Electric Expansion Valve (EEV) Operation and Testing! HVAC Metering Device Training!

[@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

[@timdestasiohvac]

Craig your brand is single-handedly changing the service industry for the good! Well done!

[@acservicetechchannel]

Thank you so much Tim and I'm looking forward to meeting you at the Symposium in a couple weeks!

[@musakavalci9470]

Would this be transferable to the systems in the UK? For example, does it have both voltage differences and temperature differences?

[@l0I0I0I0]

How much torque do those tiny motors have?

[@Thelongmanable]

*_It's a servo valve!!!_*

[@oderamichael9994]

this really helped me during replacement of 2.5hp LG compressor, i had to remove the EEV to create space after the workdone i fixed the EEV clockwise direction and the system couldn't discharge refrigerant i came across this content that helped me understood the magnetic force and i clipped the EEV in anticlockwise direction and it worked 💪 ❤❤❤ really grateful 🙏

[@mazarat4768]

Thank you bro. My problem was like that. But I knowed now

[@Uncle_Jesse]

outdone yourself....I bought your manuals out of respect, going to gift my apprentice because real recognizes real and I cant explain like this...amazing job my friend

[@acservicetechchannel]

Thank you so much!!!

[@LC-qi5ff]

Thank you! I was going to buy a $200 eev magnet tool but now i know all i need is an eev coil head! 🌟

[@_HVACdad]

You my friend, are going down as one of the best HVAC teachers ever 👏🏼👏🏼

[@philips170t]

Agreed.

[@aleonyohan6745]

Absolutely brilliant video

[@drrenard1277]

Stepper motor valve. Very nice and precise. I would have thought there would be an encoder but going full out and in is good way to get a blind position unless there is something stuck (not sure if there is a situation that causes that)

[@whatwoulddennisdo7243]

Thanks for the wiring orientation. I made one up but did not have the specs on it as it was a 6 wire. Been able to successfully replicate the results here, many thanks from me

[@omarfue556]

Really good explanation on how these valves work. Thank you.

[@arthurhartwick7974]

Never power a solenoid coil without the core that it operates. Without the core it won't generate a back EMF and the coil will experience overcurrent and burn out.

[@jayjordi]

kzbin.info/www/bejne/gqvZh52sitWCjK8m48s

[@neilbradley6571]

K

[@matthewarndt7770]

To be fair he said that in his video he’s pretty smart and has helped me a lot in my career along with Bryan Orr and gray furnace man. Just a few more resources for you.

[@rodgraff1782]

It’s not a solenoid coil it is the field windings of a small stepper motor. He did no damage to it as there are only small electrical pulses provided in order of the colored wires, that drive the motor in small increments.

[@dmiestercommkitchentech3043]

It is not a solenoid at all it is a stepper not solenoid😂😂😂😂😂 solenoid valve opens and closes period a stepper adjusts the opening not a solenoid.

[@johndove5902]

so:this is like an electrical replacement for the mechanical valve known as the txv.l Very awesome video.

[@jammermac381]

I feel like I’m back in college studying electronics technology but with more hands on training. You would make a great professor at a university sir. Thanks for the free college classes. 👍

[@inothome]

Great explanation of the stepper motors in EEVs. And thank you for saying "negative"! Seems everyone these days says "plus" and "minus" when referring to DC polarity and yes, a pet peeve of mine. Positive and negative dammit! lol

[@jec_ecart]

Ac technology is getting super complicated.

[@MichaelSmith-pg6gi]

I've heard that " clicking sound " so many times when starting up a newly installed minisplit but never knew that is was the metering device. These videos really give me an edge in the field.

[@HVAC-TECH-Les]

This is by far one of the best EEV/EXV classes I've ever seen.....such great information, love the cutaway. Thanks for the video.

[@willclayton9909]

watch real engineering steeper motors so this will make more sens

[@Gameplayer55055]

you just explained stepper motors in general for complete dummies. tho it'd a part from AC but all steppers are like this

[@jcaleca60]

Basically what Doing changing the polarity on DC Like on a call window To go up-and-down reverse positive and negative To the motor

[@jasonjohnsonHVAC]

Absolutely fantastic tutorial on the operation and how it actually works. Bravo Craig

[@ssrajui0075]

My dear explainer please note it's not high-temperature liquid, it's sub- cold medium temperature liquid refrigerant

[@zipperdingo6385]

Craig, your videos always stand out in content and clarity, many thanks for a new value

[@ReliableHVACR]

This is great, had issues with them but it ended up being a faulty board. So helpful to see the guts in action

[@Cloakedpyro]

Was that voltage issue on a Daikin or Fujitsu by any chance?

