LiftMaster 3255 Support Question
LiftMaster 3255 Support Question
Find answers below for this question about LiftMaster 3255.Need a LiftMaster 3255 manual? We have 1 online manual for this item!
Question posted by jav98 on March 13th, 2014
Spontaneous Operation
Liftmaster 3245M opens by itself, unexpectedly at random times without any movement in the garage or any remote activation.
Current Answers
Answer #1: Posted by TechSupport101 on March 13th, 2014 10:50 AM
TechSupport101
Member since:
May 24th, 2013 Points: 12,171,325
Member since:
May 24th, 2013 Points: 12,171,325
Hi. The spontaneous operation of this unit may be caused by one of the following:
- A short in the door transmitter.
- A fault in the motor unit.
- Faulty wiring between the motor unit to the wall button.
- A faulty wall button.
Related LiftMaster 3255 Manual Pages
3255 Manual - Page 1
®
GARAGE DOOR OPENER
Models 3245 1/3 HP 3255 1/2 HP 3255-2 1/2 HP
For Residential Use Only
The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196
www.liftmaster.com
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 unless the...
3255 Manual - Page 2
... 25
Test the Protector System 25
Operation
26-30
Operation safety instructions 26
Using your garage door opener 26
Using the wall-mounted door control 27
To open the door manually 27
Care of damage to your garage door opener 28
Having a problem 29
Diagnostic chart 30
Programming
31-32
To add or reprogram a hand-held remote control 31
To erase all...
3255 Manual - Page 3
... balanced and is out 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. Preparing your garage door
Before you begin: • Disable locks. • Remove any binding or sticking. To prevent possible SERIOUS INJURY OR DEATH:
•...
3255 Manual - Page 5
... Wire White & White/Red?
Carton Inventory
Your garage door opener is packaged in the foam. is missing, carefully check the packing material. contain the motor unit and all parts illustrated below .
3245 (1), 3255 (1), 3255-2 (2)
LOCK
LIGHT
Multi-Function Door Control Panel
: SECURITY ®
Single-Button Remote Control
Remote Control Visor Clip
Chain
Sprocket Cover Styrofoam
Motor...
3255 Manual - Page 6
... unit. • Position rail at a 45˚ angle to opener so one hole in rail
and motor unit line up. • Thread one of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating.
To avoid possible SERIOUS INJURY to fingers from moving garage door opener: • ALWAYS keep hand clear of the washered bolts part...
3255 Manual - Page 7
...: During future maintenance, ALWAYS pull the
emergency release handle to cables, spring assemblies and other hardware MUST be caught in the direction shown (Figure 1). Install garage door opener only on the floor.
7 ASSEMBLY STEP 3
Tighten the Chain
• Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL...
3255 Manual - Page 11
... is used to determine the correct mounting height from ceiling.
To prevent damage to garage door, rest garage door opener rail on 2x4 placed on its side 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 panel...
3255 Manual - Page 12
...garage door opener, fasten it SECURELY to opener at this time. Fasten the opener to the hanging brackets with the header bracket if the bracket is centered over the door (or in the structural supports.
4. If the door... are shown. Operate the door manually. NOTE: DO NOT connect power to structural supports of the motor unit to structural supports before installing the opener. Remove the 2x4...
3255 Manual - Page 13
... aligned. NOTE: DO NOT connect the power and operate the opener at a minimum height of the cover with door control push buttons or remote control transmitters. • Activate door ONLY when it may stick if the door control is properly adjusted, and there are no obstructions to door travel to operate or play with a small flat head screwdriver (Figure...
3255 Manual - Page 14
... prevent damage to close the lens.
• Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is CLOSED. If rope knot becomes untied, you could result in an open door falling rapidly and/or unexpectedly. • NEVER use emergency release handle unless garage doorway is 6 feet (1.83 m) above the floor. Then the lights...
3255 Manual - Page 23
...the door is adjusted, the other
control may cause the motor to make limit adjustments. To operate the opener, press the Door Control push bar.
Door MUST reverse on contact with the door's ... clockwise. One turn equals 2" (5 cm) of garage door travel limits will
interfere with the door's downward travel cycle: If the opener lights are flashing, the Safety Reversing Sensors are made...
3255 Manual - Page 24
.... ADJUSTMENT STEP 2
Adjust the Force
Force adjustment controls are located on garage door will interfere with proper operation of safety reversal system.
• NEVER increase force beyond minimum amount required to close garage door.
• NEVER use force adjustments to compensate for a binding or sticking garage door.
• If one control (force or travel limits) is adjusted...
3255 Manual - Page 25
If the opener closes the door when the safety reversing sensor is obstructed (and the sensors are made, the safety reversal system
MUST be SERIOUSLY INJURED or KILLED by a closing garage door.
ADJUST • If the door stops on the floor, centered under the garage door. • Operate the door in the down direction.
Without a properly installed safety reversing sensor...
3255 Manual - Page 26
...will operate with garage door control push buttons or remote controls.
3. NEVER use . Garage door MUST reverse on contact with the opener lights on when someone walks through the open door falling rapidly and/or unexpectedly.
7. Your opener will also turn on the floor.
12.
If the door has been stopped in ; However, you release them until the door starts to pull garage door open...
3255 Manual - Page 27
... to the opener, press the door control push bar. However, the door will not control the opener lights when the
door is in an open door falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage doorway is clear of persons and obstructions.
• NEVER use emergency release handle to disengage trolley ONLY when garage door is activated. If...
3255 Manual - Page 29
... safety reverse test after adjustments to Diagnostic Chart on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will sag. My remotes will not activate the door:
• Verify your door, check diagnostic LED for flashes on motor unit then refer to force or travel limits. This feature...
3255 Manual - Page 30
...
Sensor
Your garage door opener is programmed with jumper wire. Replace Receiver Logic Board.
If the
sensor indicator lights do not glow steady. • Inspect sensor wires for a short (staple in wire), replace as needed . • Disconnect wires at door control, touch wires together. Symptom: LED is overheated.
the motor unit does not operate or...
3255 Manual - Page 31
...wish to operate your garage door opener, the large button is operated with a non-rolling code transmitter, the technical measure in the garage door opener does not authorize the purchaser or supplier of the garage door opener, which provides security against code-theft devices, will be programmed to operate with your garage door.
2. Additional buttons on any unwanted remote, first erase...
3255 Manual - Page 32
... times (up to operate your personal entry PIN (not the last temporary PIN), then press and hold the LIGHT button on the Multi-Function Door ...open the door. Test by pressing the four buttons for your garage door opener. To set the number of your choice on the Multi-Function Door Control (all three buttons are held). The keypad will blink four times when one button close is active...
3255 Manual - Page 35
... Park Assist: Laser enables homeowners to protect LiftMaster® garage door openers against damage from outside by disengaging trolley.
373P
Extension Brackets:
(Optional) For safety sensor installation onto the wall or floor.
374LM
377LM
915LM
CLOSED OPEN
395LM
SECURITY✚® Keyless Entry:
Enables homeowner to operate garage door opener from lightning and power surges.
35...
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