1280-298LMC - Garage door opener LiftMaster - Free user manual and instructions

Product Type	Garage Door Opener
Brand	LiftMaster
Model	1280-298LMC
Power Supply	120V, 60 Hz
Motor Type	DC motor with belt drive
Rail Length	7 ft (standard), optional 8 ft and 10 ft rails available
Light Bulb Max	75 watts (standard neck)
Safety Features	Protector System® reversing sensors, auto reverse, force and limit adjustments
Remote Control	SECURITY+ 3-channel remote (included, operates up to 8 functions)
Door Control Panel	Motion detecting, with Light, Lock, and push bar
Battery Backup	Not included (opener has no built-in battery backup)
Manual Release	Red handle rope, 6 ft above floor
Warranty	5-year limited on parts, lifetime on motor and belt
Weight	Approximately 35 lbs (estimated)
Compatible Door Types	Sectional and one-piece doors with or without track
Recommended Maintenance	Monthly safety reverse test, annual lubrication of rollers and hinges (not tracks)
Repair Parts	Available via Chamberlain Group; rail, gear, logic board, etc.
Installation Tools	Level, tape measure, drill, various wrenches, stepladder

Frequently Asked Questions - 1280-298LMC LiftMaster

How do I program a new remote control to my LiftMaster 1280-298LMC?

Press and hold the button on the new remote. Then press and release the 'Smart' (learn) button on the right side of the opener. The opener lights will flash once. Release the remote button. Test by pressing the remote button to operate the door.

What should I do if the door reverses for no apparent reason and the lights don't blink?

First, manually operate the door to check for binding or imbalance. If the door is balanced, adjust the DOWN (close) force by turning the force adjustment control clockwise in 10-degree increments. Also check for ice or snow under the door. After adjustments, retest the safety reverse system.

How do I adjust the travel limits?

Located on the left side panel of the opener. Use a screwdriver: UP limit screw controls how far the door opens; turn clockwise to increase travel. DOWN limit screw controls how far it closes; turn counterclockwise to increase travel. One full turn equals 2 inches of travel.

Why won't my garage door close with the remote control?

The most common cause is the safety reversing sensors are misaligned or obstructed. Check that both sensor indicator lights are glowing steadily (orange on sending, green on receiving). If green is off or flickering, realign the sensors. Also ensure the sensor beam path is clear.

How do I test the safety reverse system?

Place a 2x4 board flat on the floor under the door. Operate the door to close. It must reverse when it contacts the obstruction. If not, adjust the DOWN limit or force settings. Repeat the test monthly.

Can I use an extension cord with this garage door opener?

No. The owner's manual explicitly warns against using an extension cord, 2-wire adapter, or modifying the plug. Plug the opener directly into a properly grounded outlet.

How do I disable the automatic light feature?

Slide the Detector Switch on the right side of the door control panel to the OFF position. This disables the motion sensor that turns on the light automatically when a person enters the garage.

What should I do if the opener motor hums but the door doesn't move?

First, check if the garage door springs are broken (the door may be very heavy). If the problem occurred after belt reinstallation, the motor may be out of phase. Remove the belt, cycle the motor to down position, then reinstall the belt. Also ensure the door lock is disabled.

How do I replace the remote control battery?

Pry open the remote case using the visor clip or a screwdriver. The battery is a 3V2032 lithium battery. Insert the new battery positive side up. Dispose of the old battery properly. The battery typically lasts up to 5 years.

Is the 1280-298LMC compatible with a 8-foot garage door?

Yes, but you need to purchase the optional 8-foot Complete Rail (Model 1778LMC) to allow the door to open fully. The standard rail is designed for 7-foot doors.

USER MANUAL 1280-298LMC LiftMaster

For Residential Use Only

Technical line drawing of a mechanical assembly with two metal rods and a central circular component (no text or symbols)

Owner's Manual

■ Please read this manual and the enclosed safety materials carefully!
■ Fasten the manual near the garage door after installation.
- The door WILL NOT CLOSE unless the Protector System® is connected and properly aligned.
■ Periodic checks of the opener are required to ensure safe operation.
■ The model number label is located under the light lens on the left side of your opener.

CONTENTS PAGE

A review of safety alert symbols ......2

You'll need tools....3

Safety information regarding garage door locks and ropes....3

Testing your garage door for sticking, binding and balance ....3

Illustration of sectional door installation ....4

Illustration of one-piece door installation....4

Carton inventory......5

Hardware inventory....5

Assembly Section - Pages 6 – 7

Attach T-rail to opener 6

Set the belt tension 6

Attach belt cap retainer....7

Installation safety instructions....7

Installation Section - Pages 8 – 23

Determine header bracket location Sectional door....8

One-piece door 9

Install header bracket....10

Attach the T-rail to header bracket....11

Position the opener....12

Hang the opener 13

Install the door control....14

Install the lights and lenses....15

Attach manual release rope and handle .....15

CONTENTS PAGE

Electrical requirements ....16

The Protector System ^® safety reversing sensor information ....17

Install the safety reversing sensor ....18, 19

Fasten door bracket (sectional door) .....20

Fasten door bracket (one-piece door)....21

Connect door arm to trolley (sectional door).....22

Connect door arm to trolley (one-piece door) .....23

Adjustment Section - Pages 24 – 26

Travel limit adjustments ....24

Force adjustments ....25

Test the Protector System ^® .....26

Test the safety reverse system....26

Operation safety instructions ....27

Care of your opener....27

Maintenance schedule....27

Operation of your opener....28

Receiver & remote control programming .....29

Having a problem?......30, 31

Repair parts, rail assembly 32

Repair parts, installation ....32

Repair parts, opener assembly....33

Accessories....34

Index 35

How to order repair parts 36

Warranty 36

Start by reviewing these important safety alert symbols

When you see these Safety Symbols on the following pages, they will alert you to the possibility of serious injuries or death if you do not comply with the corresponding instructions. The hazard may come from something mechanical or from electric shock. Read the instructions carefully.

WARNING

Mechanical Electrical

WARNING

When you see this Safety Symbol on the following pages, it will alert you to the possibility of damage to your garage door and/or the garage door opener if you do not comply with the corresponding instructions. Read the instructions carefully.

CAUTION

This garage door opener is designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the safety instructions contained in this manual.

You'll Need Tools

During assembly, installation and adjustment of the opener, instructions will call for hand tools shown below.

WARNING

An unbalanced garage door might not reverse when required and someone under the door could be seriously injured or killed.

If your garage door binds, sticks or is out of balance, call for professional garage door service. Garage doors, door springs, cables, pulleys, brackets and their hardware are under extreme tension and can cause serious injury or death. Do not try to loosen, move or adjust them yourself!

Ropes left on a garage door could cause someone to become entangled and killed. Remove all ropes connected to the door before installing and operating the opener.

Identify the type and height of your door and any special conditions that exist and any additional materials that may be required by referring to page 4.

CAUTION

To avoid damage to the garage door and opener, disable locks before installing and operating the opener. Use a wood screw or nail to hold locks in the "open" (unlocked) position. Operation at other than 120V 60 Hz will cause opener malfunction and damage.

Before you begin, complete the following test to make sure your door is balanced, and is not sticking or binding:

• Lift the door about halfway as shown. Release the door. It should stay in place, supported entirely by its springs.
• Raise and lower the door to see if there is any binding or sticking.

Line drawing of a person standing beside a window with square windows, labeled 'SECTIONAL DOOR' at the bottom (no other text or symbols)

Illustration of a person opening a large window labeled 'ONE-PIECE DOOR' (no other text or symbols)

Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. You may find it helpful to refer back to this page as you proceed with the installation of your opener.

