After this lesson, you will understand the various types of ductless air conditioners and how the components function, including basic maintenance. • Describe the different types of ductless air conditioners • Explain the purpose of each major component in a ductless air conditioning system • Demonstrate an understanding of how each component’s operation relates to the basic refrigeration cycle • Describe the basic preventive maintenance procedures performed on a ductless air conditioner • Explain the common problems that can occur with an air conditioning system and how they may be corrected