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LiftMaster 3950 Support Question

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Question posted by bgh0612 on August 31st, 2012

3950 Error Code

My 3950 Will not close the door. The error code is 9 blinks which indicates the facory jumper is loose or missing, This is not the case. I even replaced the jumper and still the same result. Opener is 5-6 months old.

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Related LiftMaster 3950 Manual Pages

3950 Addendum Manual - Page 1

... bracket Model 3950MB. ADDENDUM DOOR COMPATIBILITY FOR MODEL 3950 IMPORTANT INSTALLATION INSTRUCTIONS It is locked in place while the door opens and closes. To order visit www.liftmaster.com or contact door supplier. NOTE: The inside mounting option takes away from clear door opening. DEAD SHAFT DOOR - Door Type Identiﬁcation Dead Shaft Door MOUNTING OPTIONS: 1 Standard wall...

3950 Addendum Manual - Page 2

... optional mounting bracket Model 3950MB, a minimum of the door opening. LIVE SHAFT REQUIREMENTS Live Shaft doors are automated by door brackets and the door guides. (Figure 2) Axle Drum Wall Drum Bracket Door Guide Figure 2 - Live Shaft Components Minimum Side Room The minimum amount of 3.75" clearance for the Model 3950. The assembly is required. (Figure 3) Wall 2.5" 11...

3950 Addendum Manual - Page 3

..., 3 equally spaced hole pattern. Bolt Clearance). DEAD SHAFT REQUIREMENTS Dead Shaft Door Construction Drum 2nd Drum Spring Axle Door Bracket Door Guide Figure 4 - Dead Shaft Door Construction Spring Clearance The Model 3950 requires that an extra drum (Figure 4 - 2nd Drum) is added on the door shaft to be obstructed by sliding the sprocket on the end...

3950 Addendum Manual - Page 4

Drum Holes To Inspect For Obstruction Door Construction The Dead Shaft Door must not have more than a 2" inset from the curtain edge to provide a maximum 3" of spacers that can be present) 2.25" Figure 5 - The Model 3950 comes with a selection of spacing. 4 Mounting Hole (PEM nut may be used in conjunction to the drum.

3950 Addendum Manual - Page 5

... the side on the mounting option for the desired operator mounting position. 5 For a standard wall mount to the outside of the door opening, a minimum of side room depends on which the Model 3950 is required for installation to the sprocket well and could derail the chain. Clearance 2" Max Inset 3" Bolt Clearance Figure 6 - If...

3950 Manual - Page 1

® DOOR OPERATOR Model 3950 For Light Duty Commercial Use The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com Com patible with Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ The door WILL NOT CLOSE unless The Protector System® is connected and properly...

3950 Manual - Page 2

...control (not provided 19 To erase all codes from electric shock. TABLE OF CONTENTS Introduction 2-4 Safety symbol review and signal word review 2 Preparing your door 3 Specifications 3 Carton inventory 4 Hardware ...System 15 To open door manually 15 Operation 16-18 Operation safety instructions 16 Using your operator 16 Care of your door and/or the door operator if you...

3950 Manual - Page 8

...jumper must be smooth and flat. 3. Door May Move at any Time Without Prior Warning Do Not Let Children Operate the Door or Play in the Door Area Keep Door...it can be in an open door falling rapidly and/or unexpectedly... CLOSED. Weak or broken springs or unbalanced door could result in...replace the control station cover. 5. Connect wires to prevent unraveling. FASTEN LABEL ADJACENT TO DOOR...

3950 Manual - Page 9

... wiring connection. • Door installation and wiring MUST be in contact with a third grounding pin. To reduce the risk of electric shock, your local code, refer to install the proper... To prevent possible SERIOUS INJURY or DEATH from unit. 5. Attach with ALL local electrical and building codes. • NEVER use an extension cord, 2-wire adapter or change plug in the back of ...

3950 Manual - Page 10

... and aligned correctly before the door operator will move in the path of its electronic beam. Be sure power is not connected to full open position. To prevent SERIOUS INJURY... (with a green indicator light). Either can be disabled. If it is NO HIGHER than 6" (15 cm) above floor Invisible Light Beam Protection Area Facing the door from a closing , the door will detect an obstacle...

3950 Manual - Page 12

.... 2. NOTE: When the invisible beam path is obstructed or misaligned while the door is closing, the door will glow steadily if wiring connections and alignment are correct. Be sure the lens is already open wire to the operator. If the green indicator light in both safety reversing sensors to the receiving eye. 3. Use insulated staples...

3950 Manual - Page 13

... the black and purple buttons. This sets the DOWN (close ). Black moves the door UP (open) and purple moves the door DOWN (close ) limit and the door should open ) limit and begins closing door. • NEVER learn forces or limits when door is closed position. 7. This sets the UP (open . This will stop the door. To prevent damage to vehicles, be SERIOUSLY INJURED...

3950 Manual - Page 14

... exactly where you would like it is balanced properly and is not sticking or binding. If the garage door opener cannot open and close the door. 1. The LED will close (DOWN). 3. The LED will open (UP). 4. Push the remote control or door control a third time to be tested. Figure 1 LED Black Button Purple Button Figure 2 Push Purple button twice...

3950 Manual - Page 15

... than an inch, and the operator lights will not close if the indicator light in either sensor is off (alerting you to close the door. Call for a trained door systems technician. The door should be fully closed . Without a properly installed safety reversing sensor, persons (particularly small children) could result in the path of persons and obstructions. ! ONLY use...

3950 Manual - Page 16

... the garage door opener properly may not reverse when required and could result in a partially open . 2. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPENED DOOR. 6. Weak or broken springs or unbalanced door could result in SEVERE INJURY or DEATH. 11. After ANY adjustments are no effect in sight until the door starts to disengage door ONLY when door is activated (with door control...

3950 Manual - Page 17

...: • Program the operator to match the remote control code. (Refer to instructions on the motor unit panel.) Repeat with all mounting hardware to 20 times without power. 13. Remove the obstruction or repair the door. 7. If it replaced (see Adjustment Step 1. 14. Open and close : • Check the safety reversing sensor. If it out...

3950 Manual - Page 18

... indicator light is programmed with jumper wire. If motor unit activates, replace door control wires. Motor unit "Learn" Button LED or Diagnostic LED "Learn" Button Diagnostic Chart 1 FLASH Safety reversing sensors wire open (broken or disconnected). See Adjustments section. • If the operator continues to reset. 9 FLASHES Factory installed jumper loose or missing. Symptom: The door...

3950 Manual - Page 19

...indicator light will cause the door to circumvent that you wish to the door closing will glow steadily for programming your door. 3. To Erase All Codes From Motor Unit Memory To deactivate any unwanted remote, first erase all codes... not installed or misaligned, the door will blink. 4. Press and release the purple "learn indicator light blinks and shuts off upon learning the...

3950 Manual - Page 20

... used to close the door even after it may authorize access by visitors or service people with a temporary 4-digit PIN. The operator light will blink once when the PIN has been learned. Test by pressing the new PIN, then press Enter. The motor unit lights will blink three times. The learn indicator light will blink. If...

3950 Manual - Page 22

... 8 feet (2.5 m). 373LM 3-Button Security✚® Remote Control : Includes visor clip. 22 EverCharge® Standby Power System: Provides backup power to prevent the door from being manually opened once closed. ACCESSORIES 41A5281 Extension Brackets: (Optional) For safety reversing sensor installation onto the wall or floor. 475LM 377LM 380LM Keyless Entry with Security✚...