HVAC-How To Check The Windings Of a 3 Phase Compressor & Check For Any Grounds (A/C & Refrigeration)

[@3lbs]

As a Professional HVAC installer with limited service experience, I find this video easy to follow and understand. Thanks for the video.

[@JumpermanTech]

Thats awesome! Glad you found this video easy to follow & understand. I appreciate the feedback🙏 Stay safe out there & stay tuned for new videos every week🔧

[@jollyscaria1922]

Vrey good welcomed

[@jollyscaria1922]

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[@smith6603]

Am admiring your videos, they are teach me amazing ways to level up my education.

[@RalphbeingRalph]

This helped me a lot furthering my HVAC career

[@1mandynasty727]

So easy you made this video 😮

[@anvibrimel41]

Thanks for the teaching,and a have a question what meant is when checking between the Wingdings you get OL on a 3 face compressor,exactly the same like you used to teach. Thanks for the answer y your time

[@JumpermanTech]

You're very welcome & thank you for watching! OL would mean you have open windings which means you have a bad compressor and it must be replaced. What you are checking is the resistance of the windings to see if they are in tact or not. The best test for this is to use a meter called a megohmmeter and I made a video on how to check all kinds of compressors with that. Stay tuned for new videos every week🔧⚡️

[@Steven-wp6pr]

I liked the way you were direct and no fluff

[@noonej6523]

The compressor I’m testing right now currently has no resistance but all three of the thermals are giving me a diffrent ohm reading what could be the reasoning for this?

[@chrismuniz8515]

Perfect demonstration str8 to point

[@Eddy63]

Good info Jumper ... Thx

[@aliqtr7495]

Thanks ,u teach in easy way .GOD bless u

[@JumpermanTech]

You're welcome & thank you! I appreciate that very much. Stay safe out there & stay tuned for new videos every week🔧

[@alexeytech1495]

Great video for the technical personal.👍

[@JumpermanTech]

Thank you very much! Glad you found this video great🙂 Stay safe out there & stay tuned for new videos every week🔧

[@techfive7202]

Dont do much light commercial. Mostly residential. I had an rtu 3 phase carrier today 10ton that the compressor terminal port blew out and leaked all the refrigerant. Tested ohms across and got 5ohms on each leg. Will grounding it out somewhere cause it to blow like that?

[@JumpermanTech]

You got 5 ohms across one terminal to the other or one terminal to ground? It could def be a possibility. Thanks for watching. Stay safe out there & stay tuned for new videos every week🔧

[@techfive7202]

@@JumpermanTech all 3 terminals tested 5 ohms on resistance across each other. Nothing to ground. 15 ton rtu

[@softwarephil1709]

You should use a megger insulation tester like a Fluke 1507.

[@JumpermanTech]

@@softwarephil1709 That one is nice. I'm currently using the Klein Tools ET600. I have made a tutorial on that along with the Supco M500. Thanks for watching! Stay tuned for new videos every week🔧⚡️

[@junior74810]

Can one of these pumps be converted to single phase? Thank you!

[@rajeshparamunsee6532]

Brilliant stuff

[@gedyx]

Hey buddy what should be expected when starting a 3 phase scroll compressor?

[@gedyx]

Low pressure differential or high pressure differential?

[@timcordero8453]

Excellent content thank you very much

[@Rubensandoval310]

Nice explanation

[@JumpermanTech]

Thank you very much! Appreciate your feedback🙏 Stay safe out there & stay tuned for new videos every week🔧

[@sfchannel764]

Hello sir, if we want to check winding.. Power suppy need to be on or off?

[@nickbarnes9347]

Off

[@MegaIsok]

Would you check the amp draw on a compressor to get a more in-depth diagnosis of its condition?

[@WillieMakeit]

Not if it's shorted. If it works you could check each leg with a megohm meter

[@Sc19869]

What is a 3 phase compressor and what is a single phase. Appreciate your knowledge and videos. Also when you mean check the compressor for ground, is that a short?

[@johnbrewer1234]

OL = Over limit. Good concise video sir

[@AlexLopez-rn4ex]

On a three phase compressor the windings always read the Same resistance. if the compressor is good.

[@DavidBeckett-xz4lh]

Are the earth and neutral combined.

[@Nab-Asn2803]

Great vedio jumperman tech

[@airtechnologygroup1738]

Thanks for simple explanation.