[@ReliableHVACR]

Refrigeration side I see them on walk ins, it was an Intelligen by Heatcraft

[@MrZa3000]

You make it easy to understand with your flawless explanation. God bless you.

[@stefano8809]

thanks for masterful and deep explaining

[@Cloakedpyro]

Just had to replace one of these EEV's on a Daikin at tech supports direction, and at the end of replacing it i still had almost no clue what it actually was. This vid came out the next day, lol thanks for your clear presentation. I bought your 1st book, and am eager to order this one as well! These minisplits are mysterious to me, and i dont necessarily like servicing them, but they definitely seem like the "way-of-the-future", so thanks for keeping us ahead of the curve!

[@acservicetechchannel]

Thank you so much Cloakedpyro!

[@aleonyohan6745]

​​@acservicetechchannel I work for fluid Chillers and I am pushing hard for us to have these on all of our Chillers especially our large low temperature Chillers. Controlling the superheat especially with large load swings is extremely important for efficiency and the life of the compressor.

[@USA-GreedyMenOfNoIntegrity]

I’m impressed dude. I wish I had more instructors like you and tech school. Although mine were pretty good down in Lawrence County Georgia- Gwinnett Tech. During initialization, I think it only seats it in one direction. The manufacturer knows how many pulses it takes to get to the other end.

[@Mohamed-Fadl]

Thanks for the good information. I wish you all the best. Excellent video

[@marekracko2364]

Excelent video. The best decription of function and principle EEV. Big thumbs up !!!

[@joneslmofokeng5924]

Very informative.

[@flappingflight8537]

The same principle as internal combustion engines idle control valve . Probably this one has a finer resolution ( more and smaller steps ) .

[@norcal_inspector]

This was a great video! I'm gunna buy the book

[@rolanddejesus8685]

thank you very sir for a clear explanation....

[@Александр_Фомин]

Спасибо.

[@jasongoertzen]

This is the video I have been looking for for so long.

[@electrolatif]

Hi, Today have one customer, compressor model MUY-GE13VA. The LEV give different reading R-BR:0 R-BL:0 R-OR:49ohm resistor R-Y:0 R-W:49ohm resistor BR-Y:49ohm resistor BL-Y:100ohm resistor Is this LEV spoil because i dont have service manual for this outdoor unit Thank you

[@abdulgaffarmohammedshafee9333]

Thank you

[@stephwaylonwells3218]

👍

[@SULK81]

Now there is a EEV Magnet from Johnstone Supply 👍

[@gaborkiss2819]

Thanks, it was useful

[@acservicetechchannel]

Glad to hear that!

[@caffeinatedinsanity2324]

320 pulses for full travel is a good resolution but if you had something a little bit less precise, there's always the method of "half steps" that you can use that's not that much more complicated. It will double your number of possible angles you can position your motor at.

[@brianmcdermott2430]

Great info. Craig. Thank you. Great video.👍👍👍👍👍

[@musakavalci9470]

That was beautifully explained and presented. Thanks

[@thesilentonevictor]

Thanks for the educational video

[@Yasir_Khadam_Hussain]

اسلام وعلیکم Dear sir am from Pakistan plz send me This book

[@rodgraff1782]

Carrier had these on their flowtronic chillers. I had to replace two. They were very large, and made of brass. Pipes were 1 1/8” in and out. Ran on the same type of stepper motor, but used a lead screw to drive a slotted piston up and down. Two refrigerant circuits, 125 tons each. The chillers were an absolute service nightmare.

[@narayanaya5519]

Let me know how to identify wires upper coil and lower coil.how about 5wire coil is this coil has upper and lower coil.

[@acservicetechchannel]

Yes we discuss that more in-depth in our inverter mini split book, thanks!

[@mitsos306ify]

Great video , thanks for the knowledge! From what I understood, it is a kind of specialised stepper motor! Now I have to find an application for it!

[@satyakumaraswamy6161]

Superb 😮😮😮😮

[@jspinosa50]

Very informative explanation, thanks

[@kyleinthought]

As design and commissioning engineers, we rarely pay enough attention to these details - so I appreciate your detailed work here.

[@hackfreehvac]

@9:30 many use say 1500 pulses and even into the thousands to go from full closed to full open. The stepper motor driver can do 1/2 step or 1/4 step down to say 1/8 etc by applying pwm varied pulses to the next pole while the first pole is still energized to clock the magnetic field between the two and then trims the first coil pwm down until it finally clock's to the next field. So then it an take 100+ various steps to do one rotation and have more precise control. On my DIY I just do full step and it takes right about 255 pulses to go from closed to open.

