Mitsubishi puts chains on all their newer lifts since they only recently started to care about ride quality, lots of 70s and 80s Mitsubishis going the same height have nothing to compensate underneath
I actually have nice Mitsubishi MRLs in my apartment, but they have a special room with some logical buttons, some of them can actually shut down the lift electrical circuit! I wish to open it and see what is inside of it
The logic cabinet seems very compact. I don't really like that the main power switch is in the shaft on a relay that the small keyswitch activates. I prefer having physical access to the main switch and I prefer a physical brake release. I actually had to return to this like to make this video, as on the first attempt the battery for brake release had gone flat and the lift couldn't be freefalled. Also, this logic has no way of accessing the settings unless you have proprietary Mitsubishi gadget. But apart from these things, I really like this lift as it is much better built than all other MRL lifts (except maybe Kone MX20).
I agree, seems like they used electronics in places where it would have been easier and more efficient to just have a mechanical system. More complexity can lead to more failures, like the brake release issue that you described. Had it been a mechanical brake release, there would be no battery issue. Also it looks like Mitsubishi is trying to prevent 3rd party repairs/maintenance by requiring the specific Mitsubishi gadget to access the logic settings. I think Otis does that as well. Also not sure why they would have the main power switch (which is awkwardly placed in the shaft) be activated by a small keyswitch in a different location, seems like more steps. Maybe they only want lift engineers turning off the lift.
Do you know if the VF drive short circuits the motor windings on freefall? The ZAdyn for example does this on synchronous motors (the gearless ones). Since the motor acts as a generator in freeefall, shorted windings will create very high breaking currents, protecting the lift from getting too fast very quickly. I'm asking because I realized that the lift is falling very slowly.
I hadn't thought of that. That method would allow the motor to start moving without resistance but would stop the motor getting too fast. But surely this goes against all the rules of slowing motors. Short circuiting motors makes large amounts of currents and all the power would be dissipated in the motor windings as there is no resistors to dissipate it.
@@benolifts I just rechecked the ZAdyn manual and it really does exist. They say it also works if there is no power input to the ZAdyn and it is only meant gor synchronous motors. It works with all Ziehl-Abegg SMs, if you want to use another motor you should check with the manufacturer if this is allowed or not. But in the end: Yes, al the braking energy is dissipated as heat in the motor. Still since this is only relevant for evacuation it will not be used over long periods of time and the speed will be low. So I guess it isn't a problem.
@@benolifts freefalling a lift, people think you literally let a lift free fall but its a different meaning so people click on the video, so yes, clickbait.
@@benolifts no, freefalling a lift means something different, it isn't what people think, it doesn't drop down, so it is clickbait and you know it too 🤣
The most common cause of lift failure where people are in danger is the motor brake failing. The lift will shoot up and build up speed very quickly. Dual mode Dual direction governors were only made mandatory very recently. Everyone knew for years that far more accidents occur of lifts falling up rather than down yet for a century governors were down only. This is a classic example of regulators being obsessed with their dumb unknowledgeable fears (cables snapping) rather than knowing the facts of how most accidents happen (brake failure).
![[English] ΣAI-2200C Group Control Technology for Elevator [Mitsubishi Official Video]](http://i.ytimg.com/vi/dXm3RgdIpEk/mqdefault.jpg)
That placement of the logic is extremely clever. Would have never thought to put the logics inside a call button
İmagine being a lift enginner and never see a Mitsubishi logic cabknet and searching it for hours and never knowing İTS back of the call block
That Mistsubishi chime really does it for me.
Mitsubishi puts chains on all their newer lifts since they only recently started to care about ride quality, lots of 70s and 80s Mitsubishis going the same height have nothing to compensate underneath
If you do Flight Adventure in Japan, take note that the amount of Mitsubishis may surpass the Gen2/2000s, as well as any EcoDiscs
I actually have nice Mitsubishi MRLs in my apartment, but they have a special room with some logical buttons, some of them can actually shut down the lift electrical circuit!
I wish to open it and see what is inside of it
Mitsubishis have their quirks! That logic interface is very well designed.
The logic cabinet seems very compact. I don't really like that the main power switch is in the shaft on a relay that the small keyswitch activates. I prefer having physical access to the main switch and I prefer a physical brake release. I actually had to return to this like to make this video, as on the first attempt the battery for brake release had gone flat and the lift couldn't be freefalled. Also, this logic has no way of accessing the settings unless you have proprietary Mitsubishi gadget. But apart from these things, I really like this lift as it is much better built than all other MRL lifts (except maybe Kone MX20).
