Lesson 1Estimating repair time and labour tasks for common AC fixesFigure out realistic times and labour for typical inverter AC jobs. Break down checks, taking apart, swapping parts, testing, and tidying up to quote labour spot-on and plan your day's work smartly.
Time estimates for standard diagnosticsTypical durations for common repairsAllowances for access and site conditionsPlanning visits and daily job schedulingLesson 2Parts priority and vehicle stocking: high-priority spares to carry vs order-only itemsDecide which AC spares to keep in your van for quick fixes. Sort high-priority, medium-priority, and order-only bits by how often they fail, cost, space, and how fast customers want their unit running.
Classifying high-priority fast-moving sparesMedium-priority and brand-specific partsOrder-only, bulky, or rare componentsOrganizing and labeling van inventoryReviewing stock based on past repairsLesson 3Safety, refrigerant regulations, and documentation practices for field repairsStick to safety rules and gas laws on job sites. Learn gear to wear, handling leaks, recovery and charging, labelling, and proper paperwork to keep compliant, safeguard clients, and protect our environment.
Personal protective equipment for AC workSafe handling of refrigerant cylindersLeak response and environmental dutiesRecovery, recycling, and charging rulesService reports and job documentationLesson 4Typical replacement parts and failure likelihoods for inverter ACs and fast diagnosticsSpot common weak spots in inverter ACs and test them fast. Pick up quick checks for boards, sensors, fans, and compressors to focus your work and cut time on each house call.
High-failure electronic and sensor componentsCommon fan motor and bearing problemsTypical compressor and start failuresQuick tests to confirm suspect partsUsing patterns from brand service historyLesson 5Common fault patterns: weak cooling, gurgling sounds, unit stopping after runtimeSpot typical inverter AC problems and match signs to causes. Study poor cooling, bubbling or hissing noises, and units cutting out after running, linking them to power, gas, or air flow issues.
Weak cooling with normal power consumptionGurgling or hissing sounds in pipingUnit stopping after short or long runtimeIntermittent cooling and random restartsPatterns linked to sensor or PCB issuesLesson 6Refrigeration checks with gauges and thermometer: static pressure, superheat/subcooling, refrigerant level diagnosisUse gauges and thermometers to check cooling system health. Do static and running pressure reads, superheat and subcooling measures, and gauge gas levels or blockages without overfilling.
Safe connection of gauges to service portsStatic pressure checks and what they showMeasuring running pressures correctlyCalculating superheat and subcoolingDiagnosing charge level and restrictionsLesson 7Preventive maintenance upsells specific to ACs: filter care, coil cleaning, refrigerant checks, and service contractsBuild solid, fair preventive checks for split inverter ACs. Cover filter and coil cleaning, drain clearing, basic gas checks, and how to pitch service plans that truly help customers.
Filter inspection, cleaning, and replacementIndoor and outdoor coil cleaning proceduresDrain pan and condensate line maintenanceBasic refrigerant health checks during serviceDesigning and pricing AC service contractsExplaining maintenance plans to customersLesson 8Presenting AC repair options and pricing to customers clearly and respectfullyLearn to share repair findings, choices, and costs plainly and politely. Practice explaining issues, repair levels, handling pushback, and noting approvals to earn lasting client trust.
Explaining diagnosis in simple languageOffering good, better, best repair optionsDiscussing parts, labor, and warranty termsHandling price objections professionallyDocumenting approvals and declined workLesson 9Understanding inverter AC systems: compressor types, PCB/inverter board, variable speed operationGrasp how inverter split ACs function for better troubleshooting. Study compressor kinds, boards and power units, speed changes, sensors, and how it adjusts power under various loads.
Fixed-speed vs inverter compressor basicsRole of the main PCB and inverter moduleHow variable speed controls capacityKey sensors and their functionsImpact of load and ambient on operationLesson 10Electrical tests with multimeter and clamp meter: supply checks, capacitor/function of fans, compressor current and run analysisSafely use multimeter and clamp meter on inverter ACs. Check power supply, capacitors, fan motors, compressor draw, and read results to find overloads, imbalances, or failing electrics.
Safety checks before live electrical testingMeasuring supply voltage and phase balanceTesting capacitors and fan motor windingsMeasuring compressor starting and running currentInterpreting abnormal current and voltage readingsLesson 11On-site visual checks and safety: leaks, frost, wiring, drainage, airflow, accessible componentsDo thorough visual inspections on site before deep tests. Check for leaks, ice buildup, wire damage, drain problems, air blocks, and access issues while staying safe around live gear and ladders.
Exterior inspection of indoor and outdoor unitsChecking for oil stains and refrigerant leaksIdentifying frost, ice, and airflow blockagesInspecting wiring, terminals, and insulationDrainage, leveling, and mounting checksSafe ladder and work area practicesLesson 12Confirming faults: isolating PCB vs sensor vs mechanical issues using step-by-step testsUse planned tests to pinpoint if faults are from boards, sensors, or mechanics. Follow isolation steps, double-check readings, and skip needless board or compressor swaps.
Reading and interpreting error codesTesting thermistors and pressure sensorsIsolating indoor vs outdoor PCB faultsDistinguishing electrical vs mechanical issuesAvoiding unnecessary board replacement
