioning the chiller.
Displayed data will be real-time data displayed on a
“40” character display consisting of 2 lines of 20 char-
acters. The display will update all information at a rate
of about “2” seconds.
When a DISPLAY pushbutton is pressed, the corre-
sponding message will be displayed and will remain on
the display until another pushbutton is pressed.
Display Messages may show characters indicating
“greater than” (>>) or “less than” (<<). These charac-
ters indicate the actual values are greater than or less
than the limit values which are being displayed.
If a message is required to be updated faster than ev-
ery 2 seconds, the appropriate key for the desired dis-
play may be pushed and held. Updating will be at .4
second intervals.
Each of the keys and an example of the typical corre-
sponding display messages will be discussed in the
text which follows.
Spare
The first DISPLAY key labeled SPARE has no func-
tional purpose at this time. The word “SPARE” will be
placed on an adhesive label.
Ambient Temp
The outdoor ambient temperature is displayed when
this pushbutton is pressed.
The minimum limit on the display is “0 DEG F”. The
maximum limit on the display is “133.8 DEG F”.
System 1 Pressures
Oil pressure, suction pressure, and discharge* pres-
sure on System 1 will be displayed when this pushbutton
is pressed.
The minimum limits are:
Oil Pressure: 0 PSID
Suction Pressure: 0 PSIG
Discharge Pressure: 0 PSIG
“DISPLAY” KEYS
*
Discharge Pressure Readout is an option. Without this option, the display will read a fixed value.
SPARE
AMBIENT
TEMP
O U T S I D E A M B I E N T A I R
=
7 5 . 9 D E G F
S Y S # 1 O I L =
7 2 P S I D
S P = 6 0 , D P =
2 2 9 P S I G
26572A(D)
SYSTEM 1
PRESSURES
DISPLAY KEYS