[@JumpermanTech]

You're very welcome & thank you! Appreciate the feedback. Stay safe out there & stay tuned for new videos every week🔧

[@JacksonAndrews-gn8bk]

Save your sandpaper and use that ground wire right on the compressor

[@JumpermanTech]

Good tip👍 Thanks for watching! Stay safe out there & stay tuned for new videos every week🔧

[@robbyclark6915]

That’s fine but what IF all the windings do NOT read the same resistance? What does that mean? 🤷🏻‍♂️

[@Four_leaf_Lord]

Depends on if it’s 3 phase or single phase in this instance if he got like a 1.9 the windings would be bad

[@mickeylojkar5769]

So if one winding don’t read the same, isn’t the terminology called shunted windings of the compressor?

[@CG-qc1ob]

I got resistance only on S+R but not resistance on the other ones

[@JumpermanTech]

So from C-S & C-S you're getting nothing? Are you getting an O.L reading?

[@CG-qc1ob]

@@JumpermanTech yes getting LO reading

[@JumpermanTech]

@@CG-qc1ob You may get an OL reading when the compressor is hot and went off on the internal overload. Check again when the compressor is ambient temperature to confirm but it's looking like a bad compressor so it's time to replace it. Thanks for watching!

[@JumpermanTech]

@@CG-qc1ob Stay tuned for new videos every week!

[@CG-qc1ob]

@@JumpermanTech Thanks 😊 I just graduated from trade school. At first unit wasn’t getting any power at all, it was the breaker, then bad capacitor, changed capacitor, everything turned on except the compressor. My diagnose was bad compressor . Thanks for your videos and and respond. I hope you have a video how to turn an ecm motor to psc motor using just relay thanks 🙏🏻 again

[@hafizulilmi1476]

Is there any case there resistances for all windings but inequal?

[@JumpermanTech]

For 3 phase compressors, that might indicate you have an issue. To go further in depth, use a megohmmeter to test the compressor. I just made a video on that last.Stay safe out there & stay tuned for new videos every week🔧

[@ishworibdrniroula2150]

thank you dear

[@zoshimuddin5263]

Good xpalandt sir

[@izzybell11]

Interesting subject and well explained. Thank you for sharing your experience with us. Good job. ⭐️⭐️⭐️⭐️⭐️

[@JumpermanTech]

You're very welcome & thank you for sharing your feedback with me🙏 Thanks for watching. Stay safe out there & stay tuned for new videos every week🔧

[@qarayen1725]

Is it possible to test the running using single phase and a capacitor ?

[@JumpermanTech]

What do you mean exactly by that?

[@UltraHydrophobiccoat]

Why manufacture 3 phase compressors instead of one phase?

[@ridered03cr]

3 phase is more for commercial. Though you can do 3 phase for your residential home, I just don’t see why you would really need to. It’s also more expensive. 3 phase compressors draw a lot less current than single phase. So you can achieve the same tonnage with less power. They have much more starting torque as well, meaning you don’t need to run a capacitor or a start capacitor for the compressor to run. They also last longer too. Hope this helps.

[@justinwallace390]

@@ridered03cr Thank you for that info

[@babaolowo35]

Nice one

[@lakhpatsingh6412]

How to check amps

[@justinlynn7315]

Good video. O.L. is actually Over Limit which means that the value is over the measurable limit. Such as what infinite ohms would be if there is no continuity to ground

[@scottshawn70]

Technically it does not mean “over limit” it means open loop or open line to signify there is no continuity. When checking continuity you are checking if there is a closed path for current.. or if it’s “open”.

[@jollyscaria1922]

Sound ohms showesing good no grunde

[@pianduchuance859]

Good

[@wd8557]

Next time use a megger and check the insulation.

[@JumpermanTech]

Great tip👍 Just made a video on that! Appreciate the feedback. Stay safe out there & stay tuned for new videos every week🔧

[@jabroski69]

Comment

[@harryschrysan3183]

I have a question. Today I was diagnosing a compressor for a mini split that was making weird noises and after 3-4 seconds it stops on thermal overload. I took the resistance on the 3 terminals and all were the same resistance. But when I was checking each to ground I had continuity. I was buffled because I know a grounded comp trips the breaker but this one would trip the overload plus it would try to start for a few seconds. I read the diagram and it seems to be a star winding configuration. My boss told me that those comps are by default grounded. It's the first time I have seen this. Is it for real? I am questioning my boss's knowledge atm 😅