HVAC Training: How To Check A 3 Phase Inverter Compressor (DC Compressor Troubleshooting) Testing

HVAC Training: How To Check A 3 Phase Inverter Compressor (DC Compressor Troubleshooting) DC Compressor Insulation Resistance / 3 Phase DC Compressor Check / 3 Phase Inverter Compressor Check / Test / Troubleshooting / How to check a compressor for any grounds / How to check the windings of a single phase compressor / How to check resistance of a single phase compressor / How to ohm out a compressor / How to read ohms on a compressor / How to check the windings of a refrigeration compressor / How to test for bad compressor / Ohms test with multimeter / Troubleshoot a grounded (Shorted to ground) Compressor / How to test a compressor - HVAC / How to test a refrigeration compressor / How to troubleshoot a 3 phase compressor using a muli-meter / How to check the windings of a 3 phase compressor / How to check resistance of a 3 phase compressor / Single phase vs three phase #HVAC #VRF #COMPRESSOR #JUMPERMANTECH
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[@R290s_biggest_fan]

3 phase motors don't have a common, start, or run terminals. All 3 phases are energized at the same time, and the motor rotor "chases" the phases around the stator.

[@seymourwrasse3321]

don't confuse him with facts, he wouldn't have lasted till lunch his first day on any job I ever worked

[@rv10flyer84]

Yeah Einstein, anyone of us that has been in HVAC tech school or a service tech that learned OTJ knows that. Your C, R and S terminals on a PSC compressor are all three energized at the same time too.

[@JumpermanTech]

Please note that the power source should be disconnected & the compressor should be isolated with no wiring connected while testing continuity or resistance. When checking amperage, the power must be on for the compressor to start. Thank you all for watching & commenting!

[@takethe101totarzana4]

Excellent video. Well presented and explained. Thank you for posting.

[@kennethlobo4420]

Thank U these educational videos helps a technician a lot

[@JumpermanTech]

You're very welcome & thank you! I'm glad these videos help🔧⚡️

[@jrh86]

Concise and very informative as allows without the flim flam 💯👍👍👍

[@zack79tampa32]

Thanks JMT there is value in all your videos keep up the good work man and stay safe!

[@nicolerennie]

love your training videos. great explanations & easy to follow. thanks for sharing the wealth!!

[@JumpermanTech]

Thank you! Glad you enjoy the training videos. Appreciate the feedback🙏🔧⚡️

[@luiszar3085]

gracias señoron

[@izzybell11]

Interesting video. Well presented and explained. Great job JMT as always

[@JumpermanTech]

Thank you! I'm glad you found this video interesting & well presented. Stay tuned for new videos every week🔧⚡️

[@Remy-bm2jh]

Thank you brother loving your videos!

[@JumpermanTech]

You're very welcome & thank you! Glad you're loving the videos! Stay tuned for new videos every week🔧⚡️

[@PopeyeBHR]

love your videos bro very informative.

[@mikeoneal3550]

Great video!! well done

[@Eddy63]

Now that's how you do it ... Nice explanation ... Thx

[@JumpermanTech]

You're very welcome & thank you! Appreciate your support 🙏🔧⚡️

[@jimmyrodriguez7246]

Excelente vídeo

[@JumpermanTech]

Gracias!!🙏🔧⚡️

[@bubby-oq5xf]

Wow what a great great video well done Luis Chicago

[@JumpermanTech]

Thank you Luis! Appreciate the feedback🔧⚡️

[@scottmaz4063]

Very very great video

[@JumpermanTech]

Thank you Scott! Stay tuned for new videos every week🔧⚡️

[@terryh8421]

Thanks, good video.

[@brettmullins751]

awesome video

[@JumpermanTech]

Thank you! Stay tuned for new videos every week

[@gregoriocampo]

Great video

[@JumpermanTech]

Thank you!!

[@abushahma1857]

Great video. From india

[@nakiapringley5391]

Great video bro

[@zekenzy6486]

Great Video. Thank you for sharing. What's voltages 3 phase inverter compressor use 120 V or 208 V or 240 V ? Is this compressor come from VRF Muti V condenser unit ?

[@oldmetalguy4577]

And of course, Jumpermantech always has an inverter compressor in stock. Thanks LG. LOL!

