Chamberlain LiftMaster Professional Security+ 3850 Owner'S Manual Download Page 35

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KEY

PART

NO.

DESCRIPTION

41C76

Belt cap and sprocket

41B4245

Line cord

41B4375-3

Terminal block with screws

41A6281

Wire harness kit

Complete with:

41A6282

Battery wires and plug

41A6327

Light socket wires and plug

41A6328

RPM/passpoint wires with plug

41D794

Motor with positioning sensor

41DB002-2

Receiver logic assembly

KEY

PART

NO.

DESCRIPTION

41A6231

End panel with battery door and
screw

41C190

Transformer and harness

41D504-4

Cover

108D79

Light lens

175B88

Light socket

NOT SHOWN

485LM

Battery kit

Motor Unit Assembly Parts

Summary of Contents for LiftMaster Professional Security+ 3850

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 37: ...37 NOTES...

Page 38: ...38...

Page 39: ...39...

Page 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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