MINI SPLIT Parts Explained! Understand What They Do!

In this HVAC Training Video, I Explain the Inverter Minisplit EEV, Compressor, Crankcase Heater, Pan Heater, Coil, Electrical Connections, PCB, IPM Controllers, Accumulator, Muffler, Strainer, Service Valves, and Outdoor Fan Motor. I move Step By Step through the Function of each Electrical and Refrigerant based Part! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #minisplit #components #explaination #expansionvalve #EEV #compressor #crankcase #heater #panheater #coil #electrical #PCB #controller #accumulator #muffler #strainer #servicevalve #fan #fanmotor
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[@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.

[@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...

[@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]

😢

[@spelunkerd]

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

[@acservicetechchannel]

So glad that you thoroughly enjoyed it!

[@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.

[@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?

[@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!

[@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?

[@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.

[@andrewlopin5247]

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

[@peepeepoopoo1399]

Thank you, Craig! I’m finally achieving a confidence to stick my hands in VRF equipment, thanks to you! Greatest teacher ever.

[@gyenisattila1069]

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

[@goodkao]

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

[@camiloramirez3367]

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

[@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!

[@user-tj5nv9pk6f]

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!

[@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

[@BrokeYuppie718]

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

[@rafaelcassiano1366]

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

[@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.

[@boehmertechnician8740]

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

[@ta3870]

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

[@gadgethunter5732]

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

[@02Clint]

Thanks again for your help on ductless units

[@acservicetechchannel]

Glad it helped!

[@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!

[@stan-r]

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.

[@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!!

[@frankgall6]

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

[@Noheatcooltech]

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

[@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!

[@NorCal-refrigeration]

Outstanding!!⚡️⚡️ !

[@acservicetechchannel]

Thanks Dave! I am trying to make it out to AHR this year. Maybe I will see you there if you are going?

[@NorCal-refrigeration]

@@acservicetechchannel I’ll take a look and see.

[@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!

[@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.

[@TampaTec]

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

[@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.

[@thetruthserum2816]

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

[@Fred-zt6gf]

You literally make my life not suck as much. I’m a new service tech who hasn’t really been taught mini splits and I’m at a call as we speak trying to figure out how it all goes together so I can articulate a good reason why it’s not working right.

[@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!

[@user-sc7ll3zl2e]

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.

[@ericbrobst8160]

Great video Craig! More mini split content please!

[@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.

[@waleneliyata1252]

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

[@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

[@robertwasswa1631]

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

[@jhoneduardogilortiz5731]

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

[@ghulamemustafa8911]

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

[@acservicetechchannel]

Thanks so much!

[@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.

[@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.

[@SirGicano]

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

[@sahinunlu8355]

Teşekkurler böyle ayrıntılı anlatım için jeorge kardeş

[@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.

[@Your-Local-Insomniac]

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

[@djcds8705]

Impeccably explained, Romania appreciates !

[@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?

[@nse08]

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

[@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!

[@john0119]

Thanks for sharing Craig 👍

[@brianmcdermott1718]

Great info. on mini splits. Thanks Craig.

[@moleisrich1]

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

[@frengkymelki2205]

Thank you ac service tech. Good learning. 🇮🇩

[@douglasshackett8747]

Just what i needed, thank you!

[@acservicetechchannel]

Thats awesome!

[@jimmysegovia2688]

thanks, Craig!!!! awesome as always.

[@acservicetechchannel]

Thanks a lot Jimmy!

[@moeselec]

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

[@ducharmehvactraining925]

great job as always Craig!

[@maxgrind438]

Beautiful video Amazing explanations Brilliant presentation.

[@austinkerr6197]

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

[@sunriseeternity300]

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

[@carlosjoelgarcia3200]

Magnificent!! Thank you Craig for another homerun!!

[@acservicetechchannel]

My pleasure!

[@azim5304]

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

[@shaheedjackson9991]

OUTSTANDING PRESENTATION!

[@caryandgrace]

Keep the videos coming. Thank you sir!

[@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.

[@scrivyscriv]

Thanks for the video, it's quite helpful!

[@tainelio9266]

This is awesome, excellent explanation. Thank you

[@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 🙌🏻🙌🏻🙌🏻

[@kennethlobo4420]

Great explanation

[@Dimi3sX]

Very educational,Thank you!!!

[@shayne_hye]

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

[@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

[@ashleydawkins2407]

Very informative, great breakdown

[@alangivens7983]

Great content I am really impressed!

[@patrickg875]

Awesome explanation. Thankyou!

[@chithrabharathi1678]

Great explanation, Thank you sir.

[@controllingtheironbeastalu5639]

Well detailed! Glad found this one

[@thirua6010]

Great teacher - Thank you.

[@anthonygasparini1734]

Excellent video. Thank you for a very informative video

[@armarra]

I learnt a lot thanks. Short n sweet.

[@stevemas4966]

Very helpful video, thank you

[@Roman-uv7ch]

Great JOB!!!

[@sydneynguyen1461]

very good job. Thanks

[@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.

[@ralphmunoz4582]

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

[@acservicetechchannel]

Ha ha awesome!!!

[@edlauren9434]

Thank you for this video!

[@richzamora1393]

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.

[@croosmer4266]

great job

[@prabhuudhayakumar2531]

Very well explained, Appreciate it

[@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!

[@skipsaunders5974]

Excellent video....thanks

[@mvanderw379]

Very well explained, many thanks.

[@acservicetechchannel]

Glad it was helpful!