Carton Inventory

Your garage door opener is packaged in two cartons which contain all parts illustrated below. If anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. Hardware for installation is also listed below.

INSTALLATION HARDWARE

Hex Screw 5/16"-18x7/8" (4)

Hex Screw #8x3/8" (2)

Lag Screw 5/16"-9x1-5/8" (2)

Lag Screw 5/16"-18x1-7/8" (2)

Carriage Bolt 5/16"-18x2-1/2" (2)

Clevis Pin 5/16"x2-3/4" (1)

Clevis Pin 5/16"x1-1/4" (1)

Clevis Pin 5/16"x1" (1)

Nut 5/16"-18 (6)

Lock Washer 5/16" (6)

Screw 6ABx1-1/4" (2)

Screw 6-32x1" (2)

Insulated Staples (10)

Ring Fastener (3)

Dry Wall Anchors (2)

Rope

Handle

Rail Grease

SAFETY REVERSING SENSOR INSTALLATION HARDWARE

Carriage Bolt 1/4"-20x1/2" (2)

Wing Nut (2)

Insulated Staples (20)

Assembly Section: Pages 6 - 7

ASSEMBLY STEP 1

Attach the T-Rail To the Opener

• Remove the two washed screws mounted in top of opener.
• Align T-rail and styrofoam over opener sprocket.
• Cut tape from T-rail, belt and styrofoam.
• REMOVE STYROFOAM.

- Insert both washed screws through the T-rail into the opener. Tighten both screws securely. USE ONLY THESE SCREWS! Any other screws will cause serious damage to the opener.

Position belt over the opener sprocket.

CAUTION

To fasten rail, use only those screws mounted in the top of the opener. Any other screws will cause serious damage to the opener.

ASSEMBLY STEP 2

Set the Belt Tension

Figure A

• By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the trolley (Figure A). Do not use any tools.
• Insert a screwdriver tip into one of the nut ring slots and brace it firmly against the trolley (Figure B).

Figure B

• Place a 7/16" open end wrench on the square end. Rotate about 1/4 turn until the spring releases and snaps the nut ring against the trolley (Figure C).
  This extends the spring for optimum belt tension.

Figure C

Assembly Step 3

Attach the Belt Cap Retainer

- Position the belt cap retainer over the opener sprocket so the two holes in cap align with the two holes in mounting plate. Attach with #8x3/8" hex screws provided.

Hardware Shown Actual Size

WARNING

Serious injury can result if fingers become entangled in moving opener sprocket. Attach belt cap retainer securely. Never operate opener while your hand is near the opener sprocket.

You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section:

IMPORTANT INSTALLATION INSTRUCTIONS

WARNING

WARNING

To reduce the risk of severe injury or death to persons:

1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.
2. Install only on a properly balanced and lubricated garage door. An improperly balanced door may not reverse and could result in severe injury or death. Repairs to cables, spring assemblies and other hardware must be made by a professional service person before installing opener.
3. Disable all locks and remove all ropes connected to the garage door before installing the opener. Ropes connected to a garage door can cause entanglement and death.
4. If possible, install door opener 7 feet or more above floor with the manual release handle mounted 6 feet above the floor.
5. Do not connect the opener to power source until instructed to do so.
6. Locate the Door Control within sight of the door at a minimum height of 5 feet where small children cannot reach and away from all moving parts of the door.
7. Install the User Safety Instruction Label on the wall adjacent to the control button and the Maintenance Instruction Label in a prominent location on the inside of the garage door.
8. Upon completion of the installation, the door must reverse when it comes in contact with a one-inch high object or a 2x4 laid flat on the floor.
9. Do not wear watches, rings or loose clothing while installing or servicing an opener. Jewelry or loose clothing can be caught in the mechanism of the garage door or the opener.

Installation Step 1

Determine Header Bracket Location

Installation procedures vary according to garage door types. Follow the instructions which apply to your door.

SECTIONAL Doors and ONE-PIECE Door With Track

WARNING

If the header bracket is not rigidly fastened to a structural support on the header wall or ceiling, the safety reverse system may not work properly (see page 26). The door might not reverse when required, and could cause serious injury or death.

The garage door springs, cables, pulleys, brackets and their hardware are under extreme tension. Do not attempt to loosen, move or adjust them yourself. Serious personal injury or death could result. Call for professional garage door service.

• Close the door and mark the inside vertical centerline of the garage door.
• Extend the line onto the header wall above the door.

Remember, you can fasten the header bracket within 4 feet to the left or right of the door center only if a torsion spring or center bearing plate is in the way; or you can attach it to the ceiling (refer to page 10) when clearance is minimal. (It may be mounted on the wall upside down if necessary, to gain approximately 1/2".)

If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not supplied) to securely fasten the 2x4 to structural supports.

- Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header wall 2" above the high point. This height will provide travel clearance for the top edge of the door.

Sectional door with curved track

One-piece door with horizontal track

Proceed to Step 2, page 10.

ONE-PIECE Door Without Track

Read the Safety Instructions on page 8. They also apply to doors without tracks.

- Close the door and mark the inside vertical centerline of your garage door. Extend the line onto the header wall above door.

If headroom clearance is minimal, you can install the header bracket on the ceiling. See page 10.

- If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not supplied) to securely fasten the 2x4 to structural supports as shown.

One-piece door without track jamb hardware

One-piece door without track pivot hardware

• Open your door to the highest point of travel as shown. Measure the distance from the top of the door to the floor. Subtract the actual height of the door. Add 8" to the remainder. (See Example).
• Close the door and draw an intersecting horizontal line on the header wall at the determined height.

If the total number of inches exceeds the height available in your garage, use the maximum height possible, or refer to page 10 for ceiling installation.

EXAMPLE

Distance from top of door

(at highest point of travel) to floor....92"

Actual height of door ....-88"

Remainder....4"

Add....+8"

Bracket height on header wall.....=12"

(Measure UP from top of CLOSED door.)

Proceed to Step 2, page 10.

Installation Step 2 Install the Header Bracket

You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions which will work best for your particular requirements.

Fasten the Header Bracket to the Wall

- Center the bracket on the vertical guideline with the bottom edge of the bracket on the horizontal line as shown (with the arrow pointing toward the ceiling).

- Mark either set of bracket holes (do not use the holes designated for ceiling mount). Drill 3/16" pilot holes and fasten the bracket securely to a structural support with the hardware provided.

Fasten the Header Bracket to the Ceiling

• Extend the vertical guideline onto the ceiling as shown.
• Center the bracket on the vertical mark, no more than 6" from the wall. Make sure the arrow is pointing toward the wall. The bracket can be mounted flush against the ceiling when clearance is minimal.
• Mark holes designated for ceiling mount only. Drill 3/16" pilot holes and fasten bracket securely to a structural support with the hardware provided.

Installation Step 3

Attach the T-rail to the Header Bracket

Installation Step 4

Position the Opener

Follow instructions which apply to your door type as illustrated.

CAUTION

To prevent damage to steel, aluminum, fiberglass or glass panel doors, do not rest the opener on the door without using a 2x4.

SECTIONAL Door & ONE-PIECE Door with Track

A 2x4 laid flat is convenient for setting an ideal door-to-T-rail distance.

• Raise the opener onto a stepladder.
  You will need help at this point if the ladder is not tall enough.
• Open the door all the way and place a 2x4 laid flat on the top section beneath the T-rail.
• If the top panel hits the trolley when you raise the door, pull down on the trolley release arm to disconnect inner and outer sections. The trolley can remain disconnected until Step 12 is completed.

ONE-PIECE Door without Track

• With the door fully open and parallel to the floor, measure the distance from the floor to the top of the door.
• Using a stepladder as a support, raise the opener to the same distance as the door from the floor (it will be at a slight angle as shown).
• The top of the door should be level with the top of the opener. Do not position the opener more than 2" above this point.

Installation Step 5

Hang the Opener

Two representative installations are shown.

Yours may be different. Hanging brackets should be angled, Figure 1, to provide rigid support. On finished ceilings, Figure 2, attach a sturdy metal bracket to structural supports before installing the opener. The bracket and fastening hardware are not supplied.

• Measure the distance from each side of the opener to the structural support.
- Cut both pieces of the hanging bracket to required lengths.
- Drill 3/16" pilot holes in the structural supports.
- Attach one end of each bracket to a support with 5/16"-18x1-7/8" lag screws.
- Fasten the opener to the hanging brackets with 5/16"-18x7/8" hex screws, lock washers and nuts.
- Check to make sure the T-rail is centered over the door (or in line with the header bracket if the bracket is not centered above the door).
- Remove the 2x4. Operate the door manually. If the door hits the rail, raise the header bracket.

Grease the top and underside of the rail surface where the trolley slides with rail grease.

Hardware Shown Actual Size

Line drawing of a Long Screw with evenly spaced grooves (no text or symbols)

Lag Screw 5/16"-18x1-7/8"

Hex Screw 5/16"-18x7/8"

Nut 5/16"-18

Lock Washer 5/16"

WARNING

The opener could fall and injure someone if it is not properly secured. Fasten the opener securely to structural supports of the garage.

Figure 1

Figure 2
— FINISHED CEILING —

Installation Step 6

Install the Door Control Panel

Locate the door control within sight of the door at a minimum height of 5 feet where small children cannot reach, and away from all moving parts of the door and door hardware.

The door control is typically attached directly to the wall. If installing into drywall, drill 5/32" holes and use the anchors provided. For pre-wired installations (as in new home construction) it can be mounted to a standard single gang box. See illustrations.

1. Strip 1/4" of insulation from one end of the bell wire. Connect the wire to the two screw terminals on back of door control: white wire to 2 and white/red wire to 1.
2. Remove the push bar cover by gently prying off the top edge with a coin or screwdriver. Fasten with 6ABx1-1/4" self-tapping screws (standard installation) or 6-32x1" machine screws (pre-wired installation) as follows:
3. Install bottom screw, allowing 1/8" to protrude from the wall.
4. Position bottom of door control on screw head and adjust for snug fit.

5. Install top screw with care to avoid cracking plastic housing. Do not overtighten.

6. (For standard wall mount only) Run the bell wire up wall and across ceiling to opener. Use insulated staples to secure the wire in several places. Be careful not to pierce the wire with a staple, creating a short.

7. Connect the bell wire to the terminal screws on the opener panel: white to 2 and white/red to 1.

8. After testing, replace the cover by inserting top tabs and snapping into place.

NOTE: After installation, the green indicator light behind the push bar cover will indicate proper connection.

The automatic light feature will become functional 1-1/2 minutes after power is restored.

1. Attach the User Safety Instruction label to the wall near the door control, and the Maintenance Instruction label in a prominent location on the inside of the garage door.

Page 28 explains how to use the door control.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

WARNING

DO NOT CONNECT TO LIVE ELECTRICAL WIRING. CONNECT ONLY TO 24 VOLT LOW VOLTAGE WIRES. CONNECTION TO LIVE WIRES OR HIGHER VOLTAGE MAY CAUSE SERIOUS INJURY FROM SHOCK, BURN OR ELECTROCUTION.

Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Do not allow children to operate the push button(s) or the remote control transmitter(s).

A moving garage door could injure someone under it. Activate the opener only when the door is properly adjusted, you can see it clearly, and there are no obstructions to door travel.

Do NOT connect the power and operate the opener at this time. The trolley will travel to the full open position but will not return to the close position until the sensor beam is connected and properly aligned. See Safety Reversing Sensor Instructions beginning on page 17.

Outside Keylock Accessory Connections
To opener terminal screws: white to 2; white/red to 1

Hardware Shown Actual Size

Installation Step 7 Install the Lights and the Lenses

• Install a 75 watt maximum light bulb in the socket. The light will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the light will turn OFF.
• If the bulbs burn out prematurely due to vibration, replace with a "Garage Door Opener" bulb.
• Slide lenses into guides. Snap bottom tabs into lens slots.
• For convenience, the lenses may be installed after Adjustment Step 4 on page 26.
• Reverse the procedure to remove the lenses.

Installation Step 8 Attach the Manual Release Rope and Handle

WARNING

Do not use the red handle to pull the door open or closed. The rope knot could become untied and you could fall. Use the manual release only to disengage the trolley and, if possible, only when the door is closed.

Garage doors are heavy. If the door is open when the handle is pulled, the door could close inadvertently if it is not properly balanced. Serious injury may result to persons under the door. Make sure the doorway is clear of persons and obstructions before pulling handle when door is open.

• Thread one end of the rope through the hole in the top of the red handle so "NOTICE" reads right side up as shown. Secure with an overhand knot at least 1" from the end of the rope to prevent slipping.
• Thread the other end of the rope through the hole in the release arm of the outer trolley.
• Adjust rope length so the handle is 6 feet above the floor. Secure with an overhand knot.

If it is necessary to cut the rope, heat seal the cut end with a match or lighter to prevent unraveling.

Installation Step 9

Electrical Requirements

To reduce the risk of electric shock, your garage door opener has a grounding type plug with a third grounding pin. This plug will only fit into a grounding type outlet.

If the plug doesn't fit into the outlet you have, contact a qualified electrician to install the proper outlet.

To avoid installation difficulties, do not run the opener at this time.

WARNING

To prevent electrocution or fire, installation and wiring must be in compliance with local electrical and building codes.

Do NOT use an extension cord, 2-wire adapter, or change the plug in any way to make it fit your outlet.

Simple line drawing of a plug inserted into an electrical outlet (no text or symbols)

Right

Wrong

If permanent wiring is required by your local code, refer to the following procedure:

WARNING

To prevent electrocution, remove power from the garage door opener and from the circuit you plan to use for the permanent connection.

• To make a permanent connection through the 7/8" diameter hole in the top of the opener (according to local code):
• Remove the opener cover screws and set the cover aside.
• Remove the attached 3-prong cord.
• Connect the black (line) wire to the screw on the brass terminal; the white (neutral) wire to the screw on the silver terminal; and the ground wire to the green ground screw. The opener must be grounded.
• Reinstall the cover.

To avoid installation difficulties, do not run the opener at this time.

The Protector® System

IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR

The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. This is a required safety device and cannot be disabled.

When properly connected and aligned, the safety reversing sensor will detect an obstacle in the path of its electronic beam. The sending eye (with an orange indicator light) transmits an invisible light beam to the receiving eye (with a green indicator light). If an obstruction breaks the light beam while the door is closing, the door will stop and reverse to full open position, and the door control will flash for 5 seconds.

The units must be installed inside the garage so that the sending and receiving eyes face each other across the door, between 4 – 6" above the floor.

Either can be installed on the left or right of the door as long as the sun never shines directly into the receiving eye lens.

The mounting brackets are designed to clip onto the track of sectional garage doors without additional hardware.

