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30

Having a Problem (Troubleshooting)

NOTE: 

Always unplug battery prior to troubleshooting.

1. My door will not close and the light bulbs blink on

my motor unit:

The safety reversing sensor must be

connected and aligned correctly before the garage
door opener will move in the down direction.

V

erify the safety reversing sensors are properly

installed, aligned and free of any obstructions. Refer
to 

Installation Step 10: Install The Protector System

®

.

• Check diagnostic LED for flashes on the motor unit

then refer to the 

Diagnostic Chart 

on the

following page.

2. My remotes will not activate the door:

V

erify your Motion Detecting Control Console does

not display “Lock Mode.” If it does, deactivate the
Lock Mode following the instructions for 

Using the

Motion Detecting Control Console.

• Reprogram remotes following the programming

instructions. Refer to 

Programming

• If remote will still not activate your door, check

diagnostic LED for flashes on motor unit then refer to

Diagnostic Chart

on the following page.

3. My door reverses for no apparent reason:

Repeat

safety reverse test after adjustments to force or travel
limits. The need for occasional adjustment for the force
and limit settings is normal. Weather conditions in
particular can affect door travel.

• Manually check door for balance or any binding

problems. 

• Refer to 

Adjustment Step 2, Setting the Force.

4. My door reverses for no apparent reason after fully

closing and touching the floor:

Repeat safety

reverse test after adjustments to force or travel limits.
The need for occasional adjustment for the force and
limit settings is normal. Weather conditions in particular
can affect door travel.

• Refer to 

Adjustment Step 1, Program the Travel

Limits.

Decrease down travel.

5. My lights will not turn off when door is open:

• The garage door opener is equipped with a security

light feature. This feature activates the light on when
the safety reversing sensor beam has been
obstructed. Refer to Operation section; Using the

Wall Mounted Control Console, Light Feature.

Bell 

W

ire 

Safety Re

v

ersing Sensor

Diagnostics
Located On
Motor Unit

 

“Learn”
 B

u

tton

 LED or
 Diagnostic
     LED 

Recei

v

ing Eye 

Safety Re

v

ersing Sensor 

(Green Indicator Light)

Sending Eye Safety 
Re

v

ersing Sensor 

(Am

b

er Indicator Light)

6. My motor unit hums briefly:

• First verify that the trolley is against the stop bolt.

• Release the door from the opener by pulling the

Emergency Release Rope.

• Manually bring the door to a closed position.

• Loosen the belt by adjusting the 

outer nut

4 to 5

turns. This relieves the tension.

• Run the motor unit from the remote control or control

console. The trolley should travel towards the door
and stop. If the trolley re-engages with the door, pull
the Emergency Release Rope to disengage.

• Decrease the UP travel by turning the UP Travel

adjustment screw 2 full turns 

away

from the arrow.

• Re-Tighten the outer nut until the trolley spring is

approximately 1-1/4" (3.18 cm) in length.

• If the trolley does not move away from the bolt,

repeat the steps above.

7. If battery status LED is not lit properly:

• Check battery connections.

1-1/4"

(3.18 cm)

Trolley

Содержание LiftMaster Professional Security+ 3850

Страница 1: ...e 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...

Страница 2: ...a problem Troubleshooting 30 Diagnostic chart 31 Programming 32 33 To add or reprogram a hand held remote control 32 To erase all codes from motor unit memory 32 3 Button remotes 32 To add reprogram o...

Страница 3: ...arage door Before you begin Disable locks Remove any ropes connected to garage door Complete the following test to make sure your garage door is balanced and is not sticking or binding 1 Lift the door...

Страница 4: ...and height of your garage door Survey your garage area to see if any of the conditions below apply to your installation Additional materials may be required You may find it helpful to refer back to t...

Страница 5: ...l Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated below Accessories will depend on the model purchased If anything is missing carefully check...

Страница 6: ...t WARNING CAUTION ASSEMBLY STEP 2 Set the Belt Tension By hand thread the spring trolley nut on the threaded shaft until it is finger tight against the trolley Figure 1 Do not use any tools Insert a s...

Страница 7: ...ATH 3 ALL repairs to cables spring assemblies and other hardware MUST be made by a trained door systems technician BEFORE installing opener 4 Disable ALL locks and remove ALL ropes connected to garage...

Страница 8: ...the door NOTE If the total number of inches exceeds the height available in your garage use the maximum height possible or refer to page 9 for ceiling installation To prevent possible SERIOUS INJURY...

Страница 9: ...age Door Header Wall Garage Door UP CEILING MOUNT ONLY Wall Mounting Holes Optional Wall Mounting Holes The nail hole is for positioning only You must use lag screws to mount the header bracket UP CEI...

Страница 10: ...tach the Rail to the Header Bracket Position the opener on the garage floor below the header bracket Use packing material as a protective base NOTE If the door spring is in the way you ll need help Ha...

Страница 11: ...ner 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 rail If the top section or pa...

