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#27314 - 07/02/19 07:35 PM Otis 311: DC link UV  
Joined: Aug 2016
Posts: 35
RustyIron Offline
newbie
RustyIron  Offline
newbie

Joined: Aug 2016
Posts: 35
Socal
Hey, guys.
I have a 311 that runs fine on INS, but on NOR, it begins to accelerate and then dies after a few inches. Indications are a "DC link UV." Bus voltage looks fine. I've read there's a parameter at 4-3-1-7 that will allow me to change the threshold, but I can't see it. I can go 4-3-1, and then step through a variety of options. None of those options, however, allow me to change the threshold for low bus voltage. Thoughts?

#27318 - 07/03/19 12:27 AM Re: Otis 311: DC link UV [Re: RustyIron]  
Joined: Dec 2015
Posts: 1,529
Indirtwetrust Online content
ElevatorPractitioner
Indirtwetrust  Online Content
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,529
Local 18
I think you have to hit Shift - 7 - Shift - Enter to get to those parameters

Last edited by Indirtwetrust; 07/03/19 12:28 AM.
#27319 - 07/03/19 12:41 AM Re: Otis 311: DC link UV [Re: RustyIron]  
Joined: Aug 2016
Posts: 35
RustyIron Offline
newbie
RustyIron  Offline
newbie

Joined: Aug 2016
Posts: 35
Socal
THANK YOU!
Now that you mention it, I remember having to travel some hidden secret path in the past. My plan for tomorrow involves swapping the lower control board with another drive, but checking the voltage threshold sounds like a better place to start. Have a good evening.

#27360 - 07/09/19 07:40 PM Re: Otis 311: DC link UV [Re: RustyIron]  
Joined: Aug 2016
Posts: 35
RustyIron Offline
newbie
RustyIron  Offline
newbie

Joined: Aug 2016
Posts: 35
Socal
Thanks again for the reminder how to get to the super-secret parameter codes. The problem is now resolved. The problem was actually with the DC bus filter on the drive. All was well at slow speeds, but when the current started ramping up, I suspect there was a little too much ripple, and voltage monitoring circuit got really sad really quick.


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