[@stan-r]

Thank you so much for making this video! This really helped me to understand how the EEV works and how to troubleshoot them.

[@rivergate950]

14:26 so what kind of insulation and tape is high recommended to prevent the rust out?

[@fernandofrancisco3106]

Excellent video. So much information to learn, I love your videos. Thank you sir Have a great weekend 🎉

[@paulcandiago9339]

Thank you

[@vinhtran4886]

Do you have a book on vrf system with multiple wall mount cassette, ceiling cassette and slim duct?

[@chrissapp9243]

Fascinating... This explains the "rattle" on the old FloTronic EXV (Carrier) at start up when it drives closed for pump-out at start up. Same operation as these, just bigger. Glad you made this video!

[@rondouglas6486]

Excellent video....excellent quality love your channel!!!!!!

[@wd8557]

Excellent

[@klimatisteknik]

Yazmış olduğunuz kitapdan dolayı tebrik ediyorum Türkçe dile cevrili bir adet sipariş vereceğim yardımcı olabilirmisinizz Videolarınızda türkçe dilini açmak istermisiniz

[@jixia676]

Can you explain how to diagnose communication error on split system by any chance? It's common problem and I don't know much about it. Does that split system book cover the troubleshooting of communication error? Thanks heaps.

[@electrolatif]

Great video like always Today have one customer MUY-GE13VA give different reading R-BR:0 R-BL:0 R-OR:49 R-Y:0 R-W:49 BR-Y:49 BL-Y:100 ?!?

[@luciancostea9223]

From Romania,thank you for the presentation, very useful and perfectly presented. Respect👏👏👏

[@hiz-n-lowz1577]

free Top G!

[@mwdub02]

Free Andrew Tate

[@stevengilber1153]

Excellent Video

[@TonyRodriguez-ok2ix]

What's the name of that 12 v power supply

[@acservicetechchannel]

Its in the vid description section as a link!

[@moralatu]

Super informative video , thanks for taking your time to help other people I really appreciate you doing this

[@RollinHomies]

I have a 12k air handler and a 9k dual unit. I’ve always been a little skeptical as to wether the evaporator coil has ever given more than 50% ramp to the compressor. If I remove the thermostats from the line sets, I can get it to ramp up 90% and it will stay there until it freezes over (usually takes a few hours). Even when I put the larger 12k unit on turbo and set the temp to 65, it will not give me more unless I pull the thermostats on the line set. Do you think the EEV could be the culprit?

[@bigjoshlevine]

Great video! I wonder why they have those center taps on the coils? Why don't they drive this with just 4 wires by alternating the polarity across the two coils, which would require only half as much copper for the same amount of torque. Also, why don't they put a conformal coating over those teeth to prevent that rust buildup? Thanks!

[@JuanTodoli]

Excellent 👏

[@nickditota2754]

What probes are you using when you were checking the ohms on the plug? I need a set for mini split diag

[@hackfreehvac]

They do sell a service magnet orientated to drop on and rotate.

[@switzka]

Nice worked bro, fully replayed playlisted , 39/39 #kts

[@narcisosanchez243]

Hi, glad to get in touch with you. I work as an air conditioning technician for Mitsubishi Heavy Industries in Spain. I am pleased to inform you that I have developed a small tool to check the EEV of the different air conditioning equipment. Carrying out tests on devices for domestic, industrial, VRV and Aerothermal use of the previously mentioned brand and also domestic Hisense. These teams mount EEV from the manufacturers FUJIKOKI, SANHUA and SAGINOMIYA. With the device, the technician can verify three points that I consider important in the diagnosis of the element: - If the A/C equipment pcb transmits the signals to the EEV. - Measures the resistance of the EEV coils. - Finally, it can be opened - closed automatically, or manually select the number of opening or closing pulses. If you find it interesting, you could expand the information you consider appropriate. Greetings

[@drewc7479]

Where can I get that info ?

[@narcisosanchez243]

@@drewc7479 Hello, I have uploaded another video and I think you may be interested. Greetings kzbin.info/www/bejne/fmHNe6Kji9Fpnqc

[@robertoalvarado9424]

???

[@jixia676]

Hi, Mate. How can we test if the eev body is good or not if the normal manual solenoid valve opener doesn't work on EEV?

[@marializianichols648]

And of course if we use pwm signals we can split steps into microsteps of 1,8 degree divided by 256 ...so the valve can control the evaporator superheat with amazing precision.

