BAR AC KEEP'S TRIPPING THE BREAKER
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- Опубликовано: 1 авг 2020
- The customer asked me to figure out why the main breaker for their bar ac kept tripping now I never found the exact cause of the issue but I found a bunch of things could could have been the potential problems...
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It's good that you leave in the mistakes (I do too). So many technical channels edit them out. It's good to show that everyone makes mistakes and has little "incidents" at work.
I agree!! Thanks for watching Clive
OMG YOURE HERE. And this was only 2 days ago. Both of you have great videos.
Thanks bud!
Ought to take that spare fuse and install it in the alligator clips.
Big clive? What are you doing here?
I like that you don’t edit out your mistakes. I show your videos every other Friday at our meeting. 👍🏼
I dont see the point because we all make them.... thats how we learn, thanks so much for the nice words and thanks for watching!!
chad darr hell yeah! Gosh I hate when that jumper falls off
From showing mistakes you really learn.
Looking at the fuses you took out, one was a different brand... that gives me an idea.
I propse that one of the previous problems took out two fuses. One of the fan motors and both compressors have been replaced, surely one of the three took out some fuses in the process. This stresses all three fuses, the two weakest ones blow. Someone comes along, replaces the motor, replaces the two fuses that are blown, leaves the one that still measures good.
That third fuse was also stressed, but not replaced. Over time, through just normal operation, that one finally goes. Now you have a missing phase, and we all know what happens when you try to run a 3-phase motor with one phase missing. The breaker trips. The customer resets it, and the board does all of its initialization crap, which takes a few minutes. When the board is done deciding whether or not it is still an air conditioner, it tries to energize some motors, with a phase missing, and the breaker trips again. Customer report: "I reset the breaker and a few minutes later it trips again."
So you've walked up to a unit that doesn't actually have a currently-existing electrical problem, other than a missing phase, caused by a fuse that blew under "normal" conditions having been weakened by a previous fault.
just a theory.
Certainly possible.
It would be interesting to see the discrimination/coordination between those fuses and the breaker though. We saw the breaker was tripping first in this instance with the locked rotors/single phasing. Would the fuses have gone first in a sustained overload or dead short? Probably the latter.
I love your theory, especially the "deciding if it's still an air conditioner" part lol, but I will also suggest that sometimes fuses fail, possibly due to manufacturing defects causing it to overheat, or corrosion causing overheating, or sometimes due to mechanical fatigue from the vibration.
If you open the fuse, you can tell the difference between a hard fault and a mechanical failure, and at least tell something about the fault that caused it.
Perhaps a theory but in my days as a tech (computer nerd now) we saw that kind of behaviour often enough on 415V three phase that it was standard practice to replace them in sets (Euro & Australasian 50Hz work)
but it could have been the one fuse replaced and not the other two! maybe brownout/phase loss, short outage and no delay to turn on or simply upstream internal building wiring issues. something in the breaker panel overheating and causing tripping, which they reset too often. guessing game unless you can catch the issue or inspect it all, sometimes asking the customer or who was there if there was an weird power issues works :)
@@ke6gwf good suggestion, fuse guts are messy, so be prepared ;)
Who else was excited when he said the customer approved the work...more video!
Those are pleasant words whenever you are working!!
bigpardon 👍🏼
One reason I’m getting into commercial. You’ll always have work.
@@gregmercil3968 More importantly, your customer will always have the money to pay...
@@LMSILVIA s0
Chris, I do assessments on facilities across the country which includes HVACR. You are always cleaning up garbage and making it right which is refreshing to see and I loved that you got rid of that plastic pulley on the blower.
All that being said I see hackers a lot and it is uplifting to see someone getting it right.
Pride in Craftsmanship...don't see enough of it.
One of the most difficult things to teach any technician is how to question and walk back their assumptions. Most people respond to "I don't know what's going on" by shotgunning solutions (I call this "flailing at the problem"), which usually leads to incorrect or half-solutions to problems because the problem solving usually stops at the first thing that seems to change the behavior.
My response to flailing at problems is to remind technicians that when the world fails to make sense, they have failed to have the correct assumptions about how the world works. This is why when I teach troubleshooting theory, I always require my students to understand the system and have a testable hypothesis for the problem mechanism before they make any changes.
