LiftMaster 8550 Support Question
LiftMaster 8550 Support Question
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Question posted by mjmck12 on March 17th, 2022
Era Coad 11
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Answer #1: Posted by SonuKumar on March 18th, 2022 9:59 AM
SonuKumar
Member since:
May 9th, 2021 Points: 16,621,300
Member since:
May 9th, 2021 Points: 16,621,300
If you constantly hold the button down it will close. However, the sensor circuit for closing the door is either unconnected (check the connection of the two wires going to the sending/receiving units on bottom of garage door for proper connection and aiming) or the circuit itself has gone south.
https://www.fixya.com/support/t25551897-our_garage_door_will_not_close_say
https://www.justanswer.com/home-improvement/8pl7o-error-code-11-lift-master-panel-garage.html
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
Your search handyman for all e-support needs!!
Related LiftMaster 8550 Manual Pages
8550 Manual - Page 1
... are required to ensure safe operation. ■ The model number label is located on the left side panel of your garage door opener. ■ This garage door opener is ONLY compatible with sectional doors.
Belt Drive Garage Door Opener Model 8550
FOR RESIDENTIAL USE ONLY
Write down the following information for installation instructions.
. www.liftmaster.com The Chamberlain Group, Inc.
845...
8550 Manual - Page 2
....
• Disable ALL locks and remove ALL ropes connected to garage door BEFORE installation and operating garage door opener to avoid entanglement.
5/32 3/16
5/16
12
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating the opener.
• ONLY operate garage door opener at 120 V, 60 Hz to avoid malfunction and damage.
1/2
5/8
1/4
7/16...
8550 Manual - Page 3
... the accessory and are not included in this manuals are for these accessories will vary depending on your specific model, other accessories may look different. GARAGE DOOR OPENER ASSEMBLY
A. Sprocket cover and screws K. White and red/white wire
The Protector System®
N. Safety reversing sensors
with the sprocket cover] Installation H2 Hex Bolt...
8550 Manual - Page 4
... rail with the sprocket cover)
4 HARDWARE
Mounted in the top of sprocket while
garage door opener. from moving garage door opener:
1.1 Remove the two bolts from the rail, belt,
operating. Assembly
1 Attach the rail to the garage door opener
NOTE: ONLY use ONLY those bolts/fasteners mounted in the garage door opener
H1 (3)
Hex Screw #8x3/8" (Packed with the previously removed
bolts...
8550 Manual - Page 6
...; within reach, but at least 6 feet (1.83 m) above floor. 6. DO NOT enable the Timer-to garage door control 11. Install garage door opener only on a one -piece or swinging
garage doors. They could result in SEVERE
INJURY or DEATH. 3. An
improperly balanced door may not reverse when required and could
be caught in plain view on wall next to...
8550 Manual - Page 7
... track
7 To be used if mounting header bracket or 2x4 into masonry.
• NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which are installing the garage door opener on wall or ceiling), use lag screws (not provided) to securely fasten the 2x4 to structural supports...
8550 Manual - Page 9
... the clevis pin (H5) through the holes in the header bracket and rail. 3 Attach the rail to garage door, rest garage door opener rail on 2x4 placed on top section of door.
4.1 Remove the packing material and lift the
garage door opener onto a ladder.
NOTE: Use the packing material as a protective base for setting the distance between the rail...
8550 Manual - Page 10
...) to attach a support bracket (not provided) to the structural supports before installing the garage door opener.
5.2 Make sure the garage door opener is
aligned with the bolts (H2), lock
door. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports. If the door hits the rail, raise the
hardware (not provided). header bracket.
(not provided)
H2...
8550 Manual - Page 13
... the
far apart as possible) and attach using the bolts
trolley release arm is activated.
. trolley will re-engage automatically when the garage door opener is horizontal. H11
H6
HARDWARE H2 (2)
Hex Bolt 5/16"-18x7/8"
H8 (2)
Nut
5/16"-18
H7
Clevis Pin
5/16"x1"
H11 (2)
Ring Fastener
H9 (2)
Lock
Washer 5/...
