Refrigeration & Air Conditioning Mechanic Red Seal · Question
A system operating with a low suction pressure, high superheat, and normal discharge pressure likely indicates:
These symptoms are classic indicators of an undercharged (low refrigerant charge) system. Low refrigerant means less boiling in the evaporator.
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Question: A system operating with a low suction pressure, high superheat, and normal discharge pressure likely indicates:
Answer options:
- Overcharged system ✅ Undercharged system
- Non-condensables in the system
- Defective expansion valve (wide open)
Correct answer: Undercharged system
Explanation: These symptoms are classic indicators of an undercharged (low refrigerant charge) system. Low refrigerant means less boiling in the evaporator.
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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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