If a refrigeration system compressor...

Question 1 / 270705eccef9ebacbc34ba4d46178

Question 1 of 270705eccef9ebacbc34ba4d46178

If a refrigeration system compressor crankcase is exhibiting an unusual degree of sweating or frosting and is operating noisily, what should be done?

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Question 1 of 27070

If a refrigeration system compressor crankcase is exhibiting an unusual degree of sweating or frosting and is operating noisily, what should be done?

🔍 Key Concepts

• Refrigeration system diagnostics when a compressor crankcase is sweating or frosting • Relationship between evaporator superheat, liquid refrigerant return, and compressor crankcase condition • Why adding refrigerant, adding oil, or opening an expansion valve might make flooding/icing problems better or worse

💭 Think About

• What does heavy sweating or frosting on the compressor crankcase usually indicate about the state (liquid vs vapor) and temperature of refrigerant returning to the compressor? • Which action would help ensure that only superheated vapor (not liquid refrigerant) is returning to the compressor? • Which options, if done incorrectly, could actually increase liquid floodback to the compressor and make sweating/frosting and noise worse?

✅ Before You Answer

• Verify which choice is directly related to controlling superheat at the evaporator outlet. • Consider whether adding refrigerant or opening a valve would tend to send more liquid refrigerant toward the compressor. • Ask yourself which adjustment is a standard corrective step when a compressor is noisy and the crankcase is frosting from possible liquid floodback.

Question 1 of 27070

If a refrigeration system compressor crankcase is exhibiting an unusual degree of sweating or frosting and is operating noisily, what should be done?

add refrigerant to the system

check the evaporator superheat

add oil to the crankcase

open the hand expansion valve

Question 1 / 270705eccef9ebacbc34ba4d46178

Question 1 of 270705eccef9ebacbc34ba4d46178

If a refrigeration system compressor crankcase is exhibiting an unusual degree of sweating or frosting and is operating noisily, what should be done?

Back

Question 1 of 27070

If a refrigeration system compressor crankcase is exhibiting an unusual degree of sweating or frosting and is operating noisily, what should be done?