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Forums13
Topics6,528
Posts36,942
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Most Online117 Jan 16th, 2020
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#10474 - 04/24/14 06:42 PM
otis 21 ucls controller
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Joined: Dec 2010
Posts: 11
none
lift mechanic
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lift mechanic
Joined: Dec 2010
Posts: 11
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elevator wont run down on insp. but will run up any help
hunt 1
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#10475 - 04/24/14 09:19 PM
Re: otis 21 ucls controller
[Re: none]
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Joined: May 2011
Posts: 487
E-man
addict
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addict
Joined: May 2011
Posts: 487
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I would start troubleshooting in the Down circuit.
Last edited by E-man; 04/24/14 09:19 PM.
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#10481 - 04/25/14 12:33 PM
Re: otis 21 ucls controller
[Re: uppo72]
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Joined: Dec 2010
Posts: 11
none
lift mechanic
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lift mechanic
Joined: Dec 2010
Posts: 11
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elevator does run down on automatic but a little slow on leveling H , D , and DM all pull in and the same from car top insp. and machine room insp.
hunt 1
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#10496 - 04/26/14 03:27 PM
Re: otis 21 ucls controller
[Re: jkh]
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Joined: May 2011
Posts: 487
E-man
addict
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addict
Joined: May 2011
Posts: 487
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None, are you certified elevator mechanic? If you are and you have prints, coming on this forum for help with a car that will run on inspect one way but not the other is kinda making me wonder...
Last edited by E-man; 04/26/14 03:27 PM.
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#10506 - 04/28/14 01:56 PM
Re: otis 21 ucls controller
[Re: Vatorgator]
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Joined: Dec 2010
Posts: 11
none
lift mechanic
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lift mechanic
Joined: Dec 2010
Posts: 11
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Yes everything is coming in for it to run down on insp. thanks i will check more into the generator field circuit
hunt 1
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#10516 - 04/29/14 01:49 PM
Re: otis 21 ucls controller
[Re: Vatorgator]
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Joined: Aug 2011
Posts: 563
uppo72
addict
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addict
Joined: Aug 2011
Posts: 563
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i would suspect a compounding problem, make sure your SF relay is working correctly. if you are getting the same voltage across the generator leveling field in the up and down direction, then you will need to adjust the bedspring for more series field, or adjust the taps in the generator. It certainly could be compounding. Does this happen at high and low points in the shaft indicating a counterweight issue? I would as you say test your levelling field volts first.
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#10564 - 05/05/14 01:39 PM
Re: otis 21 ucls controller
[Re: swift5000expert]
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Joined: Aug 2011
Posts: 563
uppo72
addict
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addict
Joined: Aug 2011
Posts: 563
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The best lesson I ever learnt was when fault finding, particularly in the relay logic age, was the best tool to fix lifts was your eyes. Understand your lifts, understand the general sequence of operation with the relays, and you will fix(or at least know where the problem is) most things within the first 5 minutes. This applies here, as if there is a generator problem you will see it when watching the lift motor run. You will even pick up the sound of an error from the other side of the room.
Last edited by uppo72; 05/05/14 01:40 PM.
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