Troubleshooting- Oil Problems & Refrigerant Problems

What is a common cause of overheating in HVAC/R systems?

• Dirty condenser coils

• Excessive lubrication

• High oil temperature

• Low refrigerant levels

What can result from an oil shortage in HVAC/R systems?

• Increased efficiency

• Loss of lubrication

• Improved cooling

• Reduced wear on components

What is a symptom of excess oil in a refrigeration system?

• Compressor overheating

• Oil slugging

• Low suction pressure

• High superheat

What does trapped oil in a refrigeration system indicate?

• Proper oil circulation

• Excessive lubrication

• Low refrigerant levels

• Faulty component or piping design

What is a common contaminant in refrigeration oil?

• Moisture

• Dust

• Refrigerant

• Excess oil

What can cause low suction pressure and high superheat?

• Excessive lubrication

• Refrigerant leaks

• High ambient temperatures

• Properly sized equipment

What is a potential cause of excessive discharge pressures?

• Properly functioning compressor

• Lack of condenser cooling

• Low refrigerant levels

• Dirty evaporator coils

What is the effect of non-condensable gases in a refrigeration system?

• Higher discharge pressures

• Increased efficiency

• Reduced discharge pressures

• Improved lubrication

What is a sign of contaminated oil in a refrigeration system?

• Low oil temperature

• Increased lubrication effectiveness

• Copper plating on steel parts

• Clear oil color

What should be done if there is an oil shortage?

• Reduce system pressure

• Check for leaks and replace oil

• Ignore the issue

• Increase refrigerant charge