The customer complained that their kitchen ac was not working, this is my process of finding the problem and getting the unit operational
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00:00 SPONSOR CARD
00:10 INITIAL INSPECTION
01:52 FOUND THE PROBLEM
02:18 WHY IS THE COMPRESSOR DISCOLORED
03:50 RESETTING THE BREAKER
05:34 CHECKING THE OTHER COMPRESSSORS
07:13 CLOSING WORDS
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Fieldpiece MG44 micron gauge- https://www.trutechtools.com/fieldpiece-mg44-job-link-wireless-vacuum-gauge.html?affid=36
Fieldpiece 10 cfm vacuum pump - https://www.trutechtools.com/fieldpiece-vpx7-runquick-dual-stage-vacuum-pump-10cfm.html?affid=36
Fieldpiece Infrared leak detector- https://www.trutechtools.com/fieldpiece-dr82-infrared-refrigerant-leak-detector.html?affid=36
Fieldpiece Large wireless pipe clamp- https://www.trutechtools.com/fieldpiece-jl3lc-wireless-large-pipe-clamp-thermocouple.html?affid=36
Viper hand pump sprayer - https://www.trutechtools.com/viper-2-in-1-sprayer.html?affid=36
JB nitrogen purging adapter- https://amzn.to/3iwzaxc
Ratchet tubing bender- https://www.trutechtools.com/BlackMax-BTB300-Tubing-Tools-Premium-Ratcheting-Tube-Bender-w-Reverse-Bend-1-4-in-5-16-in-3-8-in-1-2-in-5-8-in-3-4-in-7-8-in-OD-Tubing?affid=36
Fieldpiece wireless scale https://www.trutechtools.com/SRS3?affid=36
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Bomber safety glasses - https://amzn.to/2yD6sbs
Bomber safety sunglasses- https://amzn.to/2zmhdPp
BlueVac Pro micron gauge - https://www.trutechtools.com/BluvacProPlus?affid=36
TruBlu pro evacuation kit - https://www.trutechtools.com/Accutools-A10757-3-TruBlu-Professional-Evacuation-Kit?affid=36
Accutools core removal tools - https://www.trutechtools.com/Accutools-S10735-Core-Removal-Tool-1-4?affid=36
Nitrogen purging regulator - https://www.trutechtools.com/Western-Enterprises-VN-500-HVAC-Nitrogen-Purging-Regulator?affid=36
Nylog blue - https://www.trutechtools.com/RT201B?affid=36
Flir One Pro thermal imaging camera https://www.trutechtools.com/FLIR-One-Pro-Smart-Phone-Connected-Thermal-Imager-Android-USB-C?affid=36
Viper coil gun- https://www.trutechtools.com/Refrigeration-Technologies-RT300S-Viper-Brite-Coil-Cleaning-Spray-Gun?affid=36
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For any inquiries please contact me at chris @hvacrvideos.com
Mailing Address
HVACR VIDEOS
12523 LIMONITE AVE.
440 - 184
MIRA LOMA, CA. 91752
00:00 SPONSOR CARD
00:10 INITIAL INSPECTION
01:52 FOUND THE PROBLEM
02:18 WHY IS THE COMPRESSOR DISCOLORED
03:50 RESETTING THE BREAKER
05:34 CHECKING THE OTHER COMPRESSSORS
07:13 CLOSING WORDS
This video is brought to you by sportlin quality, integrity and tradition. We've got a call on a kitchen ac, not working. Today we walk up to the unit. We have no led lights lit.
We also checked power at this guy. We have no power, so we need to figure out what's going on here, so we come over here to our disconnect switch right here and it's on. So we need to start downstairs, but we're going to do is go ahead and turn this off, because in case we find a trip breaker or something we don't want to reset it now. The next thing we want to do before we go downstairs is we're just going to go ahead and open this guy up and just inspect it look for direct shorts to ground, make sure all the motors spin just before we try to reset something.
So all right. So we're gon na check just really quickly everything to ground we're just gon na tone. It out. You know we're just looking for anything obvious, nothing and then we're gon na go to the load side of every contactor and tone it out to ground and we're just checking that so far, nothing while he's doing that.
