If you need the indoor unit to initially switch ON then:
- Close the circuit between S1 and its repsetive 0V terminal (to the left of S1 terminal)
- Set DIP switch 1 to ON position.
If Input S1 is Open-Circuit then the unit will be locked OFF and will not operate except during Unoccupied Temperature Protection. If Input S1 is Closed-Circuit then the unit can be switched on by the User.
For further information please see: