MINI SPLIT Parts Explained! Understand What They Do!

[@acservicetechchannel]

Mini Split Book on Our Website- www.acservicetech.com/mini-split-book Mini Split Book on Amazon- amzn.to/3ytHJSs Mini Split Book on TruTech Tools- www.trutechtools.com/BooksGuides Mini Split E-Book on Google- play.google.com/store/books/details?id=HN-iEAAAQBAJ Mini Split E-Book on Apple- books.apple.com/us/book/id6445178399

[@robbyrogillio1052]

Great video man! Where can I purchase one of those open end torque wrenches? Thank you!

[@mdrajibislam6786]

Why Compressor discharge line keep u bent? Please answer.

[@boomcity4942]

I was in the HVAC industry for over fifty years and earned the right to be a grumpy old man. I usually am critical when watching technical videos, but my hat is off to you. This video is excellent. Your explanation and examples are outstanding. Thank you!

[@RediTtora]

Yeah that's great now if only they would give you a manual online for where you can locate this stuff.

[@miketonon7946]

Is it practical to try to heat a 1300 sq ft house with only a mini split system or would it be too expensive. Temperature varies from about 0-100F

[@spelunkerd]

That's a jaw dropping explanation, no less than brilliant teaching.

[@acservicetechchannel]

So glad that you thoroughly enjoyed it!

[@kgl4270]

Mate I've not a clue in hell about electricity and refrigeration.. This is a top notch breakdown on aircons and how all the parts interact with each other throughout. Thankyou so much.. alot can be learnt from this.

[@johnschwarz8144]

This is the best breakdown video on a mini split that I have seen to date. The cut outs on the components were excellent. Very well done ! Thank you.

[@InspiredScience]

Hands-down agree. I haven't seen anything else come close. Truly a professional, very well-thought, accurate and thorough overview. Thank you Craig!

[@ColinPopoviciu]

agree

[@ThisIsNotAVideo]

I agree it is the best. I would like to understand more of the design behind the accumulator, though.

[@juansolito1986]

😢

[@nuc2726]

I'm an HVAC tech. This video has some very important information for me that I have learned from. A lot of these components are the same on a regular Split-System HVAC system too. It's so cool how, no matter what cooling system you're working on, be it a window unit, a package unit, a split system, a mini split system, or even a refrigerator, the same basic compression, cond coil, metering device, evap coil loop is present in all of them.

[@acservicetechchannel]

Absolutely, Thanks!!

[@douglasshackett8747]

Top notch! Thank you...

[@mastertech9680]

You are right but simpler the better, these systems have too many things to go wrong. LG and Samsung Refrigerators are nothing but nightmare. I have not seen many techs troubleshooting and repairing Inverter system fridges.

[@JohnHoranzy]

@@mastertech9680 I think the those are unnecessary features added to boost the margin. Every little feature in the split is necessary. Lots of technology in these.

[@vijayanathanstephen9308]

No one had explained the way you have explained ! And I think your videos are the best so far ! Keep it up !

[@acservicetechchannel]

Thank you so much! I am glad they are helpful!

[@LuisC202]

This is the BEST Hvac Teacher/Instructor on KZbin.

[@brandonwoods705]

I dont comment often, but this man is a legend. That was high quality information condensed down to about the minimum it could be.

[@TampaTec]

17:31 this is my issue. Thanks for sharing. 👍

[@JohnHoranzy]

Very well done!. These things are not my $80 Wal-Mart Window air conditioner with a reversing valve. Thanks for explaining the purpose of using the inverters for motor control.

[@69dblcab]

This video may be two years old but is of great quality and full of good and concise knowledge. Thank you.

[@keepthinking2666]

Of over 20 years do an air conditioning and three different colleges for HVAC and multiple certification classes from different compressor manufacturers this was by for the greatest educational video ever made for mini split systems. When I first started to switch over from commercial to do more residential I was never comfortable looking or working on mini splits because I was so confused even when I took the Mitsubishi class it was an entire day 8 hour class that could not even compare to 5 minutes of this video

[@acservicetechchannel]

Thank you so much for your encouragement about our videos!!!

