STEP INSPECTION ACTION No Adjust idle speed, then go to Step 19. 7 Inspect refrigerant amount Inspect refrigerant amount. See refrigerant system service procedures, refrigerant charge check Is it okay? Yes Go to Step 10 No Go to next step. 8 Inspect refrigerant line Inspect refrigerant lines. Is piping free of damage and cracks? Are piping connections free of oil grime? (Visual Inspection) Are piping connections free of gas leakage? Are piping installation points on condense free of gas leakage? Are piping installation points on receiver/drier free of gas leakage? Are piping installation pints 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) is damaged or cracked, replace then go to Step 19.If there is gas leakage, repair or replace connection and replace condenser, then go Step 19 9 Inspect evaporator piping connections in cooling unit for gas leakage Are piping connections for evaporator in cooling unit free of gas leakage? Yes Adjust refrigerant amount to specified level, then go to Step 19. No If piping damaged or cracked, replace then go to Step 19. If there is gas leakage, repair or replace connection and replace condenser then go to Step 19. 10 Verify whether malfunction is in compressor oil or elsewhere Add 30 ml of compressor oil. Is noise heard when compressor rpms are increased? Yes Go to next step No Troubleshooting completed. Explain repair to customer. 11 Verify whether malfunction is in a/c compressor or Yes Go to next Step FATC 49
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