Trane 50 ton voyager

[tempco]

Worked on a trane 50 ton with gas heat, call was couldn't get inside temp over 64F, found the economizer had shut off return to building and pulling straight out side air.

Check volts to econo motor, none to motor I put the unit in test mode and it reset and went to working, does anyone have any idea why it would have done this. Coundn't find anything else wrong.

[rasmussen6880]

could be an intermitnt problem with the circut bord that feeds to that moter. this summer i had a simmler problem, it wouldnt close on a call for the compresors to come on, drawing 100% outside air at the heat of the day. i would reset and it would work normal for 3-4 days. changed the bord and it has worked fine.

[rob10]

For glitches. Any anomoly that happens more than once demands a new board.

[tempco]

Thats what I was thinking I guess I need to go by and check it again, have not heard from them since the last call, Its a Catholic Church so its not used that much, just wanted to see if anyone had the same problem and what you did for it.

[cem-bsee]

may get more ans in commercial forum

[sparks]

I have seen that a lot especially after it rains.

I have one site that is running EMS, just about every time it rains I get a call the next day, one of the units economizer module takes a crap and stops reading the sensors. Get up there the next day and spend couple hours testing comm and sensors all is good. Reset and all is well. There are 10 total units and I think it's happened to each one. The rest of the time they run flawlessly.

Trane does have a service bulletin on it.

Strange but true, its probably just moisture.

[tempco]

Went by and checked today its setting off inside and the econ. is 80% outside 20% inside and we haven't had any rain for about three weeks or more.

[shelby]

what type of controls UCP or reliatel?, model # as well?

[tech cr]

Just something else to watch for on some of those units. As your looking at the control panel, on the top left side is the metal that is part of the supply duct of the unit. At the top of that panel, is where it touches the roof of the unit. there is a little bit of insulation there,but warm air goes through there and freezes on the inside top portion of the control panel,because now that the outside of the unit. First warm weather you get or the suns comes out, it thaws out and drips on the circuit boards. You may have to read this a couple of times to understand it. I did..haha I wish I could draw a picture..

[Edited by tech cr on 01-02-2006 at 09:19 PM]

[sparks]

Did you check the sensors??

The eco test mode just mods the dampers open and closed and checks com between the uem and damper drive. It does not matter if a sensor fails or not it will still mod open regardless. The only way to check the sensors is with dcv or res chart.

Also, what kind of stat are you running?? ZSM, cti with conventional, or ems??

[floodedstart]

I have a service bullitin from Trane which talks about misc. problems they have with these units:

The purpose of this bulletin is to update several issues associated with the ReliaTel control modules. Unit models affected are 3 through 25 ton, TSC, THC, YSC, YHC, WSC, YCD, YCH, TCD, TCH, WCD and WCH.
Units affected by this bulletin are serial numbers starting with 301 through 525 for 3 through 10 ton products; and serial numbers starting with 317 through 525 for 12 ½ through 25 ton products


Let me know if you want me to e-mail it to you. I was able to get new economizer modules for no charge even after these units were out of warranty.

[sparks]

Originally posted by floodedstart
I have a service bullitin from Trane which talks about misc. problems they have with these units:

The purpose of this bulletin is to update several issues associated with the ReliaTel control modules. Unit models affected are 3 through 25 ton, TSC, THC, YSC, YHC, WSC, YCD, YCH, TCD, TCH, WCD and WCH.
Units affected by this bulletin are serial numbers starting with 301 through 525 for 3 through 10 ton products; and serial numbers starting with 317 through 525 for 12 ½ through 25 ton products


Let me know if you want me to e-mail it to you. I was able to get new economizer modules for no charge even after these units were out of warranty.

Could you e-mail me that , most of the problem child ones i have are voyagers out of warranty. I didn't realize the relialtels had a bulletin for economisers as well. E-mail is in the credentials section.

Thanks

[floodedstart]

You have mail sparks.

[tech cr]

Originally posted by floodedstart
I have a service bullitin from Trane which talks about misc. problems they have with these units:

The purpose of this bulletin is to update several issues associated with the ReliaTel control modules. Unit models affected are 3 through 25 ton, TSC, THC, YSC, YHC, WSC, YCD, YCH, TCD, TCH, WCD and WCH.
Units affected by this bulletin are serial numbers starting with 301 through 525 for 3 through 10 ton products; and serial numbers starting with 317 through 525 for 12 ½ through 25 ton products


Let me know if you want me to e-mail it to you. I was able to get new economizer modules for no charge even after these units were out of warranty. Could you email that info to me? Thanks. endo250cc
at
yahoo
dot
com
http://WWW.clicksmilies.Com/s0105/sauer/angry-smiley-014.gifForum Rules (http://hvac-talk.com/vbb/showthread.php?threadid=1241)
Please but your email in your credentials.

