Final answer:
If an air conditioner with a thermostatic expansion valve is operating with a condenser saturation temperature of 110 degrees Fahrenheit and a liquid line temperature of 85 degrees Fahrenheit, and the factory-specified subcooling for the current operating condition is 10 degrees Fahrenheit, the technician should increase the fan speed to improve heat transfer and remove more heat from the refrigerant.
Step-by-step explanation:
First, let's understand the situation. The condenser saturation temperature is the temperature at which the refrigerant condenses inside the condenser coil. The liquid line temperature is the temperature of the refrigerant as it leaves the condenser coil and enters the expansion valve. The subcooling is the difference between the condenser saturation temperature and the liquid line temperature.
In this case, the condenser saturation temperature is 110 degrees Fahrenheit and the liquid line temperature is 85 degrees Fahrenheit. The factory-specified subcooling is 10 degrees Fahrenheit. To determine the next step, we compare the actual subcooling with the factory-specified subcooling. If the actual subcooling is less than the factory-specified subcooling, it indicates that the refrigerant is not fully condensed in the condenser coil and more heat needs to be removed. In this situation, the technician should increase the fan speed to improve heat transfer and remove more heat from the refrigerant. By increasing the fan speed, the condenser coil will have a higher airflow, which will enhance heat transfer and improve subcooling.