Specifications

YORK INTERNATIONAL 25
FORM 160.48-O1
rator Pressure (LEP, not included with standard Control
Center) safety contacts have opened. The brine LEP
safety is located external to the Control Center. Safety
cutout settings will vary with the brine application. To
restart the chiller, wait until the safety contacts close,
press the “COMPRESSOR” switch to the “STOP/RESET”
position and then to the “START” position.
MON XX:XX AM – LOW OIL PRESSURE
The chiller is shut down because the oil pressure has
decreased to 15 PSID while running, or never achieved
20 PSID prior to compressor start during the oil pump
pre-lube run. The chiller will be allowed to restart when
the pressure increases to 20 PSID. Differential pressure
is sensed by two pressure transducers. To restart chiller,
press “COMPRESSOR” switch to “STOP/RESET” posi-
tion and then to the “START” position.
MON XX:XX AM – HIGH PRESSURE
The chiller is shut down because condenser pressure
has increased to 15 PSIG (29.7 PSIA). System will be
allowed to restart when pressure decreases to 9 PSIG
(23.7 PSIA). Pressure 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
near the purge unit. 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/START” position and
then to “START” position. On Brine applications (pro-
gram jumper JP-3 removed), this check is no longer per-
formed when the evaporator transducer is reading a
pressure below its “out-of-range” threshold.
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 Variable Speed Drive initi-
ated a shutdown. To restart system, reset the external
device that caused the shutdown. The chiller will auto-
matically restart.
NOTE: The following motor controller shutdowns do not
require an external reset to restart the chiller.
1. Variable Speed Drive - over-current, repeat trip, over-
temperature.
2. Solid State Starter - power fault, 110°F start inhibit,
phase rotation/loss, out of lock.
3. Current Module - power fault.
MON XX:XX AM – POWER FAULT – AUTOSTART
The chiller is shut down because of a Solid StateStarter
or current module (CM-2 Electro-Mechanical starter
application) “Power Fault” shutdown. The chiller will au-
tomatically 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 contacts
(CM-1) opening and reclosing in one second.
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 al-
lowed 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 a thermistor RT3. To restart
the chiller, press “COMPRESSOR” switch to “STOP/
RESET” position and then to the “START” position.
MON XX:XX AM – OIL PRESSURE TRANSDUCER
Chiller is shut down because to oil pressure has in-
creased to 60 PSID. The chiller will be allowed to restart
when the oil pressure decreases to 59 PSID. Pressure
is sensed by two oil-pressure transducers that are sens-
ing low and high sump pressure. This safety shutdown
is provided primarily as a check on the oil pressure trans-
ducers. Display of this message is generally indicative
of a defective transducer or interface. To restart the
chiller, press “COMPRESSOR ” switch to “STOP/RESET”
position and then to the “START” position.
VANE MOTOR SWITCH OPEN
Chiller is shut down because a system-start sequence
has been initiated, but the prerotation vanes are not fully
closed.
MON XX:XX AM – STARTER MALFUNCTION DETECTED
The chiller is shut down because the Control Center
has detected a motor-current value greater than 15%