I just moved into a new place that didn’t have an opener for the outbuilding. I bought a couple of side mount chamberlain RJO70’s. I mounted it up on the left hand side if your inside the building. When I go to adjust it, the buttons are doing the opposite. Up button makes the door go down. When the door is at the up position the lock enables. Also when the obstruction sensor is triggered the door goes down instead of up. What am I doing wrong?
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Chamberlain side mount opener controls opposite
- Thread starter Drift_G35
- Start date
Viper98912
Well-known member
That is really strange, especially since there is not a positive or negative terminal on the line inputs for the sensors. There might be something wired incorrectly with the board in the unit, causing it to be reversed (which means you may need to unfortunately return it altogether).
Only other thing I can think of (which doesn't fully make sense either) is to check your 120V outlet and make sure it's not reversed (that the white and black wires are on the correct side). But I would assume this becomes irrelevant as the motor and electronics probably get reduced to DC voltage.
Only other thing I can think of (which doesn't fully make sense either) is to check your 120V outlet and make sure it's not reversed (that the white and black wires are on the correct side). But I would assume this becomes irrelevant as the motor and electronics probably get reduced to DC voltage.
I know it's been a few years, but did you ever resolve this without flipping direction the cables are wound on the drums? I'm having the same problem with a brand new Chamberlain side mount opener, where up and down are reversed relative to the rotation my cables/drums/springs are wound (mine are such that cable drops off drum on side away from the wall), but with the design of my install I'm not really able to wind them the other direction (cable dropping down close to wall instead of away from it). Trying Chamberlain support to see if there's a way to programmatically change the direction, but no luck yet...
They are designed to only work with "standard" wound drums and not "reversed" (looking from left end of shaft from inside, need to spin CCW to lift door), so the unit itself is not defective. I did find in the fine print eventually "not compatible with reverse wound drums" or something to that effect, but too late now that I've already bought and installed/wired it. I think my best options at this point are run it upside down (hopefully no mechanisms inside rely on gravity), or fab a gear set to reverse the direction. Saw another post on here where someone had this issue and tried to reverse polarity of the motor, which I was also considering, but they ran into issues with the RPM/position sensor that they couldn't overcome.I've installed probably a hundred of these units and never once ran into this issue. I would highly recommend asking for a complete reolacement. Definitely pretty bizarre what you are describing!