[Edited by Mod2 on 01-11-2006 at 08:14 PM]

[floodedstart]

You have mail tech

[tech cr]

Thanks..It's gonna take a while to read all that.lol

[tempco]

I don't have the model # in front of me or the serial but I can get it tomorrow, I haven't checked the sensor's, and we don't have a winter here, we are at 80f to day maybe 58 friday if we're lucky, seldom ever freezes here. This unit has a conventional t-stat interface, I installed a american standard vision pro stat last year on this unit. I had a zebra stat hooked outside to bypass main stat, the econo stayed the same while running heat, once put in test mode the econo moved ito proper position, also right after hurricane rita the main under ground transformer blew when they restored power, power company fixed and unit would not run, jumped terminalboard and got nothing, put in test mode and the unit started running fine after that, hadn't had a problem until the econo started acting up.

[tiago007]

hey floodedstart can i get a copy choplikewhoa
at
gmail
dot
com
thanks
Forum Rules (http://hvac-talk.com/vbb/showthread.php?threadid=1241)http://WWW.clicksmilies.Com/s0105/sauer/angry-smiley-014.gif
Please put your email in your credentials

[Edited by Mod2 on 01-11-2006 at 08:14 PM]

[moose3702]

Check the ENTHALPY controller. Make sure it is set correctly it will go into economizer mode if the OAT is under 55 degrees.

[floodedstart]

tiago007

You have mail.

[tempco]

Thanks will go by and check it.

[cerwin]

Hey floodedstart can I get a copy emailed. Thanks
cerwinXXXXentek-incXXXXcom

>>>edit... please put e-mail in profile, see this link (http://www.hvac-talk.com/vbb/showthread.php?threadid=94606) for further details.

http://www.my-smileys.de/smileys2/033102sor_1_prv.gif (No e-mails in posts, due to site rules (http://www.hvac-talk.com/vbb/showthread.php?threadid=1241) )


[Edited by Mod01 on 02-15-2006 at 08:58 PM]

[hvacgirl1488]

Originally posted by floodedstart
I have a service bullitin from Trane which talks about misc. problems they have with these units:

The purpose of this bulletin is to update several issues associated with the ReliaTel control modules. Unit models affected are 3 through 25 ton, TSC, THC, YSC, YHC, WSC, YCD, YCH, TCD, TCH, WCD and WCH.
Units affected by this bulletin are serial numbers starting with 301 through 525 for 3 through 10 ton products; and serial numbers starting with 317 through 525 for 12 ½ through 25 ton products


Let me know if you want me to e-mail it to you. I was able to get new economizer modules for no charge even after these units were out of warranty.

Please keep in mind the original post references a 50 ton voyager. The bulletin you are referencing is for 3-25 ton voyagers and precedents that are using reliatel.

[tempco]

Ok here is what I found after it did it again, M# YCH600AELG2A2JC1A00000GHJ0000, S# C01B42258. Unit has carbon dioxide sensor in building, home made relay and wiring installed in unit at ecconomizer, co2 trips, relay closes and drive opens outside air and closes the return to the building, sensor resets dampers stay the same because the control guy never wired it to return, just drive one way, the UCP thinks the dampers are the same as when it left them so it doesn't change anything, but it still doesn't explain why dampers don't return to min set point when t-stat satisfied.

Now in cooling mode they do work after co2 trips and resets trying to maintain a 50 to 55 supply temp. He has the relay wired into the CW & CCW wires to eccono motor, but CW is the only one that gets power.

Is there a TRANE co2 sensor kit that I can get that will solve this without wiring in another relay and limit switch to stop the dampers when co2 resets to normal. Have checked the UCP and UEM boards with the Voyager Microprocessor book, nothing wrong, this unit does not have the retun air sensor or humidity sensor, does not use enthalpy to modulate dampers, wasn't ordered with them. Has CTI board for t-stat with a vision pro stat.

[hvacgirl1488]

TEMPCO, please see my profile. Send me your email address. I have some info for you. THANKS

[hvacgirl1488]

TEMPCO, You have mail.

[tempco]

Ok Trane has shut the door on anything else I can do, they want to come out for a service call, hate to see what they charge for a 200 mile round trip. I have found a Model RES-1 Universal Resistance Transducer from kele.com that I can connect to the remote minimum position pot on the UEM board. Have seen refrence of cutting a resistor on the UEM, does anybody know if the remote pot terminals on the UEM require a resistor to be cut, the remote pot termials are labeled j11 and j12. I had to contact Trane modifications since this will have to be a mod, but they don't want to offer any help just send out serviceman. any help or suggestions would be greatly appreciated.

[hvacgirl1488]

The email didn't help?

[tempco]

Couldn't get any help from lacross parts, looked up sensor but on the other parts couldn't get anywhere. A nice lady sent me another case # which had this other relay listed. I have been around and around being transfered to different people until it ended with service having to come out. I appreciate the email, it got me started once I got someone on the phone that was willing to help, without you I would never have gotten to this point. So thank you very much. By the way this circuit board will work without having to purchase anything else, will have to cut the WL resistor on the UEM board for the remote pot to work, as per tech support.