HOT Kitchen HOT Women & Electrical Troubleshooting
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- čas přidán 18. 06. 2022
- The kitchen package AC unit had some serious electrical issues causing the women inside to become hot and upset. This Carrier cooling unit with electric heat has some different electrical wiring compared to a gas unit. The RTU was blowing fuses and tripping the main breaker. Watch me struggle to find the electrical issue. I finally get it... Will you catch it first.
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#hvacrsurvival #hvaclife #hvacservice #hvacr #refrigeration #troubleshooting - Zábava
Crazy. Nice narrowing it down. I keep learning from you to not give up. Thanks.
You can do it!👍👍
This one had me scratching my head as you went through it, then it all came together 😆
Great troubleshooting skills, Rick !
The new fuses are green so you know they're good!
🤣🤣👍👍
Glad you found the hidden burnt out wires,that one was tricky!good job!
Calls like that can definitely be a pain....but you did your due diligence and checked everything you could. Thats a difficult spot to find a short, the rest of the outter jackets of those wires looked in perfect condition. Can't say i could've done any better myself....so I'll say great job and thanks for the video.
Thanks man! I was about to go crazy..lol
Thanks for putting these videos out I am not in the HVAC Industry (RF Engineer). However these videos have helped me learn and even apply what I have seen to repair my own AC system. Mine failed ended up being a bad motor starter in the Middle of the night. It's very hot even at night in South Alabama! Thanks!
That's okay I was going into electronics repair and changed my major 3 months prior to starting at Devry. I had been through electronics in high school and tore things apart since I a kid
Nicely done Rick! Good catch
Awesome find definitely got the super tech badge this week
That took a while to find so not really 🤣
Good find! Sometimes cable tying wires together isn’t always a good thing. I see it in panels all the time
Gotta love the grind. Good find brother!
Nice find great video. They can’t all be easy that’s what makes it fun and interesting great job.
Thanks HVAC1!!
The drive and the melted wires are not a coincidence.
A tricky one for sure. Great fault-finding skills.
Great video, thank you, Rick.
👍👍🤜🤛
Wow! That is a eureka moment finding those wires all crispy like that for sure!
🤜🤛👍👍 If I'd of seen it sooner🤦🏻
You sounded so relieved you found that short. I know how frustrating that can be looking at everything with a fine comb and in the heat.
I made a few key mistakes in narrowing it down, the first one was to believe the maintenance guy checked the fuses correctly which I don't remember if I double checked them or not. Also Three phase motors have such low resistance it's hard to get an accurate indication of a shorted wire versus the motor resistance. The short was just barely touching the other wire and didn't show completely zeroed out, I had around one and a half ohm area
Awesome troubleshooting! Thank you so much.
Thats easy to miss the first go around good job
That is amazing work you did a good job! You had to be one heck of a detective to get that. Sherlock Holmes has nothing on you. Keep up the great work the world needs more like you!
🙏🙌👍👍😉
@@HVACRSurvival _Sherlock Holmes and the Curious Case of the Warsh and Poosh_
Great fault finding skills and video... the stress was agonising. At least you got it at the end ❄️
I was digging deeper and deeper, there wasn't much left🤦🏻😂
Great catch 👌 Rick
Very good work gotta keep digging that was a tough one
Next time you have a difficult one like this, pull all the fuses to isolate each line. This will make things much less confusing and you can measure phase to phase and each leg to ground without getting ohm readings from windings and transformers.
Hot day and you had a helper, lucky you. Good video,
Very seldom that happens.
Loving the sheer outrage upon discovery. That is so me lol. Great work as always 👍
I was so pissed about the dang fuses, I HATE FUSES. 🙌🤜🤛👍👍
@@HVACRSurvival Fuses are friends lol. Ah well, on to the next problem...
That would have made my head explode
3:15 nice song you got there lol
I called the problem but it didn't ohm out that way.
Good job Rick, Ducks in the Hood! I've been saving my money for the same megger, Good work again.
I got mine on eBay
Great job 👏👏👍👍👍
“that is some amazing stuff” 😂 once i heard of a guy who replaced a blower motor to find the trouble symptom had not changed after install. the guy who told me his story said the equipment owner was there watching the repair. realizing his mistake he had to play it cool and find the shorted wire and correct it with out showing his mis diagnosis…… 😊.
If I screw up I admit it and remedy the situation. I build trust with my customers so they trust me once they have me work on there equipment. We all make mistakes but how we deal with the mistake is what makes us a good tech in my oppion.
@@HVACRSurvival i was a good tech today. warranty on a Sunday holiday weekend. yay. totally my fault. owned it and ate it.
