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Forums13
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Most Online117 Jan 16th, 2020
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#9184 - 12/12/13 05:24 AM
Re: oildraulic. ibm relay
[Re: jkh]
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Joined: Jan 2011
Posts: 119
sccjr
Shootintrouble
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Shootintrouble
Joined: Jan 2011
Posts: 119
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Sounds like your up terminal limit is not made or your OL contact is intermediatly acting up...car wants to drive up. Whats stopping it? Your LOT is a delay on timer that is started by an Up aux contact. I don't have a print in front of me but what in your circuit would prevent your starter from engaging or your car to run up the h/w at a reduced speed....Check your LOT timer by removing the OL wire or starter coil wire make sure it trips at the same time everytime usually around 90 secs. If you have any difference just once on your test change out timer. The components on those rc timers deteriorate all the time causing false fires, replace with an artisan timer. Also make sure your valve is sized right meaning its not bouncing on the bypass. When it comes to LOT or MLT it can be a nightmare to t/s but thats why you get paid the big bucks anybody can vacuum a cartop but theres a select few who can shoot the trouble. Good luck.
Last edited by sccjr; 12/12/13 05:27 AM.
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#9217 - 12/15/13 04:38 PM
Re: oildraulic. ibm relay
[Re: Johnny]
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Joined: Oct 2013
Posts: 113
chicago
member
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member
Joined: Oct 2013
Posts: 113
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Stupid question 2: The same call came in the other day. Elevator at lowest landing, several car calls fired, door open, and elevator would not leave first floor. Building Eng. pulled main line to get elevator running due to heavy traffic in apt. building. Maintenance person called me before he pulled line to reset, LOT timer board not on. I arrived hour later and went over first floor lock, pick ups and clutch clearance thru hoistway, check starter contacts, etc. History... 7 story Dover Oildraulic controller, IBM Relay logic(about 50 IBM relays), 4 timer boards, 24 years old equipment, Dover door operator(85?) with micro-switches, maintenance man tells me that he pulls main line every other day so he does have to waste my time. Thanks for any ideas.
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#9238 - 12/16/13 06:32 AM
Re: oildraulic. ibm relay
[Re: jkh]
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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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Chicago, did you check for a stuck button or relay on the lowest landing holding the doors open? Ask the maintenance man is the bottom landing button on in this situation.
Last edited by uppo72; 12/16/13 06:33 AM.
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