[@moisesc4731]

Why you don’t open a HVAC School?

[@johnbailey9716]

By far the best explanation of these units I have seen. Thanks

[@djpaulk]

I'm a commercial Fridgy, 30+yrs experience. Your explanation in less than 20 minutes was almost flawless. Beats any TAFE teacher i had. There are too many people who are clogging this utube up with crap. But you are one of the few who doesn't. You sir, should teach apprentices at a technical college! Excellent vids. Paul from Oz

[@acservicetechchannel]

I'm so glad to hear you appreciate what we are trying to do, thanks and means a lot!

[@halledwardb]

Yes I have to say, Craig is better than the school I'm in now. Craig should run some for of academy. He already does, but maybe something with a piece of paper attached to it.

[@jonathanteller6550]

I have a minisplit that works great in heat mode but only blows ambient in cooling mode. Do you think I have a bad pilot solonoid?

[@andrewlopin5247]

*Works great **Fastly.Cool** compact and Easy to install*

[@boomcity4942]

I am installing two mini splits on my home. i have 50 yours of experience in the HVAC industry including over 20 years in building automation. You just taught me a lot. You’re an excellent teacher and a credit to the industry. 🙏

[@gadgethunter5732]

all the new hvac students should be getting 100% after watching your videos.

[@PhoenixWard-c3z]

That's a jaw dropping explanation, no less than brilliant teaching.. That's a jaw dropping explanation, no less than brilliant teaching..

[@acservicetechchannel]

Wow, thanks for the high praise!

[@gyenisattila1069]

Köszönet a kiváló szemléletes, és érthető bemutatóért, nagyon hasznos volt! Sajnos az iskolákban sokszor, nincsenek ilyen jó bemutatók.

[@camiloramirez3367]

You're the real HVAC GOD, Mr. No more to say than, thank you.

[@DF11G]

Well done, thank you so much, all those cut sections are ice on the cake.

[@BrokeYuppie718]

This guy really really knows this profession intimately I’ll definitely hire him hands down wish he was in NYC

[@ErsinGokay]

Thank you for sharing the information with the interested audience. This is very detailed and informative video on the mini splits. Thank you once again for taking the time to create and share this video. God bless you.

[@SirGicano]

Thanks! Nice cut-away component views. Direct to the point explanation.

[@davidhunt4291]

I am the jerk that gives so many presenters a hard time so when I tell you that I'm impressed you can believe it matters. It is so nice to have someone that knows the subject and speak well, congratulations on a video well done from an engineer.

[@rafaelcassiano1366]

Damn BROOO... this is the best video that I watched in my entire life, I have 12 years experience, nice job

[@goodkao]

Wow! You teach us better than our Hvac instructor. I love all your videos. Thanks! 🙏

[@thetruthserum2816]

Perfect explanation on why exactly overcharging a mini split is detrimental to the compressor. Subbed!

[@waleneliyata1252]

You are the best teacher i have ever seen..❤❤❤

[@duotecnik]

Thanks for making this, I've always wanted to have a better understanding of my system. I now have a greater appreciation for HVAC professionals!

[@charlieromeo7663]

Best explanation I’ve seen. Great job. I have the same specialized torque wrench for flared fittings. But beware, it is not calibrated in both directions. It’s pretty easy to get crossed up in the field so make certain the decal on is always facing up when rotating clockwise.

[@ck.MediaBox]

this was quite informative... I was engaged all the way watching this,,, I,m not even a HVAC service person lool.. I just browsing around to figure out why our indoor splitter is forming ice ...

[@acservicetechchannel]

Thats awesome!!

[@jhoneduardogilortiz5731]

Thank you, it's the best KZbin video about HVAC systems

[@webluke]

These videos came out 1 month after I installed a Cooper and Hunter minisplit in my office. Its nice to see the insides and how it all works. I do plan on adding more minisplits to my house after I finish my solar system. With net metering of electicity I hope to save up the solar power and use it for cooling and heating saving me a lot in the winter on propane and more efficent than a swamp cooler.

[@mariolopez1]

Thanks for taking the time to explain each part. Very good video here 👍

[@realSamAndrew]

Now you will be able to share your knowledge with the class on Saved By The Bell!!

