ATA SDO 2 Trio Manual

Setting Travel Limits

IMPORTANT NOTE: The OPERATE button will not function until the open and close limit positions are set.

NOTE: The door and shuttle must be engaged into the chain index. The door should be open approximately half way.

Setting Limits Positions
a. Remove the controls cover to access the controls panel as shown in (Fig. 25). Replace it when setup is completed.
b. Press and hold the MINUS (-) button to start the door closing. Release the button once you have reached your desired closed limit position (Fig 26).
c. Press the LIMIT SET button. This action will store the close limit position into memory.
d. Press and hold the PLUS (+) button to start the door opening. Release the button once you have reached your desired open limit position.
e. Read the WARNING below.

IMPORTANT WARNING: The garage door will automatically close, open and close again once the LIMIT SET button is pressed. Ensure there are no persons or objects in the door’s path before pressing the LIMIT SET button.

f. Press the LIMIT SET button to store into memory the open limit position. The door will now automatically close to its limit position then fully open to calculate the Safety Obstruction Forces
BE AWARE OF THE ABOVE WARNING.

The opener can now be operated via the OPERATE button.

Step 15.2 – Resetting Door Limit Positions
To enter new limit positions the existing settings must be deleted as follows:
a. Press and hold the LIMIT SET button (Fig. 27) for six (6) seconds, until you hear three beeps and the CLOSE LIMIT LED starts to flash.
b. Release the button.
c. Follow Step 15.1 to set new limit positions.