Refrigeration & Air Conditioning Mechanic Red Seal · Question
A compressor's amperage draw is significantly higher than its rated full-load amperage (FLA), but the discharge pressure is normal. What is a likely cause?
High amperage with normal pressures often indicates an internal electrical issue within the compressor motor, such as shorted windings.
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Question: A compressor's amperage draw is significantly higher than its rated full-load amperage (FLA), but the discharge pressure is normal. What is a likely cause?
Answer options:
- Low refrigerant charge
- Restriction in the liquid line ✅ Failing compressor motor windings
- Overcharged system
Correct answer: Failing compressor motor windings
Explanation: High amperage with normal pressures often indicates an internal electrical issue within the compressor motor, such as shorted windings.
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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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