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Bryant R-22 service manual Heat Pump Troubleshooting–Coolingcycle, 49

Models: R-22

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HEAT PUMP

HEAT PUMP

TROUBLESHOOTING–COOLING CYCLE

NO COOLING OR

INSUFFICIENT

COOLING

COMPRESSOR WILL NOT RUN

COMPRESSOR

RUNS BUT

CYCLES ON

INTERNAL

OVERLOAD

COMPRESSOR

RUNS BUT

INSUFFICIENT

COOLING

OUTDOOR FAN

HIGH SUCTION

HIGH SUCTION

CONTACTOR

OPEN

POWER SUPPLY

DEFECTIVE

LOW-VOLTAGE TRANSFORMER

OPEN

THERMOSTAT

OPEN CONTROL

CIRCUIT

LOSS OF

CHARGE

CONTACTOR OR COIL DEFECTIVE

LOOSE

CONTACTOR

CLOSED

COMPRESSOR POWER SUPPLY OPEN

LOOSE LEADS AT

COMPRESSOR

FAULTY START

GEAR (1-PH)

OPEN SHORTED OR GROUNDED COMPRESSOR MOTOR WINDINGS

COMPRESSOR

STUCK

COMPRESSOR

INTERNAL

PROTECTION

OPEN

STOPPED OR CYCLING ON OVERLOAD

OUTDOOR AIR

RESTRICTED OR RECIRCULATING

DAMAGED OR

STUCK

REVERSING

VALVE

RESTRICTED DISCHARGE TUBE

OVERCHARGE

OR NON-

CONDENSABLES

IN SYSTEM

LOW

REFRIGERANT

CHARGE

LINE VOLTAGE TOO HIGH OR LOW

LOOSE LEAD

AT FAN MOTOR

DEFROST RELAY N.C. CONTACTS OPEN

MOTOR

DEFECTIVE

INCORRECT

OFM

CAPACITOR

DEFECTIVE

DEFROST

THERMOSTAT

LOW SUCTION

PRESSURE

DIRTY AIR

FILTERS

DUCT

RESTRICTED

DAMPERS

PARTLY CLOSED

INDOOR COIL

FROSTED

SLIGHTLY

LOW ON

REFRIGERANT

LIQUID LINE

SLIGHTLY

RESTRICTED

LOW HEAD

PRESSURE

REVERSING

VALVE HUNG UP

OR INTERNAL

LEAK

DEFECTIVE

COMPRESSOR

VALVES

INTERNAL

PRESSURE

RELIEF OPEN

LOW

SUPERHEAT

UNIT

OVERCHARGED

INCORRECT

SIZE

PISTON

ELECTRICAL CONNECTION

DEFECTIVE RUN

CAPACITOR

DEFECTIVE RUN

CAPACITOR

COMPRESSOR

BEARINGS

HIGH

SUPERHEAT

PISTON

RESTRICTED

INCORRECT

SIZE

PISTON

INDOOR COIL

STRAINER

RESTRICTED

INDOOR

BLOWER MOTOR

DEFECTIVE OR CYCLING ON OL

A90207

Fig. 53—Heat-Pump Troubleshooting Chart — Cooling Cycle

—49—

Image 49

Bryant R-22 service manual Heat Pump Troubleshooting–Coolingcycle, 49

Contents

SAFETY CONSIDERATIONS TABLE OF CONTENTSApplication Guide and Service Manual II. ADD-ONREPLACEMENT RETROFIT INSTALLATION GUIDELINEACCESSORY DESCRIPTIONS VIII. LOW-AMBIENTPRESSURE SWITCHIX. WIND BAFFLE II. INTERCONNECTING TUBING SIZINGX. COASTAL FILTER XI. SUPPORT FEETSUPPORT BAFFLE ASSEMBLYBAFFLE Fig. 1—WindBaffle Construction for Reliant UnitsBAFFLE ASSEMBLY Fig. 2—WindBaffle Construction for Cube UnitsSUPPORT III. METERING DEVICE SIZING TABLE 3—WINDBAFFLE DIMENSIONS FOR CUBE UNITS INTABLE 5—FITTINGLOSSES IN EQUIVALENT FT Fig. 3—TubeBend LossesTABLE 6—CALCULATIONOF INDOOR PISTON NO TABLE 7—CALCULATIONOF OUTDOOR PISTON NOTABLE 9—LIQUID-LINESOLENOID KIT PART NUMBERS TABLE 8—COMMONPISTON SIZESV. CHARGING INFORMATION VI. 2–SPEEDAPPLICATIONSPositions 6 through 10—SerialNumber II. SERIAL NUMBER IDENTIFICATIONCABINET II. REMOVE FAN-MOTOR ASSEMBLY—BEFORE1/1/92I. REMOVE TOP COVER—BEFORE1/1/92 III. INFORMATION PLATE—RELIANTPRODUCTSVI. REMOVE FAN-MOTOR ASSEMBLY—AFTER1/1/92 Fig. 8—BasicCabinet Designs I. ALUMINUM WIREELECTRICAL II. CONTACTORS Fig. 9—InformationPlateFig. 