A) In case you are using a GGG2-WDS wired sensor:

Open GGG2 app EDIT -> CONFIG DEVICE -> DOORS.

If the sensor is installed in door 1 use cables out of terminals #7 and #8.

If the sensor is installed in door 2 use cables out of terminals #7 and #9.

If the sensor is installed in door 3 use cables out of terminals #7 and #10.

ALWAYS make sure you have chosen the right sensor type: WIRED (GGG2-WDS)

B) In case you are using a GGG2-TWS wireless:

Open GGG2 app EDIT -> CONFIG DEVICE -> DOORS.

ALWAYS make sure you have chosen (a) the right sensor type: WIRELESS (GGG2-TWS) and (b) you have introduce the sensor’s 4-Digit ID.

IMPORTANT: Be sure to place the sensor with the side arrows pointing toward the ceiling of the garage. With the door open, sensor must be in  completely horizontal position