We're gon na go just kind of visually inspect. All the capacitors don't see any swollen capacitors i'll come over here. Look at the condenser fan motors, we'll give them all a spin, make sure they're good and then we'll come over here to the indoor blower motor. Give it a spin again power's off make sure nothing jumps out at us.
It's not locked up. Okay, everything looks good, so we just need to basically go downstairs now see if there's a breaker off or what all right check this out. So we have a direct short to ground, keep checking the other legs nothing. So we have one leg shorted to ground on this guy right here, let's go ahead and we want to very carefully pull these off because the the terminals might be jacked up and they might blow out on you and then we're going to check the compressor to Ground so go and check to this guy, nothing there it is and there it is okay.
So we have a grounded compressor. So we're going to go ahead and isolate this guy um we uh, we checked the other ones, nothing there. So this is why you check this stuff because we don't want to reset the breaker and then have it trip again or blow a main or anything like that. You always check everything to ground to see.
What's going on and guys, i see the comments. I see you guys saying don't use tone use continuity. It gives you continuity and tone on these things. Okay, so we're paying attention to everything.
Um all right, so we're gon na go downstairs. Uh, pretty much guarantee we're gon na have a tripped breaker, but we're gon na isolate this compressor and then we'll go from there. Whenever you have a grounded out compressor. You always want to just see if there's refrigerant in the system spray it give it a smell that smells horrible if you guys have never smelled what burnt oil and refrigerant smells like it's a horrible smell.
So we know that that refrigerant is trash. The compressor's trash we're going to have to do a complete acid cleanup on the system purging with nitrogen um hh, core dryers, which is high, wax removal. If the customer even approves this, which i have a feeling they will, because i've heard that you can't get these units right now, so we're gon na go ahead. Nothing else was grounded at the moment. We're gon na go ahead and go downstairs. Try to find the breaker reset it and then come up here and check out the rest of the unit. All right and we've gone down to the breaker panel. It's tripped.
We have to turn it off, then turn it back on to reset it all right. We're gon na go ahead and turn on power unit's, going to start up we're going to quickly put our service gauges on the first and the second stage, just to see how they're operating and we'll watch the unit operations to see the condenser fan motors run and Everything we're definitely gon na have to change the compressor, but we just kind of want to get a general idea. We're not gon na go crazy through the unit, but just a general idea. If there's any other issues all right, our unit just turned on.
So we have one compressor, two compressors and obviously this one's not running so we'll see what the fan motors are doing. Two fan motors are running, but the other two might not run they're based off of pressure and temperature so or pressure. So we're going to go through it gauge up on the other. First two make sure there's nothing funky going on here.
It's interesting because there's really no like! Usually if it's been overheating, you'll see the sticker overheated or the top paint coming off. I don't see that, but there is like a white film to the side of the compressor and there's a white film to the side of the first stage too. It's kind of weird. I almost wonder if it's been flooding back, but the indoor blower motor is running so on a compressor change out like this.
If the customer ends up having us repair it, we would quote because it's a burnout, we don't know what caused it to go bad. So we would quote a compressor, a txv, add burnout, dryers and then, which are basically just spoiling hh course suction and liquid, and then we would um uh flush the system out with nitrogen. We cut it in multiple spots and blow the entire system out with nitrogen. That would be our our procedure all right.
My other two condenser fan motors turned on so they're all running. Now it was kind of tripping us out because the saturation temperature we were running like a 46 degree, evaporator coil and then all of a sudden boom it started dropping. But it's because the condenser fan motor is turned on now. We're not doing a full analysis on this.
It's about 80 ish degrees, so 90. 100. So i don't know it might even be in the lot the high 70s, but this is not scaring me too much now. This isn't a full analysis.
We're going to go ahead and jump onto the second stage, see what's going on there, just making sure there's nothing crazy, all right second stage or second compressor again, nothing too scary, i'm not doing a full analysis, but condensing temps about 106. This is our 22 43 degree evaporator. This is fine. I mean this unit's operational. We got to change that compressor fig. We don't know what caused it. So that's why we'll change the expansion valve with the replacement, but other than that we won't know we'll evaluate the whole system once we get all three compressors running, but the condenser doesn't look too bad. The pressures aren't reflecting.