WARNING

Without a properly working safety reversing sensor, persons (particularly children) could be injured or killed by a closing garage door. Read and follow all instructions.

To protect small children, install the safety reversing sensor so that the beam will be no higher than 4"-6" above the garage floor.

Disconnect power to the garage door opener before installing the safety reversing sensor.

If it is necessary to mount the units on the wall, the brackets must be securely fastened to a solid surface such as the wall framing. Extension brackets (see accessories) are available if needed. If installing in masonry construction, add a piece of wood at each location to avoid drilling extra holes in masonry if repositioning is necessary.

The invisible light beam path must be unobstructed. No part of the garage door (or door tracks, springs, hinges, rollers or other hardware) may interrupt the beam while the door is closing.

Figure 1: Facing the door from inside the garage

Installation Step 10 Install the Safety Reversing Sensor

INSTALLING THE BRACKETS

Be sure power to the opener is disconnected.

Install and align the brackets so the sensors will face each other across the garage door, with the beam from 4 – 6" above the floor.

They may be installed in one of three ways, as follows.

Garage door track installation (preferred):

- Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Snap into place against the side of the track. It should lie flush, with the lip hugging the back edge of the track, as shown in Figure 2.

If your door track will not support the bracket securely, wall installation is recommended.

Wall installation:

• Place the bracket against the wall with curved arms facing the door. Be sure there is enough clearance for the sensor beam to be unobstructed.
• If additional depth is needed, an extension bracket (see Accessories) or wood blocks can be used.
• Use bracket mounting holes as a template to locate and drill (2) 3/16" diameter pilot holes on the wall at each side of the door, from 4–6" above the floor.
• Attach brackets to wall with lag screws (not provided).
• If using extension brackets or wood blocks, adjust right and left assemblies to the same distance out from the mounting surface. Make sure all door hardware obstructions are cleared.

Floor installation:

• Use wood blocks or extension brackets (see Accessories) to elevate sensor brackets so the lenses will be 4-6" above the floor.
• Carefully measure and place right and left assemblies at the same distance out from the wall. Be sure all door hardware obstructions are cleared.
• Fasten to the floor with concrete anchors as shown.

Hardware Shown Actual Size

Figure 2 DOOR TRACK MOUNT (Right Side)

Figure 3 WALL MOUNT (Right Side)

Figure 4 FLOOR MOUNT (Right Side)

MOUNTING AND WIRING THE SAFETY SENSORS

• Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor. Use wing nuts to fasten sensors to brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket extension. See Figure 5.
• Finger tighten the wing nuts.
• Run the wires from both sensors to the opener. Use insulated staples to secure wire to wall and ceiling.
• Strip 1/4" of insulation from each set of wires. Separate white and white/black wires sufficiently to connect to the opener terminal screws: white to 2 and white/black to 3.

ALIGNING THE SAFETY SENSORS

- Plug in the opener. The indicator lights in both the sending and receiving eyes will glow steadily if wiring connections and alignment are correct.

The sending eye orange indicator light will glow regardless of alignment or obstruction. If the green indicator light in the receiving eye is off, dim, or flickering (and the invisible light beam path is not obstructed), alignment is required.

• Loosen the sending eye wing nut and readjust, aiming directly at the receiving eye. Lock in place.
• Loosen the receiving eye wing nut and adjust sensor until it receives the sender's beam. When the green indicator light glows steadily, tighten the wing nut.

Figure 5

TROUBLESHOOTING THE SAFETY SENSORS

1. If the sending eye indicator light does not glow steadily after installation, check for:

2. Electric power to the opener.

3. A short in the white or white/black wires. These can occur at staples, or at screw terminal connections.
4. Incorrect wiring between sensors and opener.

5. A broken wire.

6. If the sending eye indicator light glows steadily but the receiving eye indicator light doesn't:

7. Check alignment.

8. Check for an open wire to the receiving eye.

9. If the receiving eye indicator light is dim, realign either sensor.

NOTE: When the invisible beam path is obstructed or misaligned while the door is closing, the door will reverse. If the door is already open, it will not close. The door control will blink 10 times. See page 17.

Figure 6 Wiring the Safety Sensors

Installation Step 11

Fasten Door Bracket

Follow instructions which apply to your door type as illustrated below or on page 21.

WARNING

To prevent damage to steel, aluminum, fiberglass or glass panel doors, always reinforce the inside of the door both vertically and horizontally with angle iron.

A horizontal brace should be long enough to be secured to 2 vertical supports. A vertical brace should cover the height of the top panel.

The illustration shows one piece of angle iron as the horizontal brace. For the vertical brace, 2 pieces of angle iron are used to create a "U"-shaped support. The best solution is to check with your garage door manufacturer for an opener installation door reinforcement kit.

SECTIONAL Door Installation Procedure

• Center the door bracket on the previously marked vertical guideline used for the header bracket installation. Note the correct UP placement as stamped inside the bracket.
• Position the bracket on the face of the door within the following limits:

A) The top edge of the bracket 2"-4" below the top edge of the door.
B) The top edge of the bracket directly below any structural support across the top of the door.
- Mark and drill 5/16" left and right fastening holes. Secure the bracket as shown in Figure 1 if there is vertical reinforcement.

If your installation doesn't require vertical reinforcement but does need top and bottom fastening holes for the door bracket, fasten as shown in Figure 2.

Hardware Shown Actual Size

All ONE-PIECE Door Installation Procedure

Please read and comply with the warnings and reinforcement instructions on page 20. They apply to one-piece doors also.

• Center the bracket on the inside face of the door, in line with the header bracket as shown. Mark either the left and right, or the top and bottom holes.
• Drill 5/16" pilot holes and fasten the door bracket with hardware supplied.

Hardware Shown Actual Size

Carriage Bolt 5/16"-18x2-1/2"

Installation Step 12

Connect Door Arm to Trolley

Follow instructions which apply to your door type as illustrated below and on page 23.

SECTIONAL Doors Only

Make sure garage door is fully closed. Pull the manual release handle to disconnect the outer trolley from the inner trolley. Slide the outer trolley back (away from the door) about 2" as shown in Figures 1, 2 and 3.

Figure 1:

• Fasten straight door arm section to outer trolley with the 5/16"x1" clevis pin. Secure the connection with a ring fastener.
• Fasten curved section to the door bracket in the same way, using the 5/16"x1-1/4" clevis pin.

Figure 2:

- Bring arm sections together. Find two pairs of holes that line up and join sections. Select holes as far apart as possible to increase door arm rigidity.

Figure 1 Figure 2

Hole Alignment Alternative

Figure 3:

• If holes in curved arm are above holes in straight arm, disconnect straight arm. Cut about 6" from the solid end. Reconnect to trolley with cut end down as shown.
• Bring arm sections together.
  • Find two pairs of holes that line up and join with screws, lock washers and nuts.

Figure 3

Proceed to Adjustment Step 1, page 24. Trolley will re-engage automatically when the opener is operated.

All ONE-PIECE Doors

Assemble the Door Arm:

• Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap).
• With the door closed, connect the straight door arm section to the door bracket with the 5/16"x1-1/4" clevis pin.
• Secure with a ring fastener.

On one-piece doors, before connecting the door arm to the trolley the travel limits must be adjusted. Limit adjustment screws are located on the left side panel as shown on page 24. Follow adjustment procedures below.

