LENNOX NO COOLING CALL
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- čas přidán 29. 08. 2024
- This was an interesting Lennox no cooling call where I found one of the two compressors disconnected. Once I tested everything I went ahead and re connected the compressor and found it to be working properly. I went ahead and checked out the second stage and found that to be short on refrigerant.
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It would have tripped me out to find a disconnected compressor not knowing why , I'm not sure I would have had the cojones to plug it in again, but now that I've seen you doing it and taking the appropriate steps , looks like I'm gonna have to grow a pair ! Thanks again, Chris , man's getting better just by watching your vids in the comfort of man's home !👍
20 yrs HVACR did not know about C to X for board lock out. can you talk more about. what a time saver. love this site!!!
Todd Dunn me neither
I am amazed how many technicians don't know that you need an ohm meter that reads millions of ohms to find a grounded compressor.
Most FLUKE clamp meters only read in the thousands of ohms. Amprobe or Fieldpiece are my favorites.
I just started the trade a month ago after graduating from the trade. Your knowledge and CZcams videos have help me so much and I hope you keep making more content. I appreciate the time you put into these videos
Thanks bud
I will be going live on CZcams this evening 7/8/19 @ 5:PM pacific time come check it out if you can czcams.com/video/11n-kqTVvD8/video.html
Very good commentary on this especially when you encounter a unit like this with so many unknowns, (one compressor disconnected, one stage not working 100%). You hit all the major diagnosis points and this where your experience comes in. Sometimes these can be frustrating and you can get lazy like not recover the charge and measure, etc. This way you know where the starting point is. Awesome diagnosis and fix to an old unit to give it some life again. I did notice you got the BTUs back up to about 10 tons at the end. Could have ended differently for someone that doesn't have the experience or desire to diagnose. Great work Chris!
Thanks bud
Not a hvac guy but I've been binge watching your channel. It's all pretty interesting and you explain everything so anybody can understand. Your troubleshooting skills are awesome. Being a maintenance tech myself I can appreciate the skill. Lol
Keep up the good work :)
Good job, nothing wrong with taking a little extra time to get the unit running better for the customer. Compressor running backward can confuse some newer techs, good job explaining that.
In 4:35 you can see that you reversed blue and yellow wires on the compressor contactor like Jimi Park wrote before me .!!!
I worked for an outfit that guys didnt understand phasing. They put 3 compressors in one unit. The fourth I installed and made sure phasing was proper..never had an issue with that unit after that. Strange things people do at times. When you run hard and many many hours to make money mistakes happen. You guys out there running 24hr shifts aren't good for yourself or customers. Be safe out there.
Thank you again for your videos.
I LOVE that sound at 7:00 !! Stereo compressors
when you connected up the compressor the first time, u had it red blue yellow , where as line side was red yellow blue as the otherside was. unsure how u determined how they had it hooked up previous
Long days on the roof it happens.... I remember replacing an evap heater on a reach in one time I kept thinking I had the wrong part until I realized I had it upside down🤤😂
@@grindstone5368 your not wrong, i remember once pulling a inverter pcb out of a unit, reinstalling the same board, spending like another hour re diagnosing the same board only to realise i did not put in the new pcb hahahaha
Oh that explains! I did notice that later it was blue, red, yellow and I was thinking that should not change rotation. Correct is 1-2-3 and now it is 3-1-2, yes it shifts phases, but does not change rotation.
Enjoy your videos. Sitting at home waiting for hip replacement. Picked up a few tips watching. One thing I would cation you on is pushing in contactors. Especially 600 volt. I’ve heard of a coworker having a contactor blow apart in his face. Play safe
Liking the 📹 as normal you sort out the customers problems where others has failed at least u go through every part of breaking down the units
this was a really good video. appreciate it. had a call the other day bad fan motor. went out and replaced the fan and didnt come on. so i was thinking it was defective till i started looking at the cap and contacter and everything was just hooked up randomly. really odd. i think so body the lady knew came out and tried to help or something because it was some crazy stuff.
