HEXA

HVAC 36 3 NOISE WHILE OPERATING A/C SYSTEM TROUBLESHOOTING HINTS Magnetic clutch operation noise-Step 4 A/C compressor vane noise -Step 5-13 A/C compressor slippage noise -Step 14-17 Hose or refrigerant line interference noise -Step 18 1 Inspect a/c compressor vane noise Is there a jingling, popping, beeping, or buzzing sound (A/C compressor vane noise)? Yes Go to Step 5. No Go to next step. 2 Inspect a/c compressor slip- page noise Is there a squeaking or whirling sound (A/C com- pressor slippage noise )? Yes Go to Step 14. No Go to next step. 3 Inspect a/c compressor in- terference noise Is there a ratting or vibrating sound (Interference noise)? Yes Go to Step 18. No Go to next step. 4 Inspect magnetic clutch op- eration noise Is there clicking sound (Magnetic clutch operation noise)? Yes Adjust clearance between pressure plate of mag- netic clutch and A/C compressor pulley, then go to Step 19. No Condition is normal. ( Recheck malfunction symp- toms.) 5 Inspect a/c compressor noise time Is noise heard continuously for more than 3 seconds after A/C compressor comes on? Yes Go to next step, No Condition is normal. (Noise occurs for 2-3 seconds immediately after A/C compressor turns on.) 6 Inspect idle speed Is it okay? Yes Go to next step. No Adjust idle speed, then go to Step 19. 7 Inspect refrigerant amount Inspect refrigerant amount. See refrigerant system ser- vice procedures, refrigerant charge check Is it okay? Yes Go to Step 10. No Go to next step. 8 Inspect refrigerant line In- spect refrigerant lines. Yes Go to next step.