It was very nice to watch you make mistakes and walk back your assumptions when the problem no longer made sense. That's not something that is easy to do because it requires much more mental effort than flailing. Good work. :)
I'm an electrician and at one time a friend of mine who's a dentist called me and he had a problem that the fuses were blowing out so he asked me if he could put the next size amp fuses on the A/C unit so I said no you can't do that so I went over to check the problem and the A/C guy replaced the compressor but he put a bigger compressor so the unit was overloading the fuses I told my buddy that he had 2 options to put the correct compressor or rewire and replace the fuse disconnect box so he decided to rewire and I've done A/C electrical work repairs because the lack of experience in the electrical safety and all the time A/C techs tend to do a short cut but they end up creating a huge problem and I hate that. Good video keep up the good work and have an excellent day.
FYI: I realize guys do all the time, but you don’t have the PPE to be pushing on those disconnect knives with it energized, even with an insulated screwdriver. I enjoy your videos and would not want to see you get hurt.
Arc flash potential. 👍🏻
You’re right. It does rarely happen. I worked with a guy who it happened to. It was 480v. His hand looked like an overcooked hotdog.
I wish there were techs like you where I worked when I got out of hvac school. Super informational and break it down so we understand. The techs where I worked didn't care and acted like I was less then them and not worth the time. Which killed my drive to work commercial/industrial or for another company for that matter. Guys like you really help us new guys out. Thanks man!
I'm not an HVAC guy, but I'm glad that across all the trades, those who do care are more than willing to clean up the spaghetti. I work with low voltage security hardware and if I need to put my meter up to something, it definitely helps that I can see the where everything goes. Great videos as always.
I like the fact that when you are wrong, you own up to it and move forward. There are many people who are stubborn and won’t admit their own faults. I’m sure there are also technicians that would just replace a blown fuse and call it a day. I really like your troubleshooting skills and persistence that usually pays off in the end!
this.
When the boss goes out to the job you left & proceeds to talk to himself for an hour about the unit while literally getting nothing done. I am kidding bro! I love the content & the explanations along the way. P.S. I am ordering a shirt!
Ha thanks bud, talking to myself is nothing new, adding the camera to the mix just makes me seem a little less crazy
@@HVACRVIDEOS if you start having a 5 way conversation with your self let me know and i will send your membership certificate to the crazy club :) Btw yes i have done that. I routinely have 3 way verbal conversations with my self 5 way requires 2 in my head 🙃
@@HVACRVIDEOS There is nothing wrong with talking to yourself...
After all, how else are you going to have an Intelligent Conversation...
@@demonknight7965 Multi-way conversations with your selves isn't the problem...
Having an Argument with yourselves and LOOSING is the problem...
@@HappilyHomicidalHooligan so true
Famous last words "I haven't test power yet, it should be off cause the breakers off"
Lmao
Kinda like "well i hope this doesn't blow up" i keep expecting a loud bang and smoke from something
@@demonknight7965 ya gotta remember, to be a top notch HVAC dude ya never let the smoke out.
ElectroBoom Approves of this message.
I had a compressor panel that still had a phase live when the isolator was off. The isolator had failed internally.
i love the extra long videos
That's what she said! 😂😭
Same!
Sir I proud of your job I like your job sir can I attend your job and your company please tell me I want to join your job and you company please I am from Bangladesh and I am normal technician me but I think I can do better please forgive me turns I want to job with you thank you sir
You know you love ac when you do a 12 hour day in south Florida and watch 40 Mins of ac troubleshooting as soon as you get home. Great videos
Gotta tell ya, it´s somehow therapeutic to me to watch your videos, I can sit for hours watching you explain and fix stuff.. Thanks and keep on the good job
Thanks so much! I will be going live on RUclips this evening 1/18/21 @ 5:PM (pacific) to discuss my recent uploads and answer questions from RUclips comments, the Live Chat and emails, come over and check it out. ruclips.net/video/donStSxMDe8/видео.html
I really like that you don't remove your mistakes in the video, it really shows that in every work we will have minor mistakes....
Man ,every time I watch your videos I learn something, like that dirty IBW was making that shaking, your the MAN.
