Why is my air conditioner making sounds?

[Shervan360]

Hello,

I bought an air conditioner 24000 btu Inverter. The indoor unit makes strange noises/sounds at night.

The pattern is as follows:
First, wind blowing and cooling are reduced to 80%. (Similar to fan mode)
Then the sound (sound in the video) comes a few times and then everything returns to normal.
Wind blowing and cooling will be normal and will not be a problem.
No sound comes out of the unit.
Please watch the video.
thank you

 

[Shervan360]

Also, when I turn on the air conditioner, it emits a bad smell for the first 1-2 minutes. It does not smell bad after 2 minutes. (The AC is new)