What is the potential consequence of introducing excessive liquid refrigerant into the compressor?

Introducing excessive liquid refrigerant into the compressor can lead to compressor lock-up, which is a critical issue in the operation of refrigeration and air conditioning systems. Compressors are designed to compress vapor rather than liquid. When too much liquid refrigerant enters the compressor, it can cause a condition known as "liquid slugging." This occurs because the liquid cannot be compressed and may cause the compressor’s pistons or rotors to jam, leading to severe mechanical damage or complete failure of the compressor.

Thus, the consequence of liquid slugging is a malfunction that prevents the compressor from operating efficiently or at all, emphasizing the importance of maintaining the correct refrigerant levels in a system to ensure safe operation. The other options suggest improvements in capacity or efficiency, which do not accurately represent the consequences of introducing excessive liquid refrigerant into the system, as they involve adverse effects rather than enhancements.