You did smart with the rotation. I have seen that before with it being missed by many including myself! Great observation!
"Someone" disconnects a compressor and it becomes a mystery. Why don't you commercial HVAC techs place service tags on those AC units?
Like the troubleshooting. Keep up the great vids. Thanks for sharing your knowledge.
You should have your company get you guys service tag note stickers to stick on the inside panel of the units so you can write down notes after every call to help the next guy. We use them and there helpful
we kind of already have that with our invoicing system we can look up previous service history for that particular piece of equipment, and yes they are very helpful
Good job and good practices I enjoy watching your videos, one day I will get some of those wireless probes. God bless you.
Great video, thanks for the great content as always Chris
Great work, it would be nice seeing you do an install!
I usually check a scroll with an amprobe, wrong rotation=low amps, then put my gages on if needed.
Own it.. I teach all my apprentices to write dates and initials on filter changes. Write with marker brief parts changes or disconnect of parts on doors. Write dates with paint pens on ALL parts with initials. I dont except less from our apprentices I and us other journeymen teach.
Now that's how you troubleshoot ... Good vid Bud ...
Another good one on troubleshooting 👌
Cleaning of coils, my favorite part!!!
Thanks for the videos bro 😎
Great video Chris!
If you look at the top of the contactor, you will notice that the phases are placed in different order than the other one. That maybe was confusing.
always good video thanks Chris
Great job again like always
Good one chris
Splendid work sir!!
Awesome video
Great video. I bet it was a phase rotation the whole time.
Nice troubleshooting / repair
Thanks bud
Love ur vids keep up the good work
Thanks bud
Your welcome ive been watching for over a year now and i have learned a lot of stuff. Also thanks for responding
Great video
Good job on your videos
Those 1/4 end caps at the top of your gauges are nice. I’ve been looking for them but can’t find them. I have smart gauges with a couple tee so I don’t really need gauges at the top either
5:29 spinning backwards LOL
great video
Nice!!!! ( you never checked the contacts on your contactor!!! That could cause dropped phase intermittent even!)
You're the man I always enjoy your videos thank you
Informative video ,still I think should have checked the Ampere for that compressor
There is no excuse for goons destroying a 9k coil. Wow. Bet that works on you with your work ethic. Angroso!
Loud compressor often is reversed polarity.
I will be going live on CZcams this evening 7/8/19 @ 5:PM pacific time come check it out if you can czcams.com/video/11n-kqTVvD8/video.html
Thanks
Good stuff Chris, I was thinking non condensables in the system until you recovered the gas, Great approach, I like the MQ app but thought you got the new S man set up? Preference? Thanks for your time and tips always appreciated
Thanks Chris, yeah I got the new Sman 480 but I still prefer to use my smart probes on something like this. On another note I heard a little rumor that the new sman 480 might work with measure quick soon.....
Not trying to bust your chops but why not try sporlan smart tool? I’m sure they would give it to you for the pub
I have actually been thinking about ordering the Sporlan tool to try it out, but I made a decision to not accept any free tools anymore. I want my opinion to be honest and not biased, so if my research turns out good I will order a set to try out.
My guess just by the sounds, that the compressor was running the wrong way. I even patted myself on the back 👏
im commenting as I watch and I was thinking overcharge too. Maybe dirty condenser but I doubt it.
It's usually the case some simple maintenance and stuff works better plus the wire swap
Hi can you make video about PCB BOARD EXPLAINS PLEASE THANKS
If I ever decide to move to California ill hit you up to see if you need a tech. 😊
Good Stuff Bro.💪
should have taken the cover off #2 compressor and compare wiring. if there is not a liquid port, i install one, fast fill with liquid the units charge.
What do you mean by approach temperature? I see it a lot when your using your measure quick app but haven’t heard you explain what it is yet
Approach temp is a performance measurement of the condenser. It is the difference between liquid line surface temp and the outdoor ambient temp.
