Refrigeration and Air Conditioning Technician (RACT)

Course Modules

Module 1: Basic Electrical & Refrigeration Fundamentals

• Basic electrical theory, electrical safety, and basic wiring for RAC.
• Refrigerant cycle system: components, functions, principles.
• Types of refrigerators: direct cool, single door, double door, visi cooler, deep freezer, water cooler.
• Identification and function of basic refrigeration components.
• Tools used in RAC: types, usage, pipe cutting, flaring, swaging, brazing, and introduction.

Module 2: Thermostat & Component Service Operations

• Working principle of thermostat; types and applications in refrigerators.
• Wiring and practical operation for single-door & double-door refrigerators.
• Inverter technology working principle & practical applications.
• Gas charging procedure for all RAC systems.
• Practical service operations: cooling coil change, compressor change, drier change, vacuum process, pressure leakage test, and brazing techniques.

Module 3: Frost-Free Refrigeration & Water Cooling Systems (100 Marks)

• Theory and working principle of a frost-free refrigerator.
• Practical wiring and troubleshooting of frost-free and inverter refrigerators.
• Deep freezer: theory, wiring diagram, fundamental operations, common problems & solutions.
• Water cooler fundamentals: cooling system, parts, wiring, common issues & their solutions.
• Preventive maintenance routine for frost-free, deep freeze, and water coolers.

Module 4: Visi Cooler & Air Conditioner Fundamentals (100 Marks)

• Theory and fundamental working of the visi cooler.
• Practical problems and solutions of the visi cooler.
• Types of Air Conditioners: Window AC, Split AC, Cassette AC – theory & practical.
• AC servicing basics: wiring, gas charging, leak testing, vacuuming.
• Component service: capacitor change, relay change, PCB basics in split & window AC.

Module 5: Inverter AC Systems, PCB Testing & Advanced Servicing (100 Marks)

• Inverter AC working principle, components, circuit explanation.
• Testing of air sensor, coil sensor, outdoor PCB, basic problem & solution.
• Wiring: inverter AC wiring, universal PCB wiring, cassette AC wiring.
• Practical servicing: condenser change, capillary change, service valve change.
• Voltage checking: indoor & outdoor PCB input/output testing and troubleshooting.