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York YK M3 M3 G4 Section Microcomputer Control Center, Microcomputer Control Center And Keypad

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

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SECTION 2

SECTION 2

MICROCOMPUTER CONTROL CENTER

26879A

LD00953

FIG. 3 – MICROCOMPUTER CONTROL CENTER AND KEYPAD

NOTE: This instruction covers operation of chillers equipped with Electro-Mechanical or Solid State Starters. If chiller is equipped with Variable Speed Drive, Form 160.00-O1 is to be used in conjunction with this manual.

WARNING

This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accor- dance with the instructions manual, may cause interference to radio communications. Operation of this equip- ment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever action may be required to correct the interference.

Additionally, any electronic equipment can generate EMI (electromagnetic interference) which, depending upon the installation and magnitude, may affect other electronic equipment. The amount of EMI generated is deter- mined by the source inductance, load inductance, and circuit impedances. Responsibility for assuring the satisfactory operation of other equipment included in the same power source as the YORK equipment rests solely with the user. YORK disclaims any liability resulting from any interference or for the correction thereof.

6	YORK INTERNATIONAL

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York YK M3 M3 G4 operation manual Section Microcomputer Control Center, Microcomputer Control Center And Keypad

FAQ

What kind of starters are covered in this manual?

This instruction covers operation of chillers equipped with Electro-Mechanical or Solid State Starters.

What should be used if the chiller is equipped with Variable Speed Drive?

If chiller is equipped with Variable Speed Drive, Form 160.00-O1 is to be used in conjunction with this manual.

What should be done if this equipment causes interference in a residential area?

If the operation of this equipment in a residential area causes interference, the user will be required to take whatever action may be required to correct the interference at his own expense.

Contents

MILLENNIUM TM W ARNINGDESCRIPTION TABLE OF CONTENTSREFERENCE INSTRUCTIONS FORM NONOMENCLATURE R-22UNITSR-134a SECTION SYSTEM OPERATION DESCRIPTION See FigCAPACITY CONTROL SECTION MICROCOMPUTER CONTROL CENTER FIG. 3 - MICROCOMPUTER CONTROL CENTER AND KEYPADINTRODUCTION CONTROL CENTER OPERATIONDISPLAYING SYSTEM PARAMETERS To Display OIL PRESSURE To Display CHILLED LIQUID TEMPERATURESTo Display REFRIGERANT PRESSURE To Display SSS MOTOR CURRENT / VOLTSTo Display OPERATING HOURS and STARTS COUNTER is displayedTo Display MOTOR CURRENT SYSTEM SETPOINTSPage DISPLAYING SYSTEM SETPOINTS To Display REMOTE RESET TEMP RANGE Setpoint Solid State Starter Applications OnlyTHE MICROCOMPUTER CONTROL CENTER PROGRAMMING1.Press ACCESS CODE key PROGRAMMING SYSTEM SETPOINTSElectro-MechanicalStarter, refer to Fig Solid State Starter, refer to FigTo Enter PULL DOWN DEMAND Setpoint Refer to Fig 3.Press and release ADVANCE DAY/SCROLL key.The following prompt message is displayed To Enter REMOTE/ RESET TEMP RANGE Setpoint Refer to Fig SERVICE KEYS PRE-ROTATIONVANES KEYSOTHER SERVICE KEYS OPERATING MODES 1.Press ACCESS CODE keyCOMPRESSOR SWITCH DISPLAY MESSAGESTherefore SYSTEM SHUTDOWN MESSAGES when Control Center is in REMOTE mode Phase rotation/loss Solid State Starter applications only FUNCTIONJUMPER POSITION Solid State Starter applications onlySolid State Starter applications only MON XX XX AM - OPEN DRAIN TEMP THERMOCOUPLE MON XX XX AM - AUX SAFETY SHUTDOWNMON XX XX AM - HIGH SPEED DRAIN TEMP MON XX XX AM - DC UNDERVOLTAGESECTION fused disconnect switch to the starter orSTART-UPPROCEDURE and remains energized as long as theCHILLER OPERATION Condenser Water Temperature Control SYSTEM STARTING & SHUTDOWN SEQUENCEOPERATOR INITIATED CHECKING OPERATION OPERATING LOG SHEETWeekly OPERATING INSPECTIONS - See SectionDaily QuarterlySAFETY SHUTDOWNS NEED FOR MAINTENANCE OR SERVICENORMAL AND SAFETY SYSTEM SHUTDOWNS CYCLING SHUTDOWNSPROLONGED SHUTDOWN START-UPAFTER PROLONGED SHUTDOWNFRONT VIEW SECTIONSYSTEM COMPONENTS DESCRIPTION 27385ACAPACITY CONTROL GENERALCOMPRESSOR COMPRESSOR LUBRICATION SYSTEM See FigLD00951 HEAT EXCHANGERS OIL HEATERMOTOR DRIVELINE REFRIGERANT FLOW CONTROLVARIABLE SPEED DRIVE Optional MICROCOMPUTER CONTROL CENTER See SectionSOLID STATE STARTER Optional ACTUAL LEVEL = XXX% LEVEL SETP = XXX%OPERATIONAL MAINTENANCE SECTIONOIL RETURN SYSTEM OIL CHARGING PROCEDURE THE OIL CHARGETROUBLESHOOTING SECTIONYORK INTERNATIONAL YORK INTERNATIONAL 3. SYMPTOM HIGH COOLER PRESSURE 1. SYMPTOM ABNORMALLY HIGH DISCHARGE PRESSURE2. SYMPTOM ABNORMALLY LOW SUCTION PRESSURE RESULTSRESULTS 7. SYMPTOM OIL PUMP VIBRATES OR IS NOISY11. SYMPTOM REDUCED OIL PUMP CAPACITY POSSIBLE CAUSERENEWAL PARTS LEAK TESTING DURING OPERATIONSECTION CHECKING SYSTEM FOR LEAKSVACUUM TESTING VACUUM DEHYDRATION REFRIGERANT CHARGING CHECKING THE REFRIGERANT CHARGEDURING UNIT SHUTDOWN HANDLING REFRIGERANT FOR DISMANTLING AND REPAIRS MEGGING THE MOTOROpen Motors LD00476COMMERCIAL ACID CLEANING CLEANING COOLER AND CONDENSER TUBESTUBE CLEANING PROCEDURES GENERALTESTING FOR COOLER AND CONDENSER TUBE LEAKS COMPRESSOR ELECTRICAL CONTROLSCOMPRESSOR PRESSURE TESTINGSECTION COMPRESSOR MOTORELECTRICAL CONTROLS ALL RIGHTS RESERVED P.O. Box 1592, York, Pennsylvania USACopyright by York International Corporation Form 160.49-O21296