12—Capacitors Fig. 11—Contactor III. CAPACITORSFig. 13—PTCDevices IV. CYCLE PROTECTOR Fig. 14—CapacitanceBoostingFig. 15—Cycle-ProtectorDevice VI. TIME-DELAYRELAYV. CRANKCASE HEATER Fig. 18—Wiringfor Single-PoleContactor Fig. 17—Cycle-ProtectorWiringVII. PRESSURE SWITCHES Fig. 16—Cycle-ProtectorSequenceIX. DEFROST-CONTROLBOARD VIII. DEFROST THERMOSTATSFig. 19—JumperDFT and R Terminals Fig. 21—CheckingBetween C and W2 Fig. 20—InsertingJumper WireTABLE 10—DEFROSTCONTROL SPEED-UPTIMING SE QUENCE FOR CES0110063/CES0130024XI. SERVICE ALARM CONTROL BOARD TABLE 11—DEFROSTTIMER SETTINGSX. FAN MOTORS OF2 CESO130076–00 Fig. 23—DefrostThermostat Location TABLE 12—FANPOSITIONFig. 24—FanPosition —23—XIII. COMPRESSOR PLUG Fig. 25—ServiceAlarm Wiring ConnectionsRECIPROCATING COMPRESSOR Fig. 27—CompressorPlug XIV. LOW-VOLTAGETERMINALSI. MECHANICAL FAILURES II. ELECTRICAL FAILURES Fig. 28—IdentifyingInternal ConnectionsIV. COMPRESSOR REMOVAL AND REPLACEMENT III. SYSTEM CLEANUP AFTER BURNOUTII. TROUBLESHOOTING COPELAND SCROLL COMPRESSOR I. FEATURESTABLE 13—COMPRESSOROIL RECHARGE Fig. 29—ScrollCompressor Refrigerant FlowIII. TROUBLESHOOTING MILLENNIUM SCROLL COMPRESSOR I. FEATURESIV. SCROLL COMPRESSOR, 3–PHASEMONITOR Fig. 30—Locationof Discharge ThermostatFig. 32—CESO130075 3–PhaseMonitor Wiring Diagram Fig. 31—CES0130075 3–PhaseMonitor Board—30— LOW-SPEEDOPERATION TABLE 14—AMBIENTTEMPERATURE FOR HIGH- ANDFig. 33—Two-SpeedControl Board Fig. 34—SpeedupTerminalsFig. 35—TypicalCooling Balance Points TABLE 15—FUNCTIONLIGHT CODE AND DISPLAY LOCATIONIII. FACTORY DEFAULTS Fig. 36—Low-VoltageControl WiringTABLE 17—FACTORYDEFAULTS TABLE 16—COMPRESSORPTC RANGESFig. 39—ResistanceValues Versus Temperature Fig. 37—Header-PinHousingVI. TROUBLESHOOTING THERMISTOR CURVEII. LEAK DETECTION REFRIGERATION SYSTEM I. REFRIGERATION CYCLEFig. 41—High-SpeedWindings Fig. 40—Low-SpeedWindings—36— TABLE 19—24VPIN CONNECTION TROUBLESHOOTING Fig. 42—HeatPump Refrigerant-FlowDiagramsFig. 43—LeakDetector III. BRAZING IV. SERVICE VALVES Fig. 44—ServiceValvesVI. REVERSING VALVE Fig. 45—Check-Flo-RaterComponentsFig. 47—ReversingValve Cooling Mode or Defrost Fig. 46—ReversingValveMode, Solenoid Energized VII. THERMOSTATIC-EXPANSIONVALVES TXVEnergized Fig. 48—ReversingValve Heating Mode, Solenoid DeVIII. THERMOSTATIC-EXPANSIONVALVE BI-FLOWTXV IX. COIL REMOVALFig. 50—TXVin Heating Mode Fig. 49—TXVin Cooling Mode—42— XII. CONTAMINANT REMOVAL XI. ACCUMULATORFig. 51—Accumulator XIII. SYSTEM CHARGINGTABLE 21—SUPERHEATCHARGING TABLE TABLE 22-REQUIREDVAPOR TEMPERATURE FCARE AND MAINTENANCE TABLE 24—REQUIRED LIQUID-LINETEMPERATURE Desert and Seacoast Locations Special maintenance requirements are as follows—47— Fig. 52—Air-ConditionerTroubleshooting Chart AIR CONDITIONER TROUBLESHOOTING CHART—49— HEAT PUMP TROUBLESHOOTING–COOLINGCYCLE—50— HEAT PUMP TROUBLESHOOTING–HEATINGCYCLE—51— Printed in U.S.A —52—sm01,025 Catalog No.