Lesson 1Estimating repair time and labor tasks for common AC fixesFigure out real times and work needed for usual inverter AC repairs. Break down checking, taking apart, changing parts, testing, and cleaning up to give good quotes on work and plan your day well without rushing.
Time guesses for normal checksUsual times for common fixesExtra time for hard-to-reach spots and site issuesPlanning trips and daily work scheduleLesson 2Parts priority and vehicle stocking: high-priority spares to carry vs order-only itemsDecide which AC spare parts to keep in your vehicle for quick fixes. Learn to sort high-need, medium-need, and order-only items by how often they break, cost, space in the vehicle, and how fast customers want the repair done in our hot weather.
Sorting high-need fast-used sparesMedium-need and brand-only partsOrder-only big or rare piecesArranging and marking vehicle stockChecking stock from past fixesLesson 3Safety, refrigerant regulations, and documentation practices for field repairsFollow safety ways and rules for cooling gas during field fixes. Learn gear to protect yourself, handle leaks, rules for recovering and adding gas, marking, and good records to keep rules, protect customers, and care for our environment here.
Protective gear for AC jobsSafe way to handle cooling gas bottlesLeak fixing and nature care dutiesRecover, reuse, and add gas rulesRepair reports and job recordsLesson 4Typical replacement parts and failure likelihoods for inverter ACs and fast diagnosticsSpot usual parts that break easy in inverter ACs and quick tests for them. Learn short ways to check boards, sensors, fans, and compressors to focus checks and cut time on each service call in busy days.
High-break electronic and sensor partsCommon fan motor and bearing troublesUsual compressor and start breaksQuick tests to check bad partsUsing patterns from brand fix historyLesson 5Common fault patterns: weak cooling, gurgling sounds, unit stopping after runtimeKnow common inverter AC break patterns and match signs to causes. Study weak cooling, bubbling or hissing noises, and units that stop after running, then link each to electrical, cooling gas, or air flow problems.
Weak cooling with normal power useBubbling or hissing in pipesUnit stops after short or long runOn-off cooling and sudden startsPatterns from sensor or board issuesLesson 6Refrigeration checks with gauges and thermometer: static pressure, superheat/subcooling, refrigerant level diagnosisUse cooling gauges and thermometers to check system health. Learn still and running pressure tests, superheat and subcooling measures, and judge cooling gas level and blocks without adding too much.
Safe link of gauges to service spotsStill pressure checks and what they meanRight way to measure running pressuresCalculate superheat and subcoolingCheck gas level and blocksLesson 7Preventive maintenance upsells specific to ACs: filter care, coil cleaning, refrigerant checks, and service contractsBuild good and fair preventive care routines for split inverter ACs. Learn filter and coil care, drain cleaning, basic gas checks, and how to offer and explain service plans that help customers in our dusty places.
Filter check, clean, and changeIndoor and outdoor coil clean waysDrain pan and water line careBasic gas health checks in serviceMake and price AC service plansExplain care plans to customersLesson 8Presenting AC repair options and pricing to customers clearly and respectfullyLearn to show repair findings, choices, and prices in clear, true, and kind way. Practice explaining breaks, offering repair levels, handling no's, and recording yes's to build long trust with customers.
Explain check in easy wordsOffer good, better, best repair choicesTalk parts, work, and warranty termsHandle price no's wellRecord yes's and no's on workLesson 9Understanding inverter AC systems: compressor types, PCB/inverter board, variable speed operationKnow how inverter split AC systems work so checks make sense. Study inverter compressor kinds, PCB and power parts, changing speed work, sensors, and how system adjusts power and draw under different loads like our varying heat.
Fixed-speed vs inverter compressor basicsMain PCB and inverter part rolesHow changing speed controls powerKey sensors and their jobsLoad and outside heat effect on workLesson 10Electrical tests with multimeter and clamp meter: supply checks, capacitor/function of fans, compressor current and run analysisLearn safe use of multimeter and clamp meter on inverter ACs. Check supply power, capacitors, fan motors, compressor current, and read to find overload, unbalance, or bad electrical parts.
Safety checks before live power testMeasure supply power and balanceTest capacitors and fan motor wiresMeasure compressor start and run currentRead odd current and power signsLesson 11On-site visual checks and safety: leaks, frost, wiring, drainage, airflow, accessible componentsDo steady on-site look checks before deep tests. Check for leaks, frost, wire damage, drain problems, air blocks, and reach issues while keeping safe around live gear and steps.
Outside look at indoor and outdoor unitsCheck oil marks and gas leaksSpot frost, ice, and air blocksLook at wires, ends, and coversDrain, level, and mount checksSafe step and work area waysLesson 12Confirming faults: isolating PCB vs sensor vs mechanical issues using step-by-step testsUse planned tests to confirm if breaks come from PCB, sensors, or machine parts. Follow step-by-step ways to sort, cross-check reads, and skip unneeded board or compressor changes.
Read and understand error codesTest heat sensors and pressure sensorsSort indoor vs outdoor PCB breaksTell electrical vs machine issuesSkip unneeded board change
