Customer Service, Safety, and Documentation
Core concepts
This domain blends professionalism with technical safety. Understand refrigerant safety-ASRAE classifications, PPE, ventilation, and safe handling of A2L refrigerants. Know lockout/tagout, electrical safety, brazing fire precautions, and ladder safety. Customer service includes clear communication, setting expectations, explaining findings without jargon, and documenting work. Documentation covers service tickets, refrigerant tracking logs, warranty forms, and commissioning records.
Traps in questions
Questions may test whether you vent refrigerant (never) or recover it. Watch for A2L flammability precautions-no ignition sources, proper leak detection. Do not assume PPE is optional for short jobs. Customer service traps include promising outcomes beyond your authority or failing to document verbal agreements. Always record refrigerant added or recovered for compliance.
Worked example
Before brazing, verify a fire extinguisher is present, purge with nitrogen, and wear eye protection. After service, document refrigerant recovered, added, and final readings. Rule of thumb: if it is not documented, it did not happen.
Study tip
Review EPA refrigerant handling rules and practice writing a clear service summary.