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Try cleaning out the internal section of the thermal wells of all old paste. Clean the temperature sensors of all old paste. Lastly, remove the wells and clean or replace them with new wells in place...

Yeah, that is more than likely all oil that’s in the evap sight glass. I can expand the picture enough to detect its color. It appears to be all oil. It be interesting to learn why this was done....

Returned to the job site in Jamaica. This time I have a new laptop. The hyperterminal did not work. It did with my last laptop. This new one, Terra term worked, hook up as you would the...

I spent 2hrs on a YVAA, going thru testing each baud rate until it began printing. I wrote it on the inside panel. I haven’t been back since before pandemic. I can’t remember what it was that I wrote...

How would you use a 9v battery, as much of what I work on is 0-5vdc. I’m concerned with damage due to the additional voltage present with the battery.

Good evening everyone, again thanks for the replies. I am considering this purchase, relatively cheap on some popular websites, at under $100.00. I do nearly all my work on large tonnage chillers....

Hi Guys, I’m considering purchasing a signal generator 0-10vdc/4-20ma. Has anyone ever used these on LTC/RTU w/VSD’s, sensors or transducers for troubleshooting?
Thank you all for your replies.

I think he may have confused the issue.
Avg.25’disharge superheat (1)de superheat at first third of the condenser. (2)Center portion it should be at saturation temperature. (3)Final third;...

Since this usually occurs after service, determine operating status. Just like the original post here,little to no sub cooling can be an indication. How much air is actually going thru the coil? are...

I’ve run into similar issues due to misplaced fan blades on condensing units over the years. If the blade was installed at an improper height relative to its design placement. It will move a lot of...

Good evening guys, another possibility is fan blade placement. If at some point during dismantling they improperly situated the condenser fan blade. This can result in a lot of air that is not being...

Hello Dicko100, Maybe your client would consider a Battery back up system to prevent it from being restored to Local mode on the chiller during power outage. As a go to option, until you can receive...

Hi guys, in our office in Miami, we would alternate removing heads during the annual inspections and tube brushing. Giving us an opportunity to install fresh gaskets and exercise all nuts and bolts....

Good afternoon All, I was checking for this exact topic. I have clients who have the condenser style heat exchanger and rarely service them. My question is if a 17 cal.= 1/4” tube brush. Would a...

You may need to confer with the boss, if the customers are paying for this every year. It is additional charge and there fore income for tour company.
2nd: your customer Base will notice the lack...

My buddy made one with a 3/8” copper 25’ line set, Out it in a 7/11 orange cooler and added inlet valve and outlet refrigerant valve. Dumps dry ice or several pounds of regular ice & hooks it up to...

Hi guys, I’ve had a FP Pressure transducer SH/SC head for a couple of years. I use small rubber, instead of screw cap, to cap the transducer when I’m not using it. It keeps dirt from going inside...

Hi Guys, yes a triple evacuation would be the order of the day. I’ve had refrigerant leaks pull through to the evacuated portion of an evaporator before. From a running system on a dual evaporator....

Hi guys, I have to congratulate all of you for the support given to Industrialtech throughout this repair. Congratulations!!
Industrialtech, this is for you, I noticed something on pg2-4th photo....

Seriously,a lot can happen using the codes without being totally knowledgeable about the chiller operation and controls.
Use at your own reputations risk.

Yes,a low end surge, as I used to hear it referred to. which actually means the chiller is in stall. Can sound like a bad bearing or marbles if it is a an older York YT low pressure chiller. Its...

hyper terminal on a laptop can sometimes means finding which usb port it sees on the laptop. every chiller is different, sometimes port 3 or 4 or 5. Like Raptyr said check your baud rate too. Once...

hi guys, def check the purge outlet, sometimes it can get blocked up with crud, preventing the purge from venting. its going thru the motions but non-condensables have no way to be released.

Hi Mitchellpsp,would you have the instructions for the guide vane rebuild?
I have the parts book and am going over it for a job this week. I'm recovering refer now. But would like to see it in...

Thats what my dad used except with a 30amp breaker for slightly larger compressors.

I use the Velcro type temp.thermometer and it fits best with 3/8" or larger.
Anything smaller and I just hold it against the pipe and take my readings then.

I keep a bottle of vav pump oil or Refrig. Oil and coat the fittings if I suspect a leak. Oil gets drawn in and provides a temp.seal to fittings. This helps when needed. You'll see the microns drop...

You can just by 120vac or a 28 vac/dc led bulbs. It's what I use when in need,came up with it on an old style york chiller. Attached it to the load/unload block wires. And checked unit from the...

Nitrogen without regulator. 2 hands on the hose-6' hose 1/4" tip on end. Run unit and blow upwards from bottom of condenser coil. Old time strategy with units where water was or could not be used. It...

Hello guys,I just got a YS"D" style started up & it shut down on this same fault. Back story is chiller failed last year. Customer has rebuilt compressor and it faulted again. Hasn't run in a...

This system is starting or changing from an internal condenser loop bypass to keep water warmed. It may startup at a decent temp. For chiller operation. Let's say 70-85' operating temp for condenser....

I use individual gauges with the snub piece connected to low loss fittings. Basically, I use the high side gauge the most. May only catch and put back to low side,could 2-4oz at most. But I learned...

Should there be some kind of check valve to prevent water loss?
It would help if we had a clearere picture of piping arrangement, tower type BAC,MARLEY ? Is the bypass near tower of in chiller room?...

Shot in the dark,but if this is a cgam. And they have the scroll compressors. You need to check if there is an INT69 module in them. Sometimes when not secured tight enough or clips are broken. Jolt...

How was system running prior to this problem? Is this a new install or a renovation gone wrong?

Wow:it's more like DO AS I SAY,NOT AS I DO":bsing:

:cheers:

RSES is a good provider of information on refrigeration theory and practice. And there is an industry devoted to large refrigeration equipments out there. I was looking not too long ago for myself....

I keep a pair of snub type gauges for sytems where charge is critical. But I use them often enough. Why,because if everyone hooked up gauges before me, that alone can leave a unit undercharged. Yes,I...

1990-ish,installed two split systems in a loft apartment in nyc. Both air handlers in back room leading to service elevator. But still in the apartment,e months later,we get a service call,water...

Gentleman,I love this post and Stan while it's been a few years. I hope all is well with you and your family. Awesome display of collaborative efforts and truly sound diagnostic procedures. Just...

Heres one I just remembered, had a service call for no cooling. Arrived onsite to 5 story brownstone walk up,in mid manhattan. It was nearly 90' inside, and painters working on the stairwell,and the...

Thank you guys. The info has been helpful to me in understanding the operational value of level operation. Now I have a reason to purchase a laptop,just for work purposes. I'm going to arrange to go...

Thank you screwit,we have an rtac170ca/ which I noticed that ckt 1 maintained a -0.1 level and ckt 2 stayed at -1.1in. Now ckt 1 operating but with higher than normal head pressure (134a system)....

Please move to pro forum.
:oops:

:putergreet:

If the pump is drawing through the barrel first,it becomes an extremely expensive water strainer. Compounded by signs of expansion and contraction. You need to open and check both water inlet and...

Just an fyi;returned to check that 360 unit.. sure enough 3 blink Hp2 alarm active. This is what I did,I checked compressor compartment. Found the int69 module clips broken,that would hold module...

YEP,Problems with unit that trip on Hp2 (3 blinks on led) random times. Troubleshoot for 1 day,convinced it was the board. I had replaced the hp,only to have it trip again. This time without...

:gah:
To fhp ec360 boards!