The Chiller Guys Hub | Site-Wide Activity

: We have a smardt chiller HMI display that […]

Wed, 14 Oct 2026 11:13:58 -0400

We have a smardt chiller HMI display that stopped communicating and displaying points. It still runs with our commands but we cannot see alarms or trends on the display. I’ve tried a few things to get it to work but it looks like maybe the HMI is missing something to talk too the main controller. Has anyone delt with this?

: Does anyone have anything they’re willing to share […]

Mon, 12 Oct 2026 02:00:34 -0400

Does anyone have anything they’re willing to share inregards to bidding a CVHE Overhaul? Im about to put a bid together for a CVHE500 that ruptured a tube in the condenser by means of which have not yet been determined. My company, nor my self have ever worked on this machine, only our local Trane has ever serviced it. Im interested in other…

: Not really chiller related, but I finally decided to […]

Sun, 11 Oct 2026 04:38:02 -0400

Not really chiller related, but I finally decided to install the Micro Air Easy Start on my home 5 Ton unit.
Works as advertised, very pleasantly surprised.
Replaced the contactor and cap preemptively since I don’t know when those were last changed as well (though I was not impressed with the mounting straps and will replace those…

: Hi Guys,Need your support if you have a manual of […]

Sat, 10 Oct 2026 05:56:11 -0400

Hi Guys,

Need your support if you have a manual of this Compressor

Thank you

: I’ve been in the HVAC/R industry for about 5 years now as […]

Tue, 06 Oct 2026 21:58:49 -0400

I’ve been in the HVAC/R industry for about 5 years now as a general technician and I’ve decided that I really want to start pushing my career into the chiller side but don’t know where to begin. I’ve talked with my boss about it and he’s said he’d try getting me training but the department I’m in has no senior level chiller techs or enough…

: Dear team i need support. i having Carrier 30HX chiller. […]

Sat, 03 Oct 2026 04:35:52 -0400

Dear team i need support.

i having Carrier 30HX chiller. in this chiller have TQ valve problem, part code is 30HX412-312-EE-A .

This part is absolute, from carrier. so any one can help. get this part.

: Hello everyone,Recently I had a Carrier 30RBF12064RLMV6C […]

Fri, 02 Oct 2026 21:24:25 -0400

Hello everyone,

Recently I had a Carrier 30RBF12064RLMV6C has tripped out on Co.B1 , Co.B2 , Co.B3 communication loss with compressor SPM with the last 2 weeks. Ive checked all the wiring. Is there something that i have missed ?

Is there a cheat sheet for troubleshooting these issues ?

: Just had these 2 rtaf chillers tab'd last week. Install […]

Thu, 24 Sep 2026 20:56:17 -0400

Just had these 2 rtaf chillers tab’d last week. Install was 7-2025 and still not really fully commissioned due to so many issues with controls,programming, and some yet to be completed odds and ends. But my focus here is water flowrate. This is literally all we recieved for a tab report. The guy performing the tab work said he didnt have…

: This is a good one! I hope somebody has run across […]

Wed, 23 Sep 2026 19:05:16 -0400

This is a good one!

I hope somebody has run across this problem. There was an active leak, purple water coming from the pipe it led to the chiller. The smardt chiller. I took action by disconnecting or powering down the chiller at the disconnect. What’s the leak was repaired I turned to disconnect back on but the communication was lost from…

: Does anyone have documentation on checking oil filter for a York YCAV?

Mon, 21 Sep 2026 21:10:28 -0400

Does anyone have documentation on checking oil filter for a York YCAV?

: Hello technicians,I am encountering an issue with a […]

Mon, 21 Sep 2026 11:56:53 -0400

Hello technicians,

I am encountering an issue with a Hitachi chiller. After replacing the screw compressor and completing the installation, the unit frequently reports a “low suction line temperature” error.

Could you please advise on how to resolve this?j

: hi any body have siemens climatix scope light . if you […]

Sun, 20 Sep 2026 17:09:40 -0400

hi any body have siemens climatix scope light . if you have please please share with me. i need to change the date.POL CONTROLLER

: just commissioned .from India

Sun, 20 Sep 2026 16:39:41 -0400

just commissioned .from India

: Hello, reaching out to see if any has and can share or […]

Thu, 17 Sep 2026 15:20:05 -0400

Hello, reaching out to see if any has and can share or point me in the direction of a RTHB IOM. I can find some fragments of manuals online, but pretty much all I can find only goes as far as the table of contents.

It appears Trane’s literature number for this manual is “X39640435-01”

Ive recently become responsible for this chiller and like to…

: My offoce is looking for a reliable scale that fits […]

Wed, 16 Sep 2026 11:20:00 -0400

My offoce is looking for a reliable scale that fits the recovery 250’s without having to teeter on the base. What are yall workin with?

