Controller board went out on a MRL in Tucson last Thursday

I was working on a machine-room-less in a 4-story office building near downtown Tucson. Everything was running fine on the morning test, then around 11am the car just stopped between floors with no warning. Had to do a manual lowering to get two people out, which took about 45 minutes because the brake release was stuck. Got the controller board opened up and saw a burnt spot near the main relay connection. I ended up swapping in a temporary bypass just to get the car running for the rest of the day, then ordered a replacement board from the supplier. They said it would be 3 weeks out which is ridiculous for a 2019 model. Has anyone else had issues with these newer MRL controller boards failing like this? I'm wondering if it's a heat problem in the cabinet since it gets over 100 in that shaft.

3 comments

3 Comments

angela431mo ago

Did you get a sunburn just from looking at that burnt relay connection? I once had a board fry so bad it looked like a lizard was trying to crawl out of the cabinet. That 3 week wait time sounds brutal when you're stuck in a hot shaft with a dead car.

holly_green821mo ago

Did you see that video going around about the guy who rigged up a fan from a computer power supply just to keep his board cool? Sounds crazy but desperate times I guess. That 3 week wait with no elevator in a hot shaft is a nightmare, wouldn't wish that on anyone.

andrew77825d ago

Man, 3 weeks for a board on a 2019 model is wild. Did you check if the cabinet has any kind of vent or if it's just sealed up tight? I've been wondering if these newer cabinets just bake the boards in the summer. It wouldn't hurt to see if there's a temp sensor in the shaft that's way off, could be reading cool but the board is sitting in a hot spot.