Carrier 38VTA040 - Troubleshooting Guide; Cooling Cycle Issues

10
TROUBLE-SHOOTING CHART - COOLING CYCLE
NO COOLING OR IN-
SUFFICIENT COOLING
COMPRESSOR RUNS
BUT CYCLES ON
INTERNAL OVERLOAD
COMPRESSOR
WILL NOT RUN
CONTACTOR OPEN
COMPRESSOR POWER
SUPPLY OPEN
CONTACTOR CLOSED
LOOSE LEADS
AT COMPRESSOR
OPEN SHORTED OR
GROUNDED COMPRESSOR
MOTOR WINDINGS
COMPRESSOR
INTERNAL
PROTECTION OPEN
COMPRESSOR STUCK
RESTRICTED
DISCHARGE LINE
OUTDOOR FAN
STOPPED OR CYCLING
ON OVERLOAD
OUTDOOR AIR
RESTRICTED OR
RECIRCULATING
OVERCHARGE OR
NONCONDENSABLES
IN SYSTEM
LINE VOLTAGE
TOO HIGH OR LOW
COMPRESSOR
BEARINGS
LOW REFRIGERANT
CHARGE
HIGH SUPERHEAT
LOOSE LEAD AT
FAN MOTOR
MOTOR DEFECTIVE
INCORRECT
OUTDOOR FAN MOTOR
CAPACITOR
LOW SUCTION
PRESSURE
DIRTY AIR FILTERS
DUCT RESTRICTED
DAMPERS PARTLY
CLOSED
INDOOR COIL
FROSTED
SLIGHTLY LOW OR
REFRIGERANT
LIQUID LINE SLIGHTLY
RESTRICTED
METERING DEVICE
RESTRICTED
INCORRECT
METERING DEVICE
INDOOR COIL
STRAINER RESTRICTED
COMPRESSOR RUNS
BUT INSUFFICIENT
COOLING
HIGH SUCTION
LOW HEAD PRESSURE
DEFECTIVE
COMPRESSOR VALVES
INTERNAL PRESSURE
RELIEF OPEN
HIGH SUCTION
LOW SUPERHEAT
INCORRECT
METERING DEVICE
UNIT OVERCHARGED
FAULTY POWER
SUPPLY
OPEN CONTROL
CIRCUIT
CONTACTOR OR
COIL DEFECTIVE
LOOSE ELECTRICAL
CONNECTION
INTERNAL
OVERLOAD OPEN