Aircon Installation and Repair Course

Lesson 1 • Workplace Safety and Regulatory Compliance

Establishes personal protective equipment use, lockout/tagout procedures, and regulatory compliance expectations. Safety practices introduced here apply to every hands-on activity in the course.

Lesson 2 • Refrigeration Cycle Principles

Covers heat transfer, phase change, and pressure-temperature relationships driving the refrigeration cycle. Establishes the thermodynamic foundation for all subsequent assembly and repair tasks.

Lesson 3 • AC System Types and Configurations

Distinguishes window, split, packaged, and VRF systems by design and application. Enables correct identification of system type before any assembly or diagnostic work begins.

Lesson 4 • Core Components and Their Functions

Identifies compressors, condensers, evaporators, and expansion devices and explains each component's role. Provides the component vocabulary needed for assembly, wiring, and repair chapters.

Lesson 1 • Hand Tools for AC Work

Covers wrenches, tube cutters, flaring tools, and swaging kits specific to refrigeration work. Correct tool selection prevents component damage during assembly and disassembly tasks.

Lesson 2 • Instrument Calibration and Maintenance

Establishes calibration schedules, zero-adjustment procedures, and storage practices for all test instruments. Accurate readings depend on properly maintained equipment throughout the technician's career.

Lesson 3 • Manifold Gauge Sets and Vacuum Pumps

Explains gauge set construction, hose colour coding, and vacuum pump operation for system evacuation. These instruments are used in every refrigerant handling and charging procedure.

Lesson 4 • Electrical Test Instruments

Covers multimeter, clamp meter, and megohmmeter use for voltage, current, resistance, and insulation testing. Electrical measurement skills underpin all wiring and motor diagnostic work.

Lesson 1 • Brazing Techniques and Filler Metals

Teaches torch setup, flux application, silver-alloy filler selection, and nitrogen purging during brazing. Nitrogen purging prevents internal oxidation that contaminates refrigerant circuits.

Lesson 2 • Cutting, Deburring, and Bending

Teaches precise tube cutting, internal deburring, and spring or lever bender use to produce clean bends. Proper preparation prevents contamination and stress cracks in refrigerant lines.

Lesson 3 • Flaring and Swaging Connections

Covers 45-degree flare creation, double-flare technique, and swaged socket joints for mechanical connections. These skills are essential where brazing is impractical or prohibited.

Lesson 4 • Pressure Testing and Leak Verification

Covers nitrogen standing pressure tests, hold-time requirements, and leak detection after piping completion. Verified leak-free piping is mandatory before refrigerant introduction.

Lesson 1 • Control Circuit Wiring

Explains 24-volt control circuits, thermostat wiring, and contactor coil connections for system control. Control circuit accuracy determines correct start, stop, and safety shutdown behaviour.

Lesson 2 • Motor and Compressor Electrical Connections

Covers run and start capacitor wiring, motor terminal identification, and compressor contactor connections. Correct motor wiring prevents premature failure and nuisance tripping.

Lesson 3 • Power Supply and Disconnect Requirements

Covers single-phase and three-phase supply identification, disconnect sizing, and overcurrent protection selection. Correct power supply setup protects equipment and ensures safe operation.

Lesson 4 • Reading Wiring Diagrams and Schematics

Teaches ladder diagrams, pictorial schematics, and component symbol interpretation for AC systems. Diagram literacy is the prerequisite for every wiring and troubleshooting task ahead.

Lesson 1 • Site Survey and Installation Planning

Covers load estimation, equipment placement, clearance requirements, and structural support assessment. Thorough planning prevents costly rework and ensures optimal system performance.

Lesson 2 • System Commissioning and Performance Verification

Covers startup checklists, airflow measurement, temperature differential checks, and operating pressure verification. Commissioning confirms the installed system meets design performance targets.

Lesson 3 • Mounting Indoor and Outdoor Units

Teaches bracket installation, vibration isolation, levelling, and condensate drain routing for both units. Proper mounting reduces noise, vibration, and water damage risks.

Lesson 4 • Refrigerant Line Set Installation

Covers line set routing, support spacing, insulation application, and wall penetration sealing. Correctly installed line sets maintain system efficiency and prevent moisture intrusion.

Lesson 1 • Electrical Fault Diagnosis

Teaches voltage drop testing, component resistance checks, and control board fault code interpretation. Electrical faults are the most common service call cause and require systematic testing.

Lesson 2 • Airflow and Mechanical Diagnostics

Covers static pressure measurement, blower motor testing, coil fouling assessment, and duct leakage identification. Airflow faults mimic refrigerant problems and must be ruled out first.

Lesson 3 • Compressor Failure Analysis

Identifies mechanical, electrical, and contamination-related compressor failures and their root causes. Correct failure analysis prevents repeat failures after compressor replacement.

Lesson 4 • Structured Diagnostic Approach

Introduces symptom collection, fault isolation logic, and elimination-based diagnostic frameworks. A structured approach reduces diagnostic time and prevents misdiagnosis-driven repairs.

Lesson 1 • Refrigerant Recovery Before Repair

Covers recovery machine operation, cylinder management, and refrigerant purity verification before component removal. Proper recovery is legally required and prevents environmental release.

Lesson 2 • Coil Cleaning and Replacement

Covers chemical coil cleaning, fin straightening, coil leak repair, and full coil replacement procedures. Clean coils restore heat transfer efficiency and reduce operating pressures.

Lesson 3 • Compressor Replacement Procedure

Teaches compressor removal, oil acid test, filter-drier replacement, and system flush when contamination is present. Skipping contamination cleanup causes premature failure of the new compressor.

Lesson 4 • Valve and Control Board Replacement

Covers TXV, reversing valve, and electronic expansion valve replacement plus control board swap procedures. Valve and board accuracy directly affects system efficiency and reliability.

Lesson 1 • Electrical Component Maintenance

Covers capacitor testing, contactor inspection, terminal tightening, and control board visual inspection during maintenance. Electrical maintenance prevents the most common in-season failure modes.

Lesson 2 • Airside and Mechanical Maintenance

Teaches coil cleaning, blower wheel cleaning, belt and bearing inspection, and condensate drain flushing. Airside maintenance restores system efficiency and prevents water damage.

Lesson 3 • Maintenance Planning and Scheduling

Covers seasonal maintenance timing, task prioritisation, and service agreement structure for residential and commercial systems. Planned maintenance reduces emergency call frequency and extends equipment life.

Lesson 4 • Refrigerant System Maintenance Tasks

Teaches operating pressure verification, refrigerant charge check, and filter-drier condition assessment during maintenance visits. Refrigerant system health checks catch developing faults before failure.