[@acservicetechchannel]

Thanks a lot Mario!

[@stephenb5757]

Awesome video. This video is probably the best visual I’ve ever seen. I loved the cutaways of the different parts of the unit. Keep up the great videos!

[@acservicetechchannel]

Thank you so much Stephen!

[@str-1-u5u]

Craig, thanks so much for all you do and for the servicing guides and quick reference cards, they have been very handy. I recently started a new job in a resort that has Samsung mini-splits in hundreds of rooms. I have been looking everywhere for troubleshooting procedures for these things and I am not finding anything that really helps the average technician isolate problems quickly. I enrolled in the Samsung academy, but the troubleshooting guidance is vague and doesn't really help with pinpointing the cause of failures quickly. Maybe mini-splits are too difficult to troubleshoot in the field. I've tried to locate procedures for compressor or EEV failures, but I'm not finding anything. I was wondering if you could start making videos on these units, they seem to be the latest trend in HVAC, but obtaining training has been challenging. Thanks again for all the expert guidance you provide.

[@larkhill2119]

Been a year however, there is a channel called "Taddy Digest" He has a lot of quick simple videos on Samsung mini-splits faults and service.

[@ta3870]

This is the best explanation I've ever seen. Brilliant teacher !!! Way to go!

[@Icytits]

Just incase anyone is wondering, this unit is produced by Midea. They're a chinese company that a lot of north American HVAC brands will buy unbadged for cheap so that they can offer a minisplit option rather than not having one. I'm not saying they're bad units, I install a lot of Carrier/Bryant branded ones and haven't had issues beyond basic maintenance, but people deserve to know what (and where) they are buying.

[@brianreip411]

Do you know if senville uses this Chinese unit?

[@Icytits]

@@brianreip411 Yes. Like I said, they work just fine as long as it's installed by a well-trained and experienced professional. It's very easy to make a small installation error cause the entire system to fail after a couple years.

[@brianreip411]

@Icytits thank you, yea I had a "well trained " technician install mine, 3 years ago. A year after the install highest head on the multi zone coil froze over. I called the clown back, and he put the guages on the system and said it was low on refrigerant. He said it could be his error or the unit error, no way to know for sure. He charged it up, and hit me for 300. Since then I learned to do it myself and now I charge it myself for alot cheaper. Problem is the people that charge you reasonable prices are clowns and your better off learning it and doing it yourself. The other option is a AC company, I had one come in to give me a quote for a 2 head 36k btu for my garage, and they wanted 10k dollars! I bought a home 4 years ago and have done a ton of work myself and hired people and what I've learned is no one cares about your stuff like you care about your stuff. Most clowns want to get in and get out to the next job.

[@Icytits]

@@brianreip411 Do you have an EPA 608 Type 2 (minimum) license? If not, you are breaking federal law by handling refrigerant and shouldn't post this as it incriminates you. Refrigerant does not get used up, it leaks out of the system. You should have someone do a leak check on the system, the leak is likely at one (or multiple) of the field-made flare connections. Inexperienced installers always seem to mess those up. If you want your system to last, you should do the following: Recover the remaining charge. Have a leak check performed, pressure tested to 300PSI MINIMUM (with dry nitrogen, don't use compressed air ever). I've had factory techs recommend going all the way to 450PSI for a leak test. Repair any leaks. Weigh the rating plate charge back into the system with virgin refrigerant. Recovery tanks are filthy, even when "new". Install a surge protection device on the system. Needing to add refrigerant periodically is not a solution, and your system is going to keep receipts.

[@RobertDickens2002]

There was a way to know for sure its called check for leaks duh.​@brianreip411

[@02Clint]

Thanks again for your help on ductless units

[@acservicetechchannel]

Glad it helped!

[@graciemiller9596]

Thank you Craig, I’m not a HVAC man but have installed 4 of these so far on my house. About to do another on new home that I bought. I find them very interesting.

[@frankgall6]

This is a great video. We depend on tech support a little too much on ductless troubleshooting. This is great

[@hanslawatsch6903]

Thanks Craig for that in depth yet concise tour of the the mini split. I particularly appreciated the cross-section of the refrigeration components and the detail on the sensors and signalling which may assist in basic troubleshooting.