Adjustment Procedures for One-Piece Doors

Open Door Adjustment: Decrease UP limit

• Turn the UP limit adjustment screw counterclockwise 5-1/2 turns.
• Press the Door Control push bar. The trolley will travel to the fully open position.
• Manually raise the door to the open position (parallel to the floor), and lift the door arm to the trolley. The arm should touch the trolley just in back of the door arm connector hole. Refer to the fully open trolley/door arm positions in the illustration. If the arm does not extend far enough, adjust the limit further. One full turn equals 2" of trolley travel.

Closed Door Adjustment: Decrease DOWN limit

• Turn the DOWN limit adjustment screw clockwise 5 complete turns.
• Press the Door Control push bar. The trolley will travel to the fully closed position.
• Manually close the door and lift the door arm to the trolley. The arm should touch the trolley just ahead of the door arm connector hole. Refer to the fully closed trolley/door arm positions in the illustration. If the arm is behind the connector hole, adjust the limit further. One full turn equals 2" of trolley travel.

Connect the door arm to the trolley.

• Close the door and join the curved arm to the connector hole in the trolley with the remaining clevis pin. It may be necessary to lift the door slightly to make the connection.
• Secure with a ring fastener.
• Run the opener through a complete travel cycle. If the door has a slight "backward" slant in full open position as shown in the illustration, decrease the UP limit until the door is parallel to the floor.

Adjustment Step 1

Adjust the UP and DOWN Limits

Do not make any limit adjustments until the safety reversing sensors are completely installed.

Limit adjustment settings regulate the points at which the door will stop when moving up or down.

The door will stop in the up direction if anything interferes with door travel. The door will reverse in the down direction if anything interferes with the door travel (including binding or unbalanced doors).

To operate the opener, press the Door Control push bar. Run the opener through a complete travel cycle.

• Does the door open and close completely?
• Does the door stay closed and not reverse unintentionally when fully closed?

If your door passes both of these tests, no limit adjustments are necessary unless the reversing test fails (See page 26).

Adjustment procedures are outlined below. Run the opener through a complete travel cycle after each adjustment.

Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off. Simply wait 15 minutes and try again.

Read the procedures carefully before continuing on to Adjustment Step 2. Use a screwdriver to make limit adjustments.

WARNING

Improper adjustment of the travel limits will interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or kill someone under it. Test the safety reverse system following all adjustments to the travel limits. See page 26.

Adjustment Label

How and When to Adjust the Limits

- If the door does not open completely, but opens at least five feet:

Increase up travel. Turn the UP limit adjustment screw clockwise. One turn equals 2" of travel.

NOTE: To prevent the trolley from hitting the cover protection bolt, keep a minimum distance of 2-4" between the trolley and the bolt.

- If door does not open at least 5 feet:

Adjust the UP (open) force as explained in Adjustment Step 2.

- If the door does not close completely:

Increase down travel. Turn the DOWN limit adjustment screw counterclockwise. One turn equals 2" of travel.

If the door still won't close completely and the trolley bumps into the pulley bracket (see page 4), try lengthening the door arm (see page 22).

If you have adjusted the door arm to the maximum length and the door still will not close completely, lower the header bracket. See Installation Step 1, pages 8 and 9.

• If the opener reverses in fully closed position:
  Decrease down travel. Turn the DOWN limit adjustment screw clockwise. One turn equals 2" of travel.
• If the door reverses when closing and there is no visible interference to travel cycle:

If the opener lights are flashing, the Safety Reversing Sensors are either not installed, misaligned, or obstructed. See Troubleshooting, page 19.

Test the door for binding: Pull the manual release handle. Manually open and close the door. If the door is binding, call for garage door service. If the door is not binding or unbalanced, adjust the DOWN (close) force. See Adjustment Step 2.

Adjustment Step 2

Adjust the Force

Force adjustment controls are located on the right side panel of the opener. Force adjustment settings regulate the amount of power required to open and close the door.

The door will stop in the up direction if anything interferes with its travel. The door will reverse in the down direction if anything interferes with its travel (including binding or unbalanced doors).

If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. Weather conditions can affect the door movement, so occasional adjustment may be needed.

The maximum force adjustment range is 260 degrees, about 3/4 of a complete turn. Do not force controls beyond that point. Turn force adjustment controls with a screwdriver.

Adjustment Label

WARNING

Too much force on the door will interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or kill someone under it. Do not increase the force beyond the minimum amount required to close the door. Do not use the force adjustments to compensate for a binding or sticking garage door. Test the safety reverse system following all adjustments to force levels. See page 26.

Right Side Panel of Opener

How and When to Adjust the Forces

Test the DOWN (close) force

Grasp the door bottom when the door is about halfway through DOWN (close) travel. The door should reverse. Reversal halfway through down travel does not guarantee reversal on a one-inch obstruction. See page 26. If the door is hard to hold or doesn't reverse, decrease the DOWN (close) force by turning the control counterclockwise.

Make 10 degree turn adjustments until the door reverses normally. After each adjustment, run the opener through a complete cycle.

Test the UP (open) force

Grasp the door bottom when the door is about halfway through UP (open) travel. The door should stop. If the door is hard to hold or doesn't stop, decrease UP (open) force by turning the control counterclockwise. Make 10 degree turn adjustments until the door stops easily. After each adjustment, run the opener through a complete travel cycle.

If the door doesn't open at least 5 feet

Increase UP (Open) force by turning the control clockwise. Make 10 degree turn adjustments until door opens completely. Re-adjust the UP limit if necessary. After each adjustment, run the opener through a complete travel cycle.

If the door reverses during the down (close) cycle and the opener lights aren't flashing

Increase DOWN (close) force by turning the control clockwise. Make 10 degree turn adjustments until the door completes a close cycle. After each adjustment, run the opener through a complete travel cycle. Do not increase the force beyond the minimum amount required to close the door.

Adjustment Step 3 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, and the opener lights 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 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 bar until down travel is completed.

WARNING

Without a properly working safety reversing sensor, persons (particularly children) could be seriously injured or killed if trapped by a closing garage door. Repeat this test once a month.

Adjustment Step 4 Test the Safety Reverse System

Test:

• With the door fully open, place 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 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.
• 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 22.

- When the door reverses on the 2x4 laid flat, 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.

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.

WARNING

Failure to test and adjust the safety reverse system may result in serious injury or death to perons trapped by a closing garage door. Repeat this test once a month and adjust as needed.

IMPORTANT SAFETY INSTRUCTIONS

WARNING

WARNING

To reduce the risk of severe injury or death to persons:

1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Do not permit children either to operate or to play with the opener. Keep remote control in a location inaccessible to children.
3. Operate opener only when the door is in full view and free from any obstruction. Keep the door in sight until it is completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.
4. Check safety reversal system monthly. See page 26. The garage door MUST reverse on contact with a one-inch object (or a 2x4 board laid flat) placed on the floor. If an adjustment is made to either the force or the limit of travel, both adjustments may be needed and the safety reversal system must be checked. Failure to properly adjust the opener may result in severe injury or death.
5. If possible, use the manual release only when the door is in a closed position. Caution should be taken whenever the disconnect cord is actuated with the door open. Weak or broken springs may cause the door to fall rapidly, causing injury or death to persons.
6. KEEP GARAGE DOORS PROPERLY BALANCED. See page 3. An improperly balanced door may not reverse when required and could result in severe injury or death. Repairs to cables, spring assemblies and other hardware must be made by a professional garage door person.
7. Disconnect the electric power from the garage door opener before making any repairs or removing the covers.
8. SAVE THESE INSTRUCTIONS.

Care of Your Opener

Limit and force adjustment controls

Limit Controls

Adjustment Label (Located on the left side panel)

Force Controls

Adjustment Label (Located on the right side panel)

Weather conditions may cause some minor changes in door operation requiring some re-adjustments, particularly during the first year of operation.

