HAC 3020 - HVAC Troubleshooting

A.  Safety

1. Demonstrate an understanding of HVAC related safety issues
2. Describe general safety rules including but not limited to ladder safety, electrical safety, proper lifting techniques, and handling refrigerants.

B.  Electrical Troubleshooting

1. Explain how to use a schematic to troubleshoot HVACR equipment
2. Explain how to use a multi-meter to troubleshoot  HVACR equipment
3. Explain how to use a multi-meter to test electrical or electro-mechanical components.

C.  Mechanical Troubleshooting

1. Describe how to troubleshoot compressor problems
2. Describe how the condensate drain affects the HVACR system
3. Describe how to clean coils and troubleshoot problems with coils.
4. Describe how to troubleshoot ducting problems

D.  Airflow Troubleshooting

1. Explain the need to change filters
2. Explain how to check system CFM and adjust airflow
3. Describe how to locate and correct airflow problems
4. Explain the reasons to check wet bulb, dry bulb dew point, and relative humidity when servicing HVACR equipment
5. Explain how to plot air properties using a psychometric chart
6. Describe the affect dirty coils has on HVACR equipment

E.  Refrigerant Troubleshooting

1. Explain superheat / sub-cooling
2. Describe methods used to charge a HVACR system
3. Describe steps used to determine if the system charge is low
4. Describe system problems that may appear to be a refrigerant charge problem