[@ericbrobst8160]

Great video Craig! More mini split content please!

[@planeaddiction2560]

I found the issue on a senville unit by watching this video, the K Type sensor was burned by touching the condenser piping , it melted the clear polycon tubing and chaffed the wire, this heat made the board believe the outdoor temp was alot warmer and caused the compressor to reduce the inverter gas at a lower temp causing the indoor head to blow cool air instead of hot air during a minus 7 temp today. Thanks for saving my job today

[@jimmylanders2175]

Hey Craig this was a great video and one I have been looking for on U-Tube. Could you do a series on troubleshooting boards, components and errors. For mini-splits.

[@boehmertechnician8740]

Thank you for explaining this alot of people in the industry kno nothing about mini split systems few will do the research.

[@Noheatcooltech]

Yes Craig 🙌🏾 thank you. We are installing a lot more of these inverters, this in combination with your book is GREATLY appreciated

[@digitalroadz]

Thanks for the information...changing over to a mini split, excellent video...very well explained...5 stars

[@shayne_hye]

Thank you for sharing, it helps me understand more about its individual parts..,

[@sahinunlu8355]

Teşekkurler böyle ayrıntılı anlatım için jeorge kardeş

[@robertwasswa1631]

You and AC or Refrigeration are just one. You're just the subject. Thanks for the explanation.

[@carlosjoelgarcia3200]

Magnificent!! Thank you Craig for another homerun!!

[@acservicetechchannel]

My pleasure!

[@moleisrich1]

I don’t have one but I watched anyway. Very very interesting break down. Thank you

[@sunriseeternity300]

Thank You for the content. Always well executed #hvac #minisplit #enjoylife

[@austinkerr6197]

Thanks for this crash course in mini split system my confidence is way better

[@AussieHVAC]

@ACServiceTech Agreed, you have explained it in our terms and yours is more technician based rather than showing home owners how to repair their own units . Like I’ve been a Fridgy for over 30 years and yeah we could use you in our Tafe’s down here , great work mate

[@RickFowler-w7p]

Beautiful example of superb instruction! Amazing how long the 990 micro farad total for the trio of outside unit fan caps can hold their 300-volt charge after a Samsung Windfree is powered off! Good to discharge it intentionally.

[@stephenbuckley2186]

many thanks, this made things much clearer to me. I have had a variety of different flashing lights on occasion the most common being the run and timer lights flashing twice every twenty seconds or so indicating rotor lock, open phase or damaged wire, and having read the installation docs it clearly says do not install in places where the wind can blow into the fan exhaust as this can cause a high pressure fault and seriously damage the compressor. The place the company installed one of my units does get wind blowing directly into the fan exit and is sometimes strong enough to blow a 2 kilo lead chimney cap off. I only recently associated the fault with windy days. The company seemed unaware of this and denied it could happen. wanted me to pay £250 to come look at it and £850 to fit a new compressor which is rather more than buying a new unit. It does still run but often shuts down particularly when it has reached a temperature and shut down but fails to restart, I can hear it going chug chug and the whole outdoor unit shakes a bit. Dont know quite where to go from here but it has clarified things for me a lot so many thanks again for an excellent video.p.s. I have now built a bit of a screen over the outside unit to deflect the wind a bit.

[@chadhiggins8397]

I was looking for a video like this but wasn't really expecting the find exactly what I was looking for, and so professionally done!

[@jimmysegovia2688]

thanks, Craig!!!! awesome as always.

[@acservicetechchannel]

Thanks a lot Jimmy!

[@andresperez-wc8ty]

Best walkthrough Ive seen. I'd pay for a detailed video to learn how to diagnose supply/communication, charge (measuring subcool/superheat) and bad eev. Pretty confusing how the ac voltage to the evap uses a communication wire? to complete the circuit. I got your book btw, its excellent and easy to understand.

[@toneblair]

Me too!

[@guitarhvac]

Me three!

