Inverter Mini Split FAN MOTOR Operation and Testing! 5-Wire BLDC

[@Jaybizzle1247]

Thanks for the detail sequential explanation as usual Craig 👍

[@jpenn727]

As always, another great video and explanation. Thank you so much for your hard work.

[@nasserahmed583]

Thank you very much for sharing this video. Well done and very easy to understand. Just what I was looking for. Planning to buy your service manual.

[@D2DNYAC]

very technical I like videos like these, may I say it was flawless. I hit the subscribe button right away, I would like to perhaps ease some of the confusion and perhaps fear of some viewers due to the very technical nature of this video, by saying that 9 out of 10 times in the event of a bad fan motor these mini split units are smart enough to self-diagnose this problem and then generate an error code. Now all you would have to do is look up the error code on the internet, for the explanation or diagnostics for the error code. Often times you will easily find the service manual online which have step troubleshooting guide for each error code.

[@Achabab]

Unique video ❤ explain fan motor ❤in KZbin Thank you very much I learn new things today

[@arezkichetouane6839]

Just placed an order for the book many thanks

[@douglieberman6406]

I just scrapped about 4 units in a scrap yard with these motors in them also!

[@davidgrisco1939]

It would be nice to see the condensate collection path before going to the drain line and how to diagnose leaking indoor units and how to maintain them.

[@gamerzoneblastoffcreation6758]

Best explanation ever seen

[@jeromefriolet9076]

Of course a noisy fan motor. Good information for future diagnosis

[@dket2571]

Excellent presentation, thank you.

[@NorCal-refrigeration]

Great stuff!!

[@HeartCompassAdventures]

Very clear and helpful for troubleshooting Thank you!

[@dbbd9890]

This has given me a good insight into DC fans. Unfortunately in my experience a bad fan means a dead pcb, and a dead pcb means a bad fan. All the diagnostic flow charts and readings never come to the conclusion of, throw it in the bin.

[@USA-GreedyMenOfNoIntegrity]

Which PCB? That is what you have to know how to discern. Degree flex has a one horsepower BLC constant speed motor. It has 240VAC going to the inverter module on the back of the motor. Then it also has the four low voltage wires connected to the PCB in the air handler. All of this junk once out of warranty will get replaced with either a constant torque motor or a PSC motor.

[@yasserghozy6815]

Very informative video

[@winstagram1785]

This is very similar to Mitsubishi fan motors. One tip, not sure if it’s true for all, but if you turn off the motor and manually rotate the wheel the rotational feedback should alternate between 0 and 15vdc. If you do it while the motor is running you won’t be able to read it on your meter.

[@williampitt570]

Love the video can u do a video on ptac

[@one04all33]

man you are legend. tnx for the tips.

[@thanktheknife]

Awesome demonstration! I have a DC indoor motor that will only run on high speed, no matter what I set it for. What would be check required to tell if it’s the motor or control PCB failed??

[@shafi10a]

I have same issue but this guys not replying to any comments it seems

[@TOSOTsuppliesSharing]

Thanks so much for this excellent video

[@Pipefitr18201]

Great content!! Just wondering how advanced is the information in this book? Would you say it’s universal across most brands? Would you say it would benefit a 30 year tech?

[@ScifinewsDE]

Superb! What is the name of that 5-pin Connector?

[@HVAC_Tips_Tricks_Calcs]

Can you also check the fan motor by ohming the windings? Just wondering if the fan takes out the board, if you can check the fan before putting in a new board, only to find out it was the fan by smoking another board.

[@jamesfitzsimmons381]

Great video

[@neon-john]

Since most modern multi-meters are capable of measuring frequency, a much better way to check the feedback signal is to put the meter in frequency mode and observe the frequency change as the motor speed changes.

[@JuanTodoli]

Excellent.

[@qcsupport2594]

@3:25 I guess you could fry something if you try to measure between Red (280VDC) and any other pin except Black (GND)?

[@RuslanRakhmatullin]

where to buy such a rectifier/converter?

[@samhaazratechnicalsupport]

Love you sir 🙏🇮🇳😘

[@ayeslim47]

That’s gay

[@noahoyeah]

Is there a scenario that this blower motor could be overheating enough to cause condensation at the housing? Zero pan leaks.

[@JohnSmith-dc1xf]

Can you provide a link to where to buy the variable voltage output devices you used in testing?

