Samsung AC140MXAD*H - The Whistling Noise from the Indoor Unit in Low Wind Mode

Troubleshooting
4-32
4-4-8. The whistling noise from the indoor unit in low wind mode
No
Is there abnormal noise like the whistling
from the indoor unit in low wind mode?
Replace a fan a motor.
ĺCheck normal startupĺ End the service
Is there abnormal noise in the booster fan?
No
Check normal startup
Replace a fan a motor.
ĺCheck normal startupĺ End the service
Yes
Is there abnormal noise in a fan or a motor?
Yes
Yes
[Booster Fan]