We usually sleep with the air con and a fan on "pulse" but with increasing temperatures we are often waking in the heat and using the air con for a bit to cool the room down. It's no problem, switch it on, doze off and when you feel to cold, wake up and switch it off.
The only problem is that it makes an infuriating "beeping" noise every time you use the remote which can and does, wake up the other person.
Recently we picked up a replacement remote that looks identical to the original Samsung one but is a copy and it works a charm. A good deal too at around a fiver.
Anyway, I was looking at the unit and noticed a "second function" key, along with a button marked "beep". Pressing both has now rendered both air con units silent, even when using the original remote controls.