Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?（）<br>A:Shortage of refrigerant oil<br>B:Slight shortage of refrigerant<br>C:Excessive condenser cooling water flow<br>D:Faulty expansion valve

Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?（）
A:Shortage of refrigerant oil
B:Slight shortage of refrigerant
C:Excessive condenser cooling water flow
D:Faulty expansion valve

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