HVAC 36 c. 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 slippage noise Is there a squeaking or whirling sound (A/C compressor slippage noise)? Yes Go to Step 14. No Go to next step. 3 Inspect A/C compressor interference noise Is there a rattling or vibrating sound (Interference noise)? Yes Go to Step 18. No Go to next step. 4 Inspect magnetic clutch operation noise Is there clicking sound (Magnetic clutch operation noise)? Yes Adjust clearance between pressure plate of magnetic clutch and A/C compressor pulley, then go to Step 19. No Condition is normal. (Recheck malfunction symptoms.) 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. 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 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.
RkJQdWJsaXNoZXIy MTIwNTUz