HVAC 42 REFRIGERATION CYCLE TROUBLESHOOTING Sr. No. Possible Cause Remedy 1 Insufficient refrigerant Condition x Air conditioner does not cool effectively Symptoms in refrigerant cycle x Pressure on both the high and low pressure sides is low x Air around the air outlet is slightly cold Cause x There is gas leakage in the refrigerating cycle Diagnosis x Insufficient refrigerant in the refrigerating cycle x Refrigerant leakage Countermeasures x Locate the leakage and repair x Recharge refrigerant to the specified amount 2 Excessive refrigerant or insufficient condenser cooling. Condition x Air conditioner does not cool effectively Symptoms in refrigerant cycle x Pressure on both the high and low pressure sides is high. Cause x Refrigerant is overcharge in the refrigerating cycle causing poor cooling performance x Condenser cooling performance is poor. Diagnosis x Excessive refrigerant in the refrigerating cycle. x Overcharged refrigerant. Poor condenser cooling performance. Countermeasures x Clean the condenser. x Tighten the fan belt to the correct tension. x Above are all normal check the refrigerant.
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