RAC Servicing (DomRAC) NC II study plan
RAC Servicing (DomRAC) NC II · Give each week a clear focus.
8 weeks · About 7 hours per week
Core: Servicing and Maintenance of Domestic Refrigeration and Air Conditioning Units & Core: Refrigerant Handling, Recovery, and Environmental Safety
Explain the refrigeration cycle (compression, condensation, expansion, evaporation) and identify each component on a split-type and a window-type unit
List the safety and environmental rules for handling R-32, R-410A, and R-290 refrigerants, including flammability, pressure, and venting prohibitions
Demonstrate the correct use of a manifold gauge set, vacuum pump, and refrigerant recovery machine in a supervised practice session
Describe the preventive maintenance schedule for evaporator coils, condenser coils, filters, and drain pans, and state the symptom each neglected task causes
Your checkpoint
A one-page service checklist for a split-type AC unit covering the full maintenance cycle plus a labeled diagram of the refrigeration cycle with component functions
Core: Servicing and Maintenance of Domestic Refrigeration and Air Conditioning Units & Core: Troubleshooting and Repair of Domestic Refrigeration and Air Conditioning Systems
Diagnose common cooling faults (low refrigerant charge, restricted capillary tube, dirty condenser, faulty capacitor) from pressure, temperature, and current readings
Measure superheat and subcooling on a running unit and state whether each reading indicates undercharge, overcharge, or restriction
Interpret electrical readings with a multimeter and clamp meter to isolate compressor, fan motor, and capacitor failures
Sequence the steps for recovering refrigerant before opening a sealed system, including recovery cylinder handling and weight recording
Your checkpoint
A fault-diagnosis table matching at least eight symptoms to probable causes, confirming measurements, and corrective actions
Core: Installation and Commissioning of Domestic Refrigeration and Air Conditioning Units & Core: Servicing and Maintenance of Domestic Refrigeration and Air Conditioning Units
Plan the installation of a split-type AC unit: site survey, load estimate, pipe routing, drain slope, and electrical requirements
Perform brazing with nitrogen purge and pressure-test a newly assembled line set to the specified test pressure
Evacuate a system to the target micron level and record the standing vacuum decay result
Commission a unit by charging to manufacturer specifications and verifying supply-air temperature differential and operating currents
Your checkpoint
A complete installation and commissioning worksheet for a 1.0-HP split-type unit with test pressures, vacuum readings, charge weight, and final performance readings
Core: Troubleshooting and Repair of Domestic Refrigeration and Air Conditioning Systems & Common Competencies (tools and equipment, measurement, materials handling, documentation)
Trace an electrical schematic of a domestic refrigerator and identify the defrost timer, thermostat, overload protector, and PTC relay in the circuit
Use a multimeter to test continuity, resistance, and insulation on a compressor winding set, and decide whether the compressor is serviceable
Select and inspect the correct tools for a repair job, checking calibration status and safe condition before use
Repair a simulated no-cool fault on a refrigerator by isolating the failed component and documenting the replacement
Your checkpoint
A written repair report for one refrigerator fault including the schematic trace, measured values, replaced part, and post-repair verification readings
Core: Troubleshooting and Repair of Domestic Refrigeration and Air Conditioning Systems & Core: Refrigerant Handling, Recovery, and Environmental Safety
Diagnose and correct a refrigerant leak using an electronic leak detector and soap-bubble confirmation, then repair and re-test the joint
Recover, recycle, and recharge refrigerant following the correct cylinder, scale, and hose-purge procedure while recording weights
Handle a simulated refrigerant release scenario: isolate the area, ventilate, use PPE, and follow reporting steps
Explain the legal and environmental obligations for refrigerant recovery, record keeping, and non-venting under current regulations
Your checkpoint
A refrigerant handling log for one complete recovery and recharge job showing starting weight, recovered weight, charged weight, and leak-test result
Basic Competencies (workplace communication, teamwork, safety, quality standards) & Common Competencies (tools and equipment, measurement, materials handling, documentation)
Write a clear customer service report describing a fault, the repair performed, and the parts used, in plain language
Deliver a short verbal handover to a teammate using standard technical terms and confirm understanding by asking them to repeat the key points
Apply 5S and workplace quality standards to a simulated work area, and identify unsafe conditions against a hazard checklist
Complete an equipment maintenance and calibration record for the meters and gauges used in earlier weeks
Your checkpoint
A customer-facing service report plus a completed hazard and 5S audit checklist for a simulated work area
Core: Installation and Commissioning of Domestic Refrigeration and Air Conditioning Units & Core: Troubleshooting and Repair of Domestic Refrigeration and Air Conditioning Systems
Install and commission a window-type or floor-mounted unit end to end within a set time limit, following the full procedure without a reference sheet
Troubleshoot three timed fault scenarios covering electrical, refrigerant, and airflow faults, and state the cause before confirming with a measurement
Verify final performance against manufacturer specifications and explain any deviation
Complete documentation for each job, including test results, parts used, and customer sign-off
Your checkpoint
Three timed fault scenarios resolved with a written cause-and-fix note for each, plus one full installation checklist completed under time pressure
Basic Competencies (workplace communication, teamwork, safety, quality standards) & Core: Servicing and Maintenance of Domestic Refrigeration and Air Conditioning Units & Core: Refrigerant Handling, Recovery, and Environmental Safety
Answer practice questions across all six domains and review every missed item until the underlying fact is explained in your own words
Recite the safety, refrigerant handling, and environmental rules from memory without notes
Run a full mock practical assessment covering maintenance, troubleshooting, and refrigerant recovery within the allotted time
Identify your three weakest areas and write a short revision plan for each
Your checkpoint
A mock exam score sheet by domain with a written revision plan for the three weakest areas
Milestones
Week 2: Can identify the cause of at least six of eight common cooling faults from gauge and meter readings alone, without hints
Week 4: Can trace a refrigerator electrical circuit and correctly decide whether a compressor is serviceable based on measured winding values
Week 6: Can complete a refrigerant recovery and recharge with accurate weight records and no venting, and explain the environmental rules unaided
Week 8: Scores at least 80 percent on the mock written exam and completes the mock practical assessment within the time limit with no safety violations