THE CARRIER PACKAGE UNIT IS NOT COOLING
ฝัง
- เผยแพร่เมื่อ 6 มี.ค. 2024
- First real no cooling call for this year, It was a fun call !
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Remember everyone, when Chris says "It just works.", it actually does.
lol, Thanks
as a european tech i REALLY dont like the "financial restraint" used with that 2 pole contactor instead of a normal 3 pole. for my sanity i am completly ignoring the open hot terminals. just shoving your hand in that electrical box by accident would probably kill you on the spot.
thats what u get when cost savings are more important then electrical safety or common sense
I had an old boss who did this on a new A/C install we were doing one time. He forgot to pull the disconnect for the condenser. Next thing that happens, he started pulling the high voltage wires off the contactor and shocked himself. Left a pretty nasty burn scar on his finger.
Best thing would be to rewire with a 3 pole contactor. An extra few dollars at most
Amen brother.
I've put 3 poles in a 2 pole spot as long as I could increase the rating.
If there is a problem after that, you''ll know fast.
For certain types of systems one pole must be energized continually.
Some even need a dedicated neutral to make it functional .
Duct renovations always get declined here on chain restaurants. It is very expensive and they see no return. I have seen the duct work hacked for years and you have semi ridged to flex and then to flex on renovations. Then the engineer said "have you balanced the A/C".... like how can we!!!!
The Five Rules of HVAC/R:
1. Airflow
2. Airflow
3. Airflow
4. Airflow
5. Airflow
#1 is smoke weed and drink beers
ugh if I could be a diagnostic hvac tech I would be in heaven. That was the best part of my generator mechanic job in the army just diagnosing and fixing stuff.
The contact points on that motor contactor / relay are made with nickel plated copper. Sanding bad contact points only exposes more of the soft copper. This will lead to a greater chance of the contact points welding together in the closed position. Don't do it! Just replace them!
exactly, the good contact material is only a thin layer of plating, once it pits and burns, it's game over for that contactor. never file or sand them, because the materials below can and will arc together and keep the compressor(device) running.
I work in IT, in South Wales (UK), and have nothing to do with HVAC hardware. Yet I'm watching all of your videos religiously. I think I just like the way you show and explain everything
I've been watching these videos for a couple years now. I also have nothing to do with HVAC, but I love seeing the problem solving and the walk through of diagnosing everything. Fantastic videos, easy to follow, and enlightening for stuff I can do as a regular consumer to make your guy's jobs easier.
Much appreciated
Hvac hardware.....
I'm just here for the comments 😂😂😂
If I lived in South Wales I'd watch anything to help forget I love in south Wales too😂
@@HVACRDUDE Hardware not the word? Greatest apologies in that case. Seemed like the right wording to me lol. Equipment more suitable?
You are such a nerd! Your thirst for knowledge fuels you! No doubt you have many interests. Love your videos.
This video could not have come at a better time. Just as i was getting nervous for ac season and package units. Your step by step walkthrough put me at ease.
I really enjoy your videos and watch them at every opportunity.
But most guys don't even do half of what you do... I'm really glad you can get more in-depth than field reality.
went from 991scfm to 1441scfm that's a pretty big difference
A long time ago I was attending a technical school in Germany. To pass one course we had to disassemble one contactor to single bits. Show the parts to the teacher, reassemble it and demonstrate in circuit that it's working again.
Air flow wise - you may not be able to make it perfect but you can certainly make it much better than it was.
This is why I believe the Desert States (California, Nevada, Arizona etc.) should require Contactors, Motors, Switches etc. should be installed in dust/sand resistant enclosures by Law...
Love that schrader depressor didnt know those existed, definitely getting one now
Sometimes washing the condenser coil brings the pressures even closer to freezing with low air flow situations
Ordered tools from true tech tools and used your code!
Thanks for the support!
Great Video. Thank you for sharing
Thank you for making and posting these videos. I greatly appreciate this . Much respect to you.
My pleasure!
Great video! I appriciate what you do here with your messages, good education! -Thank you!
Great video! I’ve seen the two pole contactor situation on 3 phase units for several years now in the SE market. I’m definitely used to it by now, and, most major manufacturers are doing it! Also, totally different subject, our company has installed and started up roughly 5 Trane Symbio split systems, what a pain in the ass!
In some of the older videos people made some really good suggestions about environmentally sealed contactors that weren't overly expensive. Can you please get some and try them out.. this has been a repeated issue for years on your channel. I'd love to see a big picture better fix :-)
They cost too much money and the customer would rather Replace the contactor every year or two than spend the big money on the totally sealed relays
Good work.
Great video man I work on carrier RTUs daily in Atlanta!
Great video
Thouse contacts are also plated so sanding/pitting on them also removes that so there now just copper points witch wont last at all.
