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FATC
33
NOISE AND VIBRATION WHILE OPERATING A/C SYSTEM
TROUBLESHOOTING HINTS
•
Noise when compressor running at higher speed-Step 1-2
•
Vibration when compressor running at higher speed-Step 3
•
Hose or refrigerant line interference noise -Step 4.
STEP
INSPECTION
ACTION
1
Inspect oil quantity in the system. Check
oil leakage from any joint of Ac system
Yes
Top up correct grade and quantity of oil
No
Go to next step
2
Compressor mounting need to check.
Bracket mounting to be check.
Yes
Ensure proper tightening of all related fas-
tener
No
Replace AC compressor
3
Inspect AC compressor interface vibra-
tion.
Yes
Check damper condition. Bolt tightening
torque.
No
Go to next step
4
Inspect compressor Suction and Dis-
charge pipe. Mounting clamps and
rubber isolator.
Yes
Check compressor suction / discharge
pipe, Its rubber isolator
No
Go to next step
REFRIGERATION CYCLE TROUBLESHOOTING
Sr.
No.
OCCURANCE
POSSIBLE CAUSE
REMEDY
1
Insufficient refrigerant
Condition
•
Air conditioner does not cool effectively
Symptoms in refrigerant cycle
•
Pressure on both the high and low
pressure sides is low
•
Air around the air outlet is slightly cold
Cause
•
There is gas leakage in the refrigerating
cycle
Diagnosis
•
Insufficient refrigerant in the refrigerat-
ing cycle
•
Refrigerant leakage
Countermeasures
•
Locate the leakage and
repair
•
Recharge refrigerant to the
specified amount
Sr.
No.
OCCURANCE
POSSIBLE CAUSE
REMEDY