A018I-09C Local Air Conditioner 9000BTU

This one’s a 9000 and gone down too. We had the 7500 https://www.screwfix.com/p/blyss-a018i-09c-local-air-conditioner-9000btu/730XG?tc=BA5&gclsrc=aw.ds&ds_rl=1241687&ds_rl=1245250&ds_rl=1249404&gad_source=1&gad_campaignid=837555045&gbraid=0AAAAAD8IdPw3kfQ7yrCNLeSta3YjKVkq7&gclid=Cj0KCQjw64jDBhDXARIsABkk8J5GzySwQr6CobRqswffU-o0NFZKPTxhdU4Mo6H6peBiEyo8ogz13AQaAhztEALw_wcB

I've just bought this model, my first ever unit. Just a quick question to make sure this is normal when it's running. When in cooling mode and the temp is set to say 18 degrees, initially I can hear the fans running on the unit and can switch between the 3 fan speeds and hear the increase in air flow, then after approximately 1-2 minutes it sounds like something kicks in and the noise level goes up quite a bit. Do you know if this is normal for the unit?

Thanks for your quick reply. I was thinking, "That's not too loud" and then it kicked in and I realised why people go on about the noise 😂