Pages 24 and 25 refer to the limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully.

Repeat the safety reverse test (page 26) after any adjustment of limits or force.

The remote control transmitter:

The opener must learn the code of any new remote control. Page 29 explains how to program your receiver and how to erase all codes if required. Self service of your radio controls and remote controls is not recommended. If service is needed, call the toll-free number listed on the back page.

The remote control battery:

The lithium battery should produce power for up to 5 years. To replace the battery, pry open case with visor clip or screwdriver, as shown. Insert battery positive side up.

Dispose of your old battery properly.

WARNING

Keep batteries away from small children. If swallowed, promptly notify doctor.

Maintenance Schedule

Once a Month

Manually operate door. If it is unbalanced or binding, call for professional garage door service.

Check to be sure door opens & closes fully. Adjust limits and/or force if necessary. (See pages 24 and 25.)

Repeat the safety reverse test. Make any necessary adjustments. (See page 26.)

Once a Year

Oil door rollers, bearings and hinges. The opener does not require additional lubrication. Do not grease the door tracks.

Operation of Your Opener

Activate the opener with any of the following:

• The Remote Control Transmitter. Hold push button down until the door starts to move.
• The Door Control. Hold push bar down until the door starts to move.
  • The Outside Keylock or Keyless Entry. (See Accessories)

When the opener is activated:

1. If open, the door will close. If closed, it 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. If the obstruction interrupts the sensor beam, the opener lights will blink for 5 seconds.
6. If obstructed while opening, the door will stop.
7. If fully open, the door will not close when the beam is broken. The sensor has no effect in the opening cycle.

If the sensor is not correctly installed and aligned, the door won't close from any remote control transmitter. You can close the door with the Door Control, the Outside Keylock, 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 Lights will turn on under the following conditions: When the opener is initially plugged in; when the power is restored after interruption; when the opener is activated. It will turn off automatically after 4-1/2 minutes or provide constant light when the Light feature is activated. Bulb size is 75 watts maximum.

This door control contains a motion detector that will automatically turn on the light when it detects a person entering the garage. This feature can be easily turned off for extended work light use.

Door Control Push Bar: Press to open or close the door. Press again to reverse the door during the closing cycle, or to stop the door while it is opening.

Light Feature: Press the Light button to switch the opener light on or off. When the door is opened or closed, the light will remain on for 4-1/2 minutes. Press the Light button to turn it off sooner. The Light button will not control the opener light when the door is in motion. When using the opener lights as working lights, we recommend that you first disable the motion sensor. See Automatic Light Feature, following. The 4-1/2 minute interval can be changed to 1-1/2, 2-1/2, or 3-1/2 minutes as follows: Press and hold the Lock button until the light blinks (about 10 seconds).

WARNING

Weak or broken springs could allow an open door to fall (either rapidly or unexpectedly), resulting in serious injury, death or property damage. If possible, use the manual release rope and handle only when the door is fully closed.

One blink indicates that the timer is reset to 1-1/2 minutes. Repeat the procedure and the light will blink twice, resetting the timer to 2-1/2 minutes. Repeat again for a 3-1/2 minute interval, etc., up to a maximum of four blinks and 4-1/2 minutes.

Automatic Light Feature: The opener light will turn on automatically when a person enters the garage. When a person walks in front of the door control, the light will come on for five minutes, then shut off. This feature works by detecting body heat and may not work in temperatures around 100°F.

To disable this feature, slide the Detector Switch on the right side of the door control down (off).

We recommend that you disable the motion sensor when using the opener lights as working lights. Otherwise, they will turn off automatically if you are working beyond the sensor's range.

Energy Saving Feature: This door control senses the brightness inside the garage, and will not turn the light on if it is already bright enough. If the light sensor turns on the light when it is not needed or does not turn it on when it is dark, the sensitivity can be adjusted. Remove the push bar cover by gently prying off the top edge with a coin or screwdriver. Underneath there is a dial below the red light on the right side. Use a small screwdriver to turn the dial toward "L" (counterclockwise) to make the light come on, or toward "H" (clockwise) to make the light go off. Replace the cover by inserting top tabs and snapping into place.

Lock Feature: Designed to prevent operation of the door from portable remote controls. However, the door will open and close from the Door Control push bar and from the Outside Keylock and the Keyless Entry accessories.

To activate: Press and hold the Lock button for 2 seconds. The push button indicator light will flash as long as the lock is on.

To turn off: Press and hold the Lock button again for 2 seconds. The indicator light will stop flashing. Normal operation will resume. The Lock feature will also turn off whenever the Smart button on the opener end panel is activated.

TO OPEN THE DOOR MANUALLY

To open the door

manually: The door should be fully closed if possible. Pull down on the manual release handle and lift the door manually. To reconnect the door to the opener, press the Door Control push bar.

Manual disconnect position

The lockout feature prevents the trolley from reconnecting automatically. Pull the manual release handle down and back (toward the opener). The door can then be raised and lowered manually as often as necessary. To disengage the lockout feature, pull the manual release handle straight down. The trolley will reconnect on the next UP or DOWN operation.

Lockout position

Receiver and Remote Control Programming

NOTICE: To comply with FCC/IC rules, adjustment or modifications of this receiver and/or transmitter are prohibited, except for changing the code setting or replacing the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS.

SECURITY+

Your garage door opener receiver and remote control transmitter have been set at the factory to a matching code. The door will open when you press the LARGE remote control push button.

Your SECURITY+ opener will operate with:

• several SECURITY+ remote controls utilizing up to 8 functions. NOTE: Open/Close/Stop operation counts as 1 function.
  • one Keyless Entry System (with SECURITY+ logo)

Follow the instructions below to program your opener to match any additional remotes you may purchase. See Accessories on page 34.

To Add A Remote Control

1. Press and hold the selected remote control push button. See Figure 1.
2. Press and release the "Smart" (learn) button on the right side of the opener (see Figure 2). The indicator light on the panel will begin to blink and the opener lights will flash once.
3. Release the remote push button.

Now the opener will operate when that remote control button is pressed. Test it by pressing the remote button to see that the door goes up and down.

Adding a remote can also be done from the door control, as follows:

1. With the door closed, press and hold a remote push button.
2. Press and hold the Light button on the door control.
3. Press and hold the door control push bar.
4. After the opener lights flash, release all buttons.
   Test by pressing the remote push button.

To Erase All Remote Control Codes

Press and hold the "Smart" button on the opener panel until the indicator light turns off (about 6 seconds). All transmitter codes are now erased. Then follow the steps above to re-program each remote control.

To Control the Opener Lights

With SECURITY+ transmitters, a remote push button can be programmed to operate the opener lights without opening the door.

1. With the door closed, press and hold the remote button that you want to control the light.
2. Press and hold the Light button on the door control.
3. Press and hold the Lock button on the door control.
4. After the opener lights flash, release all buttons.

Test by pressing the remote push button. The opener lights should turn on or off but the door should not move.

WARNING

Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Do not allow children to operate the Door Control or remote control transmitter(s).

A moving garage door could injure or kill someone under it. Activate the opener only when you can see the door clearly, it is free of obstructions, and is properly adjusted.

Model 973LM SECURITY+ 3-Channel Remote Control

Figure 1
Select a push button

Figure 2
SECURITY+ Garage Door Opener

Diagram of a device rear panel with labeled ports and a knob (no readable text or symbols)

RIGHT PANEL

Code programming instructions are also located on the opener panel.

