What could indicate a potential leak in a low-pressure refrigeration system?

• A. Unchanged system pressure
• B. Increased energy efficiency
• C. Fluctuating discharge pressures
• D. Cooling performance improvement

Answer: (C)

The presence of fluctuating discharge pressures can be a significant indicator of a potential leak in a low-pressure refrigeration system. When a leak occurs, the system may not maintain a consistent pressure level due to the loss of refrigerant. This inconsistency can cause discharge pressures to vary unexpectedly, as the compressor attempts to compensate for the loss of refrigerant by working harder or differently than it should under normal operations. Monitoring and interpreting pressure readings are crucial in diagnosing the health of a refrigeration system, and fluctuations indicate that there may be an issue requiring immediate attention.

In contrast, unchanged system pressure, increased energy efficiency, and improvements in cooling performance are typically signs of a properly functioning refrigeration system. Unchanged pressure suggests stability, while increased efficiency and better cooling performance often indicate that the system is operating well rather than experiencing a leak.