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SYMPTOM TROUBLESHOOTING 07–03–7 07–03 2 INSPECT REFRIGERANT SYSTEM • Perform refrigerant system performance test. • Is operation normal? Yes Operation is normal. (Recheck malfunction symptoms.) No Go to next step. 3 CHECK TO SEE WHETHER MALFUNCTION • Are refrigerant high-pressure and low- Yes Go to next step. No Go to Step 6. 4 INSPECT BLOWER UNIT INTAKE • Is blower unit intake clogged? Yes Remove obstruction, then go to Step 20. (If air does not No Go to next step. 5 INSPECT CONDENSER • Inspect condenser. • Is it okay? Yes Adjust refrigerant to specified amount, then go to Step 20. No Replace condenser, or repair and clean condenser fins, 6 CHECK TO SEE WHETHER MALFUNCTION • Are refrigerant high-pressure and low- Yes Go to next step. No Go to Step 14. 7 CHECK TO SEE WHETHER MALFUNCTION • Immediately after A/C compressor operates, Yes Go to next step. No Go to Step 10. 8 CHECK TO SEE WHETHER MALFUNCTION • Turn A/C switch off and let air conditioner • Start engine. • Turn both A/C switch and fan switch on. • Does malfunction occur after A/C Yes Go to next step. No Replace receiver/drier and vacuum refrigerant line more 9 VERIFY THAT EXPANSION VALVE HEAT- • Is expansion valve heat-sensing tube within Yes Replace expansion valve, then go to Step 20. (Since valve No Install heat-sensing tube securely in proper position, then go 10 INSPECT REFRIGERANT LINES • Inspect refrigerant lines. (Visual inspection) — Are piping connections free of gas leakage? — Are piping installation points on condenser free of gas leakage? — Are piping installation points on receiver/ drier free of gas leakage? — Are piping installation points on A/C compressor free of gas leakage? — Are piping installation points on cooling unit free of gas leakage? — Perform gas leak inspection using gas leak tester. • Are above items okay? Yes Go to next step. No If piping or A/C component(s) are damaged or cracked, STEP INSPECTION ACTION 1712-1U-01G(07-03).fm 7 ページ 2001年6月29日 金曜日 午前10時19分 |