JU MODE! - Faulty Thyssenkrupp Evolution Blue Lift @ Boyd Orr Building, University of Glasgow

This lift is one of a set of three Thyssenkrupp Evolution Blue lifts located at the Boyd Orr building at the University of Glasgow. All 3 lifts serve floors 2 - 11. I believe they travel at 1.6 m/s but it could be 2 m/s. They were installed in 2014.
The lifts are fairly nice. I like the blue buttons, although there is not much difference in colour when the button is pressed compared to when not pressed. The voice is ok on these lifts too.
The most interesting thing that happened in this video though is the JU mode! JU mode occurs when the lift loses its position within the shaft. The lift will then travel very slowly to the nearest floor where it will re find its position and then return to normal. The lift will normally enter JU mode when the safety circuit is broken whilst the lift is in motion, but in this case, that didn't happen. Of course it is possible that the lift broke its safety circuit by hitting something in the shaft but I don't think this happened. The lift entered JU mode in multiple separate points within the shaft which does not suggest that it was hitting something causing the safety circuit to brake. If it was hitting something in the shaft it would likely be in the same location each time, and it is unlikely that the lift is hitting something in multiple places in the shaft. Also, the lift appeared to enter JU mode before it even began to move which again does not suggest that the safety circuit was broken. Maybe there is a fault with this lift where it thinks the safety circuit is broken when it is not, or some other fault. What do you think is causing the lift to repeatedly enter JU mode? Leave your thoughts in the comments! (Also note that the lift entered JU mode a further 2 times off camera so it was a constant issue when I was there).
JU mode is an interesting feature. I may be wrong but I think only Thyssenkrupp lifts do this. Some lifts will not lose their position when safety is broken or they will very quickly re find their position without the need for slow speed JU mode. Some lifts will also shut down altogether so at least it was not one of those or I would have been stuck!

[@elevatorsinrussia2597]

I don’t think they are MRL hence the motors are not loud. Non-MRL models are either sonic or uniq but not Evolution Blue 2010 Thyssenkrupp Synergy's near me had the same problem when calling it outside, goes into JU mode then leaves without opening the doors

[@scavengersredemptaliation1503]

thats could be PCB (at COP) unit problem or communication cable (buss) trouble . my office had this trouble recently

[@codystanley2326]

1:54 Lift: Ah! Ah! did someone open the doors even i locked it? ok then let's put into JU mode man: ???

[@patrick7447]

I think it have some problems with the innen door safty contact

[@justinekenjirafols]

To safety break it you need to push the door from inside or outside

[@northernirishlifts]

Weird. At first I thought it must have something to do with it travelling between 11 and 10 but at the end it did it between 3 and 2. Very odd, but other than that the lifts are quite nice. Great video

[@kalifts]

Thanks! Yeah it certainly is weird! It would make more sense if it was just between 11 and 10 as then it could be explained by the lift hitting something in the shaft or just a problem with the way it identifies its position in the shaft there. When it did it between 3 and 2 that added confusion as I am not sure exactly why it is happening now! Yeah these lifts are nice I agree! The other lifts didn't have this fault and I imagine someone will sort it out when they next inspect the lift.

[@liftsurfer52]

What does JU mean?

[@kalifts]

It stands for Adjustment I think. I don't know why they have chosen the JU letters from the word adjustment instead of the AD. So when the lift loses its position in the shaft and does not know which floor it is on or which floors it is between, it will enter JU mode where the lift will travel very slowly for safety reasons until it has re found its position and then it will return to normal.

[@ZZ9ProductionsOFFICIAL]

@@kalifts i believe its actually the german term Justierfahrt which translates in google translate to Adjustment Run. basically refinding position

[@kalifts]

@@ZZ9ProductionsOFFICIAL Thanks for the information! Very interesting!!!

[@Mr_ButterKatze]

@@ZZ9ProductionsOFFICIALYou are right.

[@ChristopherKaneTV]

This lift has now been taken out of service

[@kalifts]

Ahh that's interesting! Hopefully they fix it soon!

[@Mr_ButterKatze]

This is why i am afraid to drive a Thyssenkrupp.