Open/Close/Stop Operation

Your SECURITY+ remote control can be programmed to operate one door using all 3 buttons: the large button will only open the door, the middle button will only close the door, and the third button will stop the door's movement. You may set up this feature as follows:

1. With the door closed, press and hold the large remote push button.
2. Press and hold the Lock button on the door control.
3. Press and hold the door control push bar.

When the opener lights flash, release all buttons. Test by pressing the large (Open) button on the remote. The door should open. Press it again while the door is open and nothing should happen. Press the middle (Close) button and the door should close. Press the third (Stop) button while the door is moving and it should stop immediately.

Model 976LMC SECURITY+ Keyless Entry

Follow instructions on page 34 (Accessories).

Having a Problem?

Situation Probable Cause & Solution

The opener doesn't operate from either the Door Control or the remote control:	Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)Have you disabled all door locks? Review installation instruction warnings on page 7.Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction.The garage door spring may be broken. Have it replaced.Repeated operation may have tripped the overload protector in the motor. Wait 15 minutes. Try again.
Opener operates from the remote, but not from Door Control:	Is the door control lit? If not, remove the bell wire from the opener terminals. Short the red and white terminals by touching both terminals at the same time with a piece of wire. If the opener runs, check for a faulty wire connection at the door control, a short under the staples, or a broken wire.Are the wiring connections correct? Review Step 6, page 14.
The door operates from the Door Control, but not from the remote control:	Is the door push bar flashing? If your model has the Lock feature, turn it off.Your opener needs to re-learn a remote control code. Refer to instructions on the opener panel.Program the receiver to match the remote control code.Repeat the receiver programming procedure with all remote controls.
The remote control has short range:	Change the location of the remote control in your car.Check to be sure the antenna on the side or back panel of opener extends fully downward.Some installations may have shorter range due to a metal door, foil backed insulation, or metal garage siding.
Opener noise is disturbing in living quarters of home:	If operational noise is a problem because of proximity of the opener to the living quarters, the Vibration Isolator Kit 41A3263 can be installed. This kit was designed to minimize vibration to the house and is easy to install.
The garage door opens and closes by itself:	Be sure that all remote control push buttons are off.Remove the bell wire from the door control terminals and operate from the remote only. If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between the door control and the opener.Clear memory and reprogram all remote controls.
The door doesn't open completely:	If the door has been working properly but now doesn't open all the way, increase the up force. See page 25.Is something obstructing the door? Remove the obstruction or repair the door.If door opens at least 5 feet, the travel limits may need to be increased. One turn equals 2 inches of travel. See page 24.Repeat the safety reverse test after the adjustment is complete.
The door stops but doesn't close completely:	Review the travel limits adjustment procedures on page 24.Repeat the safety reverse test after any adjustment of door arm length, close force or down limit.

Having a Problem? (continued)

Situation Probable Cause & Solution

The door opens but won't close:	1. If the opener lights blink, check the safety reversing sensor. See page 19.2. If the opener lights do not blink and it is a new installation, check the down force.See Adjustment Step 2, page 25. 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:	1. Is something obstructing the door? Pull the manual 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 25.4. If door reverses in the fully closed position, decrease the travel limits (page 24).Repeat safety reverse test after adjustments to force or travel limits. The need for occasional adjustment of the force and limit settings is normal. Weather conditions in particular can affect door 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 19.
The opener lights:	... don't turn on:Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener bulb if regular bulb burns out... don't turn off:Is the Light feature on? Turn it off.
The opener strains or maximum force is needed to operate door:	The door may be out of balance or the springs are broken. Close the door and use the manual 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 its springs. If it does not, disconnect the opener and call a professional garage door serviceman. Do not increase the force to operate the opener.
The opener motor hums briefly, then won't work:	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 door lock. If the belt was removed and reinstalled, the motor may be out of phase. Remove the belt; 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 belt.Repeat the safety reverse test after the adjustment is complete.
The opener won't operate due to power failure:	1. Use the manual release to disconnect the trolley. The door can be opened and closed manually. When the power is restored, press the Door Control push bar and trolley will automatically reconnect (unless trolley is in lockout position.) See page 28.2. The Outside Quick Release accessory (for use on garages with no service door) disconnects the trolley from outside the garage in case of power failure.

Repair Parts

Rail Assembly Parts

KEY PART

NO. NO. DESCRIPTION

1 1A995 Master link kit
2 41A3588-1 Belt pulley bracket
3 41B3869-1 Complete trolley assembly
4 183B99 One-piece T-rail
5 41A3589-12 Full belt assembly
6 41B4103 Tensioner assembly
7 109B33 Trolley clip

Installation Parts

KEY PART

NO. NO. DESCRIPTION

1 41C0472-3 Motion detecting door control panel
2 41A5056-3 3-channel remote control housing (no circuit board)
3 10A20 3V2032 Lithium battery
4 29B137 Transmitter visor clip
5 41A2828 Manual release rope & handle assy.
6 217A238 2-conductor bell wire, white & white/red
7 41A5047-1 Door bracket w/clevis pin & fastener
8 41A4353-1 Header bracket w/clevis pin & fastener
9 41A5034 Safety sensor kit

(receiving and sending eyes)

with 3' 2-conductor bell wire attached

10 178B34 Straight door arm section
11 178B35 Curved door arm section
12 41A5266-1 Safety sensor brackets (2)

NOT SHOWN

41A2770-5 Installation hardware bag

(includes hardware listed on page 5).

114A2478 Owner's manual

Technical line drawing of a mechanical clamp or bracket component (no text or symbols)

Repair Parts

Opener Assembly Parts

KEY PARTNO. NO. DESCRIPTION

KEY PARTNO. NO. DESCRIPTION

1 41A4371 Belt cap retainer2 41A4885-2 Gear and sprocket assemblyComplete with:Spring washerThrust washerRetaining ringBearing plateRoll pins (2)Drive gear and worm gearHelical gear w/retainer and grease3 41A2817 Drive/worm gear kit w/greaseRoll pins (2)4 41B4245 Line cord5 41C4876 Wire harness assembly with plug6 41A5021-5E Receiver logic board assemblyComplete with: Logic board,End panel w/all labels7 41A4888 End panel w/all labels8 4A1344 Light socket9 108D34 Lens

10 30B363 Capacitor - 1/2HP11 12A373 Capacitor bracket12 41D3150 Terminal block w/screws13 41C4842 Universal replacement motor &bracket assemblyComplete with: Motor, worm,bracket, bearing assembly, RPM sensor14 41A3583-7 Cover15 41A2818 Helical gear & retainer w/grease16 41D3452 Limit switch assembly17 41C4398A RPM sensor assembly18 41A2826-1 Shaft bearing kit19 41A2822A Interrupter cup assembly20 41A4889 End panelNOT SHOWN41A2825 Opener assembly hardware kit(includes screws not designatedby a number in illustration).

Accessories Available For Your Opener

Model 1702LMC	Outside Quick Release:Required for a garage with NO access door.	Model 59LMC	Outside Keylock:Opens the garage door automatically from outside when remote control is not handy.
Model 1778LMC	8 foot Complete Rail:To allow an 8 foot door to open fully.	Model 973LMC	SECURITY+ 3-Channel Remote Control:Includes visor clip.
Model 1770LMC	10 foot Complete Rail:To allow a 10 foot door to open fully.	Model 974LMC	SECURITY+ 4-Channel Remote Control:Includes visor clip.
Model 97LMC	Extension Brakcets:(Optional) For safety sensor installation onto the wall or floor.	Model 970LMC	SECURITY+ 3-Channel Mini Remote Control:With key ring and Velco fastening strip.
Model 976LMC	SECURITY+ Keyless Entry:Enables homeowner to operate garage door opener from outside by entering code on specially designed keyboard. Also can add a temporary pass code for visitors or service persons. This temporary code can be limited to a programmable number of hours or entries.	Model 98LMC	Motion Detecting Door Control Panel:Multi-function door control with motion sensor that automatically turns opener lights on for 5 minutes when it detects a person entering the garage. Sensor can be easily deactivated when desired.