[@haunguyen-tr2zm]

it is a very useful training. thank you.

[@Josh-pu4wn]

Ive been looking for this info for so long, thank you sir

[@johnconner8379]

Sir i wanna ask The EEV will damage if do pressure test on coil (Due to off ) don't know where the pin is (will damage by over pressure) As you mentioned on this video the EEV will stay if no power provided If run the a/c then turn off power (power supply) (Pin will stay open?) Still can be damaged by over pressure?

[@ChristRegeneration]

Great video. Bravo 👏

[@indiantraveller194]

I'm biggest fan of yours sir 😘🇮🇳🙏

[@S.mohanraj429]

Can you explain me how IN HIGH TEMPERATURE AND HIGH PRESSURE refrigerant can stay in liquid form

[@ia3598]

Has anyone worked on a 5 zone Fujitsu with 5 EEVs (AOU45)? Are they normally open with power off? For pulling a vacuum.

[@carllungwitz5171]

Very good video. Am I correct in assuming that the valve is not field serviceable? Can the body be disassembled for cleaning? Of manually forced open for any reason?

[@the-real-things]

I have a Daikin Multi Split unit (MXM series) which had valves replaced due to failure. Now they replaced the motherboard because Daikin sent a new board that sends a higher current to the EEV. It worked for about a month. Now back to square one because one unit inside stopped working again. It seems that these coils are prone to fail on Daikin units. I hope other brands do not have this issue.

[@sureshkumar-fp8bl]

Sir Please upload DanfossETS 400 EEV 4wire how to check manually check same method.

[@MindzEnt]

I miss the days when it was just a damn contactor and capacitor.

[@googacct]

Not sure if it would be overkill, but with the availability of really cheap handheld oscilloscopes it should be possible for a technician to verify the presences of the pulses. If you add a relatively inexpensive current probe it is not necessary to pierce the wire. to see the current. Also with the current probe it should be possible "see" the movement of the valve. A similar principle is used for checking electronic fuel injectors to see if the pintle is stuck. If the pintle is working it is possible to see the pintle hump as the injector moves.

[@davidsanders6957]

B and a 30 year plus senior reproduction technician. I can see the advantages of this device in an automobile. however, you give me a walk in or where else freezer and I'll bet my bottom dollar. I would much rather adjust TXV superheat manually, then depend on an electronic pause.

[@ameenmakramey1274]

Professor, if you could please explain to us a video about the closed electric expansion valve, which carries the model EX7-121 from the working company Amrison, the method of connecting it to the driver, its maintenance, and its problems. I thank you for your cooperation. We greatly appreciate it.

[@Dathobbit1990]

Bạn có sách dạy sửa điều hòa inverter à. Có thể tặng tôi được không.

[@MarkAng-n8r]

My ac went through system reprocess because it is icing. But icing still occur sometimes.. Is it possible this valve is the problem?

[@danielranc8963]

why bother with those when you have cheap & simple stepper motors available ? This looks like remnants of the 1950's.

[@Didik-cq8wy]

Trimakasih bos

[@LarsPW]

Apparently the magnet in the vent and the coils outside form a rough stepper motor. It saves a relative expensive standard stepper motor (which could as well get magnetic coupled to the inside of the vent), but provides some sort of positioning control. A little DC-motor with an incremental encoder would be more expensive and its gearbox has more wear.

[@rcinfla9017]

You did mention possible damage due to nitrogen pressure test. You did not mention anything about EEV position after completed temp call during off interval. It would seem like a bad idea for an EEV to be left in totally closed position during off interval from a compressor point of view.

[@TheElectronicDilettante]

So that’s magnetically coupled, there’s no mechanical connection? It’s like the pin is the armature of a stepper motor but with reluctor ring stationary. Very cool

[@RR-Mekatronika]

like motor stepper how it works. use pulse DC for a better angle position. thank you for sharing the knowledge.

[@dwiputramardiyanto7414]

Hello Mr.. I want to ask,!? Can there be a blockage in the electronic expansion valve? What's the indication if it's clogged? And can it be repaired without having to replace it with a new one?

[@whitesheatingairappliancer7101]

Whirlpool had this they might still have it on some of their french door refrigerators but five years ago they had this and we learned about training on it and one of the instructors he mentioned there was a filament that you can put up next to it and it'll show the magnetism. It was some special filament. I forget what it's called. Great video. Your new book that I purchased arrives Tuesday looking forward to it

[@oragontv8010]

We have problem about eev, qnd try to remove and replace it an capilliary tube,, now the unit wirking