My workplace has old mcquay ac unit with old water cooled chiller to send cold air to the building
5:04 um ,yep, that's a scroll running backwards LOL!!!
Is it me or does the compressor sound smoother now that you topped it off?
Is this the unit you left in test mode? Because you said that it was a very old one.
No but it was one similar
Wow, it looks like the coil cleaners should be buying them a new condenser coil...
Hello Chris , why dont you use a Insulation tester (megger) to check the compressor and give you a better reading checking Megaohms or even a Fluke. I just dont trust the fieldpiece.
Copeland says to not use it.
chris soto here is some text from the Copeland tech bulletin # AE4-1294 I will paste the bulletin link at the bottom
"When using megohmeters to evaluate the motor
insulation of compressors, it is important to understand
that they should not be used as one would a volt-ohm
meter. A single megohmeter reading gives little insight
into the condition of a motor’s insulation.
Megohmeters are best used as a part of a regular
maintenance program to monitor trends (over several
months). For example, one might record a megohm value
and compare it to a previous reading. If subsequent
readings show a trend of lower and lower values, then
corrective action (such as system clean up) should be
taken."
opi.emersonclimate.com/CPID/GRAPHICS/Types/AEB/ae1294.pdf
@@HVACRVIDEOS
Thank you,
I appreciate your feed back.
I was just curious but thanks again!!
Keep up the good work!! I love your videos!
Thanks bud
Is there any other cool hvac apps like that or maybe for diff brands
What’s the reason you tip the recovery tank upside down? And is the hose connected to the vapor side of the recovery tank?
Chris what setup of gauges is this, is this iManifold, ooops sorry asked question before I saw your Bluetooth gauges, near the end of video, looking into a new setup
Electrician here. I am really curious about the Samsung unit that shows you all the pressures and temps. Can you give me a tip on where I could learn more about that unit? Thanks in advance...Dan
I will try and make a video soon on it
Are these lennox units using linux operating systems?
How is the app, measuring the temperature flow?what are the two yellow devices called? all this shown on the tablet!
It's called a Fieldpiece charging kit and he's got the links down at the bottom, I believe the app he's using is called measure quick
@@Gcanno thanks, my Friend! that's the right tools for the job and it only helps to use them; whenever they're needed.
I got one kit, but it didn’t show live on home screen. I have tried it on different units and deleted it and reinstalled it, none wouldn’t work. I have contacted Measurequick, but got no response.
nice bud
4:15 the usual way it's done is called shunting, the crankcase heaters are wired to the line side of the contactor, when the contactor pulls in, the compressor (being the larger load) takes most of the current, thereby reducing to nothing the current going to the heaters. When the compressor shuts off, the heater energizes again........i think LOL
There should be nc and no contacts on the contactor
The heater should be on the nc side
If the contactor pulls in the nc side goes open
Are you Using the discharge pressure when calculating subcooling? or is there another wireless probe that I cant see?
Excellent Trouble Shooting.8/1/2021
You have the blue and yellow wire crossed.
14:07 thought i got a text. :P
Do you now what can cause the freezer to stop working
What do those guys clean the condensers with, a sledgehammer?
Can that happen to a home condenser compressor go up on over load ?
what's the name of the application to measure the compressor voltage
I’m not an hvac guy. Or refrigeration... but why does harmonizing compressors sound so good? Haha
Just looked on fieldpiece, what is the model number of your setup, don’t want a clunky yellow manifold
Here are links to my setup Samsung Tab A amzn.to/2IZxSKY
Ottor Box case amzn.to/2ZWYIZZ
Fieldpiece JobLink probes amzn.to/2XeiKNI
What's the software program you're using Chris?
Measurequick you can get it for free on both app stores
I didn't think I was still a noob. What's approach temp?
Approach temp is the difference from the outdoor air temp and the liquid line temp. Lennox uses this as their charging metric instead of subcooling.
