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26 YORK INTERNATIONAL
has increased to 265 PSIG (R-22); 180 PSIG (R-134a).
System will be allowed to restart when pressure de-
creases to 205 PSIG (R-22); 120 PSIG (R-134a). Pres-
sure is sensed by a High Pressure (HP) safety control
that is located on a mounting bracket above the oil-
pump starter located on the condenser. This message
is prompted by the opening of the HP safety control
contacts. To restart chiller, press COMPRESSOR
switch to the STOP/RESET position and then to the
START position.
MON XX:XX AM – EVAP TRANS OR PROBE ERROR
The chiller is shut down because the leaving chilled
water temperature minus the evaporator saturation tem-
perature is outside the range of –2.5°F to +25°F con-
tinuously for 10 minutes. To restart the chiller, press
COMPRESSOR switch to STOP/RESET switch to
STOP/RESET position and then to START position. On
Brine applications (program jumper JP3 removed), this
check is not performed when the evaporator transducer
is reading a pressure below its “out-of-range” thresh-
old.
On Steam Turbine applications (Micro Board program
jumper JP4 removed), with EPROM version C.02F
(T).12 or later, this check is bypassed for the first 20
minutes of chiller run time and then performed at the
regular 10 minute intervals thereafter. This is to allow
for the additional time required to decrease the evapo-
rator pressure due to the longer acceleration time of
the steam turbine.
MON XX:XX AM – MOTOR CONTROLLER – EXT. RESET
The chiller is shut down because a current module
(CM-2 Electro-Mechanical starter application), or the
YORK Solid State Starter or the Variable Speed Drive
initiated a shutdown. To restart system, reset the ex-
ternal device that caused the shutdown. The chiller will
then automatically restart.
NOTE: The following motor controller shutdowns do
not require an external reset to restart chiller.
Solid State Starter 110°F start inhibit. Anytime the
chiller has been shut down for any reason, this mes-
sage will be displayed until the SCR heatsink tempera-
tures decrease to below 110°F.
MON XX:XX AM – POWER FAULT – AUTOSTART
The chiller is shut down because of a Solid State Starter
or current module (CM-2 Electro-Mechanical starter
application) “Power Fault” shutdown. The chiller will
automatically restart. This function is sensed by the
motor controller input to the digital input board. A power-
fault shutdown is initiated by the motor controller con-
tacts (CM-1) opening and reclosing in one second. If
Solid State Starter application, the shutdown could have
been caused by any of the following reasons. The ap-
propriate light on the Solid State Starter Logic Board
will be illuminated.
• Phase rotation/loss
• Trigger Board out of lock (OOL)
• Power Fault
• Half Phase
MON XX:XX AM – HIGH DISCHARGE TEMP
The chiller is shut down because the discharge tem-
perature has increased to 220°F. The system will be
allowed to restart when the temperature has decreased
to 219°F. Temperature is sensed by a thermistor RT2.
To restart the chiller, press COMPRESSOR switch to
STOP/RESET position and then to the START posi-
tion.
MON XX:XX AM – HIGH OIL TEMP
The chiller is shut down because the oil temperature
has increased to 180°F. The system will be allowed to
restart when the temperature decreases to 179°F. The
temperature is sensed by thermistor RT3. To restart
the chiller, press COMPRESSOR switch to STOP/RE-
SET position and then to the START position.
MON XX:XX AM – OIL PRESSURE TRANSDUCER
The chiller is shut down because the oil pressure has
increased to 125 PSID (during the first 7 minutes of
compressor operation) 60 PSID (after the first minutes
of compressor operation). The chiller will be allowed to
restart when the oil pressure decreases to 59 PSID. To
restart the chiller, press COMPRESSOR switch to
STOP/RESET position and then to the START posi-
tion.
MON XX:XX AM – FAULTY COND PRESSURE XDCR
The chiller is shut down because the condenser trans-
ducer is indicating a pressure of less than 24.2 PSIG
(R-22), 6.8 PSIG (R-134a); or a pressure greater than
300 PSIG (R-22 or R-134a). This is generally indica-
tive of a defective condenser transducer or the trans-
ducer has been disconnected. After the problem has
been corrected, the chiller can be restarted. To restart,
press COMPRESSOR switch to STOP/RESET posi-
tion and then to START position.
MON XX:XX AM – FAULTY OIL PRESSURE XDCR
The chiller is shut down because either the high side
or low side oil pressure transducer was out-of-range
(displaying x’s) while chiller was running. To restart