Aircon Installation and Repair Course

Lesson 1 • Refrigerants: Properties and Selection

Examines refrigerant classifications, global warming potential, and selection criteria. Prepares students to choose appropriate refrigerants for given system designs.

Lesson 2 • Refrigeration Cycle Principles

Covers heat transfer, phase change, and the vapour-compression cycle. Establishes the thermodynamic foundation required for all subsequent assembly and maintenance tasks.

Lesson 3 • Core Components Overview

Identifies compressors, condensers, evaporators, and expansion devices. Connects each component's function to its role in the refrigeration cycle.

Lesson 4 • AC System Types and Configurations

Surveys split, packaged, mini-split, and central systems. Students match system type to application requirements and recognise configuration differences.

Lesson 1 • Diagnostic and Measurement Instruments

Introduces manifold gauge sets, thermometers, anemometers, and multimeters. Connects accurate measurement to reliable system diagnosis and performance verification.

Lesson 2 • Refrigerant Handling Equipment

Covers recovery machines, vacuum pumps, and refrigerant cylinders. Students handle refrigerant safely and comply with environmental handling standards.

Lesson 3 • Workspace Organisation and Safety Setup

Establishes tool storage, hazard labelling, and ventilation requirements for AC work areas. Organised workspaces reduce errors and improve technician efficiency.

Lesson 1 • Pressure Testing and Leak Detection

Teaches nitrogen pressure testing, electronic leak detection, and bubble solution methods. Students confirm system tightness before refrigerant charging.

Lesson 2 • Brazing and Soldering Refrigerant Lines

Introduces torch operation, filler metal selection, and nitrogen purging during brazing. Proper brazing prevents oxidation scale inside refrigerant circuits.

Lesson 3 • Mechanical Fittings and Compression Joints

Covers flare nuts, compression fittings, and quick-connect couplings. Students apply correct torque and verify joint integrity without brazing equipment.

Lesson 4 • Copper Tube Cutting and Preparation

Teaches precise cutting, deburring, and cleaning of copper tubing. Proper preparation prevents contamination and ensures strong, leak-free joints.

Lesson 1 • Motor and Compressor Wiring

Covers fan motor, compressor, and capacitor wiring procedures. Correct wiring ensures proper motor rotation and prevents premature component failure.

Lesson 2 • Control Circuit and Thermostat Wiring

Teaches low-voltage control wiring, thermostat terminal assignments, and control board connections. Proper control wiring enables accurate temperature regulation.

Lesson 3 • Electrical Testing and Fault Identification

Applies multimeter and clamp meter techniques to measure voltage, current, and resistance. Students isolate open circuits, shorts, and failed components systematically.

Lesson 4 • Reading AC Electrical Diagrams

Covers schematic symbols, ladder diagrams, and wiring diagram conventions. Accurate diagram reading is the prerequisite for all electrical assembly and fault-finding tasks.

Lesson 1 • System Evacuation and Refrigerant Charging

Covers deep vacuum procedure, moisture removal verification, and refrigerant charging by weight and superheat. Correct charging is critical to efficiency and equipment life.

Lesson 2 • Refrigerant Line Routing and Insulation

Covers line set routing, support spacing, and foam insulation application. Proper insulation prevents condensation and maintains system efficiency.

Lesson 3 • Site Survey and Installation Planning

Covers load estimation, unit placement, and structural support assessment. Thorough planning prevents installation errors and ensures optimal system performance.

Lesson 4 • Mounting Indoor and Outdoor Units

Teaches bracket installation, levelling, and vibration isolation for both unit types. Correct mounting reduces noise, vibration, and structural stress.

Lesson 5 • Condensate Drain System Installation

Teaches drain pan, trap, and drain line installation with correct slope. Proper drainage prevents water damage and microbial growth inside units.

Lesson 1 • Mechanical Component Inspection

Covers fan blade, belt, bearing, and motor inspection procedures. Early detection of wear prevents unexpected failures and costly downtime.

Lesson 2 • Filter and Coil Cleaning Procedures

Teaches filter inspection, replacement, and coil cleaning with appropriate chemicals. Clean filters and coils restore airflow and heat transfer efficiency.

Lesson 3 • Electrical System Maintenance Checks

Covers terminal tightening, capacitor testing, contactor inspection, and control board review. Electrical maintenance prevents nuisance trips and component burnout.

Lesson 4 • Maintenance Scheduling and Documentation

Covers maintenance interval planning, service log creation, and work order management. Structured documentation supports warranty compliance and performance trending.

Lesson 1 • Diagnosing Refrigerant System Faults

Covers low charge, overcharge, restriction, and non-condensable gas symptoms. Students interpret pressure and temperature data to pinpoint refrigerant circuit problems.

Lesson 2 • Structured Troubleshooting Methodology

Introduces symptom-based diagnosis, fault isolation logic, and root cause analysis. A systematic approach reduces diagnostic time and prevents repeat failures.

Lesson 3 • Diagnosing Electrical and Control Faults

Covers compressor lockout, failed capacitors, faulty contactors, and control board errors. Students use test instruments to confirm electrical faults before replacing components.

Lesson 4 • Component Replacement and System Restoration

Guides safe component removal, correct replacement, and post-repair verification. Proper restoration procedures confirm the fault is resolved and the system is fully operational.

Lesson 1 • Refrigerant Charge Optimisation

Applies superheat, subcooling, and manufacturer charging charts to achieve optimal charge. Correct charge improves efficiency and prevents compressor damage.

Lesson 2 • Airflow Balancing and Duct Optimisation

Teaches static pressure measurement, damper adjustment, and duct sealing techniques. Balanced airflow maximises comfort and reduces blower energy consumption.

Lesson 3 • Variable Speed and Inverter Technology

Examines inverter-driven compressors and variable-speed fan motors. Students configure and verify inverter systems for maximum part-load efficiency.

Lesson 4 • Energy Audit and Improvement Planning

Guides energy consumption measurement, loss identification, and improvement prioritisation. Students produce actionable efficiency improvement plans for existing installations.