Страница 12: ...t is not centered above the door 7 Remove the 2x4 Operate the door manually If the door hits the rail raise the header bracket 8 Grease the top and underside of the rail surface where the trolley slid...

Страница 13: ...wire with a staple creating a short or open circuit 4 Strip 7 16 11 mm of insulation from end of bell wire Connect bell wire to the quick connect terminals as follows white to white and white red to r...

Страница 14: ...dard light bulbs The use of short neck or speciality light bulbs may overheat the endpanel or light socket Lens Hinge 100 Watt Max Standard Light Bulb Release Tab 100 Watt Max Standard Light Bulb INST...

Страница 15: ...n cord 2 wire adapter or change plug in ANY way to make it fit outlet Be sure the opener is grounded Ground Tab Green Ground Screw Ground Wire Black Wire PERMANENT WIRING CONNECTION White Wire Black W...

Страница 16: ...e lens The mounting brackets are designed to clip onto the track of sectional garage doors without additional hardware If it is necessary to mount the units on the wall the brackets must be securely f...

Страница 17: ...the lip hugging the back edge of the track Figure 1 If your door track will not support the bracket securely wall installation is recommended Wall installation Figure 2 3 Place the bracket against the...

Страница 18: ...ed 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 sende...

Страница 19: ...ollows depending on your door s construction Metal or light weight doors using a vertical angle iron brace between the door panel support and the door bracket Drill 3 16 fastening holes Secure the doo...

Страница 20: ...INUM STEEL DOORS WITH GLASS PANEL ETC NOT PROVIDED ONE PIECE DOORS Please read and comply with the warnings and reinforcement instructions on the previous page They apply to one piece doors also Cente...

Страница 21: ...ole alignment alternative If holes in curved arm are above holes in straight arm disconnect straight arm Cut about 6 15 cm from the solid end Reconnect to trolley with cut end down as shown Bring arm...

Страница 22: ...olley from the inner trolley by pulling straight down on the emergency release handle and sliding the outer trolley back toward the motor unit Connect the curved door arm section to the trolley using...

Страница 23: ...ack and purple buttons to reach the desired closed position 7 Push the remote control or the door control Figure 3 This sets the DOWN close limit and should bring the door to the open position If the...

Страница 24: ...e LED Indicator Light will stop flashing when the force has been learned The opener has learned the forces required to open and close your door The door must travel through a complete cycle UP and DOW...

Страница 25: ...ustment If the unit continues to fail the Safety Reverse Test call for a trained door systems technician IMPORTANT SAFETY CHECK Test the Safety Reverse System after Each adjustment of door arm length...

Страница 26: ...Lights will also turn on when someone walks through the open garage door With a Motion Detecting Door Control Console this feature may be turned off as follows With the opener lights off press and ho...

Страница 27: ...n or heat differential is calculated 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 ope...

Страница 28: ...or disposal instructions WARNING CAUTION WARNING WARNING Battery Status LED Battery Backup Optional OPERATING INSTRUCTIONS 1 Test the installed battery with the motor unit To test the battery disconne...

Страница 29: ...or screwdriver blade to pry open the case as shown Insert battery positive side up Dispose of old battery properly NOTICE To comply with FCC and or Industry Canada IC rules adjustment or modification...

Страница 30: ...or Repeat safety reverse test after adjustments to force or travel limits The need for occasional adjustment for the force and limit settings is normal Weather conditions in particular can affect door...

Страница 31: ...do not light replace the safety reversing sensors Symptom LED is not lit on control console Inspect control console wires for a short staple in wire replace as needed Disconnect wires at control cons...

Страница 32: ...heard 1 Press and release the learn button on the motor unit The learn indicator light will glow steadily for 30 seconds 2 Within 30 seconds press and hold the button on the hand held remote that you...

Страница 33: ...using a ladder 1 Press the four buttons for the present PIN then press and hold the button The opener light will blink twice Release the button 2 Press the new 4 digit PIN you have chosen then press E...

Страница 34: ...onsole 2 373LM 3 Button remote control 3 10A20 3V2032 Lithium battery 4 29B137 Remote control visor clip 5 41A2828 Emergency release rope and handle assembly 6 41B4494 1 2 Conductor bell wire white wh...

Страница 35: ...6282 Battery wires and plug 41A6327 Light socket wires and plug 41A6328 RPM passpoint wires with plug 5 41D794 Motor with positioning sensor 6 41DB002 2 Receiver logic assembly KEY PART NO NO DESCRIPT...

Страница 36: ...outside by entering a password on a specially designed keyboard Also can add a temporary password for visitors or service persons This temporary password can be limited to a programmable number of ho...

Страница 37: ...37 NOTES...

Страница 38: ...38...

Страница 39: ...39...

Страница 40: ...ULAR PURPOSE ARE LIMITED IN DURATION TO THE FIVE YEAR LIMITED WARRANTY PERIOD SET FORTH ABOVE EXCEPT THE IMPLIED WARRANTIES WITH RESPECT TO THE MOTOR AND BELT WHICH ARE LIMITED IN DURATION TO THE LIFE...

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