Without 7 Inch Display

NOISE


Description


Symptom
- Noise
- Noise is heard when the A/C system operates.




NOISE


Diagnosis Procedure

1.CHECK OPERATION
1. Operate the A/C system and check the operation. Refer to Without 7 Inch Display.
2. Check the parts where noise is occurring.
Can the parts where noise is occurring be checked?
YES-1 - Noise from blower motor: GO TO 2.
YES-2 - Noise from compressor: GO TO 3.
YES-3 - Noise from expansion valve: GO TO 4.
YES-4 - Noise from cooler piping (pipe, flexible hose): GO TO 6.
YES-5 - Noise from drive belt: GO TO 7.
NO - INSPECTION END
2.CHECK BLOWER MOTOR
1. Remove blower motor.
2. Remove foreign materials that are in the blower unit.
3. Check the noise from blower motor again.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace blower motor.
3.CHECK COMPRESSOR
Perform trouble diagnosis for the compressor and check the compressor. Refer to Symptom Table.
Is the inspection result normal?
YES - INSPECTION END
NO - Refill the refrigerant or replace the compressor depending on the inspection results.
4.CHECK WITH GAUGE PRESSURE
Perform the diagnosis with the gauge pressure. Refer to Trouble Diagnosis For Unusual Pressure.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace parts depending on the inspection results.
5.CHECK EXPANSION VALVE
1. Correct the refrigerant with recovery/recycling recharging equipment.
2. Recharge with the proper amount of the collected refrigerant after recycling or new refrigerant.
3. Check for the noise from expansion valve again.
Are the malfunction solved?
YES - INSPECTION END
NO - Replace expansion valve.
6.CHECK COOLER PIPING (PIPE, FLEXIBLE HOSE)
1. Check the cooler piping (pipes, flexible hoses) (for deformation and damage, etc.).
2. Check the installation condition of clips and brackets, etc. of the cooler piping (pipes, flexible hoses).
Is the inspection result normal?
YES - Fix the line with rubber or come vibration absorbing material.
NO - Repair or replace parts depending on the inspection results.
7.CHECK DRIVE BELT
Check tension of the drive belt. Refer to Procedures.
Is the inspection result normal?
YES - Check the noise from the compressor: GO TO 3.
NO - Adjust or replace drive belt depending on the inspection results.