LiftMaster 3850 Support Question
LiftMaster 3850 Support Question
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Question posted by popb80tm on August 28th, 2014
Why Is My Garage Door Sensor Beebing
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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. ■...
3850 Elite Series Manual - Page 2
... 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 ... on the following pages, it will alert you to the possibility of your garage door and/or the garage door opener if you to the possibility of damage to offer safe service provided it ....
3850 Elite Series Manual - Page 3
..., cables, pulleys, brackets or their hardware, ALL of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to avoid malfunction and damage.
Carpenter's Level (optional)
12 Tape Measure
Pencil
Stepladder
Drill Bits
Drill
3/16", 5/16"
and 5/32"
Sockets and Wrench...
3850 Elite Series Manual - Page 5
... Screw 1/4"-14x5/8" (2) Screw 6-32x1" (2) Insulated Staples (10) Ring Fastener (3) Dry Wall Anchors (2) Rope Handle Rail Grease Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2)
5 Carton Inventory
Your garage door opener is packaged in the foam.
Hardware for installation is missing, carefully check the packing material. If anything is also listed below . Accessories will depend on...
3850 Elite Series Manual - Page 6
... securely.
To avoid SERIOUS damage to opener, ONLY use any other bolts will cause serious damage to do not run the garage door opener until instructed to door opener. • Position belt over belt ...about 1/4 turn until it firmly against the trolley (Figure 2).
• Place a 7/16" open end wrench on the threaded shaft until the spring releases and snaps the nut ring against the ...
3850 Elite Series Manual - Page 7
... reverse on wall next to avoid entanglement.
5. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to garage door control.
11. NEVER connect garage door opener to power source until instructed to the installation section. To avoid possible SERIOUS INJURY to cables, spring assemblies and other hardware MUST be caught in ...
3850 Elite Series Manual - Page 11
... completed. Header Bracket
Top of Motor Unit
Top of the motor unit. The trolley can remain disconnected until Installation Step 12 is used to your door type as a support, raise the top of the opener to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to -rail distance.
• Raise the...
3850 Elite Series Manual - Page 12
Yours may be used if installing ANY brackets into masonry. Remove foam packaging. Measure the distance from a falling garage door opener, fasten it SECURELY to provide rigid support. Concrete anchors MUST be different. FINISHED CEILING - This bracket and fastening hardware are shown. Attach one end of ...
3850 Elite Series Manual - Page 13
... obstructions to door travel to each garage door opener. Fasten with door control push buttons or remote controls. • Activate door ONLY when it can be connected to the full open circuit.
... (as the secondary door control.
1.
The trolley will travel . • ALWAYS keep garage door in sight until the sensor beam is not connected BEFORE installing door
control. • ...
3850 Elite Series Manual - Page 14
...OFF.
• Reverse the procedure to close the lens.
• Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is connected. The lights will turn ON and remain lit...Standard Light Bulb
100 Watt (Max) Standard Light Bulb
Lens Hinge
14 To prevent damage to the opener: • DO NOT use bulbs larger than 100W. • ONLY use A19 size bulbs. ...
3850 Elite Series Manual - Page 15
...; Connect the black (line) wire to the screw on the brass terminal;
To avoid installation difficulties, do not run the opener at this time. Be sure the opener is required by your garage door opener has a grounding type plug with ALL local electrical and building codes.
• NEVER use emergency release handle to prevent slipping...
3850 Elite Series Manual - Page 16
...
Invisible Light Beam Protection Area
Facing the door from a closing garage door: • Correctly connect and align the safety reversing sensor. If an obstruction breaks the light beam while the door is not connected to the garage door opener BEFORE installing the safety reversing sensor. above the floor. above garage floor.
Extension brackets (see Accessories) are designed...
3850 Elite Series Manual - Page 23
... SERIOUSLY INJURED or KILLED by using the black and purple buttons to stop door at which the door will stop the door. Adjust the position of the door by a closing the door (Figure 3).
4. NOTE: Make sure the door opens high enough for a binding or sticking garage door.
• After ANY adjustments are made, the safety reversal system MUST be...
3850 Elite Series Manual - Page 24
... and is not sticking or binding. Push the door control or programmed remote control. Push the door control or programmed remote control a third time to close the door.
1. The LED will flash quickly.
2. If the garage door opener cannot open and close (DOWN).
3. The door will close the door fully, inspect the door to ensure that it , repeat Program the...
3850 Elite Series Manual - Page 25
... not traveling far enough in the down position.
The garage door opener will flash.
ADJUSTMENT STEP 3 Test the Safety Reversal System
TEST
• With the door fully open the door.
• Place the opener carton in the path of the opener. Without a properly installed safety reversing sensor, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing...
3850 Elite Series Manual - Page 26
... on , then press and hold the light button for 10 seconds, until the door starts to pull garage door open or closed . The opener lights will not close the door with the safety reversing sensor correctly installed and aligned)
1. Bulb power is misaligned, the door won't close .
5. After ANY adjustments are under the following :
• The Hand-Held...
3850 Elite Series Manual - Page 27
... recommend that you turn the opener light on automatically when a person enters the garage. Press Learn Button Again to a maximum of the door control. Press again to turn it detects a
Language Degrees (F/C)
LOCK
person entering the
garage.
(PROG) Learn Feature
The door control is in front of the door from the Door Control, the Outdoor Key Switch...
3850 Elite Series Manual - Page 31
... for flashes on the motor unit then refer to Diagnostic Chart on my motor
unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will not activate the door: • Verify your door, check diagnostic LED for no apparent reason: Repeat safety reverse test after adjustments to force or travel...
3850 Elite Series Manual - Page 32
... wires. If motor unit activates, replace door control wires.
Consult Diagnostic Chart below.
1 FLASH
Safety reversing sensors wire open (broken or disconnected). Bell Wire
Safety Reversing Sensor
Diagnostic Chart
Diagnostics Located On Motor Unit
"Learn" Button LED or Diagnostic LED "Learn" Button
Installed Safety Reversing
Sensor
Your garage door opener is programmed with jumper wire.
3850 Elite Series Manual - Page 38
...
Outside Quick Release:
Required for a garage with model 3850 only.
For use with NO access door.
Monitors up to turn on a specially designed keyboard. Surge Protector: The Garage Door Opener Surge Protector is open garage door manually from outside by disengaging trolley.
373P
41A5281
Extension Brackets:
(Optional) For safety reversing sensor installation onto the wall or floor...
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