York YK M3 M3 G4 operation manual MON Xxxx AM High Line Voltage

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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”.

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 > 10 mils or decreased > 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 ≤ 17 mils.

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YORK INTERNATIONAL

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Contents Centrifugal Liquid Chillers With Microcomputer Control CenterTable of Contents Nomenclature Description of System and Fundamentals of Operation SectionSystem Operation Description See Fig Detail a Compressor Prerotation Vanes Capacity ControlSection Microcomputer Control Center Microcomputer Control Center and KeypadIntroduction Condenser Refrigerant LevelOperation Control CenterDisplaying System Parameters To Display OIL Pressure To Display Chilled Liquid TemperaturesPsid = HOP LP Offset Pressure To Display Operating Hours and Starts Counter To Display Motor CurrentSystem Setpoints See Programming System Setpoints, Displaying System Setpoints To Display Undervoltage setpoints Press Access Code key ProgrammingMicrocomputer Control Center Programming System SetpointsElectro-Mechanical Starter, refer to Fig Solid State Starter, refer to FigKeypad Programming Pull Down Demand Setpoint SetpointKeypad Programming Daily Schedule Setpoint Keypad Programming Holiday Service Keys PRE-ROTATION Vanes KeysOther Service Keys Pulldn Level = XXX% Setp = XXX% Actual = XXX%Operating Modes Compressor Switch Display MessagesSystem RUN Auto Vanes System Shutdown Messages When Control Center is in Remote mode MON Xxxx AM Evap Trans or Probe Error Then Function Jumper PositionTherefore MON Xxxx AM High Line Voltage MON Xxxx AM High Speed Drain Temp System Operating Procedures START-UP ProcedureOIL Heaters Checking the OIL Level in the OIL ReservoirSTART-UP Chiller OperationCondenser Water Temperature Control Chiller Starting Sequence & Shutdown SequenceEcwt LchwtChecking Operation Operating LOG SheetOperating Inspections See Section DailyWeekly QuarterlyNeed for Maintenance or Service Normal and Safety System ShutdownsSafety Shutdowns Cycling ShutdownsProlonged Shutdown START-UP After Prolonged ShutdownSystem Components Description System ComponentsGeneral CompressorCompressor Lubrication System See Fig Speed Increasing GearsSchematic Drawing YK Compressor Lubrication System OIL Heater Motor DrivelineHeat Exchangers Refrigerant Flow ControlSolid State Starter Optional Microcomputer Control Center See SectionVariable Speed Drive Optional OIL Return System Operational MaintenanceChanging the Dehydrator OIL Charging Procedure OIL ChargeTroubleshooting RiseLEP Operating Setpoints System After Service Operating Analysis Chart Symptom Abnormally LOW Suction PressureSymptom High Cooler Pressure Symptom no OIL Pressure When System Start Button PushedSymptom OIL Pump Vibrates or is Noisy Symptom OIL Pump Fails to Deliver OIL PressureSymptom Reduced OIL Pump Capacity OIL Pressure display keyLeak Testing During Operation MaintenanceConducting R-22 Pressure Test Vacuum Testing System PressuresVacuum Dehydration OperationChecking the Refrigerant Charge During Unit Shutdown Refrigerant ChargingRefrigerant Charge Handling Refrigerant for Dismantling and Repairs Megging the MotorMotor Stator Temperature and Insulation Resistances Condensers and Coolers Testing for Cooler and Condenser Tube Leaks Compressor Electrical ControlsPreventive Maintenance Pressure TestingCompressor Motor Cooler and CondenserElectrical Controls ALL Rights Reserved

YK M3 M3 G4 THRU YK S6 S4 J2, YK LB LB G4 THRU YK SE SC J4, YK M3 M3 G4 specifications

The York YK M3 M3 G4, YK M3 M3 G4 THRU YK S6 S4 J2, and YK LB LB G4 THRU YK SE SC J4 represent a sophisticated line of HVAC systems engineered for modern commercial applications. These models are celebrated for their innovative designs, energy efficiency, and advanced features, making them a preferred choice among facility managers and building owners.

One of the standout characteristics of the York YK series is its modular construction, which provides unparalleled flexibility in system configuration. This design allows for easy upgrades and expansions as building demands evolve. The YK M3 series, in particular, is equipped with advanced controls that enhance system performance while minimizing energy consumption. With features like variable speed drives and sophisticated control algorithms, these units optimize airflow and refrigerant use, significantly reducing operational costs.

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The YK LB LB G4 and YK SE SC J4 models further enhance York’s portfolio with their compact designs and lower installation footprints. These chillers are ideal for applications where space is at a premium. Additional features include advanced noise reduction technology, allowing for quieter operation compared to traditional HVAC systems, making them suitable for urban environments or buildings where noise control is a priority.

Furthermore, York's commitment to continuous innovation is evident in the incorporation of smart technology across its chiller series. Features such as connectivity options for monitoring and diagnostics through mobile apps or web interfaces empower users to maintain optimal system performance proactively. This connectivity aids in predictive maintenance, enabling timely interventions that extend equipment life and reliability.

Finally, all these high-efficiency chillers are backed by York's renowned service support network, ensuring that customers have access to expert assistance and maintenance services whenever needed. With their exceptional features, modern technologies, and commitment to sustainability, the York YK M3 M3 G4, YK M3 M3 G4 THRU YK S6 S4 J2, and YK LB LB G4 THRU YK SE SC J4 models stand out as leaders in the commercial HVAC market, setting new standards for performance and efficiency.
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