8550 Manual - Page 14
... wires
H16 GANG BOX
are used so the correct wires are no obstructions to door travel.
on the back of insulation from the wall.
NOTE: Your product may look different than moving parts of the door at the garage door opener in a later step. HARDWARE
H14 (2)
Screw 6ABx1-1/4"
H15 (2)
Screw 6-32x1"
H16 (2)
Drywall Anchors
NOTE...
8550 Manual - Page 15
... ceiling with the staples (H17) (not applicable for the top screw.
1.8 Position the bottom hole of the wire near the garage door opener.
7/16" (11 mm)
H15
GANG BOX
2.3 Connect the wire to
the garage door opener. Do not pierce the wire with screwdriver tip. To insert or release wires from the terminal, push in the tab...
8550 Manual - Page 17
... aligned correctly before the garage door opener will flash 10 times. To prevent SERIOUS INJURY or DEATH from closing , the door will stop and reverse to the full open position, and the garage door opener lights will move in the down until the garage door opener has completed 5 cycles upon power up. NOTE: For energy efficiency the garage door opener will enter sleep mode...
8550 Manual - Page 19
To insert or remove the wires from each set of wires. HARDWARE
H17
H17 (10)
Insulated Staple
7/16" (11 mm)
2.3A Insert the white wires into the white terminal on the garage door opener.
RED WHITE WHITE GREY
19 Twist the white wires together. Insert the white/black wires into the
slot on both sensors...
8550 Manual - Page 20
... tip.
20 Not Provided
White
Yellow (for example)
White/Black Safety reversing sensor wires
Purple (for example)
Pre-installed wires
2.4B At the garage door opener, strip 7/16 inch (11 mm) of insulation from each end of the wires previously chosen for each end. Install the Protector System®
OPTION B PRE-WIRED INSTALLATION
2.1B...
8550 Manual - Page 21
... power cord from electrocution or fire: • Be sure power is grounded. To make it fit outlet. To avoid installation difficulties, do not activate the garage door opener at this time. This plug will only fit into your outlet, contact a qualified electrician to install the proper outlet.
Attach the ground wire to the...
8550 Manual - Page 22
...correctly: white wires to white terminal and white/black wires to the garage door opener.
RED WHITE WHITE GREY
3 Ensure the Door Control is not shorted/broken. wired correctly.
The sensors can be...THE SENDING SENSOR IS NOT GLOWING:
Make sure there is closing, the door will reverse and the garage door opener lights will flash ten times.
The LEDs in both sensors are glowing ...
8550 Manual - Page 23
... the travel and cannot be changed.
The force is designed with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on floor. Door MUST reverse on the left side panel of the garage door opener and are made, the safety reversal system MUST be tested.
PROGRAMMING BUTTONS
The programming buttons are located on contact with electronic...
8550 Manual - Page 28
... operate or play with 1-1/2" high (3.8 cm) object (or a 2x4 laid flat) on contact with garage door control push buttons or remote controls.
3. NEVER use handle to door travel.
4. Garage door MUST reverse on the floor.
11. DO NOT enable the Timer-to garage door opener BEFORE making ANY repairs or removing covers.
14. ALWAYS keep remote controls out of...
8550 Manual - Page 37
... Sensor Kit
41A5034
8
Receiving and sending
sensors with 3 feet (.9 m) 2-conductor wire
10 11
8 Straight Door Arm
178B34
9 White and Red/White Wire
41C5141-1
10 3V2016 Lithium Battery
10A19
11 Battery Backup
485LM
Contact Information
Address repair parts order to your garage door opener while calling. If you
are calling about a Troubleshooting issue, it is recommended that...
8550 Manual - Page 38
Repair Parts
Garage Door Opener Parts
11
9
4 3
1
12
5
2 10
4
3
7 8
6
38
DESCRIPTION 1 Sprocket and Sprocket Cover
with Screws 2 End Panel with labels, battery
cover and light socket 3 Light Lens 4 Light Socket 5 Transformer 6 Cover 7 Motor and Travel Module 8 Travel Module 9 End Panel with all labels and
light socket 10 Receiver Logic Board 11 Line Cord 12 Filter Board...
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