: Has anyone come across a YLAA Chiller that changed its […]

Wed, 16 Sep 2026 06:27:50 -0400

Has anyone come across a YLAA Chiller that changed its type from Liquid Chiller to Condensing Unit?

This is a 2024 model on R454B with EEV’s.

It had two faults for this, but it is running fine now. Faults recorded 6 months ago. No one on site would go anywhere near the chiller, so not sure how this happened.

: Hey fellow chiller techs, I’d like to introduce myself. […]

Sun, 13 Sep 2026 20:34:23 -0400

Hey fellow chiller techs, I’d like to introduce myself. Bill Neigel and I currently work for MM Services in Greenville SC. New to the Upstate moved here two years ago. Prior to I lived in NJ for 54 years and I’ve been doing HVAC and refrigeration work since 1987. Photos are of the most bizarre chiller ive worked on to date. Edwards Engineering…

: I have a Trane 410t RTAF. I have circuit 1 locked out […]

Fri, 11 Sep 2026 23:02:51 -0400

I have a Trane 410t RTAF. I have circuit 1 locked out on the HMI. As it is being repaired and is on a vaccum. I am looking to run circuit 2 but the low evap pressure on circuit 1 inhibits circuit 2 from running. I have been reading document # RTAF-SVX001P-EN and I cannot find why circuit 1 is holding off circuit 2. I have 75psia in the evap of circuit 2.

: looking for Trane software download

Fri, 11 Sep 2026 13:51:01 -0400

looking for Trane software download

: Gotta love the harmonic sound of 12 screw chillers loaded up

Thu, 10 Sep 2026 20:38:57 -0400

Gotta love the harmonic sound of 12 screw chillers loaded up

: Worked on Vintage WME vintage A igbt bridge fault

Thu, 10 Sep 2026 16:33:41 -0400

Worked on Vintage WME vintage A igbt bridge fault

: First overhaul. Trane CVHF770. It was a great […]

Thu, 10 Sep 2026 16:20:57 -0400

First overhaul. Trane CVHF770. It was a great experience. Been in the field for a while now and just transfered to our Central Plant Team last year. It was intimidating at first becaue of all the rigging, but me and my coworker knocked it out. It was a great feeling hearing it start-up. Looking forward to doing some more! Still have a lot to learn.

: We have a client with three of these old […]

Thu, 10 Sep 2026 15:59:20 -0400

We have a client with three of these old Carriers 30HR140-600C. A few years back we replaced the original controllers with Honeywell T775s w/expansion modules. Also converted to 407C. Some leaks, some TXV heads, over the years, still running strong. These are about as big as we go as a company. No centrifugal work. These run like sewing…

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Thu, 10 Sep 2026 15:57:43 -0400

: Hey group, im 39 yo and with 20 years experience and […]

Thu, 10 Sep 2026 15:56:42 -0400

Hey group, im 39 yo and with 20 years experience and still learning thisbtrade everyday. Pic of a York that had clogged coils and bad vfd for a bank of fans. Happy wrenching!!

: Not my first post here but thought I'd say hello. Signed […]

Mon, 07 Sep 2026 13:43:28 -0400

Not my first post here but thought I’d say hello. Signed up months ago but only started reading through some useful post to find information most guys wouldn’t share.

Name is Melvin and im a commercial HVAC tech in Hawaii. I don’t know everything, and still have trouble calls kick my ass every now and then like im always the one finding the…

: Hey guys, just wanted to share and pick everyone's mind […]

Mon, 07 Sep 2026 12:12:08 -0400

Hey guys, just wanted to share and pick everyone’s mind and gather different thoughts. I am currently working on a Trane RTAC Chiller for a good client of our company. I have been working on this issue for about 6 months now because the chiller was neglected and has severely gone years without proper service. My first inspection of the unit had…

: Looking for any supporting manuals for an overhaul on […]

Fri, 04 Sep 2026 22:09:40 -0400

Looking for any supporting manuals for an overhaul on a Carrier 19EA. Any information is greatly appreciated

: team, Does anyone have any literature on the PETRA chillers?

Fri, 04 Sep 2026 15:44:55 -0400

team, Does anyone have any literature on the PETRA chillers?

: Has anyone had any experience installing/ servicing […]

Thu, 27 Aug 2026 17:47:30 -0400

Has anyone had any experience installing/ servicing Midea SCAH Inverter screw chillers? Company is looking to take on some contracts servicing some of these but I’m not familiar with them. Any known issues or things to keep in mind when servicing?

: Hey Guys,Have a 19DK that needs to have the vane […]

Thu, 27 Aug 2026 15:50:12 -0400

Hey Guys,

Have a 19DK that needs to have the vane assembly rebuilt. Anyone have the procedure?

