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LiftMaster 3850 Support Question

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Question posted by danielrosa on February 10th, 2012

How Do I Replace The Travel Module Of A 3850 Model

The motor opens the door only 2 or 3 inches, then stops. also I try to set the upper and lower limits following the user manual without success

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Related LiftMaster 3850 Manual Pages

3850 Elite Series Manual - Page 1

® GARAGE DOOR OPENER Models 3850 3850-267 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com patible with See Page 29 for 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...

3850 Elite Series Manual - Page 2

... to trolley 21-22 Adjustment 23-25 Program the travel limits 23 Set the force 24 Test the safety reversal system 25 Test the Protector System 25 Operation 26-33 Operation safety instructions 26 Using garage door opener 26 Using the wall-mounted door control 27 Using the remote control 28 Troubleshooting 28 The remote control battery...

3850 Elite Series Manual - Page 3

... hardware, ALL of the opener, instructions will call for hand tools as shown. Preparing your garage door Before you begin: • Disable locks. • Remove any ropes connected to garage door. • Complete the following test to see if there is any binding or sticking. Raise and lower the door to make sure your garage door is balanced and is...

3850 Elite Series Manual - Page 4

... 12. Motor Unit Header Wall ONE-PIECE DOOR WITH TRACK Wallmounted Door Control Access Door Access Door Safety Reversing Sensor Gap between floor and bottom of Safety door must not exceed 1/4" (6 mm) Reversing Sensor 4 Safety Reversing Sensor Gap between floor and bottom Reversing Sensor Safety of door must not exceed 1/4" (6 mm). See page 19 for lightweight garage doors...

3850 Elite Series Manual - Page 5

...model purchased. LOCK LIGHT SLmCaDrtMCootniotrnolDPeatencetli®ng Door Control Console SECURITY✚® 3-Button Remote Control Models 3850 (1) 3850-267 (2) SECURITY✚® Keyless Entry Model 3850-267 (1) ONLY Motor... Nut 1/4"-20 (2) 5 Carton Inventory Your garage door opener is packaged in the foam. If anything is missing, carefully check the packing material.

3850 Elite Series Manual - Page 6

... avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted on the square end. Washered Bolt 5/16"-18x1/2" Rail Hole USE ONLY THIS TYPE AND SIZE BOLT Motor Unit Belt Pulley Rail Hole ASSEMBLY STEP 2 Set the Belt Tension • By hand, thread...

3850 Elite Series Manual - Page 7

... (or a 2x4 laid flat) on properly balanced and lubricated garage door. You have now finished assembling your garage door opener. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS. 2. Install garage door opener 7 feet (2.1 m) or more above floor. 7. Place manual release/safety reverse test label in garage door or opener mechanisms. 9. ALL repairs to the installation section...

3850 Elite Series Manual - Page 8

... shown here and on header wall or ceiling, otherwise garage door might not reverse when required. Open your door. 1. Header Wall 2" (5 cm) Track Highest Point of Travel Door Header Wall Track 2" (5 cm) Highest Point Door of Travel Door Pivot One-piece door without track: jamb hardware 8 One-piece door without track. Extend the line onto the header wall above the high...

3850 Elite Series Manual - Page 9

... ACTUAL SIZE Lag Screw 5/16"x9x1-5/8" Horizontal Line Highest Point of Garage Door Travel Garage Door Vertical Centerline of bracket holes (do not use lag screws to mount the header bracket. Make sure the arrow is pointing toward the ceiling). • Mark the vertical set of Garage Door CEILING HEADER BRACKET INSTALLATION • Extend the vertical centerline onto...

3850 Elite Series Manual - Page 13

... INJURY or DEATH from a closing garage door. DO NOT connect power and operate the opener at lower temperatures although the door control remains fully functional. Fasten with 6AB x 1-1/4" self-tapping screws (drywall installation) or 6-32 x 1" machine screws (into drywall, drill 5/32" holes and use model 378LM wireless wall control as follows: • Install bottom screw, allowing...

3850 Elite Series Manual - Page 14

... ON and remain lit for replacement. The use of the endpanel or light socket: • DO NOT use short neck or specialty light bulbs. • DO NOT use A19 size bulbs. Use ONLY incandescent. To prevent damage to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when...

3850 Elite Series Manual - Page 23

... button until the door is closed ) position. 6. Setting the DOWN position: 5. Figure 2 LED BLACK PURPLE Push and hold the purple button until the door reaches the desired UP (open ) limit and begins closing garage door. • Incorrect adjustment of garage door travel limits will stop when moving up or down. ADJUSTMENT STEP 1 Program the Travel Limits Travel limits regulate the...

3850 Elite Series Manual - Page 24

... binding. ADJUSTMENT STEP 2 Set the Force The force setting measures the amount of safety reversal system. • NEVER use force adjustments to compensate for the force to ensure that it is balanced properly and is not stopping exactly where you would like it, repeat Program the Travel Limits. If the garage door opener cannot open and close the door (DOWN).

3850 Elite Series Manual - Page 25

... Steps 1 and 2 Program the Travel Limits and Set the Force. 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...

3850 Elite Series Manual - Page 26

... NEVER use emergency release handle to door travel limits) is initially plugged in the opening , the door will reverse. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED (see page 3). Using Your Garage Door Opener Your Security✚® opener and hand-held remote. When the opener is activated. However, you can be turned off as follows: With the opener lights off , then on the floor...

3850 Elite Series Manual - Page 29

... ONLY LiftMaster part number 485LM for one to the motor unit for replacement battery. • DO NOT dispose of time. 29...To test the battery is functioning properly, open and close the garage door. • Re-connect the motor unit power cord back into the electrical... the battery when motor unit is fully charged. The motor unit's lights will last 3 to be limited until battery is unplugged...

3850 Elite Series Manual - Page 31

... when door is open: • The garage door opener is normal. If it does, deactivate the Lock Mode following the instructions for flashes on the motor unit then refer to Adjustment Step 1, Program the Travel Limits. Trolley 4. The need for occasional adjustment for the force and limit settings is equipped with a security light feature. If battery status LED is against the stop...

3850 Elite Series Manual - Page 32

Consult Diagnostic Chart below. 1 FLASH Safety reversing sensors wire open (broken or disconnected). Symptom: Door travels 2-3 inches and stops. • Reprogram limits and forces. If motor unit activates, replace door control. • If motor unit does not activate, disconnect door control wires from back each of motor unit. • Remove sensors from brackets and shorten ...

3850 Elite Series Manual - Page 38

... with model 3850 only. Laser Park Assist: Laser enables homeowners to the garage door opener. Also can be limited to turn on a specially designed keyboard. Includes battery. Wireless Door Control: Push bar, light feature and auxiliary button. Enables homeowner to protect LiftMaster® garage door openers against damage from outside by adding additional sensor modules. 485LM...

3850 Elite Series Manual - Page 40

... FOR THE MOTOR AND BELT, AND NO IMPLIED WARRANTIES WILL EXIST OR APPLY AFTER SUCH PERIOD. ANY SERVICE CALL THAT DETERMINES THE PROBLEM HAS BEEN CAUSED BY ANY OF THESE ITEMS COULD RESULT IN A FEE TO YOU. THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE DOOR OR GARAGE DOOR HARDWARE...