To Add the Keyless Entry

We recommend that you program your code before you install the Keyless Entry. You will not need assistance, and you can test the reception at the mounting location before installation.

1. Choose a 4-digit code using numbers from 0 to 9 (a number can be used more than once, for example, 4, 0, 4, 1).
2. Press the four buttons for the code, then press and hold the Enter button. The indicator light on the door opener panel will blink.
3. Press and release the "Smart" (learn) button on the opener panel. After the opener lights flash, release the Enter button.

Test by pressing the code, then press Enter. The door should begin to move.

You may also program the Keyless Entry from the Multi-Function Door control, as follows:

1. With the door closed, enter the four digit code desired, then press and hold Enter.
2. Press and hold the light button on the door control.
3. Press and hold the door control push bar.
4. After the opener lights flash, release all buttons.

Index

Access Door/Outside Quick Release Accessory....4, 34

Electrical Safety Warnings....2, 7, 16, 27

Garage Door

Testing for balance, binding and sticking....3, 25, 27

Determining high point of travel:

Sectional Door 8

One-Piece Door 8,9

Disabling existing locks....3,7

Force Controls

Adjustment Procedures 25

Problems that might require Force adjustments....30, 31

Safety Warnings 25, 27

Door hardware 3,7,8,12,14,27,28

Maintenance Instruction Label....7, 14

Reinforcement requirements 4, 20, 21

Removing of all ropes....3,7

Possible door damage....3, 4, 12, 20

Travel Limits

Adjustment Procedures 24

Problems that might require Limit adjustments....30, 31

Safety Warnings 15, 27, 28

Manual Release Rope & Handle

Lockout Feature....28

Manual Disconnect....28, 31

Safety Warnings 24, 27

Opener Terminals

Door Control Connections 14

Safety Reversing Sensor Connections....19

Outside Keylock Accessory Connections....14

Protector System ^® 17,26

Receiver and Remote Controls

Programming the receiver ....29

Erasing all codes 29

Safety warning....29

Problems with transmitter operation ....30

Safety Reverse Test Procedure....26

Testing required....7, 26, 30, 31

Safety Reverse System Problems

Securing header bracket to wall 8

Adjusting travel limits....24

Applying excessive force on the door 25

Buckling or uneven floor 4,26

Safety Warnings....2, 3, 6, 7, 8, 12, 13, 14, 15, 16, 17, 20, 24, 25, 26, 27, 28, 29

User Instruction Label for garage wall 7,14

Vibration Noise (isolator kit)....30

LIFT-MASTER SERVICE IS ON CALL

OUR LARGE SERVICE ORGANIZATION SPANS AMERICA AND CANADA

INSTALLATION AND SERVICE INFORMATION IS AS NEAR AS YOUR TELEPHONE SIX DAYS A WEEK. SIMPLY DIAL OUR TOLL FREE NUMBER:

1-800-654-4736

HOURS: (Central Std. Time)

6:00 A.M. TO 7:00 P.M. - Monday through Friday 8:00 A.M. TO 6:00 P.M. - Saturday

For professional installation, parts and service, contact your local LIFT-MASTER/ CHAMBERLAIN dealer. Look for him in the Yellow Pages, or call our Service number for a list of dealers in your area.

HOW TO ORDER REPAIR PARTS

Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly.

WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION:

• PART NUMBER

• PART NAME

- MODEL NUMBER

ADDRESS ORDERS TO:

THE CHAMBERLAIN GROUP, INC.

Parts and Service Department

2301 N. Forbes Boulevard, Suite 104

Tucson, Arizona 85745

SERVICE INFORMATION

TOLL FREE NUMBER:

1-800-654-4736

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LIFT-MASTER GARAGE DOOR OPENER FIVE-YEAR LIMITED WARRANTY

The Chamberlain Group, Inc. ("Seller") warrants to the first retail purchaser of this product, for the residence in which this product is originally installed, that it will be free from any defect in materials and/or workmanship for a period of five years from the date of purchase. Additionally, the motor and belt are warranted for the lifetime of the product. The product must be used in complete accordance with Chamberlain's instructions for installation, operation and care. The proper operation of this product is dependent on your compliance with the Owner's Manual instructions regarding installation, operation, maintenance and testing. Failure to comply strictly with those instructions will void this warranty in its entirety. Please note that the safety reverse system, in order to operate properly with your garage door, must be adjusted and periodically tested in accordance with the Owner's Manual.

If, during the limited warranty period, it appears as though this product contains a defect which is covered by this limited warranty, CALL OUR TOLL FREE SERVICE NUMBER, BEFORE DISMANTLING THIS PRODUCT, AT (1-800-654-4736). Then send this product, pre-paid and insured, to our service center for warranty repair. You will be advised of shipping instructions when you call the toll free service number. Please include a brief description of the problem and a dated proof-of-purchase receipt with any product that is returned for warranty repair.

Products returned to Seller for warranty repair, which upon receipt by Seller are confirmed to be defective and covered by this limited warranty, will be repaired or replaced (at Seller's sole option) at no cost to you and returned pre-paid. Defective parts will be repaired or replaced with new or factory-rebuilt parts at Seller's sole option.

THIS LIMITED WARRANTY IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR OTHERWISE, AND OF ANY OTHER OBLIGATIONS OR LIABILITY ON SELLER'S PART. THIS LIMITED WARRANTY DOES NOT COVER NON-DEFECT DAMAGE, DAMAGE CAUSED BY IMPROPER INSTALLATION, OPERATION OR CARE (INCLUDING, BUT NOT LIMITED TO ABUSE, MISUSE, FAILURE TO PROVIDE REASONABLE AND NECESSARY MAINTENANCE, OR ANY ALTERATIONS TO THIS PRODUCT), LABOR CHARGES FOR DISMANTLING OR REINSTALLING A REPAIRED OR REPLACED UNIT, REPLACEMENT OF BATTERIES AND LIGHT BULBS, OR UNITS INSTALLED FOR NON-RESIDENTIAL USE.

THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE DOOR OR GARAGE DOOR HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT AND HINGES. ANY SERVICE CALL THAT DETERMINES THE PROBLEM HAS BEEN CAUSED BY ANY OF THESE ITEMS COULD RESULT IN A FEE TO YOU.

UNDER NO CIRCUMSTANCES SHALL SELLER BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES ARISING IN CONNECTION WITH THE USE OF, OR INABILITY TO USE, THIS PRODUCT. IN NO EVENT SHALL SELLER'S LIABILITY FOR BREACH OF WARRANTY, BREACH OF CONTRACT, NEGLIGENCE OR STRICT LIABILITY EXCEED THE COST OF THE PRODUCT COVERED HEREBY. NO PERSON IS AUTHORIZED TO ASSUME FOR US ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS PRODUCT.

Some provinces do not allow the exclusion or limitation of consequential, incidental or special damages, so the above limitation or exclusion may not apply to you. This limited warranty gives you specific legal rights, and you may also have other rights which vary from province to province.

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