I agree, seems like they used electronics in places where it would have been easier and more efficient to just have a mechanical system. More complexity can lead to more failures, like the brake release issue that you described. Had it been a mechanical brake release, there would be no battery issue.
Also it looks like Mitsubishi is trying to prevent 3rd party repairs/maintenance by requiring the specific Mitsubishi gadget to access the logic settings. I think Otis does that as well. Also not sure why they would have the main power switch (which is awkwardly placed in the shaft) be activated by a small keyswitch in a different location, seems like more steps. Maybe they only want lift engineers turning off the lift.
Lol at the burp @ 1:53 😛
I love Mitsubishi elevators. Very consistent with US, UK, Asia etc as well n
Fujitec puts chains on their lifts too, but it's underslung attached to the bottom of the car
Mitsubishi chime is amazing!
Do you know if the VF drive short circuits the motor windings on freefall? The ZAdyn for example does this on synchronous motors (the gearless ones). Since the motor acts as a generator in freeefall, shorted windings will create very high breaking currents, protecting the lift from getting too fast very quickly.
I'm asking because I realized that the lift is falling very slowly.
I hadn't thought of that. That method would allow the motor to start moving without resistance but would stop the motor getting too fast. But surely this goes against all the rules of slowing motors. Short circuiting motors makes large amounts of currents and all the power would be dissipated in the motor windings as there is no resistors to dissipate it.
@@benolifts I just rechecked the ZAdyn manual and it really does exist. They say it also works if there is no power input to the ZAdyn and it is only meant gor synchronous motors. It works with all Ziehl-Abegg SMs, if you want to use another motor you should check with the manufacturer if this is allowed or not.
But in the end: Yes, al the braking energy is dissipated as heat in the motor. Still since this is only relevant for evacuation it will not be used over long periods of time and the speed will be low. So I guess it isn't a problem.
1:54 my tasty burp. 😂
Please make a Detailed look on a ThyssenKrupp Evolution Blue or Kone LCE
2:33 Hello mitsubishi
ben, the button.... is it locked or is there a secret way of unlocking? cheers
The logic cabinet? It is locked just like on any other MRL.
Let’s free fall a Mitsubishi!
1:53 BURP
Ngl that clickbait was well placed.
Clickbait?
@@benolifts freefalling a lift, people think you literally let a lift free fall but its a different meaning so people click on the video, so yes, clickbait.
@@-never-gonna-give-you-up- I did literally let the lift freefall. The video does shows exactly what is in the title.
@@benolifts no, freefalling a lift means something different, it isn't what people think, it doesn't drop down, so it is clickbait and you know it too 🤣
Freefalling means something moves entirely by gravity, which is what is happening.
I was a bit disappointed that the lift didn't just crash all the way down but obviously this cant really happen...
Hi ben
Hi Alan
Wow, never knew you would reply! Awsome
Very interesting
I thought that Mitsubishi only made cars including the Evo Lancers. Didn’t know that they made lifts.
Its not the same Mitsubishi. They have the same logo, which implies the company split into multiple companies.
@@benolifts Ah right. Thanks for pointing that out.
@@Andrewjg_89 they also make industrial robots, sps's acs and more!
@@SimonBauer7 Nice. Thanks 👍
FIRST YAY
I wanna kill someone with an ARRRIIIVVAAAAAA!!!
We are missing a lot of stuff, oh yeah! Stagecoach
I wanna find Abellio crying to RATP dev!
We are still missing someone. Come on Tower Transit! Don’t be shy!
And CAPS LOCK is now a MEME.
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it went up instead of down.
Because the counter weight is heavier than the empty lift car
Lifts go up when they freefall.
I don’t exactly know how that’s “freefalling”
Watch some more videos in this playlist to understand more about lifts
th-cam.com/play/PLrcpmBjkjNUGEQcY1n2Copz17-fjYcj8A.html
Lifts fall ‘up’
When the ropes slip on the sheave up they go ⬆️, if all of the many ropes snap, down she goes till the rail brakes grab 🤞
The most common cause of lift failure where people are in danger is the motor brake failing. The lift will shoot up and build up speed very quickly. Dual mode Dual direction governors were only made mandatory very recently. Everyone knew for years that far more accidents occur of lifts falling up rather than down yet for a century governors were down only. This is a classic example of regulators being obsessed with their dumb unknowledgeable fears (cables snapping) rather than knowing the facts of how most accidents happen (brake failure).
Chinese written instructions. Shanghai Mitsubishi.
Shanghai Mitsubishi is the generic version of Mitsubishi
15TH
hey austin this is guys
hey guys this is Mitsubishi lift.
hey guys this is austin