AC makes mosquito like buzzing noise

Hi all, I'm sorry if this is the wrong space to post this, I'm just kinda desperate atm after looking up 40 AC noises and not finding the same as my problem lol

Basically, I moved into this unit two weeks ago and noticed the AC makes this quiet, mosquito like noise with one second breaks while it's running. It's quiet when it's off.

The sound isn't very loud so during the day it may not bother me but at night it's very annoying. Also the sound stopped for a few days and now restarted again.

I'm just an exchange student in Japan and as an European I don't know much about ACs. The company that is renting me this place isn't very helpful because of the language barrier so I was hoping I could fix this myself. Any thoughts?

Many thanks!

(I'm trying to link a recording of it, not sure if it works https://packaged-media.redd.it/25pjmyr4q8jd1/pb/m2-res_1920p.mp4?m=DASHPlaylist.mpd&v=1&s=c2e7e72902a3c88138e02c06d53ba2a064df338a#t=0

by Parking-Rent-3634

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