[@jkbrown5496]

A write up for LG going over what's different about mini splits pointed out that these are thermistor controlled. To see the temp on the outdoor coil side of the EEV, you have to read the thermistor, both the access ports are on the indoor coil side of the EEV. One just after the expansion valve and the other on the return side. So all you'd see on gauges in the pressure change across the indoor coil. As for the power/coms wiring, it appears they aren't sending raw mains to the indoor unit but rather power from the IPM. It would be easy to use one leg to provide a common reference that they also use for the comm wire. Then the units would filter off the higher frequency comms signal before using the power portion. They do say the power legs are polarized in that L2 outdoor has to be connected to L2 indoor, which wouldn't matter on raw mains power.

[@andresperez-wc8ty]

@@jkbrown5496 I dont have much hands on experience on ductless but I do know that to for you to be able to read anything the board is measuring you have to connect these little USB things and or wired it to a laptop which really sucks. Why not just add a simple controller with a screen somewhere inside. AC supply/DC comms it would make sense based on what was explained to me briefly. Bascially use L2 or L1 neutral/common for both the DC and AC wires going to the evap's board. Not 100% sure though

[@alexozorio8090]

What book

[@azim5304]

Good job man You are the greatest in the world. I hope to see you oneday.

[@targetshooter3751]

Thank you for a Super Excellent explanation! I would like to see a future video explaining the error codes in depth, and what they mean - including troubleshooting the HP (P6) Sensor. Why are the error codes different between the inside unit and the outside unit?

[@granazis1]

Awesome video ,informative,no bs and to the point .congrats and please keep it up !

[@brianmcdermott1718]

Great info. on mini splits. Thanks Craig.

[@andrewskater8813]

Amazing amount of knowledge in these videos! A few months of these videos and I might know something.

[@acservicetechchannel]

Were so glad our videos are helpful!

[@atnstn]

Cooper and Hunter is a true professional USA brand. Really solid products, professional servicemen and quality control True USA brand. Very happy with their products so far. Reminds me of Briggs and Stratton engines from a while back. I'm a young-ish idiot but I've used their engine and they were absolutely bulletproof. Nowadays not at all.

[@randybobandy9828]

Copper and hunter is just a rebranded midea mini split. They are the same units as pioneer/senville and many more rebranded units. They are quality units, just not American made.

[@allencar5212]

Excellent video. The thermisters work best when high accuracy is required over a defined temperature range. They are more complex and expensive than a Type K thermocouple. The thermocouple is fairly rugged provided that the junction bead at the end is not damaged. They work over a wide temperature range and only require a simple milivolt measurement to determine the termperature. The thermocouple has 2 wires made from different metals and joined together at the end bead. The 2 different metals generates a milivolt reading that is correlated to the temperature at the junction.

[@ericlincourt896]

Thank u so much. I'm heavy commercial industrial, so it helps when I need to accommodate à big fish client who wants à one stop shop.

[@acservicetechchannel]

You are so welcome!

[@nse08]

Thank you for your good presentation ! Video quality is excellent 👍

[@ghulamemustafa8911]

I love your job brother. Respect and regards. From Pakistan

[@acservicetechchannel]

Thanks so much!

[@john0119]

Thanks for sharing Craig 👍

[@Zamoramax6.6]

Really nice video. I would mention for safety that the inverter switches from ac to dc voltage and on these little guys its generally around 300VDC. So be careful newbies when reaching around. Some of the big boy inverters are around 500VDC.

[@williamcarr3976]

A tech should allow 5-10 minutes of discharge time after powering off the unit. VFDs are full of capacitors and will hold a charge for a bit. I have to be extra careful, I work with big ones that are rated for 2500 amps.

[@chriscermak3188]

Great video Craig. You seem to be the only one explaining Mini splits. There's not much info about them out there other than installs.

[@Your-Local-Insomniac]

Alway learning!! You do an amazing job explaining on both technical side and procedure side.

[@ralphmunoz4582]

Every question i have ever had has just been answered! thankyou sir!

[@acservicetechchannel]

Ha ha awesome!!!

[@kyleh1974]

I worked on a Daikin that also had a miniature liquid receiver. Good content and thank you for everything you do to help the trade!

