York YK M3 M3 G4 operation manual Symptom OIL Pump Vibrates or is Noisy, OIL Pressure display key

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TABLE 2 – OPERATING ANALYSIS CHART (Continued)

RESULTS

POSSIBLE CAUSE

REMEDY

6. SYMPTOM: USUALLY HIGH OIL PRESSURE DEVELOPS WHEN OIL PUMP RUNS

Unusually high oil pressure is displayed

High oil pressure. Trans-

Replace low or high oil pressure

when the oil pressure display key is

ducer defective. Relief

transducer. Adjust external relief

pressed when the oil pump is running.

valve is misadjusted.

valve.

 

 

 

7. SYMPTOM: OIL PUMP VIBRATES OR IS NOISY

 

 

 

 

Oil pump vibrates or is extremely noisy

Misalignment of pump or

Correct condition or replace faulty

with some oil pressure when pressing

Mounting bolts loose.

part.

OIL PRESSURE display key.

Bent shaft.

 

 

 

 

Worn pump parts.

 

 

 

 

NOTE: When oil pump is run without

Oil not reaching pump

Check oil supply and oil piping.

an oil supply it will vibrate and

suction inlet in sufficient

 

become extremely noisy.

quantity.

 

 

 

 

8. SYMPTOM: OIL PRESSURE GRADUALLY DECREASES (Noted by Observation of Daily Log Sheets)

Oil pressure (noted when pressing OIL

Oil filter is dirty.

Change oil filter.

PRESSURE display key) drops to 70%

 

 

of oil pressure when compressor was

Extreme bearing wear.

Inspect compressor.

originally started.

 

 

 

 

 

9. SYMPTOM: OIL PRESSURE SYSTEM CEASES TO RETURN AN OIL/REFRIGERANT SAMPLE

Oil refrigerant return not functioning.

Filter-drier in oil return

Replace old filter-drier with new.

system dirty.

 

 

 

Jet or orifice of oil return

Remove jet, inspect for dirt. Remove

jet clogged.

dirt using solvent and replace.

 

 

10. SYMPTOM: OIL PUMP FAILS TO DELIVER OIL PRESSURE

No oil pressure registers when pressing OIL PRESSURE display key when oil pump runs.

Faulty oil pressure transducer

Faulty wiring/connectors.

Replace oil pressure transducer.

11. SYMPTOM: REDUCED OIL PUMP CAPACITY

Oil pump pumping capacity.

Excessive end clearance

Inspect and replace worn parts.

 

pump.

 

 

Other worn pump parts.

 

 

 

 

 

Partially blocked oil supply

Check oil inlet for blockage.

 

inlet.

 

 

 

 

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YORK INTERNATIONAL

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Contents Centrifugal Liquid Chillers With Microcomputer Control CenterTable of Contents Nomenclature Section Description of System and Fundamentals of OperationSystem Operation Description See Fig Detail a Compressor Prerotation Vanes Capacity ControlSection Microcomputer Control Center Microcomputer Control Center and KeypadIntroduction Condenser Refrigerant LevelControl Center OperationDisplaying System Parameters To Display Chilled Liquid Temperatures To Display OIL PressurePsid = HOP LP Offset Pressure To Display Motor Current To Display Operating Hours and Starts CounterSystem 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 Function Jumper Position ThenTherefore 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 ControlMicrocomputer Control Center See Section Solid State Starter OptionalVariable Speed Drive Optional Operational Maintenance OIL Return SystemChanging 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 keyMaintenance Leak Testing During OperationConducting R-22 Pressure Test Vacuum Testing System PressuresVacuum Dehydration OperationRefrigerant Charging Checking the Refrigerant Charge During Unit ShutdownRefrigerant 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

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