HVAC Safety and Service Boundaries

Identify the electrical, stored-energy, pressure, refrigerant, sharp-edge, and rotating-equipment hazards present in a residential mini-split, including refrigerant frostbite, asphyxiation, and flammability hazards.

Select appropriate personal protective equipment and work-area controls for a mini-split inspection or maintenance task.

De-energize a mini-split, apply an appropriate personal isolation control, verify the absence of hazardous voltage, and confirm that capacitor or inverter DC-bus energy has dissipated before work begins.

Use current Mexican requirements, local rules, manufacturer instructions, and warranty terms to determine which electrical and refrigerant tasks may be performed personally and which require qualified or authorized service.