Lesson 1Estimating repair time and labor tasks for common AC fixesEstimate realistic repair times and labor tasks for common inverter AC jobs. Break down diagnostics, disassembly, part replacement, testing, and cleanup so you can quote labor accurately and schedule your daily workload efficiently.
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 spare parts to keep in your vehicle for fast repairs. Learn to classify high-priority, medium-priority, and order-only items based on failure rates, cost, storage space, and how quickly customers expect the repair completed.
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 repairsFollow safety rules and refrigerant regulations during field repairs. Learn personal protective equipment, leak handling, recovery and charging rules, labeling, and accurate documentation to stay compliant and protect customers and the 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 diagnosticsIdentify typical failure-prone parts in inverter ACs and how to test them quickly. Learn fast diagnostic shortcuts for PCBs, sensors, fans, and compressors so you can prioritize checks and reduce time spent 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 runtimeRecognize common inverter AC fault patterns and link symptoms to likely causes. You will study weak cooling, gurgling or hissing sounds, and units that stop after some runtime, then map each pattern to electrical, refrigerant, or airflow 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 diagnosisApply refrigeration gauges and thermometers to evaluate system health. Learn static and running pressure checks, superheat and subcooling measurement, and how to judge refrigerant level and restrictions without overcharging the system.
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 contractsDevelop profitable and ethical preventive maintenance routines for split inverter ACs. Learn filter and coil care, drain cleaning, basic refrigerant checks, and how to package and explain service contracts that add value for 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 how to present repair findings, options, and prices in a clear, honest, and respectful way. You will practice explaining faults, offering repair tiers, handling objections, and documenting approvals to build long-term customer 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 operationUnderstand how inverter split AC systems work so diagnostics make sense. Study inverter compressor types, PCB and power modules, variable speed operation, sensors, and how the system modulates capacity and current draw under different 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 analysisLearn how to safely use a multimeter and clamp meter on inverter ACs. You will check supply voltage, capacitors, fan motors, compressor current, and interpret readings to detect overload, imbalance, or failing electrical components.
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 componentsPerform systematic on-site visual checks before deeper testing. You will inspect for leaks, frost, wiring damage, drainage issues, airflow blockages, and access problems while following safe work practices around live equipment 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 structured tests to confirm whether faults come from the PCB, sensors, or mechanical components. You will follow step-by-step isolation methods, cross-check readings, and avoid unnecessary board or compressor replacement.
Reading and interpreting error codesTesting thermistors and pressure sensorsIsolating indoor vs outdoor PCB faultsDistinguishing electrical vs mechanical issuesAvoiding unnecessary board replacement
