- Perform systematic diagnostics on multiplex rack systems and standalone commercial refrigeration units
- Analyze suction pressure, discharge pressure, superheat, and subcooling to identify system faults
- Interpret P-T chart data for common commercial refrigerants including R-404A and R-507
- Diagnose common commercial refrigeration failures including low charge, restriction, and compressor problems
- Service and troubleshoot electric, hot gas, and off-cycle defrost systems in walk-in units
- Diagnose door heater failures and gasket deterioration that cause ice buildup and energy waste
- Evaluate insulation integrity and identify moisture infiltration in walk-in panels
- Calibrate temperature controls and verify proper operation of safety devices
Ready to test your knowledge?
Take the practice exam to see how well you've mastered the material.
Ready to test your knowledge?
Take the practice exam to see how well you've mastered the material.
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