Garage door openers have a quick release mechanism that allows you to operate the garage door manually in the event you lose power. The carriage is the part of the opener to which the door arm connects. The carriage locks around the opener trolley during normal operation. Once the power comes back on it is necessary to reengage a garage door opener to the door. The process is generally the same among all the garage door opener manufacturers.
Pull the emergency release rope toward the opener motor head. This prevents the carriage from reconnecting to the opener rail trolley, allowing full manual operation of the door.
Raise the garage door fully. Pull straight down on the emergency release rope once the door is open. This enables the trolley to connect to the carriage.
Push the control button either on a remote or at the wall station to operate the garage door opener. The opener trolley will engage the carriage once it comes to the full open position. It might be necessary to pull the door closed slightly to fully engage the trolley.