York YK M3 M3 G4 operation manual Troubleshooting, Rise

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YORK INTERNATIONAL

TABLE 1 – CAUSES OF NORMAL AND SAFETY SYSTEM SHUTDOWNS IN ACCORDANCE WITH THE MICROCOMPUTER CONTROL, CENTER DISPLAY

 

SHUTDOWN CAUSE

 

GOVERNING CONTROL FUNCTION

 

 

 

 

CONTROL CENTER DISPLAY

 

 

 

 

 

 

 

 

 

PROGRAMMED

START-UP OF

PROBABLE CAUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPERATING

 

 

 

 

 

 

SETPOINTS

SYSTEM AFTER

AND SERVICE

DAY OF

TIME OF

CAUSE OF

 

METHOD OF

 

POINT

 

DESCRIPTION

BY OPERATOR

SHUTDOWN

REQUIRED

WEEK

DAY

SHUTDOWN

 

RESTART

ON

ON

 

 

 

 

 

 

 

 

 

 

 

RISE

FALL

 

 

 

MON.

10:00 AM

Low Water

 

Autostart

Low Water

Chilled

4°F below

4°F below chilled

Automatic Restart

System load is less

 

 

Temp.

 

 

(LWT)

water

chiller

water setpoint

when water reaches

than minimum

 

 

 

 

 

 

setpoint

water

(If set to 40°F

setpoint; if system

capacity

 

 

 

 

 

 

 

setpoint

would be 36°F)

is running and set-

 

 

 

 

 

 

 

 

 

(36°F minimum

point is increased

 

 

 

 

 

 

 

 

 

 

4°F, system will

 

 

 

 

 

 

 

 

 

 

continue to run, as

 

 

 

 

 

 

 

 

 

 

LWT cutout shifts

 

 

 

 

 

 

 

 

 

 

to a fixed 36°F for

 

 

 

 

 

 

 

 

 

 

10 minutes.

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Flow Switch

 

Autostart

Flow Switch

 

 

 

Automatic Restart

Lack of water flow.

 

 

 

 

 

 

 

 

 

when water flow is

Check operation of

 

 

 

 

 

 

 

 

 

Restored to close

chilled water pump

 

 

 

 

 

 

 

 

 

flow switch.

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

System

 

Autostart

A remote com-

 

 

 

Automatic Restart

Contact-connected to

 

 

Cycling

 

 

mand (computer

 

 

 

upon remote

the Remote/Local

 

 

 

 

 

relay contact or

 

 

 

command.

cycling input of the

 

 

 

 

 

manual switch)

 

 

 

 

Digital input board

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Multi-Unit

 

Autostart

(Optional) Lead-

 

 

 

Automatic Restart

Contact-connected to

 

 

 

 

 

Lag Sequence

 

 

 

upon remote

the Multi-Unit cycling

 

 

 

 

 

Control

 

 

 

command.

input of the Digital

 

 

 

 

 

 

 

 

 

 

input board

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

Internal

 

Autostart

Internal Clock

 

 

Daily Schedule

Will automatically

Pressing Compressor

 

 

Clock

 

 

 

 

 

Programmed to

restart when pro-

Start Switch over-

 

 

 

 

 

 

 

 

Shutdown Unit

grammed schedule

rides the program

 

 

 

 

 

 

 

 

 

permits

 

 

 

 

 

 

 

 

 

 

 

 

MON.

10:00 AM

AC under-

 

Autostart

<15% FLA for

 

 

 

 

Cycling shutdown oc-

 

 

voltage

 

 

25 continuous

 

 

 

 

curs when motor cur-

 

 

 

 

 

seconds

 

 

 

 

rent is >15% FLA for

 

 

 

 

 

 

 

 

 

 

25 seconds during

 

 

 

 

 

 

 

 

 

 

chiller operation

MON.

10:00 AM

Power Fault

 

Autostart

CM-2 Current

 

 

 

Will start automatic-

Motor Controller con-

 

 

 

 

 

Module or

 

 

 

tically following

tacts opening and

 

 

 

 

 

Solid State

 

 

 

coastdown

closing in less than 3

 

 

 

 

 

Starter

 

 

 

 

seconds due to a power

 

 

 

 

 

 

 

 

 

 

fault condition

 

 

Remote Stop

 

 

Energy manage-

 

 

 

Start up by start

Remote Stop Contact

 

 

 

 

 

ment System

 

 

 

signal from remote

Closure

 

 

 

 

 

 

 

 

 

start switch

 

 

 

 

 

 

 

 

 

 

 

 

MON.

 

Anti-Recycle,

 

 

Anti-Recycle

 

 

Will not start

Will restart when

Min.Time between

 

 

20 Min. Left

 

 

timer

 

 

until 30 Min.

time left = 00 Min.

successive compres-

 

 

 

 

 

 

 

 

timer is timed

 

sor starts is 30 min.

 

 

 

 

 

 

 

 

 

 

 

TROUBLESHOOTING

SECTION 6

Image 44
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 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 Therefore Function Jumper PositionThen 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 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 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 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 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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