Integrity is something you can't buy. 👍👍
@@HVACRSurvival it something that sells though. word spreads
Good find
becarefull brother way you handling wires
We all miss things, those wires welding together was interesting. Typically I check all motors to ground, if I find none, I immediately start checking all high voltage wires. Most times i find shorts from rub outs between metal and or other things. I've seen wires melt together from grounds of a compressor, but never that.
If I also recall correctly, those small fuses are just to catch the VFD when it grounds out. If I bypass the VFD, I'll put the fuses in series with the motor.
Great video bro, nice find
Thanks for checking it out! 👍👍
Man you must have jumped in the air when you found the short , there's no such feeling besides finding a small leak nobody managed to find before !👍
It's a big relief when you find it
I work in a police/jail dept. One jail unit would go into free cooling mode even though the unit was not set up for it and disabled on board. Once in free cooling compressor locked out. Turning unit off then back on would reset it. Sometimes last a day sometimes a month. One day it went out twice. I reset it and stood next to unit. I could hear a short. Fan stopped and went into reverse, shut unit off and system went into free cooling. Found a wire that went underneath housing that had tiny rub mark in it. When wire would get hot it would droop and hit deck causing problem. Had to remove fan to pull wire out enough to repair. Finding that ended an almost 2 season nightmare.
Thanks for sharing, those are the kind of calls that will kick your butt 👍👍
Great job.
Great find lot work to finely find the hidden gem always seems to Be the last place we look lol
I know🤦🏻
holy fudge. I blame the ZAP STRAPs smashing the wire together (never mind the undersized chinesium wire that melted together)
I'm going to guess it single phased and the remaining pair cooked the junk over-fused(for start current) and undersized wiring.
Your correct, there was no reason other than looks to have it there and they were border line capacity wires. CHEAP AS CARRIER thanks to all the OTHER CHEAP ass company's racing to the bottom of quality.
Sign in front of a hotel say’s “If your wife’s hot, our AC works”
😂🤣👍👍
What you hit is one of the reason why I dislike people using tie-wraps the way they do. "Let's make sure nothing can move *yank*" I prefer using velcro ties, and when I use tie wraps, I keep them reasonably loose so the wires can move through the loop. What I think happened is almost what you suggested, except that they wrapped those wires tight enough that they were compressing against each other. That reduces insulation thickness, and any softening from heat means they'll draw towards each other. Next thing you know, they start to merge, slowly.
Found some more "new" equipment to work on. You must be living right! Makes you wonder about that VFD.
Glad you are liking the Probe Master leads. Shannon I wear my sunglasses at night told me about them! Happy Father’s Day
Thanks brother Joe! There awesome, as you noticed, I cut them shields like you said 👍👍
@@HVACRSurvival I did notice that brother Rick!
😂🙏🙏
Geat job I would of added a contacor so the blower wouldnt stay working all the time
"It is but it aint" Solved by your thinking.
Good job bro like always
Thanks man!
🇺🇸💪👍❄🙏 great troubleshooting skills. U the man!! Thanks for sharing 👍🏼
The good practice is to put the fuses in line with overload protection paired up to a contractor to protect motor from burning in case of contacts welding up.
But I’ve never seen anything but bi-metallic disc thermal overloads on anything pertaining to that size of the A/C units.
Most of the time fuses protect the wiring and not motors or heaters. That’s why fuses must be selected to a conductor ampacity rating, the only thing you can do for things with in-rush ( like motors and transformers) is install the time delay/slow burn fuses.
The fuse that are exceeded the conductor ampacity was probably selected because of motors start up in rush and they were instant burn fuses, NEC allows selecting no higher than 250% of motors FLA, but - it is for the motor protected with overload protection!
Thanks for sharing Commenter! Sounds legit to me.
The blower motor did have overload protection - inside the VFD. Unfortunately when that gets removed no one bothers to replace it with a motor starter.
@@mrfrenzy. As usual! 😁
Do you think that maybe they figured that the motor's starting amperage would be less due to it being designed with a VFD?
It could have been but the total amps was mid to top 40 amp area with the drive removed and both compressors running.
Those drives on Carrier's are soft starters with 2 set frequencies programed in. Y1 and G is 40hz. Y2,W1&2 are 60hz.
How in the world did you spot that shorted wire ... It was so camouflaged ... Great troubleshooting ... Thx for sharing cause it'll show the youngens how to do it ...
Normally I would have picked up on it sooner, that's the first time I've seen it on that unit, I will be looking for it from here on out.
Happy Father's day to you Rick
Thanks man! Same to you if your a dad!
@@HVACRSurvival yes I have a son same birthday
Sweet dude.
I see a recall!!