It's 101° outside, at 7:30pm in Melbourne, Australia. HVAC techs will be working overtime today.
no it’s 38.3c
The existing contractor is 61755 which is a 40amp. It looks like someone swapped over the lugs to screws or removed the lugs. Either way it’s getting smoked badly lol
You Quickly become familiar with your Surroundings and Look for the obvious things first. 👍🙏
Great video and always very informative. I would recommend not placing equipment panels on roof but on top of equipment could damage roof. Much respect
Thanks
Welcome
i need to invest in a mini blower...currently used CO2 gas and when roping up they spin and twist and i feel sometimes itll drop at a given time
Customers may option to relocate to another building, rather than re-work of an existing buildings. (Especially if building space is leased).
Chris, funny thing is you post a video and I'm having to replace a failed contactor and capacitor on my carrier air conditioner aka condenser unit. Thankfully I keep parts on the shelf at home. And as you know I'm in I.t. not HVAC but I know enough to do basic repairs. Even put a new condenser fan motor and blade in. motor bearings sounded a bit rough. gotta keep the house cool here in Florida. even put a soft start on it. That way if I get knocked onto generator power it'll help with starting while running on emergency power. I've got a 20kw stand by generator and id rather not slug it too much with the inrush of both the main house system and my mini split for my home office in my garage.
Note*
Airflow is everything.
Like an airplane, airspeed is everything.
Could be dampers closed down, typically on engineered builds with ductwork installed properly per drawings, they will flow design cfm.
They got lucky the contactor didnt single phase the compressor
First, if possible, I would have replaced with a 3-pole contactor to prevent single phasing should a contact weld together. The compressor, as you know, has internal protection. Cost could not be that much more. Next, did you clean the return air grid if that is what it was. lastly, I hope you were back-flushing top to bottom. Good video.
A simple solution to prevent damage from a contactor that's going bad is a AFDD.
One of these Arc Fault Detections in front of the main switch or in between the main switch and the contactor could make wonders.
Thats a good idea, I might bring this up as a topic of discussion on my next live stream
@@HVACRVIDEOS Hi, Have you ever looked into using solid state contactors in the sandy environments since sand, dirt and the like cant contaminate them?
RCFA- are you part of Asset Management- Root Cause Failure Analysis
6:14 _starts coughing as you blow the dust_
I don't believe in sanding dn contactors period unless not in stock on truck causes issues dn the road. Nice that you cleab the unit, but did you catch the big rust spot on the U bend of the hx ? It may need to be addressed. Not to pick on ya but those edges of the fan housing are sharp could cut the roof membrane. Some restaurants pick a few nights out of a .24 of the yr to clean, and do updates, but have a High stipulation that work has to be done at a certain time, night or real early in am. Good work as usual keep going Big Picture 😂
I am still so confused how contactors are used over there. Over here in Europe we classify devices, casings, hoursings etc for the environment they should work in. Even for me working with less critical things it is important to use the correct things. We have IPXX on all of the things where the last X is for water and the first X is for dust etc. The first x, a 4 would make sure that anything larger than 1 mm can't get in. A 6 would be completely sealed from dust etc. That would keep the sand away. Shouldn't be hard to install the contactors with IP64.
nice another like
I wonder why you don't replace the 2 pole contactors with 3 pole ones? I get that oem does it because of cost but why don't you?
5:00 please tell me that you replaced the contactor with a 3 contact contactor and got rid of the non switched phase.
I didn't see if you test the fan motor amp if this consuming more amp or running low , maybe the speed of those fan can be changed , i think the Air flow issue is because the fan motor is was running low like a have to be .., the package was Cooling properly before so why to blame the duct ??
Sand them down 😂😂😂 they aren’t 12v points out of a car, they carry just a tad bit more amperage than that… I really hope there aren’t service techs doing that out there
Sometimes you just gotta get things going...
I raised my mask to cover the nose from blowing the dust out, then I realized that I was being paranoid lol..
Curious, couldn't you have adjusted the blower pulley in (while monitoring motor amperage) to increase your air volume? Is there a reason you didn't do this and/or mention it? Really enjoy ALL your videos and I'm asking because maybe there is a reason I'm not aware of as to why you didn't. I would do this quite often in the past when I had airflow issues, but I'm always open to why others maybe do something different than I do.
I will discuss this on my livestream this evening 6/3/24 @ 5:PM (pacific) come on over and check it out th-cam.com/users/liveso0bVDtjyLs
Being that the motor had an adjustable pulley, could that not be turned in once to speed up the fan? Making sure RLA isn't overcome... Higher CFM, higher suction temp, that kinda thing.
You can but you will increase static pressure and make the vents noisy
I learned cryogenics from two 70+ year olds in that shop that came to blows arguing about a system.
Holy hell!
🤣
Yup I almost yawned lol
Cleaning a unit like that every one to two years will dramatically prolong the life of the unit with far less breakdowns
If you just sand these contacts, it could work as emergency fix for a couple of days, but not more. If the coating on these contacts has been destroyed that badly, sanding it will not work for long time and you risk a sticking contactor (because the contacts can weld themselves to each other if you have a bad connection between them), causing further damage which can be very expensive to repair (like a single-phased burned compressor). It's not worth it.
Nice video, could you temporarily speed up the blower wheel until duck work is corrected? Also, what would be the ideal Delta T be for that unit? Thanks
No1 is fixing ducts bro 😂😂😂😂😂
Was not my question bro@@HVACRDUDE
Chris What is the part number of those Schrader cut offs you have?
