The repeated signal tone in a different pitch (a sequence of 9 short tones that sound before the single (lower) ‘armed’ signal tone) is an indication of the ventilation function.
Through it, WiPro warns you that one or more wireless magnetic contacts are open when you are locking the vehicle. The system is armed and monitors all closed contacts, but the ones that are already open are ignored or excluded from the circuit until the next locking operation. If you want to close the open windows/doors again, you don’t have to disarm/unlock. As soon as you have closed the corresponding openings, they are monitored again by the system after a 4-second delay.