I can feel the vibration on my phone even
I was waiting for a new vid I can't sleep but now it's 2 am and whens next live stream
why you have recovery tank upside down
wasnt this the rooftop were the tweakers destroyed the drain pans?
No it's a different roof
ok thanks
Where can i find out more on how you made the unit call with push of button on board
the unit manual has all the information www.lennoxpros.com
What is exactly "Approach Temp" and what does it tell you? How do you find it? Never heard of it, great video.
Approach temp is a measure of the performance of the condneser. It is the difference between outdoor air temp and the liquid line temp.
@@HVACRVIDEOS thank you for explaining!
I will be going live on CZcams this evening 7/8/19 @ 5:PM pacific time and will discuss your question on my stream come check it out if you can czcams.com/video/11n-kqTVvD8/video.html
@@HVACRVIDEOS what's the ideal approach temp. is there a general rule? thanks.
Only Lennox uses approach temp. Better off checking for proper subcooling and superheat.
Do you guys see much traulsen unit work there
Not that much anymore
I need a good recovery system possible you could shoot me an link to on
Hey chris, r u ok buddy? Herd a 7.1 hit round yells area..you feel it?
Yeah we are fine it was about 120 miles from us. We felt It but nothing bad happened
That’s a weird find.
What’s the name of the compressor app Chris? I never knew they had that
Copeland Mobile
I will be going live on CZcams this evening 7/8/19 @ 5:PM pacific time come check it out if you can czcams.com/video/11n-kqTVvD8/video.html
What is the app you are using ?
My Fieldpiece does not look like this
The app is measurequick
I wanna buy me the fieldpiece gauges from your affiliated company. Do they ship to the UK? I currently service vehicles for now and these gauges are 75mm but there might be reducers available on the internet. I wanna replace my old dial gauges with the long-ass hoses that leak gas (R134A). These fieldpiece gauges don't leak. I was thinking about using PTFE on the reducers and screwing them into the wireless gauges.
HUH! Strange
What do you mean by “approach temperature” ?
The approach temp is the Difference between the liquid line temp and the outdoor air temp. Lennox uses this as their method of charging instead of subcooling
HVACR VIDEOS thanks for clearing that up
@@101pirate2 i was gonna ask the same question but was feeling bad for not knowing what it was , you beat me to the punch
@@HVACRVIDEOS Is the approach method alone good enough to assess one of these units? I would assume you would also want to assess the discharge temp in some fashion as well to ensure it actually has the correct charge in it. I do it all the time by simply feeling the liquid and suction lines to get a quick reading on how well a system is working, but it seems odd that they would use that as the sole basis for assessing the charge. Probably good for a new unit but seems sketchy on something that's out in the field and is old and crusty.
3:33 I don't believe that is a valid test to see if that tubing may be used as a proper and functional ground. It may well be but that procedure cannot verify such a condition. (Not trying to be critical however it may mean the difference...)
Videos are brilliant ! Over here in the UK r22 is banned for us wondering how your customers will fair up when they are forced to change pretty much there full system when is it due to be banned in the US ?
R-22 will be banned in the US in 2020; any existing units using R-22 will remain in service until they are replaced.
We where allowed for a while to stick in a drop in gas but at the stage now we have to break the bad news to our customers that they need to replace there systems once a non serviceable call occurs
Funny how that works, for us we're allowed to service existing units with any remaining gas, just production and import are banned. I take it in the UK R-22 is completely banned and any units are required by law to be replaced/retrofitted?
@@stockholm2375we are the exact same over here in relation to import and production of it , we can also still service systems with r22 eg cleaning etc fan motors things like this but if we can see a clear shortage in gas or complete loss we are required by law to notify the customer to change it or retrofit it and to be honest in our case we see customers just going for a full change of system rather than retro fitting the costs with labour with retro fitting and installing a new system arent far off each other plus they get a nice warranty with new equipment the amount of times I come across r22 systems that are short knowing that could fix the issue but instead am not allowed is quite annoying am all about the first time fixes where possible