1982 U.S. Elevator Hydro

Hello,

I have a problematic old U.S. Elevator. It was installed in 1982, serial number 15-136-19076. It is a 3 stop. I have some prints, but it appears to have a page or 2 missing. I can not find the landing system on any of the prints I have. Also this elevator is @ 500 miles from my office. Several months ago it was having a problem, if you give it a call to the mid or upper landing it will get stuck in a loop running top to bottom without opening the doors until it finally stops at the bottom. I cleaned all of the vane switches and adjusted the vanes, and tested all of the hoist way switches, that didn't help. Next I pulled every ice cube relay one by one to inspect the contacts and pins. I did find a couple pins that were bent and possibly not making good contact. After doing this I could not make it fail. It has ran with no problems for the last 6 or 8 months. A couple days ago the client called in with the same problem once again. I'm headed down there next Monday and just wanted to check in here to see if anyone has relevant prints and possibly dealt with this issue before. What I posted above is all the job specific info I have on hand. They have asked us to quote a modernization, but in the mean time they need to use it.
Thanks in advance
Joe

s relays and latch relays are the main culprits for this kind a problem. Watch the car run up and see if s relays pick in order. Latch relays pick and stay picked in up and drop on the way down. This is a typical ladder circuit and the relay prior the problem floor is usually the problem. PM me with a phone number or a e-mail and I will see what I can send you tomorrow. But a MOD really such a shame to tear out such good stuff. Haaaa

Dan is spot on with the selector circuit.
I would also check/replace relays in the stepping circuit such as; STU, STD, STO, STE and DZ. If your driving 500 miles to this job, I'd certainly take new relays to cover both circuits. R10 48VDC 4 pole latching and 4 and 6 pole standard relays are for U.S. equipment of the vintage you describe.

doc03363120150129071755

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Sorry guess that didnt work

Thanks for the help.
Dan, I just sent you a PM with my info. Maybe I can get her running tip-top so they won't need to mod it...
elmcannic, I'm actually flying down there. There are extra relays on-site so that shouldn't be an issue.

I'm on site. The problem is it will not stop at the 2nd floor (it will latch a 2nd floor call, but will continually run past) which is also the home park floor. It will run 1st to 3rd and 3rd to 1st with no problems. As soon as the doors close while it is at the 1st or 3rd floor, and there is no registered call, it tries to home park and gets stuck in a loop running top to bottom unable to find the 2nd floor (it doesn't slow down at the 2nd floor in either direction). I have swapped all of the relays related to the 2nd floor (2S, 2C, 2L) with no change. I also checked the vanes at the second floor.
All the relays appear to be working. The latching relays, the flip flop relays, the s relays and the c relays. STU, STD, STX are all functioning. Only thing I'm seeing is SST doesnt energize so CA can't drop out. it will occasionally stop at the 2nd floor, but it's probably less than 10% of the runs.

Dan was extremely helpful with this. I emailed him and he directed me to the H relay not dropping out to allow the slow down and told me to work back from there. I swapped out the INA(A) relay and my problems have gone away, the ones related to this elevator anyway
Apparently the normally closed contact was not opening when the relay was energized, at least not with any regularly.
Thanks again Dan!!

Ahhh...Very Good! Hope it's outta your hair for a while!

Good to go for another 30 years.Haaaaa