Craftsman 139.53664SRT2 Test The Safety Reversing Sensor, Test the Safety Reverse System

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Adjustment	Step 3	I
Adjustment	Step 3
Test The Safety	Reversing Sensor

•Press the remote control push button to open the door.

•Place the opener carton in the path of the door.

•Press the remote control push button to close the door. The door will not move more than an inch, and the opener light(s) will flash.

Professional service is required if the opener

closes the door when the safety reversing sensor is obstructed.

The garage door opener will not close from a remote control if the indicator light in either sensor is off(alerting you to the fact that the sensor is misaligned or obstructed).

The garage door can be closed by pressing and holding the Door Control push button until down

travel is completed.Safety Reversing SensorSafety Reversin_J Sensor

Adjustment Step 4	I
Adjustment Step 4
Test the Safety Reverse System

Test:

•Place a one-inchboard (or a 2x4 laid flat) on the floor, centered under the garage door.

•Operate the door in the down direction. The door must reverse on striking the obstruction.

Adjustment:

If the door stopson the obstruction, it is not traveling far enough in the down direction.

•Increase the DOWN limit by turning the DOWN limit adjustment screw counterclockwise 1/4 turn.

•Repeat the test.

On a sectional door, make sure limit

adjustments do not force the door arm beyond a straight up and down position. See the illustration on page 26.

•When the door reverses on the one-inch board, remove the obstruction and run the opener through 3 or 4 complete travel cycles to test adjustment.

If the door will not reverse after repeated adjustment attempts, call for professional garage door service.

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Important safety check

Repeat Adjustment Steps 1, 2 and 4 after:

•Each adjustment of door arm length, force controls or limit controls.

•Any repair to or adjustment of the garage door (including springs and hardware).

•Any repair to or buckling of the garage floor.

•Any repair to or adjustment of the opener.

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Contents CRRFTSMIiN Start by Reviewing these Important Safety Alert Symbols MechanicalElectricaLYoull Need Tools It must close on the floor all the way across Otherwise, the safety reverse system may notClosed Position Work properly. See page 30. Floor or door shouldOne-P ece Door without Track One-Piece Door with TrackHardw&faSlsenlguired Carton Inventory Installation Hardware Safety Reversing Sensor Installation HardwareAssemble the T-rail Attach the Belt Pulley Bracket Assembly Section Pages 8Assembly Step Hardware Shown Actual SizeInstall the Trolley on the T-rail Fasten the T-rail to the OpenerInstall the Belt Set Belt Tension PlaceCheck to make sure the belt is not twisted Attach the Belt Cap Retainer To attach the belt cap retainerPages 12 Installation Section Installation Step#youneed to install the header bracket Proceed to ,One-piece door without track Jamb hardware ExampleFasten the Header Bracket to the Ceiling Install the Header BracketFasten the Header Bracket to the Wall DoorHardware Shown Actual SizeAttach the T-rail Header Bracket Shown Actual SizePosition the Opener Hang the Opener Opener could fall and injure someone if itIs not properly secured. Fasten the opener Install the Premium Control Console 32 explains how to use the door control Install the Lights LensesInstall the lenses Install the lightsIf permanent wiring is required by your local Code, refer to the following procedureElectrical Requirements Safety Reversing System Facing the door from inside the garageFinger tighten the lock nuts Install the Safety Reversing SensorSensors will face each other across the garage door Alternate Floor MountAligning the Safety Sensors Trouble ShootingFasten Door Bracket Bracket Hodzontal and vertical reinforcementScrewsnot provided Connect Door Arm to Trolley Hole Alignment Alternative Adjustment Procedures for One-Piece Doors Fasten the straight and curved door arm sections Together to the longest possible length, with a 2 or How and When to Adjust the Limits Adjustment Section Pages 28Adjust the UP and Down Limits If the door does not close completelyHow and When to Adjust the Forces Adjustment StepAdjust the Force Test the Down close forceImportant safety check Test The Safety Reversing SensorTest the Safety Reverse System AdjustmentInjury or death to persons MaintenanceTo reduce the risk of severe Care of Your OpenerOperation of Your Opener Operation of the Door ControlsReceiver and Remote Control Programming If you have a Premium Control ConsoleIf you do not have a Premium Control Console Having a Problem? Probable Cause and SolutionSituation Probable Cause & Solution Repair Parts Rail Assembly PartsInstallation Parts Repair Parts Opener Assembly PartsAccessories For Sectional Doors On12If you do not have Premium Control Console Index 8OO-366-PART Product Type Part Number Model Description