I’m trying to install an LFM-20 with an Liftmaster 8165 (https://www.liftmaster.com/For-Homes/Garage-Door-Openers/LiftMaster-Series/model-8165), and this is what happened with the first LFM-20 unit I tested.
1 - First I did the wiring as described in the manual
2 - Plugged the LFM-20 to a power outlet outside the garage and paired it to my smarthings router
3 - I was able to control the unit from the application, and I could hear the “click” on it when switching it on and off
4 - I made sure it was configured as "Z-Wave Virtual Momentary Contact Switch"
5 - Connected the LFM-20 to the two wires the wall button was connected to, the two left contacts out of 4 the garage controller has
6 - Left the garage closed, and tried two switch on and off on the relay
7 - Garage Opener would not work, it was showing one blink up and three blinks down, which is the liftmaster code for:
Up Arrow Flash: 1
Down Arrow Flash: 3
Symptom: The door control will not function.
Solution: The wires for the door control are shorted or the door control is faulty. Inspect safety sensor wire at all staple points and connection points and replace wire or correct as needed.
8 - I left the LFM-20 for one day connected, and after that it stopped working, and would not connect again to the smarthings, the light on it was off all the time.
9 - The seller of the device sent me another one, looks like the first LFM-20 was defective. This time, I would like to know what could be wrong with my installation, or if it was the device.
Please find the pictures for the wiring I did here:
I connected the LFM-20 blue wires to the first and second contacts on the Liftmaster from left to right, they are the red and left white cables in the picture. The security sensors are connected to the white and black contacts
Any ideas? Anyone ever installed this relay with the Liftmaster I have? This is a brand new garage controller.
Thanks a lot!