During tests to discover why a refrigeration...

Question 1 / 205eccef9ebacbc34ba4d46195

Question 1 of 205eccef9ebacbc34ba4d46195

During tests to discover why a refrigeration compressor is running continuously, it is determined that the refrigerated space temperature is slightly above normal without ever reaching the desired minimum temperature. Suction and discharge pressures are normal for the corresponding box temperature. In this situation, what should you suspect?

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🔍 Key Concepts

• Heat gain vs. system capacity in a refrigerated space • Relationship between system pressures and refrigerant charge or non‑condensables (like air) • Typical symptoms of leaks in insulation or door gaskets versus mechanical or charge problems

💭 Think About

• If suction and discharge pressures are normal for the measured box temperature, what does that tell you about the compressor and refrigerant circuit itself? • Which problem(s) would usually change system pressures or temperatures at the compressor, rather than just making the box warm? • Which option would cause the compressor to run longer while still looking ‘normal’ at the gauges, because the box keeps gaining heat from outside?

✅ Before You Answer

• Verify which faults (like air in the system or shortage of refrigerant) would typically show abnormal suction/discharge pressures or temperatures. • Consider whether high cooling water temperature to the condenser would affect head (discharge) pressure readings. • Think about how door gasket condition affects the rate of warm air entering the box without directly changing compressor operating pressures.

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Question 1 of 20

high cooling water temperature

air in the system

leaking door gaskets

a shortage of refrigerant

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Question 1 / 205eccef9ebacbc34ba4d46195

Question 1 of 205eccef9ebacbc34ba4d46195

Back

Question 1 of 20

5eccef9ebacbc34ba4d46195

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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