Lesson 1Estimating repair time and labour tasks for common AC fixesFigure out realistic repair times and labour for typical inverter AC jobs. Break down diagnostics, disassembly, part swaps, testing, and cleanup to quote labour spot-on and manage your daily schedule 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 itemsPlan which AC spares to stock in your van for quick fixes. Sort high-priority, medium-priority, and order-only items by failure rates, cost, space, and how fast customers want repairs done.
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 norms and refrigerant rules during on-site repairs. Master PPE, leak management, recovery and charging guidelines, labelling, and proper paperwork to stay compliant and safeguard customers and 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 failure parts in inverter ACs and test them swiftly. Pick up quick diagnostic tricks for PCBs, sensors, fans, and compressors to prioritise checks and cut time on each service 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 runtimeIdentify typical inverter AC fault signs and match them to causes. Study poor cooling, gurgling or hissing noises, and units halting after running, linking each to electrical, refrigerant, or airflow problems.
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 refrigeration gauges and thermometers to check system condition. Learn static and running pressure tests, superheat and subcooling readings, and assess refrigerant levels and blockages without overcharging.
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 profitable yet honest preventive maintenance for split inverter ACs. Cover filter and coil upkeep, drain clearing, basic refrigerant checks, and pitch service contracts that truly benefit 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 respectfullyMaster presenting repair findings, choices, and costs clearly and politely. Practice explaining faults, repair levels, tackling objections, and noting approvals to earn lasting customer faith.
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 diagnostics. Explore inverter compressor varieties, PCB and power modules, variable speed running, sensors, and capacity modulation under varying 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 supply voltage, capacitors, fan motors, compressor current, and read values to spot overloads, imbalances, or failing electrical bits.
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 on-site visual inspections before deep tests. Check for leaks, frost, wiring damage, drainage woes, airflow blocks, and access issues while keeping 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 testsConfirm faults with structured tests to pinpoint PCB, sensor, or mechanical issues. Follow isolation steps, cross-verify readings, and skip needless board or compressor replacements.
Reading and interpreting error codesTesting thermistors and pressure sensorsIsolating indoor vs outdoor PCB faultsDistinguishing electrical vs mechanical issuesAvoiding unnecessary board replacement
