Chamberlain 3245M 1/3 HP Test the Safety Reversal System, Test The Protector System, Adjust

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ADJUSTMENT STEP 3

Test the Safety Reversal System

TEST

•With the door fully open, place a 1-1/2" (3.8 cm) board (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.

ADJUST

•If the door stops on 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.

NOTE: 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 21.

•Repeat the test.

•When the door reverses on the 1-1/2" (3.8 cm) board, remove the obstruction and run the opener through 3 or 4 complete travel cycles to test adjustment.

•If the unit continues to fail the Safety Reverse Test, call for a trained door systems technician.

IMPORTANT SAFETY CHECK:

Test the Safety Reverse System after:

•Each adjustment of door arm length, limits, or force 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.

ADJUSTMENT STEP 4

Test The Protector System®

•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 (2.5 cm), and the opener lights will flash.

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

If the opener closes the door when the safety reversing sensor is obstructed (and the sensors are no more than 6" (15 cm) above the floor), call for a trained door systems technician.

Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.

•Safety reversal system MUST be tested every month.

•If one control (force or travel limits) is adjusted, the other control may also need adjustment.

•After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3.8 cm) object (or 2x4 laid flat) on the floor.

1-1/2" (3.8 cm) board (or a 2x4 laid flat)

Without a properly installed safety reversing sensor, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.

Safety Reversing Sensor

Safety Reversing Sensor

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Contents For Residential Use Only Garage Door OpenerIntroduction Table of ContentsTools needed Preparing your garage doorSectional Door One-Piece DoorPlanning Sectional Door InstallationONE-PIECE Door Without Track ONE-PIECE Door with TrackCarton Inventory Installation HardwareAttach the Rail to the Motor Unit Assembly StepBolt previously removed from motor unit Tighten the Chain InstallationDetermine the Header Bracket Location Installation StepWall Header Bracket Installation Install the Header BracketCeiling Header Bracket Installation Attach the Rail to the Header Bracket Sectional Door or ONE-PIECE Door with Track Position the OpenerHang the Opener Standard installation only Run bell wire up wall Install the Door ControlAttach the Emergency Release Rope and Handle Install the LightElectrical Requirements Important Information about Safety Reversing Sensor Install The Protector SystemFacing the door from inside the garage Garage door track installation preferred Installing the BracketsWall installation Floor installation FigureTroubleshooting the Safety Reversing Mounting and Wiring the Safety Reversing SensorsAligning the Safety Reversing Sensors Fasten the Door Bracket Metal, insulated or light weight factory reinforced doorsSectional Doors Wood DoorsONE-PIECE Doors Sectional Doors only Connect Door Arm to Trolley ALL ONE-PIECE Doors Adjustment procedures, Figure Assemble the door arm, Figure Connect the door arm to the trolleyAdjust the UP and Down Travel Limits Adjustment StepIf door does not open at least 5 feet 1.5 m If the door does not close completelyHOW and When to Adjust the Forces Adjust the ForceTest the Down close force Test the UP open forceAdjust Test the Safety Reversal SystemImportant Safety Check Test The Protector SystemOperation Using Your Garage Door OpenerActivate your opener with any of the following Lock feature Light featureMULTI-FUNCTION Door Control Once a Month Care of Your OpenerTwice a Year Once a YearHaving a PROBLEM? Door control or wire shorted Safety reversing sensors wire open broken or disconnectedSymptom LED is not lit on door control Symptom Motor unit doesn’t operateUsing the Learn Button Using the Door Control To Add or Reprogram a Hand-held Remote ControlProgramming To Erase All Codes From Motor Unit MemoryTo change an existing, known PIN To Add, Reprogram or Change a Keyless Entry PINTo set a temporary PIN Rail Assembly Parts Repair PartsInstallation Parts Complete with Spring washer Motor Unit Assembly PartsComplete with Logic board Accessories Liftmaster Service is On Call
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