York YK M3 M3 G4 operation manual MON Xxxx AM Evap Trans or Probe Error

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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

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YORK INTERNATIONAL

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Contents Centrifugal Liquid Chillers With Microcomputer Control CenterTable of Contents Nomenclature System Operation Description See Fig SectionDescription of System and Fundamentals of Operation Detail a Compressor Prerotation Vanes Capacity ControlSection Microcomputer Control Center Microcomputer Control Center and KeypadIntroduction Condenser Refrigerant LevelDisplaying System Parameters Control CenterOperation Psid = HOP LP Offset Pressure To Display Chilled Liquid TemperaturesTo Display OIL Pressure System Setpoints To Display Motor CurrentTo Display Operating Hours and Starts Counter See Programming System Setpoints, Displaying System Setpoints To Display Undervoltage setpoints Microcomputer Control Center Press Access Code keyProgramming 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 Therefore Function Jumper PositionThen MON Xxxx AM High Line Voltage MON Xxxx AM High Speed Drain Temp OIL Heaters Checking the OIL Level in the OIL System Operating ProceduresSTART-UP Procedure ReservoirSTART-UP Chiller OperationCondenser Water Temperature Control Chiller Starting Sequence & Shutdown SequenceChecking Operation EcwtLchwt Operating LOG SheetWeekly Operating Inspections See SectionDaily QuarterlySafety Shutdowns Need for Maintenance or ServiceNormal and Safety System Shutdowns Cycling ShutdownsProlonged Shutdown START-UP After Prolonged ShutdownSystem Components Description System ComponentsCompressor Lubrication System See Fig GeneralCompressor Speed Increasing GearsSchematic Drawing YK Compressor Lubrication System Heat Exchangers OIL HeaterMotor Driveline Refrigerant Flow ControlVariable Speed Drive Optional Microcomputer Control Center See SectionSolid State Starter Optional Changing the Dehydrator Operational MaintenanceOIL Return System OIL Charging Procedure OIL ChargeTroubleshooting RiseLEP Operating Setpoints System After Service Symptom High Cooler Pressure Operating Analysis ChartSymptom Abnormally LOW Suction Pressure Symptom no OIL Pressure When System Start Button PushedSymptom Reduced OIL Pump Capacity Symptom OIL Pump Vibrates or is NoisySymptom OIL Pump Fails to Deliver OIL Pressure OIL Pressure display keyConducting R-22 Pressure Test MaintenanceLeak Testing During Operation Vacuum Testing System PressuresVacuum Dehydration OperationRefrigerant Charge Refrigerant ChargingChecking the Refrigerant Charge During Unit Shutdown 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 ControlsCompressor Motor Preventive MaintenancePressure Testing 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.

Another notable aspect of the YK M3 M3 G4 is its robust refrigeration technology. Utilizing high-efficiency scroll compressors, these chillers deliver impressive cooling capacities while maintaining high energy efficiency ratings. Integrated with low GWP (Global Warming Potential) refrigerants, they meet modern environmental standards, ensuring compliance with regulations while promoting sustainability.

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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