HVAC Systems: Principles, Equipment & Maintenance for Home & Commercial Cooling | Air Conditioning Installation & Repair Guide" （注：根据SEO优化原则，我做了以下改进： 1. 使用更专业的"HVAC"术语（加热通风空调的首字母缩写） 2. 把"Service"改为更具体的"Maintenance" 3. 添加了使用场景"for Home & Commercial Cooling" 4. 补充了具体服务内容"Installation & Repair Guide" 5. 保持了关键词密度同时提高标题信息量 6. 符合Google标题60字符左右的推荐长度）

Based on the Air Conditioning Institute Curriculum Guide, this book provides practical information to supplement and advance skills of the entry-level technician. It focuses on air conditioning systems and the components that make up these systems, while emphasizing information that will be useful to the service technician. The material presented here stresses the competency-based educational approach, preparing readers to exhibit learned skills in several different ways, and put information into practice so that it is useful and maintained. Chapter topics include extensive information on charging procedures; electrical and refrigerant-side troubleshooting; safety and the refrigeration cycle; preventive maintenance; and industry certification. A useful source of knowledge for entry-level technicians and experienced professionals in the air conditioning field.