Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system is operating with a high superheat and a low suction pressure. What is a likely cause?
A restricted liquid line filter-drier reduces refrigerant flow to the evaporator, leading to starving, high superheat, and low suction pressure.
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Question: A refrigeration system is operating with a high superheat and a low suction pressure. What is a likely cause?
Answer options:
- Overcharge of refrigerant ✅ Restricted liquid line filter-drier
- Oversized expansion valve
- Non-condensable gases in the system
Correct answer: Restricted liquid line filter-drier
Explanation: A restricted liquid line filter-drier reduces refrigerant flow to the evaporator, leading to starving, high superheat, and low suction pressure.
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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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