: Gents how do you add oil to this water cooled […]

Tue, 25 Aug 2026 02:55:43 -0400

Gents how do you add oil to this water cooled chiller.The oil separater is in condenser barrel do I add into the discharge line or oil line right before the pump next time I will have more photos thanks

: Having oil flow alarms on RTAC 2254. Have about 7" in […]

Mon, 24 Aug 2026 17:01:21 -0400

Having oil flow alarms on RTAC 2254. Have about 7″ in oil seperator. Unit will start then low oil flow alarm after short run time. Only oddity I can find is computer pressures match gauges. But HMI displays 15psi difference. With alarm being strictly math calculation by machine could this be causing alarm. Its odd HMI and computer read…

: Has anyone actually attended Trane training, […]

Sat, 22 Aug 2026 00:30:50 -0400

Has anyone actually attended Trane training, either technician side or engineer side, up in La Crosse, WI?
My maintenance guys are asking to possibly get some training but didn’t know if paying for the trip up there was worth it. Wondered if anyone here has experience with it, positive or negative.

: Happy Friday everyone , I want to replace a Carrier […]

Fri, 21 Aug 2026 23:45:27 -0400

Happy Friday everyone , I want to replace a Carrier Screw compressor internal oil filter , I know behind the filter there is a check valve to prevent back flow of oil and gas . I did it twice long time ago but I dont remember I need to twist the old filter CCW or CW to remove it . Please bring my memories back , I am heading to be 67yrs old

: "Hey I think y'all didn't wire some of the sensors […]

Fri, 21 Aug 2026 18:47:01 -0400

“Hey I think y’all didn’t wire some of the sensors back correctly on the chiller.”
“We did a point-to-point check, what makes you think that?”
*Sends following photo*

: HiI have new job for carrier 30xa chiller 06TVA […]

Fri, 21 Aug 2026 08:26:58 -0400

I have new job for carrier 30xa chiller 06TVA Compressor ovehauling. please i need to find the service manual for this compressor anyone can help me

: I've finally found time to post on the hub. Lil story […]

Fri, 21 Aug 2026 02:44:47 -0400

I’ve finally found time to post on the hub. Lil story about my 1st year in the chiller world.

I put in for Da***n applied. Didn’t hear back. Took another job… hated it. 4 months later.. I get a call that felt like a come play for Tom Brady call. These guys(2) had 30ish yrs in the game combined. Hell yea.. Im going to work for people smarter…

: My company is doing data center work. office is based […]

Thu, 20 Aug 2026 14:36:36 -0400

My company is doing data center work. office is based in Houston. Job sites are remote. Texas , Geogia and more to come. We are hiring Tech 1 thru 4. Alot of travel

: Hey Guys, hope all is well.Looking to see if anyone has […]

Tue, 18 Aug 2026 22:28:10 -0400

Hey Guys, hope all is well.

Looking to see if anyone has the IOM for an Arctic Water Cooled Chiller.

Attached is rating plate

Thanks in advance for the help!

: i am having problems downloading material and pdf's in […]

Tue, 18 Aug 2026 20:13:15 -0400

i am having problems downloading material and pdf’s in the courses. i am running windows 11 on my laptop. Anyone have any advice?

: Here is a little project of mine , AI has done a lot of […]

Mon, 17 Aug 2026 19:27:51 -0400

Here is a little project of mine , AI has done a lot of the heavy lifting.

Being a ex OEM tech I often miss the tools that I used to have access to.
This is a Modbus tool that is nicer to navigate then most onboard interfaces.

It has also been useful for correcting issues after BMS has altered values that where not accessible via the HMI.

I…

: These have to be one of the most inaccessible machines […]

Mon, 17 Aug 2026 18:14:34 -0400

These have to be one of the most inaccessible machines I’ve ever worked on.

: Hi guys,Hope you're well?Just a query for someone who […]

Wed, 12 Aug 2026 14:28:26 -0400

Hi guys,

Hope you’re well?

Just a query for someone who may be able to assist.

I have to replace a Trane sensor (SEN02039) for the ambient air temperature sensor.

Now Trane want £1,223 for a visit plus materials and can’t assist for 3 weeks, due to work load.

I would like to do this myself but need to know what software to download to allow me…

Wed, 12 Aug 2026 09:02:52 -0400

Wed, 12 Aug 2026 08:47:27 -0400

Wed, 12 Aug 2026 08:46:58 -0400

Wed, 12 Aug 2026 08:46:39 -0400

: We have picked up a maintenance account and the sites […]

Tue, 11 Aug 2026 17:14:23 -0400

We have picked up a maintenance account and the sites have several Daikin WMC0 36,43,48,’s. I have not worked on these before so not familiar. Where can I get a certain log sheet for these. Also IOM and possibly even training.

: Im working on a 50 Ton Daikin AGZ. System is […]

Sun, 09 Aug 2026 21:21:39 -0400

Im working on a 50 Ton Daikin AGZ. System is grossly oversized for application. I currently have Circuit 1 Tandum out for quote but were trying to keep Circuit 2 online. It started out once in awhile C2 Low Evap Pressure but now its everyday. Compared physical pressures to transducers and both read accurately. System has a new flow…