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25
Troubleshooting Chart — Cooling
REFRIGERANT SYSTEM
DIAGNOSIS COOLING
Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure
Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions
Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across
Indoor Coil Indoor Coil Restriction Outdoor Coil
Refrigerant System Reversing Valve not Reversing Valve not Overcharged
Restriction Fully Seated Fully Seated
Undercharged Overcharged Undercharged Noncondendsables (air)
in System
Moisture in System Defective Compressor Defective Compressor