I mean it looks clean all the condenser fan motors are running, there's not really much more. We can do on this. Guy uh looks like we've done. We've done some repairs looks like a condenser was replaced repaired right here because there's a bracket sticking out um, so yeah, i don't know if the customer is going to fix this unit or not, but it's operational for now.
It's safely isolated so that third compressor doesn't come on and we'll just give them a big picture quote. It is so important to not just reset a circuit, breaker. Okay, you always need to investigate and dig further to try to figure out why the breaker tripped i've told some stories before the cliff notes of it are. There was one catastrophic thing that happened to me where i reset a circuit breaker.
Actually, i replaced fuses without checking for shorts or anything like that. No direct, you know, didn't do anything i just put new fuses in it and it blew the fuses right away. Okay, i went ahead again. This was way in the infancy of my career.
I went ahead and put new fuses in it again turned it on and then all of a sudden the building went black, okay and what it did was it blew the main, the main that controlled not not just a panel right, not just the breaker in the Panel but the main that controlled an entire panel, it blew it tripped it, so i went downstairs to reset the main and the main failed. It could not be reset and the entire main melted internally and had to be replaced. Okay, so was it my fault that the main you know i mean it wasn't my fault, but i could have prevented that right by not just changing fuses. Okay, so that's a worst case scenario, and but it's so important, you know because you can cause more damage.
Now this compressor um, you know who knows how bad it is inside and by just continuously resetting it resetting it resetting it. We can cause some issues. We can make the problem worse right, so you always want to investigate dig through it. Try to find the source.
Look at the fan motors do a big picture. Diagnosis right, look at everything you you check the refrigerant see if it's burnt, if it actually has refrigerant in it, there's nothing worse than quoting a compressor job and not knowing that the system's completely out of refrigerant, because there's leaks in the condenser too. So you come back, you quote the job. You come back to. Do it you're like oh, my gosh. It needs a new condenser. Now you know big picture. That thing right always look at the big picture always give a big picture quote.
It doesn't mean that they're going to approve a big picture quote, but at least you did your due diligence and you covered your butt and you gave them all the information and let the customer do with it as they will right so stay tuned. We don't know where this one's going to go. I don't know if the customer is going to approve the repair. I don't know if they're going to replace the unit, we'll let you know once we figure it out.
I really appreciate you guys making it to the end of the video. You guys are amazing. Thank you so much and we will catch you on the next one.
Nice video
I am so glad this is not smell-o-vision cuz that is so stinky
Top tech 👍🏼
isn't this the unit that had the one compressor that sounded like a bucket of marbles? Service area Ottawa??
I am an access control technician, and one time I was doing a routine remote service call where I went to update the firmware on their door controller and it bricked itself… Was getting calls from the FM asking why none of their 50+ doors were unlocking now in their rehab facility 😂 I replaced it and all was well, but I know that feeling you get when a small problem all of a sudden gets REALLY big. Are you in Barrhaven ?
Ex colleague of mine miss wired a generator change over switch and set fire to the main power transformer for the whole industrial estate…
Nice job Chris.. Another great Video 😉.
On R22 compressor replacements do keep them R22 or do you retro over to something comparable?
Great video, on your estimate brake down of what you do on a compressor burnout replacement, how many total hours do you budget for a job like that (filters, cutting & purging with nitrogen, valves, compressor, & re-charge, etc.)? Service area Orleans??
Not resetting circuit breakers applies to houses too – a house down the street from me burned down this week because a breaker tripped and someone turned it back on without any investigation.
Odd question from someone with ZERO HVAC experience: if the compressor and txv are already being replaced and the coils being blown out with nitrogen, is it possible to replace the refrigerant in only one circuit on a multiple independent circuit R-22 package unit (as the one is shown in the video) with R-404A? Or is this just a really bad idea?
That's best case scenario when your 3rd stage compressor is burned. Definitely better then first stage. Great video like always.
Awesome as always. Great diagnosis.
I once blew the main to a mine building. Couldn’t find any problems on a 50ton condenser so we changed the fuses and when we turned power on it instantly blew the whole building. Turns out a small amount of water got into the disconnect and the electricity was jumping to it. 480/3 phase, shut the mine down for an hour while they went and found fuses
Great work Chris !
