Craftsman 139.53978SRT Situation Probable Cause Solution, Door opens but, Doesnt turn off

Page 35

 

 

Having

a Problem? (continued)

 

Situation

Probable Cause

& Solution

 

The door opens but

1.

If the opener

lights blink, check the safety reversing sensor. See

page 23.

won't close:

2,

If the opener

lights do not blink and it is a new installation, check

the down force.

 

 

See Adjustment

Step 2, page 29. For an existing installation, see below.

Repeat the safety reverse test after the adjustment is complete•

The door reverses for no apparent reason and opener lights don't blink:

. Is something obstructing the door? Pull the red emergency release handle. Operate the door manually. If it is unbalanced or binding, call for professional garage door service.

2, Clear any ice or snow from the garage floor area where the door closes.

3.Review the force adjustment procedures on page 29.

4.If door reverses in the fully closedposition, decrease the travel limits (page 28).

Repeat safety reverse test after adjustments to force or travel limits. The need for occasional adjustment of the force and limit seffings is normal. Weather conditions in particular can affect doer travel.

The door reverses for no apparent reason

and opener lights blink for 5 seconds

after reversing:

Check the safety reversing sensor. Remove any obstruction or align the receiving eye. See page 23.

The opener light:

The opener strains or maximum force is

needed to operate door:

The opener motor

hums briefly, then won't work:

•..doesn't turn on:

Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener bulb if regular bulb burns out,

•.. doesn't turn off:

Is the Light feature on?. Turn it off.

The door may be out of balance or the springs are broken. Close the door and use the emergency release to disconnect the trolley. Open and close the door manually. A properly balanced door will stay in any point of travel while being supported entirely by itssphngs, If it

does not, disconnect the opener and call a professionalgarage door sewiceman. Do not increase the force to operate the opener.

1.The garage door springs are broken. See above.

2.If the problem occurs on the first operation of the opener, door may be locked. Disable the doorlock. If the chain was removed and reinstalled, the motor may be out of phase. Remove the chain; cycle the motor to the down position. Observe the drive sprocket. When it turns in a clockwise direction and stops in the down position, reinstall the chain.

Repeat the safety reverse test after the adjustment is complete,

The opener won't

1. Use the emergency release to disconnectthe trolley. The door can be opened and closed

operate due to

manually. When the power is restored, press the Door Control push bar or button and

power failure:

trolley will automatically reconnect (unless trolley is in lockout position.) See page 32.

2.The Emergency Key Release accessory (for use on garages with no service door) disconnects the trolley from outside the garage in case of power failure.

The chain droops

It is normal

for the chain to droop

slightly in the closed door position. Use the

or sags:

emergency

release to disconnect

the trolley. If the chain returns to normal height when

 

the trolley is disengaged and the door reverses on a one-inch board, no adjustments

 

are needed (see page 11).

 

35

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Contents Garage Door Opener Instructions. Read the instructions carefully Start by reviewing these important safety alert symbolsYoull Need Tools Closed Position SafetyBased on your particular requirements, there are Closed Position One-Piece Door with TrackOne-Piece Door without Track Section Carton Inventory@ @ Safety Reversing SensorAssembly Step Assembly Section Pages 8Hardware Shown Actual Size Install the Idler PulleyFasten the Rail to the Opener Master Link Clip-OnSpdng Unk Cap Install the Chain/Cable Attach the Sprocket Cover= Lo Tro,.y Tighten ChainProceed to , Installation Section Pages 12 Installation StepDetermine Header Bracket Location Example One-piece door without track Jamb hardwareCeiling Header Bracket Installation Install the Header BracketWall Header Bracket Installation Insert a ring fastener to secure Attach the Rail to the Header BracketWith the door fully open and parallel to the floor Position the OpenerHang the Opener Installation StepShown Actual Size UihJIlnJIlilililil Ililn Install the Door ControlSlide down to secure. Adjust screw for snug fit Serious injury or deathAttach the Emergency Release Rope and Handle Install the Light and the LensInstall the light Install the lensRightWrong Permanent Widng ConnectionsElectrical Requirements Important Information about Safety Reversing Sensor Safety Reversing SystemGarage door track installation preferred Sensor Safety ReversingInstalling the Brackets Be sure power to the opener is disconnectedTrouble Shooting the Safety Sensors Mounting and Wiring the Safety SensorsAligning the Safety Sensors Fasten Door Bracket IIIIIlllillllILllllllllllllllllNut IIIIIII11111111LLLIIIIIlIAbove holes Connect Door Arm to TrolleyRBok Adjustment Procedures for One-Piece Doors Adjustment Step If the door does not close completely Adjustment Section Pages 28 Adjustment StepHow and When to Adjust the Limits Adjust the UP and Down LimitsHow and When to Adjust the Forces Adjust the ForcePress the remote control push button to open the door Test The Safety Reversing SensorTest the Safety Reverse System Important safety checkSchedule MaintenanceTo reduce the risk of severe injury or death to persons Manual disconnect Position Operation of Your OpenerOperation of the Door Control see SECURITY,I Receiver and Remote Control ProgrammingIf you have a Premium Control Console If you do not have a Premium Control ConsoleSituation Probable Cause and Solution Having a Problem?Doesnt turn off Situation Probable Cause SolutionDoor opens but Opener lights blink for 5 secondsInstallation Parts Repair PartsRail Assembly Parts Br co.tact ASSEMe,v Opener Assembly PartsWith the door closed AccessoriesOnly through Sears Parts & Service For Sectional Doors OnlIndex Para ordenar piezas con entrega a domicilio For in-homemajor brand repair serviceSears Warranty

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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