Operation of Your Opener

Activate the opener with any of the following:

•The Remote Control: Hold push button down until the door starts to move.

•The Door Control: Hold push button down until the door starts to move.

•The Outdoor Key Switch or Keyless Entry. (See Accessories)

When the opener is activated with the safety reversing sensor installed and correctly aligned:

Weak or broken sp/_ngs could allow an open door to fall (either rapidly or unexpectedly), resulting in serious injury, death or property

damage. If possible, use the emergency release rope and handle onlywhen the door is fully closed.

1.If open, the door will close. If closed, the door will open.

2.If closing, the door will reverse.

3.If opening, the door will stop (allowing space for entry and exit of pets and for fresh air).

4.If the door has been stopped in a partially open position, it will close.

5.If obstructed while closing, the door will reverse.

6.If obstructed while opening, the door will stop.

7.The garage door will reverse in the closing cycle, and the opener lights win blink for 5 seconds,

when the invisible beam is broken. If fullyopen, the door will not close when the beam is broken. The

sensor has no effect in the opening cycle.

If the sensor is not installed or not aligned correctly, the door won'tclose from any remote control. You can close the door with the Door Control, the Outdoor Key Switch, or Keyless Entry, however, if you activate them until down travel is complete. If you release them too soon, the door will reverse.

The Opener Light will tum on under the following conditions: When the opener is initiallyplugged in; when the power is interrupted; when the opener is activated. It will turn oft automatically after 4-1/2

minutes or provide constant light when the Light feature is activated. Bulb size is 75 watts maximum.

Trolley _- .--

Release arm

Emergency

Release Handle

(Pull Down)

Manual disconnect

position

iN

Release Handle

(Pull Back

Towards Opener)

Emergency _..

To Reconnect

To open the door manually: The door should be fully closed if possible. Pull down on the emergency release handle (so that the trolley release arm snaps into a vertical position) and lift the door manually. The lockout feature prevents the trolley from recon-

necting automatically, and the door can be raised

and lowered manually as often as neccessary.

To re-engage the trolley:

Pull the emergency release handle toward the

opener at a 45" degree

angle so that the trolley release arm is horizontal.

The trolley will reconnect on the next UP or DOWN

operation, either manually or by pressing the Door

Control push button or the remote.

Operation of the Door Control (see page 18)

Press the lighted push button to open or close the door.

Press again to reverse the door during the closing cycle or to stopthe door while it's opening.

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Craftsman 139.53978SRT owner manual Operation of Your Opener, Operation of the Door Control see, Manual disconnect Position
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139.53978SRT specifications

The Craftsman 139.53978SRT is an advanced garage door opener that combines reliability, performance, and ease of use. Designed to cater to the needs of modern homeowners, this model stands out with its robust features and technological innovations.

One of the key highlights of the Craftsman 139.53978SRT is its powerful motor, delivering a peak horsepower equivalent to ensure smooth and efficient operation. This allows it to effortlessly lift even the heaviest of garage doors, making it suitable for various types of residential garage doors. The quiet operation of this opener is another major advantage, allowing for a peaceful environment in and around the garage.

Another notable feature is the smart technology integration. The Craftsman 139.53978SRT is compatible with a range of smart home systems, allowing users to control their garage door remotely via a smartphone app. This feature not only adds convenience but also enhances security, as users can receive alerts and notifications about the status of their garage door, ensuring peace of mind.

Security is a priority with this model, which comes equipped with rolling code technology. This mechanism generates a new code each time the remote is used, preventing unauthorized access and ensuring that your garage remains secure from intruders. Additionally, the enhanced safety features include safety sensors that detect obstacles, automatically reversing the door's movement if something is detected, thereby preventing accidents.

Installation and setup are straightforward, thanks to the user-friendly design of the Craftsman 139.53978SRT. The unit includes detailed instructions and all necessary hardware for installation. Many users can set it up within a few hours without the need for professional assistance.

With a durable construction, the Craftsman 139.53978SRT is built to last. It has a sleek design that complements various home aesthetics while withstanding wear and tear from daily use. Maintenance is minimal, with easy access to essential components for servicing.

In summary, the Craftsman 139.53978SRT offers a perfect blend of power, technology, and security features. Its user-friendly design, combined with smart technology compatibility and robust safety measures, makes it an ideal choice for homeowners seeking a reliable garage door opener. Whether you’re looking to upgrade an old system or install a new one, this model is sure to meet your requirements and enhance the functionality of your garage.
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