Refrigeration & Air Conditioning Mechanic Red Seal · Question
Under what condition would a low-pressure control typically trip the compressor?
The low-pressure cut-out switch protects the compressor from operating under vacuum conditions or with insufficient refrigerant flow, which can cause overheatin
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Question: Under what condition would a low-pressure control typically trip the compressor?
Answer options:
- When the discharge pressure is too high ✅ When the suction pressure drops below a safe operating limit, indicating a serious problem like a refrigerant leak or restricted flow
- When the oil pressure is too low
- When the motor current draw is excessive
Correct answer: When the suction pressure drops below a safe operating limit, indicating a serious problem like a refrigerant leak or restricted flow
Explanation: The low-pressure cut-out switch protects the compressor from operating under vacuum conditions or with insufficient refrigerant flow, which can cause overheating and damage. It trips when suction pressure drops too low.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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