You have the some of the best service call videos.
Thanks for everything including showing your mistakes. These mistakes are a blessing for us young techs fresh out of school.
It's always nice to watch a tech who knows what he is doing.
The best thing on RUclips: good educational videos, that are also entertaining. Keep up the Great work.. ! Vince
Also: keep up the grunt work.
I've always been curious of HVAC work, I;ve worked in alot of various skilled trades but never this work, Ive learned a lot about it from this channel alone
"Ok so I screwed everything up, well that's fine."
I'm a software engineer and I sometimes submit code, see reviews, and think the same thing hahaha!
now try being an end user or technician that has to deal with both your broken software and the electrical wiring/electronic design failures.... add in mechanical issues for a triple headache
I really appreciate the fact that you went through the troubleshooting process of trying to figure out why the fuse blew instead of just replacing it. I know too many people that would just replace the fuse and call it good with no thought about the cause, just so that they can get the job done quickly and get paid. Super Awesome videos, I found the channel a few weeks back, and it goes great with the mechanical engineering and thermodynamics classes I am taking currently. Keep up the awesome content!
I start HVAC residential school in 2 weeks, all because of you my man, the impact you’ve had is tremendous, love from Myrtle Beach
Awesome bud!!
HVACR VIDEOS I’ll be watching you every step of the way!
2:05am in Singapore and I am lucky to have watched your video and entered the contest! Managed to learn lots of stuffs in your channel! I just wish there are more competent techs out here in Singapore to do maintenance on our AC Units.
We have all done that Chris. I have been a repairman 49 years and I don't know 5 fellow repairmen that are as thorough and conscientious as you are. (AND or as knowledgeable).
Very nice. There's no sweat leaving small mistakes in a video, and showing them getting corrected. That's great information for those learning how to troubleshoot. Knowing a problem was a small mistake made during troubleshooting versus a preexisting problem is very important. It's real-world documentation!
Your wiring job at the end looked nice to me; even if I hadn't seen how it started. It's so satisfying to see something go from almost scrap; to having a new lease on life.
As for the 'little bit high' discharge temps there at the end, I have a feeling that the gap around the cover (while it was just leaned up against the housing) was letting quite a bit of air bypass the condensers. Probably once that was completely buttoned up, the pressure was lower.
I like watching your videos when it’s electrical issue, electrical is my struggle but watching you trouble shoot improves my skills.
low voltage "spark spark" gave me a good laugh anyway, I hate when I do stuff like that lol.
Looks like a hot day in mo val ....
My Monday customer is about 2 blocks from where you were , and yes past few weeks have been brutal !!
Stay hydrated Chris !
Thank God you sorted out that wiring. It looked shocking. Literally!
Good Day to you Chris. Name is Kyle and I watch your videos all the time. I work for the military and my shop consists of 4 people. We are responsible for roughly 400 AC units plus many other things on the base. When ever we run into trouble and get stumped I always try to find a video of yours to help us move forward with ideas. I also watch them at night sometimes just to better sharpen my troubleshooting and repair. You are making a difference on my end and I’m sure you are helping many other techs out in the field. Have a great day.
Wow thanks so much bud and thanks for supporting the channel with the merch order!!
how come im addicted to watching your videos and this is not my trade , i install sound and lighting in bars and clubs . your work is good keep it up
No bushing on the Blower motor coupled with vibration = wear thru on the wires
the insulation on the wires going into that motor didn't look that great indeed.
Yeah no bushing? I'm with you on this one.
Going by the 2013 written on the blower motor, this unit is at least 7-8 yrs old, probably a 10 ton. With all the problems this unit has, it is a prime candidate for replacement soon anyway. We get about 10yrs out of a unit like this here in S.Fla. I know restaurant owners can be cheap at times, and take the less expensive routes, been there done that kind of thing. Good to see you were approved, and are gong to attempt to make it right.
Your videos as been a huge help for me as a new technician
I love watching your videos. I am from Philippines and currently I am working as Chiller/ HVAC technician in Saudi Arabia.
I am not an HVAC pro at all, but I watched this whole video. You do an excellent kob on these videos. Really outstanding. I make video for a living.
