It depends. If you are leaving your home for an extended period of time, such as a vacation, then it is a good idea to turn off your mini-split unit.
However, if you are only leaving your home for a short period of time, such as a day trip, then it is not necessary to turn off your unit. In fact, turning off your unit too often can actually increase your energy bills in the long run.
Here are some tips for using your mini-split unit efficiently:
Set the thermostat to a comfortable temperature and let the unit run continuously.
Close the vents in rooms that you are not using.
Use the timer function to turn off the unit when you are asleep or away from home.
Clean the filters regularly to improve efficiency.
By following these tips, you can save energy and money on your heating and cooling costs.