TROUBLESHOOTING OBJECTIVES 4 AND 5

What is a common cause of compressor overheating?

• High humidity levels

• Improper voltages

• Excessive refrigerant charge

• Low ambient temperature

What can lead to a lack of suction gas in a compressor?

• Improper insulation

• High ambient temperature

• Excessive oil return

• Refrigerant undercharge

What is the effect of air in the refrigeration system?

• Higher discharge temperatures

• Increased cooling efficiency

• Lower power consumption

• Reduced compressor wear

What is refrigerant flood-back?

• High discharge pressures

• Low refrigerant levels

• Excessive oil in the system

• Liquid refrigerant returning to the compressor

What can cause mechanical failure in a compressor?

• Excessive lubrication

• Low discharge temperatures

• Metal fatigue

• High refrigerant charge

What is a symptom of a restricted refrigerant line?

• Reduced noise levels

• Improved cooling capacity

• Increased oil return

• Higher than normal pressures

What is the purpose of installing an accumulator?

• To collect liquid refrigerant

• To reduce compressor noise

• To enhance cooling efficiency

• To increase refrigerant flow

What can cause high discharge temperatures in a compressor?

• Excessive oil return

• Air in the system

• Low ambient temperature

• Proper insulation of suction lines

What is a common issue with oversized refrigerant lines?

• Higher discharge pressures

• Too much restriction

• Too low refrigerant velocities

• Increased oil return

What is a potential consequence of poor lubrication in a compressor?

• Reduced wear on components

• Short circuits

• Lower power consumption

• Increased cooling efficiency