[@JumpermanTech]

I had 6 LG BAD inverter compressors that I had replaced in my house. Had to do a little spring cleaning but I saved one for videos 😂 Thanks for watching & commenting!

[@jixia676]

Thanks for the upload. I have a question. You said measure AC current on DC compressor. I always thought it should be DC current on DC compressor. Do you know why it's AC current? Thanks.

[@Adi-md8uk]

excellent explanation and a great video thanks.

[@JumpermanTech]

You're very welcome & thank you very much!

[@jasonjohnsonHVAC]

Below 30 megaohms is not always an indication of a failed compressor. I can only speak of knowledge specifically a Copeland. AE BULLETIN 1294 covers this topic. A Copeland scroll can have a megg reading of 0.5 megaohms and still be an operational compressor. A lot of other factors also contribute to a low megg reading....temp, moisture, contamination....a better way to look at a megg reading is if it goes up...then starts going back down. You should also use the PI ( Polarization Index ) or DAR ( Die Electric Absorption Ratio ) tests, they are a timed tests and produce a ratio based on sampling meggs at different intervals. Im not saying that compressor wasn't failed. Just wanted to share a little info.

[@rv10flyer84]

Anything below 250,000 ohms indicates the compressor needs to be replaced from what I learned in school.

[@chrissipple1018]

I have always read that you never check a inverter dc motor with a megohm meter. It does not mater what size the inverter motor is, there all 3 phase windings.

[@louievil713]

I'm getting the exam exact reading 15.7 across all three legs but when it calls for cooling the compressor cuts on but my low side and high side are staying equalized at 290 they are not adjusting

[@AshAirheart1995]

I have a question. I have this compressor, a spiral condenser, a water regulating valve, and 2 txv. I saw something strange that I didn't understand. When I started the system the whole compressor was hot and the receiver was cold including the liquid line by the filter. The bottom txv was frosting at the outlet side just a bit and after a few seconds I saw it instantly melt away. The compressor made a funny sound and the suction pressure when up from 6psi to 60 psi. I'm a new tech so this is all new to me. Why do you think that would happen? I think there's a blockage in the system and I was close to witnessing my first liquid flood back. Do you think there's air in the system? Possibly both?

[@agostinhomartins8373]

Possibly a blockage or maybe overcharged. Did you get an amp reading from start up?

[@MusIpad-yf1we]

Should you recover refrigerant when testing with a Megaohmmeter

[@LC-qi5ff]

No but if there is a lot of liquid in compressor it can give a false reading in megger test

[@thesilentonevictor]

Class in session

[@JumpermanTech]

That is correct! Haha thanks for watching!

[@richardperrin391]

3 phase doesn’t have a start and run winding

[@jasonjohnsonHVAC]

And VRF always labels them U,V,W....its all the same thing in essence. It is misleading calling it a start and run winding. They have different resistance values....hence why a capacitor is used.

[@harrydickson4575]

👍👍👍

[@JumpermanTech]

🙏🔧⚡️👍

[@minseoplee5576]

I`m korean video great`s

[@ilisaneleazar]

Sir good day sir can I ask a favor I'm a aircon maintenance in university here in Philippines sir the one of ACU LG Multi V 5 is not running but no have indicate error sir and the out door is not running what is the problem this sir? I hope you read my message for you thank you so much sir.

[@LC-qi5ff]

Check for power

[@ilisaneleazar]

@@LC-qi5ff thank you sir

[@ILoveKittys78]

😻💚💜💚

[@JumpermanTech]

❤🔧⚡️

[@rameshkanth.g9788]

Hi sir I'm HVAC SUPERVISOR Plz request help me My side have LG inverter package unit discharge pressure 220 coming that time tripping unit 3 phase plz help me sir...

[@sawdust85222]

Enjoy watching your videos. However i would encourage to to do a little more research, may be judt a vocabulary thing. When you check the resistance of the motor winding that will give you a resistance value in ohms it also is telling you whether you have continuity or not, essentially they are one in the same. Another thing to mention is that when dealing with a 3 phase motor you DO NOT have a start, common and run windings.

[@chrisgonzalez5599]

Dam man your fucking bad ass 💯💯💯💯💯💯💯💯