NANO

HVAC 851 HVAC INSPECTA/C COMPRESSOR OIL Is compressor oil darker than normal and contaminated with aluminum chips? VERIFYWHETHERMALFUNCTION IS IN A/C COMPRESSOR OR ELSEWHERE Is noise heard immediately after A/C compressor is stopped? INSPECT DRIVE BELT Inspect drive belt. Is it okay? INSPECT DRIVE BELTCONDITION Is drive belt worn? Does it have foreign material imbedded in it, or gave oil on it? INSPECTMAGNETICCLUTCH Inspect magnetic clutch. Is it okay ? VERIFYWHETHERMALFUNCTION IS IN A/C COMPRESSOR OR REFRIGERANT LINES Is noise emitted fromA/C compressor? VERIFY THAT MALFUNCTION SYMPTOMOCCURSAFTERREPAIR Has A/C compressor noise stopped? ReplaceA/C compressor and condenser, then go to Step 19 (SinceA/C compressor may be worn and receiver/drier may be clogged, replacement of receiver/drier is necessary.) Condition is normal. Recheck malfunction symptoms. ReplaceA/C compressor, then go to Step 19. (A/C compressor discharge valve left open) Go to next step. Go to next step. Adjust or replace drive belt, then go to Step 19. Remove obstruction, remove oil, or replace drive belt, then go to Step 19. Go to next step. Replace A/C compressor , go to Step 19. ReplaceA/C compressor, then go to Step 19. Visually inspect A/C compressor, replace appropriate parts if necessary, then go to next step. If noise is due to refrigerant lines, repair detached or missing clips, tighten loose bolts, then go to next step. Troubleshooting completed. Explain repairs to customer. Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs. Yes No Yes No Yes No Yes No Yes No Yes No Yes No 13 14 15 16 17 18 19 STEP INSPECTION ACTION