We are trying to install a garage door opener chamberlain 1/2 h.p. security+ three screws marked 1 2 and three is three the safety photo eyes do you know what the one two three is i figure 1 hot 2 neutral
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Your wires should be color coded blk/ white & solid white you will have a pair for each sensor twist the white wires together and twist your blk/wh wires together now on the back of the opener you should have three screws connect whites to the middle screw a(2) and your blk/white to the third screw (3) your sensors should light up now u should have a solid whte and red/whte connect red/whte to #(1)screw and white to #(2) your wall button should be lite
I think someone has used wiring that didn't come with the opener. One the rear of the motor unit are wiring terminals. The sensors connect to terminals 2 and 3. Whichever color wire is connected to terminal 2 goes to the screw marked white and the wire on terminal 3 goes to the screw marked black. This information is if you have a Craftsman or Chamberlain opener.
Double check to make sure the sensors are wired correctly. The 2 solid white wires go to terminal 2 and the wires with black stripes go to terminal 3. If the wiring is correct then you possibly have a bad RPM sensor. The RPM sensor is a small circuit board just in front of the motor.
First, check the safety eyes. There should be a light on each eye that is on. If not, realign the eyes. If that does not work, check the force settings. They are the blue adjustment screws. They should be set on 4-5. Do not go above 6 or there is a problem with either the door or opener, or both. If this does not work check all of the wiring on the back of the opener. 1 should be a red wire, 2 should be three white wires and 3 should be two black wires. Check the wiring to the wall button. the back of the button indicates red and white screws. To take off the wall button you will have to remove the big white button if you have the "deluxe wall control" If this does not fix it, respond with more info on door position and what happens with remotes and wall button.
You need to reset the limit settings. There are three white screws on the bottom of the opener with the cover off. You will need to take the bottom off the gear and sprocket assembly. Turn the middle screw to where the wings are most of the way up and move the trolley to the up position. Put the bottom of the gear and sprocket back on and adjust the two other screws ti make door open and close completely
The wall button gets the red and white wire. The safety eyes use the black and white wires. There are two types of attachments on the back of the openers. One has three screws. On this type the 1 is for the red wire, the 2 is for all white wires, and the 3 is for all black wires. The other type has four blocks and you just match the color to the wire color.