Chamberlain Garos CS 300 Operating Instructions Manual page 33

Operating mode : ADJUSTMENT
In the ADJUSTMENT mode, the OPEN/CLOSED end position settings are adjusted.
Warning!
In the ADJUSTMENT mode of operation, the drive does not switch off when the end position is reached. The door
can be damaged if driven beyond the end position.
LED displays:
H H
6.3 Setting the end positions
Setting the OPEN end position
Change the mode of operation to ADJUSTMENT by pressing the (P) button.
Drive the door into the desired OPEN end position by pressing the (+) button.
Save the end position by pressing simultaneously the (P) button and the (+) button.
Setting the CLOSED end position
Change the mode of operation to ADJUSTMENT by pressing the (P) button.
Drive the door into the desired CLOSED end position by pressing the (-) button.
Save the end position by pressing simultaneously the (P) button and the (-) button.
Status
The OPEN end position is programmed at this door position.
The CLOSED end position is programmed at this door position.
The CLOSED and OPEN end positions are not programmed at this door position.
CS 300 Gate Controls / Rev. 5.3 - 
GB