How do I set the Timer OFF function to automatically turn off the air conditioner?

Press the Timer button until the Timer OFF indicator displays and flashes, then press Temp + or Temp - to set the desired time period in hours. After 3 seconds, the TIMER OFF function will activate and the display will return to the temperature screen. For example, setting it to 5 hours will display '5.0h' and the unit will turn off after 5 hours. (Page 11)