See what you need to do is get some straight copper tubing cut to length and jam in there instead of fuses then you don’t have to worry about blowing fuses!
Nearly 100% sure that's MacDon. 😆
Short and sweet, love the videos man.. you’re awesome Are you in Nepean ?
Very knowledgeable video as always man 🤙
We have all been that guy at once Chris When I was about 18 I repaired a two-inch fill line for 2 half-million gallon pools. long story short the repair failed flooded the vault that held the motors and filtration equipment of Six 20 horsepower filtration Motors. when I found it my heart sank that day the next day the owner of the company yelled at me and told me that I almost cost him over $80,000 in Lost Revenue and I guess rightfully so. We all make mistakes at times no one's perfect thank you for the great tips on your video keep up the good work. Things can always be worse :p
That’s really cool that you admit your noob move. Also your troubleshooting route sounds exactly like troubleshooting and electronic assembly Are you in Kanata ?
amazing mess the wiring has gotten to in these units..sure makes it harder to troubleshoot electrical issues..at least the schematic is still on the door;)
Dont forget before looking at big picture, check out the little small pictures too.
💪💪👍👍🙏🌍🇺🇸🐕🏒 Are you in Orleans ?
Just a little resi unit on steroids. Great vid
the word you are looking for when the compressor is burned its called phosgene
I came a cross a lennox unit with prodigy board that blew a fuse out of 3 I started by checking checking loads to ground, then caps and seeing if there was refrigerant in the circuits and finally the crankcase heaters. Found nothing wrong, so I went a head and replaced all 3 fuses
Started unit up and tested each load individually and checked amp draw finally jumped unit to full cooling for 15 minutes and everything ran fine. Still couldn't figured out what caused the fuse to burn kinda of brothers me lol.
Why I like manual resets in gas furnaces and elsewhere on some critical functions. Makes you check for dangers first.
One night I had to shut down the fridges and cold rooms of a big supermarket and then restart everything after the electricians had connected the new solar panels in the parking lot. The main circuit breaker failed to stay in place. A one hour job turned into 6. Worst scenario especially at night
Pennsylvania Dutch Shoo Fly pie and HVACR on a Sunday morning! What a combination.
I’m a licensed electrician and I know it’s sucks cooking a main but you did them a favor. It was faulty. I’ve replaced several mains in my career. I do service work for Arby’s and the COO that I deal with is proactive on replacing the ones in his restaurants. Love the videos!!!
Please come and big picture my new fridge 🙁 I thought from watching these videos I could get a bit of an idea but alas, I’m not 100%
Compressor is warm to touch
No lines are hot or cold
Some of the braise joints have weird colouring
Fridge no cold
My cider is warm 🙁
All my yogurt is ruined.
If only you were in Australia! Because your customer obsession is off the chain!
Very Good
This is not meant to be a criticism but a helpful hint coming from a 40 year electrician. Your narrative at the end is pretty much correct except, IMO, one thing. Before spending the time to check out the unit for shorts, I would have turned off the disconnect and then immediately reset the breaker. If there was a fault in the feed breaker or the feed line, you would not know this by checking out the unit. While in this case it turned out there was a shorted compressor, what if you spent an hour or more checking for a unit fault and found nothing. The vast majority of techs would surmise that the fault was heat/running related and try to fire the unit. If there were to be a fault in the line, you are back at square one and you would have spent all that time diagnosing for nothing.
This was helpful for me. Reminder to always check for shorts if you have a blown breaker.
We’ve got a 5t and a 15t Lennox package unit that have been on order since August, we were first given lead time of 16-22 weeks, now they are telling us we won’t get them till May sometime.
Smelling that burned fluids in pump sound like fan reply failure cause pump burn up because reply didnt stay in enable for long it just cut out
White stuff is sing of rust cause by moisture hot n cold mixed i seen them on all pump just normally
Thanks a lot sir
Ahh, a great Sunday started with Chris and "The Big Picture"; went thru withdrawals last Sunday w/ no video! LOL!
Big picture diagnosis master
Heh, as often as you have checked for these kinds of shorts in past vids, but never found them… I'm getting Dr. House flashbacks. "It's Lupus."
Short…..sweet……to the point.
Short and sweet diagnoses, lol Service area Barrhaven??
Thanks!