Thanks bud
That was a spider web of issues to come across , starting with the mystery blown fuse . Glad your customer chose your plan to correct those issues , the out come look nice an professional .
great, honest and extensive work, not leaving tiny things out because "you could" big ups
5:45am in Hawaii and I’m watching your vids.🤙🏽
Great job doing the instructional video on this unit. The focus on the unit disconnect was excellent. Sometimes techs do not realize that those fuses in the disconnect will open if they get hot due to a loose fuse holder, worn spade, etc.. Also, out here on the East coast with our colder temps, not having the economizer or some type of low ambient kit can cause nuisance trips of the clo board requiring a manual reset. What generally happens is that on a call for cooling with cooler outside ambient temps, the suction pressure will nosedive initially causing the clo to lock out on low pressure. A delay on break across the LP switch with prevent this. Also, head pressure controllers on condenser fans may be required if unit is to be used for cooling with low ambient conditions to prevent the clo from locking out. If fuses continue to blow, a phase monitor may solve the problem. As you know, with a fan speed controller, ball bearing condenser motors are highly recommended due to fans shaft oiling issues at low speeds with bushings instead of bearings. I think this unit will need economizer/low ambient as it is a bar unit and it will run at night, year round. Maybe not in California temps. I had to self train on this model unit, I didn’t have your videos? Ha,ha,ha!
Great video as always ,really informative as usual, hope your staying safe and well during the Corona crap, I'm thinking of going in to the HVAC Industry, my brother in law does the controls side of stuff such as trend, deals with the AHUs etc that wiring is a rat's nest ,.stay safe and another great video from yourself
thank you for making your videos i find them enjoyable and informing.
Great video. Thank you for talking us through the Electrical. No discussion of a giveaway at the end. Thank you for this great video!.
Nice Job! Looks a lot better and I agree with getting rid of the wire nuts. Thoroughly done over 👌
Your videos are awesome, maybe after some time watching your videos I’ll become a master tech in restaurant equipment ❤️🙌🏽
Damn. Never considered that amp draw difference with the fan cabinet door closed. Glad I watched this.
Great contest for a solid valuable piece of equipment!
Sunday morning coffee and an HVACR video, Nice!
Was just saying the same thing!
For me Sunday morning waffle house in the middle of a hurricane
Really appreciate the non-editing. That’s the only way we learn, thank you for sharing!!
Nice video and Great problem-solving and figuring out the problem
Looks much better so good to watch you thanks for sharing
Awesome work and thanks for the great content stay safe and take care
Nice job on a very hot day. I was always told to only run wiring at 70% of its rated capacity. I always hated to fix other peoples mess ups. Thanks for the video.
I'm not an electrician, I don't work in hvac or refrigeration but I really enjoy your videos!
I was told by an electrical engineer that those type of fuses were meant to be mounted flat because the fuse part inside is surrounded by sand keeping that from down grading overtime from the heat. Build up created from the electricity going thru it! What happens when the fuse is mounted up right is over time the sand inside compacts from vibration leaving the metal fuse part inside with no sand covering it to absorb the heat causing it to eventually melt and burn through opening up! That is why many times a fuse will blow for no apparent reason ! So that can be the conclusion after you trouble shoot and find nothing wrong! The repairs that you made were good but it would be nice to get rid of the excessive amount of vibration! Awesome video ! thanks!
These are excellent. Thanks for posting.
In my home town of Moreno Valley I see the Big M in the on the mountain, great video by the way I’m an apprentice and this video really helps out.
Every time I come across the "No Bushing" and in my head I say, "Bushing, I don't need no bushing..." and I climb down and grab a strain relief and put it on, that's my pet peeve, much like your contactor face being upright
Excellent job, this one was a mess. I would have loved to work that one. I know this doesn’t apply necessarily to service but when I worked as Mechanical foreman on a 7 story hotel new construction the inspector loved seeing clean wiring jobs. Makes for an easy green sticker and continuing the work flow. First one done with their punch list wins, lol.
Love the videos. Always watch to the end!!
Got hats ordered. Love your videos.
Good job.... I was and engineering tech for over 27 years.... I use to chase my tail trying to figure out why a fuse blew. Sometimes I just had to resign myself to believing that the fuse just blew and it was really just a faulty fuse.
