Which of the following does not increase the chance of a compressor surging?

Increasing the suction pressure is the action that does not increase the chance of a compressor surging. When suction pressure is increased, it means that the compressor is able to draw in refrigerant gas more effectively, which can improve the overall efficiency and stability of the compressor operation. A higher suction pressure tends to support optimal flow rates and reduces the potential for conditions that lead to surging, which occurs when the flow of refrigerant through the compressor becomes unstable, leading to fluctuations in pressure and potential reverse flow.

In contrast, decreasing the refrigerant charge, increasing ambient temperature, or reducing the load on the compressor can create conditions that make surging more likely. A low refrigerant charge can lead to reduced cooling capacity and can cause the compressor to struggle to maintain proper operation. Similarly, high ambient temperatures may force the compressor to work harder than usual while lacking sufficient refrigerant flow, leading to instability. Finally, reducing the load on the compressor can disrupt the necessary pressure and flow dynamics within the system, fostering conditions conducive to surging.