2 Safe Service Preparation and Diagnostics Free Online FlashCards

How should you identify an appliance’s refrigerant?

Identify it from the nameplate, service records, and manufacturer documentation; never guess or identify it from pressure alone.

When is Section 608 certification generally required?

Section 608 certification is generally required when service could reasonably be expected to release refrigerant. Type II covers high- and very-high-pressure appliances, with stated exceptions.

What hazards should you assess before approaching an appliance?

Check for leaks, poor ventilation, ignition sources, wet surfaces, moving fans, hot surfaces, and electrical or confined-space hazards.

What steps help prevent unexpected startup during service?

Isolate relevant energy sources, apply lockout/tagout when required, and verify that the equipment cannot start unexpectedly. Consider stored energy too.

How should a face shield be worn?

A face shield is worn over primary eye protection when needed; it does not replace it.

What requirements apply to pressure instruments and hoses?

Choose instruments, hoses, and fittings rated for the expected pressure and compatible with the refrigerant and connections.

What kind of checks should begin initial diagnostics?

Begin with observations and checks that do not disturb the refrigerant circuit, such as assessing airflow, controls, and obvious obstructions.

What must be confirmed before taking refrigerant-circuit measurements?

Confirm refrigerant identity, port and instrument compatibility, pressure ratings, PPE, ventilation, and the applicable service procedure before connecting equipment.

Why is a pressure reading alone insufficient for diagnosis?

A pressure reading alone is not a complete diagnosis. Interpret it alongside refrigerant identity, operating conditions, instrument accuracy, and manufacturer service data.

What should you do when service conditions are uncertain or unsafe?

Stop when refrigerant identity, atmosphere, equipment condition, or a safe procedure is uncertain. Make the area safe and consult a qualified supervisor or the manufacturer.

What supervision do apprentices need during refrigerant service?

Apprentices must be closely and continually supervised by a certified technician.

What should you do if a significant refrigerant leak is suspected?

Do not enter or remain where the atmosphere may be unsafe. Keep others clear, follow the site emergency plan, and obtain qualified help.