Inspection Procedure

NOISE


Inspection procedure

1.CHECK OPERATION
1. Operate the A/C system and check the operation. .
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 A/C piping (pipe, flexible hose): GO TO 6.
YES-5 - Noise from drive belt: GO TO 7.
NO - INSPECTION END
2.CHECK THE BLOWER MOTOR
1. Remove the blower motor.
2. Remove in-cabin microfilter.
3. Remove foreign materials that are in the blower unit.
4. Check the noise from the blower motor again.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace the blower motor.
3.REPLACE COMPRESSOR
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 compressor again.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace compressor.
4.CHECK WITH GAUGE PRESSURE
Perform the diagnosis with the gauge pressure. Trouble Diagnosis For Unusual Pressure.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace malfunctioning part.
5.REPLACE 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 symptoms solved?
YES - INSPECTION END
NO - Replace expansion valve.
6.CHECK A/C PIPING (PIPE, FLEXIBLE HOSE)
1. Check A/C piping (pipe, flexible hose) (for deformation and damage, etc.).
2. Check the installation condition of clips and brackets, etc. of A/C piping (pipe, flexible hose).
Is the inspection result normal?
YES - Fix the line with rubber or come vibration absorbing material.
NO - Repair or replace parts according to the inspection results.
7.CHECK DRIVE BELT
Check tension of the drive belt. Procedures.
Is the inspection result normal?
YES - Check the noise from compressor: GO TO 3.
NO - Adjust or replace drive belt according to the inspection results.