Thinking back, it was sad yet hilarious watching two 70+ year old men trying to knock the others lights out arguing physics!
LMAO!🤣
Hang on at 9:10 did you casually defy gravity with your tablet?
I'm willing to bet it's all about ROI. If their ROI is less than 5 years, sure. They'll approve work. We had those issues when I worked for Whataburger. The ROI after the big wigs ran the numbers was like 10 years.
Typically it's 7 years in chain or franchise. A tax thing.
The Big Wigs don't like to invest in maintenance, like filter replacement, duct cleaning, air flow adjustment, belt replacement, cleaning the exhaust hoods, grease traps, cleaning the evap. and cond. coils, etc. They just like the profit line and defer all other cost unless they get breakdowns. They get what they can on warrantee work and let the other stuff go. That is why some restaurants have a bad reputation with health inspectors. The money counters no nothing about proper maintenance, only spreadsheets. @@halverde6373
Why not check the blower motor current if it is low air flow? It could be the wrong sheave size due to incorrect replacement. Wrong belt or sheave adjustment.
Agree totally, Don't always blame other issues until yours are fully correct.
Q. if you rotate the contactor 90°, would it have a longer life span in dusty environments?
No. Just increase the rating 10 or 20 amps at minimum.
What's the capsitor for in the blower?
why don't you uprate the contactors? when pulling a 30A out that failed wouldnt a 40A provide longer lifespan? or is it cost? good video
Because he wants the callbacks
No yawn, but I did try to remember the little genius's name from Symposium '24
Atley
That's what a customer won't see and never should.
Is that a core depressor or remover tool?? And if its a depressor you think it can help core from being stuck depressed?
How's the move to ios/ipados from android?
do they make solid-state contactors for these AC units?
yes
Get yourself the EGO 765 CFM battery powered leaf blower. Trust me.
Yep, you made me yawn🤣
Good job Chris.
Thanks!
I'm sure someone knows, but what program are you using on your tablet? Very nice information layout.
It’s called MeasureQuick
9/10 contactor failures I see is due to a failed load device, such as compressor, blower, etc.
Other times, it's bypassed circuit safeties that allows cooling when it's too cold out causing contactor chatter
Aren't there fully sealed contractors that could be used in sandy environments without the excessive failures?
They still can get fine sand in them
Vacuum-sealed contractors exist in other fields, they cost $20 more, so they must never, ever be used.
Ahh you can see they labeled where the magic smoke cartridge is stored. Must have blown it out before.
Stupid question, why is there a voltage drop of 211v across the one leg of the contactor wouldn't it show one leg at a time which would be 112?
I think because one phase is always connected (not switched) you are essentially measuring phase to phase through the motor winding. So it should be phase to phase voltage. Not phase to neutral/ground voltage.
I'm not an hvac guy, but am questioning why you used a 61345 contactor when the original was a 61755 ? As the amperage of the 61345 is 30/40 and the 61755 is 40/50 won't you potentially have issues in the future due to an under-amperage contactor ?
Chris showed the FLA as under 11.
more callbacks
Yes I yawned 😅
Guys I think I know where he is. I have a sneaking suspicion that he’s in the desert. I don’t know what could tick me off to this though.
Didn't yawn, just surprised. It's ok to be human!
Install a sealed contactor so no sand gets in.
I think he's said before that a majority of his customers don't wanna pay for the sealed ones and will just pay for a cheapie every 2 years
Vast majority of commercial companies will never authorize them.
Do they make hermetically sealed contactors?
I don't know about sealed mechanical ones. But you can get solid state contactors. No moving parts, but a quick look makes them appear a good bit more expensive than mechanical.
@@JK9579given the "fun" he has had with VFDs I suspect that the solid state contactors may not handle the "desert rooftop" environment well.
I believe he's said yes they do but they are substantially more expensive
They do, but they are 4x as expensive, and customers won't pay for it
Yes. They are called explosion proof.
Awful expensive.
Pinch a penny? Free a rat!
Anything other than water is jacking off.
Exception is a cooling tower.
286 thumbs uP
Carrier became total garbage about 30 years ago.
Before then they were the standard.
Always up contractor rating!
If it's not 40/50 amps you need your head examined or make your $ on callbacks.
Duct size is meaningless.
You put enough air pressure though it, you can cool a space with an inch and an eight ducting tube.
Trade off is noise .
No free lunch in physics.
You are correct. They make systems like that.
Yawn! Yes…yawning is contagious
Just remember, your wife could have thrown everything in the garbage but instead she chose to save everything 27:59
🥱
Yep, you made me Yawn :'D
You made me yawn about 1 minute later.
Ummmm
I thought I made you yawn...
Made me yawn lol
I made you yawn
you made me yawn
Yawn!
Simple diagnostic is increase the contact rating. Your failure beyond that will be obvious
Might include a fireball or explosion.
Old school .
How in the the hell did you think you got here without old school repairmen?
You'd die under the $hit we were pulled through by techs older than us!