NEXON EV SERVICE MANUAL

FATC 34 2 Excessive refrigerant or insufficient conden- ser cooling. Condition • Air conditioner does not cool effectively Symptoms in refrigerant cycle • Pressure on both the high and low pressure sides is high. Cause • Refrigerant is overcharge in the refrig- erating cycle causing poor cooling performance • Condenser cooling performance is poor. • Fluid coupling on fan is slipping. Diagnosis • Excessive refrigerant in the refrigerating cycle. • Overcharged refrigerant. • Poor condenser cooling performance. • Condenser fins blocked or fan belt loose. • Slipping radiator fan fluid coupling. • Silicone oil leaking from the coupling. Countermeasures • Clean the condenser. • Tighten the fan belt to the correct tension. • Repair the fluid coupling and adjust silicone oil quantity to the proper level. • Above are all normal check the refrigerant. 3 Entry of moisture in the refrigerant cycle Condition • Air conditioner alternately cools and does not cool. Symptoms in refrigerant cycle • During operation, the pressure on the low pressure side alternates between vacuum and normal. Cause • The moisture mixed in the refrigerant in the refrigerating cycle freezes in the ex- pansion valve orifice, blocking the cycle. After a time, the ice melts and normal conditions return Diagnosis • The drier is in an oversaturated condi- tion. • The moisture in the refrigerating cycle freezes the expansion valve orifice, im- peding refrigerant circulation. Countermeasures • Remove the moisture by repeated evacuation. • Recharge new refrigerant to the specified amount.