Which symptom is indicative of an oil logged condenser?

An oil logged condenser typically leads to high discharge line pressure and low liquid line pressure. This situation arises because the accumulation of oil in the condenser can restrict the flow of refrigerant, causing the refrigerant to not adequately condense and resulting in higher pressure in the discharge line. The refrigerant may struggle to convert to liquid due to this obstruction, leading to a decrease in liquid line pressure as less liquid refrigerant returns to the evaporator.

In this scenario, understanding the operational dynamics of a refrigeration system helps clarify why this symptom indicates an oil logged condenser. High discharge pressures signal that the compressor is working harder than it should due to the restricted flow caused by the oil. As the liquid line pressure is dependent on the proper function of the condenser, its drop further confirms the presence of oil in the system—a condition that impedes the normal refrigeration cycle.

The other symptoms listed do not accurately represent the characteristic signs of an oil logged condenser, as they either suggest a different issue or exhibit behaviors inconsistent with the implications of oil in the condenser.