Mon Xx:xx Am - High Line Voltage Message; Mon Xx:xx Am - Low Oil Temp Diff - Autostart Message; Day - Time - Oil Pressure Xdcr Error Message; Mon Xx:xx Am - Prox Sensor Safety Shutdown Message - York Millennium YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4 Operating & Maintenance Manual

or failed to achieve the minimum required starting line-
voltage. Refer to explanation under "System Setpoints
– SSS Motor Current/Volts", page 11. The system will
automatically restart when all phases of line voltage
increase to the minimum required starting voltage.
–
MON XX:XX AM HIGH LINE VOLTAGE
(Solid State Starter applications only)
Chiller is shut down because the voltage in any phase
of line voltage has increased above the over-voltage
threshold for 20 consecutive seconds. Refer to expla-
nation under "System Setpoints – SSS Motor Current/
Volts", page 11. The system will automatically restart
when all phases of line voltage decrease to the maxi-
mum allowable line voltage to start the chiller.
MON 09:30 AM – LOW OIL TEMPERATURE – AUTOSTART
The chiller is running and the oil temperature (as indi-
cated by thermistor RT3) falls below 55°F, the chiller
will shut down and display this message. The chiller
will automatically restart when the oil temperature in-
creases to >71°F AND is greater than the condenser
saturated temperature by 20°F or 30°F depending upon
how long the chiller was shut down. Refer to the mes-
sage "
MON XX:XX AM LOW OIL TEMP DIFF – AUTOSTART
MON XX:XX AM – LOW OIL TEMP DIFF – AUTOSTART
Indicates the chiller is shut down for one of the follow-
ing reasons:
1. The chiller has been shut down for 30 minutes or
less and the oil temperature minus the condenser
saturation temperature is less than 30°F.
– or –
2. The chiller has been shut down for more than 30
minutes and the oil temperature minus the con-
denser saturation temperature is less than 40°F.
– or –
3. Following a power failure, the oil temperature mi-
nus the condenser saturation temperature is less
than 40°F.
The chiller will restart automatically after the condition
clears if the COMPRESSOR switch is in the RUN po-
sition.
NOTE: This check is made only when the chiller is
shut down. It is not checked when the chiller is
running or in "Start Sequence Initiated".
28
DAY – TIME – OIL PRESSURE XDCR ERROR
Indicates the chiller has shut down because the differ-
ence between the High Side Oil Pressure Transducer
Output and the Low Side Transducer Output was greater
than 15.0 PSID during the "Transducer Auto-Zeroing
Sequence" that occurs 10 seconds after a chiller start
is initiated. Message is displayed immediately after the
Auto-Zeroing sequence has completed. This indicates
that one of the transduce outputs is incorrect, possibly
due to an incorrect or defective transducer. To restart
the chiller, press COMPRESSOR switch to STOP/
RESET position and then to START position.
MON XX:XX AM – FAULTY DISCHARGE TEMP SENSOR
Whenever the discharge temperature falls below 30°F,
or the discharge temperature sensor is disconnected
from the Micro Board, the preceding message will ap-
pear. To restart the system when the discharge tem-
perature rises or the sensor has been connected, press
the COMPRESSOR switch to the STOP/RESET posi-
tion and then to the START position.
MON XX:XX AM – PROX SENSOR SAFETY SHUTDOWN
".
The chiller is shut down because the "Proximity/Tem-
perature Sensor" has detected that the distance be-
tween the compressor high speed thrust collar and the
sensor probe has increased
20 mils (25 mils with EPROM version C.02F(T).12 or
later) from the "Reference Position".
NOTE: With EPROM version C.02F (T).11, if the ref-
erence position is < 42 mils, the minimum al-
lowed distance is 22 mils. With EPROM ver-
sion C.02F(T).12 or later, if the reference posi-
tion is < 44 mils, the minimum allowed distance
is 19 mils.
IMPORTANT: If the chiller has shut down displaying
this message, it cannot be restarted until a qualified
service technician performs a visual inspection of the
high speed thrust bearing and performs a special reset
procedure. This special reset procedure is detailed in
YORK Service manual, Form 160.49-M3. Failure to
perform the visual inspection prior to restarting the
chiller could result in severe compressor damage!!!
DAY – TIME – FAULTY PROXIMITY PROBE
The chiller has shut down because the "Proximity/Tem-
perature Sensor" has detected that the distance be-
tween the compressor high speed thrust collar and the
sensor probe has decreased to
10 mils or decreased >
17 mils.
YORK INTERNATIONAL