I don’t know why it seems like that Bryant and Carrie has this problem with all the other brands out there using the same drives, if it was just me or is anyone else finding the.same on going problems great video Rick
That was a smaller drive than what they first started using. I don't know if that's only because it was a smaller system? You can't tell me putting that drive inside that box where the cold damp air is pulled across it is good for it. Not to mention all the dirt. It's a shit design 😁
Yes sir that is the only thing that I have come up with that is different from all the other drive’s being used
You measured ohms to ground for a dead short at the beginning, you should also measure the ohms between the phases so you catch a phase-to-phase short. With all the contactors open you should measure maybe 10-30 ohms from just the transformers, but with the phase short you would have seen less than 1 ohm on one pair. I think you were locked into thinking it had to be a short to ground like it is most of the time. Thanks for posting.
Three phase compressors can run 0.5ohms at times. I forget what I measured but I believe I did check that. I stuttered the video in the beginning if you caught that to acknowledge the possibility of a winding to winding short.
Without an LCR meter, you cannot tell between windings and a phase to phase short. I check transformers by measuring the inductance, not sure if motor manufacturers publish that.
@@liam3284 Yes, you can because the compressor contractors are open when off and the windings are out of the circuit.The transformers have a high enough resistance you can tell the difference between them and a short. Easy enough to disconnect them if you still have doubts.
thats what do we call sureballing if one section dies then that section is the problem
Electrical problems can be time consuming and hard to find. That's how it is being a technician. Many customers do not know what it takes to diagnose an electrical issue. Time.
Very true🤜🤛👍👍
You are right
That unit had more fuses than I've ever seen in a single unit did they have everything separated into different circut boxes or something I couldn't tell alot by the video I'm just trying to think I'm my mind what was going on with all the fuses.Thanks for the video
They were there to protect the individual wires that feed the elements.
Visual inspections are important.
how offten do you come across these newer units that have vfds, and the vdf is blown up
To many.
@@HVACRSurvival wouldn’t you think they would put that vfd in like the electrical room and not the unit it’s self where it’s exposed to humidity, and varying temps
That would require more install work. Installers didn't even hook up a UV light on the new install change out, what do you think would happen if they shipped a drive unhooked? It wouldn't get installed. This is the battle we face between install and service.
@@HVACRSurvival yeah true
What brand/model are the new test leads?
I will need to look that up
The code allows for lighter wire in a unit. It's not heavy enough a lot of the time
That doesn't surprise me. It should run an industry standard across the board. 6 gauge for 60 amps, 8 for 50a and 10 for 30 a. But what do I know 😉
@@HVACRSurvival I agree. Wire shouldn't be smaller in a unit because of some stupid code that allows for wire that's to small
Loose factory screw terminals?
They were a little loose but not extremely loose. I really doubt that the wire was 6 gauge.
👍
fun fact: the reason VFD's in america break so often is because they are undersized and run too hot and blow up. most desiners take the upper limit as continuous rating.
What country are you in?
@@HVACRSurvival i mostly work in the netherlands and belgum (in the socialistic hellscape called europe) on industrial chillers wich all have VFD's these days or are converted to VFD. non VFD compressors and fan based systems are bascially a non starter for any new system built in the past 10 years there. even apprentices only see fixed speed systems on 20+ year old installations or in class to learn the basics. building codes and energy efficency laws basically made single speed systems unsellable. everything is VFD here any hardly never break because they are specced correctly with enough margin for error and placed properly. our ABB and schneider rep my company uses is from cali and 80%+ of the failliures he has seen in the US is simply because the manufacturer of the unit undersized it for the conditions its in just to try and save a buck and basically gamble on the idea that its fine as long as it survives the warranty period, after that it aint their problem anymore.
@@SupremeRuleroftheWorld that drive is the ACS550 i believe or its the ACS320. In carrier units. 320 is supposed to be rated at .5 to 30hp.
@@jasonjohnsonHVAC under what conditions? No way that unit will do 30hp sustained in desert conditions. Most units have significant deratings when it comes to temperture, humidity, altitude and incoming voltage and current and motor voltage just to name a few. Most equipment manufacurers dont look at those or usually just ignore them and ride the warranty wave and hope it lasts a season.
@@jasonjohnsonHVAC the 320 can be ordered 0.5 HP up to 30 HP. Not that every 320 is rated 0.5 to 30. The user manual applies to all HP ranges.
302 thumbs up
click bait! haha
Dude, everything Carrier is crap in my opinion.
Every thing made nowadays is junk,scam artist,you're going to make something, make quality.
Yep, do it right or don't do it at all👍👍
No Hot Women
They were in the kitchen and they were hot.