Just got my HVACR hats in mail today! Great hats n product! Thanks for the quick delivery man! Love them 👍. Time for some shirts lol
Thanks so so much for the support!!!
@@HVACRVIDEOS thank you for the videos man. Keep up the great work 👍
I enjoy your videos. Not an hvac tech but i am an electrician. Agood habit to get into is to hook your jumper to the load first then the power. This will keep you from shorting the lead against a ground when working.
Great job! I like that fieldpiece meter.
I your videos, i find your work fascinating. Thanks!
Its amazing how that little fuse blowing out prevented the entire thing from starting. The moment you plugged in the new one it all of a sudden started
That is a lot of hot,hard work to keep others cool. Great job!
I’m betting the fuse was blowing because of the second condenser fan motor was sitting outside/too low in the shroud and caused high head pressure on the wrong size compressors. What a mess you had! Great work!
I was watching a lot of board level repairs from Louis Rossmann. Its pretty much the same technique just on a much smaller scale. It's interesting to see how you can repair the units with oem or aftermarket parts and even have schematics right on the door. He is fighting for the right to repair bill for consumer electronics.
Love the video mate. Been watching them and really enjoy them. Would be great to get my hands on some merch but unfortunately you dont ship to australia, yet. I do residental work in australia but love the content and videos. Keep up the great work.
Nice video. Cant wait for my hat! 6 gauge is the standard for 60 amp circuits by me.
Wiring and everything looks 1,000 times better great job!
Sweet got a grey shirt with only 6 left. Big boy 2XL awesome, thanks for the gear.
lol 😆 when I seen that spark ⚡️ I thought it was over great video
This is just a really good video learned a crap ton.
Great job and video
that snake's nest wiring. i've opened a panel to this, and first response is "wtf??", then, "i need a beer". had one where my own tech connected everything inside a 2" diameter ball make from rubber tape. from what i heard, he works for oscar-meyer now.
You are welcome, you are probably the only business that can keep going on without being infected due to being out in the open air. Like others have said look after your self, family and employees.
Another awesome job !
Awesome work! I feel like you went over pretty much everything on this rtu.
Such a good job done here, the unit needed it
my favorite moment is when you used the fuse puller to push the fuse in.. then used your hands... then went back to the fuse puller! like running behind a door with no walls around it to hide from a bear :D made me laugh i do this stuff all the time! love the vids! last time i had some fun we hit the breaker and had no volatage and at somepoint we had hit the wire and with the breaker being slightly broken the wire caught power and i went to remove the wire and fwoomped myself! didnt get hit but its been a while since iv emoved that quickly! had an electrician out that day to rewire the whole high volt for the main unit! ALWAYS CHECK VOLTAGE!!! had a guy somehow remove all of his disconnect cases from their respective places without hitting the breakers... to this day i pride that kid in how detailed he is!.. (was new and inexperienced so trust me when i say it was pure luck he didnt catch a fwoomp!) he didnt blow any breakers or catch any sparks! talk about careful worker! LOL
Always check the motor amps and be careful setting the variable pulley up similar to the existing one that was on the unit as it could have been set up wrong from the start. 👍keep the vids coming
That unit had a spaghetti mess of wiring at the beginning. I like that you took the time to make it better than what it was.
I can see that the RUN CAP BANDIT hooked up that fan capacitor. LOL
Yep
😅 it must be a terrifying feeling every time you flip that switch. “Hopefully nothing blows up” 🤞😂
Nice job,fixing a screwed up mess . There’s a lot of units like that out there . I’d like to see you explain economizers some time .
i am a tech..i am doing every day this job... good videos...
I love these videos
Good video Chris . Condenser fan motor on the right side looked a bit slower than the aftermarket. Unless the OEM was an 875 RPM motor , and the Aftermarket a 1075 RPM .
Loved your work .from Saudia Arabia....
All I can say is thanks Chris!
I just subscribed, great video...
'I think I did everything right' -What you love to hear as a customer 😂
I do hope the fuse size was point out to read thats almost as bad as upside down contactor name plates. Good catch on blower wheel packed. Respect for going OEM
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