Super weird vibe as broken elevator almost looks like it's breathing or something, pulsing up and down acting erratically. Took the stairs. Reminds me of a David Cronenberg movie
This is definitely a brake fail, because the brake doesn't engage when it relevels. It was probably a technician who left the emergency brake in the control box the slightest loose.
what it is doing is trying to relevel, but the break is unable to hold the position (most likely oil on the breaks or need recalibrating) resulting in "slipping" from where the counter weight is heavier than the car then the logic is realising its no longer level and trying to relevel, it is more common in hydraulic system where a valve has warn out
Oh my GOD!! That's SOOO dangerous!! It's trying to relevel but can't because the brakes can't stop the car from drifting up (the normal direction because the counterweight is heavier than the car when it's empty). Either maintenance has been ignored here or some kind of weird catastrophic failure has happened to the brake coil. In any case, THIS type of malfunction is responsible for the very, very rare elevator death that almost never occurs...
It looks like the brake does work, as you can hear it engage as it stops. Most modern elevators use the VF drive to slow down. I think it's just a faulty controller.
This is maybe a hydraulic elevator which is low on oil and the piston sinks. The way it goes upwards rather than downwards makes me think it's a roped hydraulic elevator
Here is my explanation: The limit switch is not cooperating with the system, and thus disabling the brakes from engaging properly, and so then the motor thinks that the elevator is still leveling. It will continue this feedback loop until the loop is broken by resetting the elevator and servicing the limit switch, brake clutches, and the brake sensors. I know this because I am an elevator enthusiast taking mechanics classes, and I know my stuff.
Actually, you both are incorrect and correct. The limit switch is not cooperating with the system, and thus disabling the brakes from engaging properly, and so then the motor thinks that the elevator is still leveling. It will continue this feedback loop until the loop is broken by resetting the elevator and servicing the limit switch, brake clutches, and the brake sensors. I know this because I am an elevator enthusiast taking mechanics classes, and I know my stuff.
The bang was the brake, the lifts counterweight is heavier than the lift making it go up, then the governor noticed unauthorised movement and the motor made the lift re level and then the brake applied when there was a bang
Yea, I agree. My only reason why i even suggested that it could be computerized is because some modern elevators are computerized but have a bell instead of a buzzer
Actually, The limit switch is not cooperating with the system, and thus disabling the brakes from engaging properly, and so then the motor thinks that the elevator is still leveling. It will continue this feedback loop until the loop is broken by resetting the elevator and servicing the limit switch, brake clutches, and the brake sensors. I know this because I am an elevator enthusiast taking mechanics classes, and I know my stuff.
I don't think the break is working on that elevator and the counterweight must be at a similar position as the elevator. If that thing's not fixed soon the car is going to shoot into the roof. Don't step into it.
Elevators cannot shoot into the roof like the viral video of the man in the malfunctioning elevator. Why? Modern elevators have 2 governors: one prevents overspeed in the up direction, the other prevents overspeed in the down direction.
Actually, no. The limit switch is not cooperating with the system, and thus disabling the brakes from engaging properly, and so then the motor thinks that the elevator is still leveling. It will continue this feedback loop until the loop is broken by resetting the elevator and servicing the limit switch, brake clutches, and the brake sensors. I know this because I am an elevator enthusiast taking mechanics classes, and I know my stuff.
