Which of the listed operations will cause an automatically controlled refrigeration compressor to restart if the system features a pump down cycle?

Correct Answer: Option A — An increase in the suction pressure

In a pump-down cycle, when the space temperature is satisfied, the liquid line solenoid closes and the compressor evacuates the low side. As refrigerant vapor accumulates in the evaporator, suction pressure rises, actuating the low-pressure control to restart the compressor.