Basic Refrigeration and Troubleshooting - Rev2

Explore foundational concepts in basic refrigeration and troubleshooting and see how the course structures lessons with overviews, objectives, videos, and quizzes, including retake options for achieving 80 percent.

Explore heat energy and its sun-derived sources, and how excess heat challenges refrigeration in buildings and transport. Build foundational knowledge to solve real refrigeration problems in the field.

Trace the history of refrigeration from ancient ice blocks to early ice boxes and electric refrigerators, and learn how insulation slows heat transfer per the second law of thermodynamics.

Trace the history of refrigeration from Cullen to Freon, note CFCs and Montreal Protocol, and preview the key components and the refrigeration cycle.

Learn key refrigeration components, including Skrull and semi hermetic compressors, condensers, the thermal expansion valve, evaporators, fans, pumps, and the essential controls and safeties for residential, commercial, and automotive systems.

Explore the refrigeration compressor, focusing on scroll and semi hermetic types, how they draw in and compress refrigerant gas, and how their components and windings influence the refrigeration cycle.

Explore how condensers in a refrigeration cycle reject heat, comparing air cooled and water cooled types, including air flow with a fan and heat transfer to a cooling tower.

Discover how a thermal expansion valve meters refrigerant into the evaporator. Using a sensing bulb and power head, it dynamically adjusts flow with suction line temperature and pressure.

Explore the evaporator as the heat-absorbing counterpart to the condenser, noting its shapes and role in the refrigeration cycle, and preview fans and centrifugal pumps for heat transfer.

Explain how heat moves in and out of the refrigeration cycle using fans for air conditioning and pumps for processed chillers, including propeller and squirrel cage blower types.

Identify thermostatic controls that turn the refrigeration cycle on and off based on evaporator temperature, and recognize high and low pressure safeties that shut down cooling to prevent damage.

Explore how the key components of the refrigeration system come together in the refrigeration cycle, and uncover what happens inside this miracle of engineering.

Learn how refrigerants move heat through the cycle under the second law, trigger state changes, and how a compressor, condenser, expansion valve, evaporator, fans, pumps, and safety controls interact.

Explore the refrigeration cycle and refrigerant state changes, guided by the second law of thermodynamics. See how condenser, evaporator, compressor, and metering device move heat through the cycle.

Explore the history of refrigeration, identify key components, explain what refrigerants are, and how they move heat energy, while linking the second law of thermodynamics to future troubleshooting.

Explore the pressure temperature relationship within the refrigeration cycle and learn how to use tp charts to diagnose systems, measure pressures and temperatures, and troubleshoot in the field.

Review the refrigeration cycle from compressor to evaporator, detailing heat transfer, state changes, and the temperature pressure relationship in the condenser and evaporator for 407 c refrigerant.

Learn how superheat and sub cooling guide you toward becoming an expert refrigeration system troubleshooter, and why the TP chart temperatures may not match digital thermometer readings.

Master evaporator superheat measurement and troubleshooting by reviewing the refrigeration cycle, learning to measure temperature and pressure, and identifying factors that affect superheat and compressor risk.

Apply basic refrigeration troubleshooting to a real system, diagnosing common problems by measuring superheat and subcooling, and assessing heat load, metering devices, and refrigerant charge in evaporator and condenser.

Identify key components of a five-ton package process chiller—compressor, condenser, liquid line filter dryer, sight glass, expansion valve, evaporator, suction line, accumulator—and outline refrigerant flow and basic diagnostics with gauges.

Analyze a heat load issue in a chiller evaporator using superheat, cooling readings, sub cooling, and suction/discharge pressures to diagnose flow restrictions and fouling.

Diagnose condenser heat rejection issues in a heat load scenario using superheat and subcooling readings, inspect condenser fins and fan motor condition, and apply practical diagnostics for reliable refrigeration performance.