Bryant R-22 service manual Heat Pump Troubleshooting Cooling Cycle, A90207

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

ELECTRICAL CONNECTION

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

DEFECTIVE RUN

CAPACITOR

DEFECTIVE

START

CAPACITOR

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

DEFECTIVE RUN

CAPACITOR

COMPRESSOR

BEARINGS

HIGH

SUPERHEAT

DEFECTIVE

START

CAPACITOR

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

PISTON

RESTRICTED

INCORRECT

SIZE

PISTON

INDOOR COIL

STRAINER

RESTRICTED

INDOOR

BLOWER MOTOR

DEFECTIVE OR CYCLING ON OL

LOW HEAD

PRESSURE

REVERSING

VALVE HUNG UP

OR INTERNAL

LEAK

DEFECTIVE

COMPRESSOR

VALVES

INTERNAL

PRESSURE

RELIEF OPEN

LOW

SUPERHEAT

UNIT

OVERCHARGED

INCORRECT

SIZE

PISTON

FAILED

TXV

A90207

Fig. 61 – Heat Pump Troubleshooting - Cooling Cycle

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