[@jeanmichel9207]

1:32 nice explanation for the work of the VFD from no expert to US as KZbinrs ,as I know a VFD didn't give a constant voltage but a Sinusoidal voltage also the voltage is related to the fonction V/f if speed go down this mean frequency goes down and voltage goes down.i subscribed because you are sharing your knowledge and mistakes are where there's human work, i hop i will find how to tweak a industrial air Drayer for compressed air in your channel because it's hard to set the temperature between 1-2 Celsius to make water mixed with air to stop be liquid and collected by water trap

[@targetshooter3751]

Which brands of mini-splits are best, and the least problematic?

[@shaheedjackson9991]

OUTSTANDING PRESENTATION!

[@caryandgrace]

Keep the videos coming. Thank you sir!

[@djcds8705]

Impeccably explained, Romania appreciates !

[@thesilentonevictor]

Great explanation

[@acservicetechchannel]

Thanks a lot Neilvester

[@soloch69]

Great video and also love the book it was so helpful in the field 🙏🏻🧿🪬keep up the great amazing work looking forward to what’s next 🙌🏻🙌🏻🙌🏻

[@maxgrind438]

Beautiful video Amazing explanations Brilliant presentation.

[@b5a5m5]

Hi Craig, At 10:45 you seem to have some misconceptions about how k-type thermocouples work; Just wanted to let you know that thermocouple type temperature sensors work off the principle of the Seebeck Effect. This means that they don't change resistance with temperature, they actually generate a (very small) voltage proportional to their temperature which a control board will process (cold junction compensation & amplification) to determine the temperature.

[@williamcarr3976]

They are actually considered transmitters and work off of a 4 - 20 milliamp signal at 24 volts applied. If using a standard volt meter, you will get no useful information for troubleshooting. You need to break the circuit and insert an amp meter between the thermocouple and sensing device and read the miliamps, unless using a milliamp clamp. This is instrumentation stuff and is engineering overkill IMO. I’ve had to work wit this stuff in the oilfield. I bought a Fluke 789 process meter that allows me to imitate a sending device, that can send a signal to the sensing device or it can read what the device is sensing to the sensing equipment. Fluke makes a milli amp clamp as well that gets you around having to break the circuit to insert a meter. I doubt 99% of AC techs will have what is needed to troubleshoot these devices that are mostly seen in plants and other industrial settings. That’s Fluke 789 meter is about $800 by itself.

[@wasimedoo7994]

Very good information bro keep it up God bless

[@acservicetechchannel]

May the Lord Bless You Too, thanks, will do!!!

[@southbridgeforestHOA]

13:00 should one add some insulation around the compressor and heater so keep it running better in cold weather???

[@edlauren9434]

Thank you for this video!

[@kK-br7te]

Hi there, great video and explanation. Much Appreciate it. So we have a midea split system with heat pump which doesn’t blow cold anymore the fan come on and humming noise you hear and then the fan turns off… also changed capacitor. Checked refrigerant pressure keep reading gauge 225 psi with system on full cold. All the currents are also ok ..

[@hsdengineering7207]

great explanation. It appears this is the same manufacturer of the mr cool mini split after opening mine up. note the type k thermocouple does not function by changing resistance but rather generates a voltage from two dissimilar metals proportional to the temp in the mv range.

[@hsdengineering7207]

not quite same as mr cool, electronics appear more high quality on this unit. the mr cool is lacking many of the inductive choke filters and has much smaller heatsinks. otherwise hardware appears the same.

[@thirua6010]

Great teacher - Thank you.

[@douglasshackett8747]

Just what i needed, thank you!

[@acservicetechchannel]

Thats awesome!

[@armarra]

I learnt a lot thanks. Short n sweet.

[@moeselec]

Another fantastic, informative and detailed video. Thank you much. 👏👍

[@frengkymelki2205]

Thank you ac service tech. Good learning. 🇮🇩

[@gearhead391]

Can you pack the dough dope to prevent bugs and wasps around compressor covers from getting in

[@sunilkumartalakayala4133]

Excellent job bro 👏👏

[@acservicetechchannel]

Thanks a sunilkumar

[@NativeBowhunter1965]

Craig, could you do a video on Freon recovery on a mini split that’s not operable?