[@DM-fz3ly]

Thank you so much for sharing your refrigeration knowledge! I have a question. I need/want to add a mini split to cool a couple of upstairs bedrooms. Can you please comment about the consideration of installing 2 separate mini's vs buying 1 that has 2 zones?? I have the room and the cost of buying 2 separate vs 1 dual zone is about the same. Also is it possible to only install just one of the indoor units and leave the second lineset ports blanked off for a time? Does the complexity go way up on multi zone? This would make a great video discussion on multiple single zone vs multi zone. Thanks

[@neon-john]

Sure. With a single outdoor unit per indoor unit, each unit can be in a different mode. For example, if you have a room that receives a lot of sunlight, you'll be running in cooling mode. On the other side of the house in the shade, the room may be cold so you run in heating mode. OTOH, a multi-zone outdoor unit requires every indoor unit to be in the same mode. That is, either heating or cooling. If you put one unit in heating and another one in cooling, the units will error out. The outdoor unit cannot operate in both modes at once. Frankly, I've yet to figure out the purpose of the multi-zone outdoor units. Stick to one system per room.

[@mikefreedom5612]

Excellent

[@samhaazratechnicalsupport]

Good vedio sir ji 🙏🇮🇳😘

[@Thermodynamics6543]

Thanks much

[@peterndwiga4694]

How about Mitsubishi split unit blinking 14 times ?

[@molotovvvblonde4859]

Can I please ask what the name of the blue part is. I have one but I accidently broke a few of the little pieces and bow its off balance and loud. I can't figure out the name of the part to see of I can order it and replace it. Please and ty!

[@douglieberman6406]

I cannot relate to 280 v dc to this small motor even if it is divided 3 ways approx 90 v dc per winding when a small kobalt brushless impact drill works off of 24 volts dc and really is powerful small motor ! I have studied a lot about direct current at DeVry and Middlesex County College in N Brunswick, New Jersey !

[@alanmainwaring1830]

These "brushless" motors convert the DC into AC and adjust the frequency of the AC for speed control. They use what is called a Hall Effect device which produces a Voltage proportional to the magnetic field strength. They still are an induction motor, it has taken a lot of clever engineering to produce these motors Even the circuit board in the motor is a complex system.

[@brucehamilton3157]

My Midea 12k mini split heat pump blower fan runs too slow to cool the room, even on high. The Turbo setting is the only speed that works ok, but then it times out after a few minutes. It's been like this from brand new, frustrating because the unit never gets to set point in a reasonable amount of time. Any insight would be appreciated.

[@ashwinprakash2254]

How to reduce speed on this fan...which wire?

[@sigma4972]

0:04～0:07 What brand of air conditioner is this?

[@williamsaramosing8395]

How can I buy that book master? Thanks

[@acservicetechchannel]

www.acservicetech.com amazon google play and apple books thanks!

[@amjadhanwar2401]

Sir I have croma split AC 1.5ton showing E5 error please Explain.

[@shafi10a]

I accidentally took apart my fan motor and now the fan just goes to full speed and shuts off showing e3 error. Plz halp 😅

[@alpbhs4912]

Kitabın türkçesi varmı ❓ lütfen cevap verin

[@sprockkets]

This is the Cooper and Hunter Astoria unit in the beginning, which features easy access to the fan motor.

[@houptee]

Who makes the Cooper units? I thought all the mini splits were rebranded Midea or Gree.

[@sprockkets]

@@houptee It's most likely a Midea based unit, but this particular setup for the air handler is not duplicated with any other clone I've seen so far.

[@shieldcracker]

Midea

[@TD_YT066]

​@@shieldcracker Interesting, I've got a 10year old Grunaire , has a Panasonic motor like this, but 30W, very hard to find a cross for it. Makes that same sort of whining noise but louder , and does not run as fast as it did new. I build a test rig with a variable transformer and a bridge rectifier to convert to DC. A Dual output bench supply give me the 15V VCC and 0-7V control voltage. The FG output seems to be fixed frequency, but PWM, if I run low speed and stop the rotor, it still outputs pulses (viewing on an O'scope)

[@douglieberman6406]

Then the label is wrong to apply that high of dc voltage to the input !

[@douglieberman6406]

I imagine the input voltage or VM has to be dropped to 28 v dc !

[@ShanQueefus]

These things are junk.

[@jimibmore]

People fear what they do not understand.

[@chrisE815]

Mini splits?

[@sprockkets]

@@jimibmore which is confirmed by their channel listing lol

[@vijayanathanstephen9308]

❤❤❤