Compressor failure 1 - HVAC Online Training and Courses

In this video, I describe one of the many things that can make a compressor fail. I explain all about flood-back and Slugging, as well as what does it mean "flooded start."
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[@joshemajavich799]

Hola Julio saludos desde Miami que tengas feliz navidad junto a tu familia y agradecido de tus enseñanzas on HVAC.

[@AirConAcademy]

Muchisimas Gracias!!! Feliz navidad a usted y a tu familia!!!!! Que el proximo ano le traiga muchas felesidades!!!!

[@BigSad49702]

Once again you’re an amazing instructor

[@michaelhipshire308]

Im currently enrolled in an hvac program. Your videos and explanations are fantastic and have helped me to better understands these systems.

[@AirConAcademy]

I am so glad I can help!!!! I hope your classes go well!!!

[@barrybigelow4259]

should have worn a green t-shirt, off to college now to take a course to figure out what you said, good video

[@AirConAcademy]

lol Thanks!!! I am glad you liked it!!! and thanks for watching!!!

[@ghulamabbasbhatti3048]

Dear Sir, I am very thankful to you for uploading very informative videos. Sir, I have a Copland Hermetic Compressor , for cold room. but it makes ice on compressor and Evaporator with in two to three hours. filter , T xv And Orifice I Already replaced.

[@AirConAcademy]

What is the temperature of the cooler? It may have defrost controls that are not working. CHeck the superheat it should have superheat maybe 8 to 12 degrees of superheat.

[@engineeringtrainingideas2334]

subscribe my youtube chaannal bhai

[@randypatcho6051]

Thanks for the knowledge you shared sir new subscriber here👍👍👍

[@AirConAcademy]

Thank you so much! I hope I can keep making more videos for you guys and I hope they keep helping you out there and I hope you're making lots of money with this knowledge! Thank you for your comment and keep learning!

[@lexikate-04]

Thank you. Now I know the probable cause of compressor breakdown sir..this informative videos will save refrigeration system in any kind of vessels:)

[@AirConAcademy]

wildan sajise I am so glad I could help.! That is one of the main reasons I do these videos is to help you guys out there! Thank you and good luck. Any questions or suggestions please send them to me. Thank you!!!

[@tantanbernal8244]

Tnx a lot sir.. Very good explanation.

[@AirConAcademy]

Thank you!!! i am glad you liked it!

[@kennethlobo4420]

Thanks for this video i have experienced problems similar to what U mentioned. Could U s upload a video on How to check a reverseing valve on a heat pump and the flow of refigerant in both modes.Thanks .Am from India.

[@AirConAcademy]

ohhh yes I will do one for reversing valve troubleshooting. Thank you!!! From India!!!??? Great thank you!!!

[@mushtaqahmad7897]

Very nice sir

[@AirConAcademy]

Thank you so much! And thank you for watching!

[@eduardofranzoni5143]

Awesome class! Congrats! Quick question: can excessive manual hot gas defrosts (due to frozen evaporators coils) cause flood back or slugging on the compressor? Thanks?

[@AirConAcademy]

When we did Hot gas manual defrost I was careful to not get liquid back. it is a guessing game I guess. but YES you can. glad you are being cautious! Thank you for watching!!!

[@rajivrana133]

Very nice 👍 and very good teacher

[@AirConAcademy]

Thank you!!!!!

[@steve19841117]

thank you MR . very good video. if you can can you make a video for icemachine harvest cycle . how does it works. i will appreciate you so much.

[@AirConAcademy]

That is a bit more complicated!! but I will try! thank you !!!

[@steve19841117]

@@AirConAcademy thank you very much

[@pritambiswas7923]

Than you for the video sir. I have a ice plant of 1TPD. Here the oil pressed is decreasing day by day 40 psig to 10 psid respect to suction pressure after that the compressor triped. I have already repaired the compressor after repairing the diffraction between suction and oil was 40 psig it was perfect. After 60 days the pressure difference come to 10 again teipping starts. How to fix the flood back probelm even super hit also adjusted?

[@AirConAcademy]

I am not sure I totally understand. You do need to check and adjust your superheat. With superheat you will not have flood back. You also need to make sure that you have enough pressure difference between your high and low side pressure. If you do not have enough pressure difference your oil is not going to come back which means that your oil pressure will drop. If you're having a problem with oil returning check your pressures. If you have enough oil and it is not building up pressure it could be like you said flood back. Or maybe a bad oil pressure switch or a bad oil pump. With the little information that I have it is hard to diagnose properly. But check those things that I mentioned above.

[@ebbyt00]

Thanks for another good video, a question about a very low-pressure system, how do we attach the gauge/hose without introducing air to the suction line, normally this type of system runs at a vacuum also when the system is off which it goes to pump down at stays at vacuum

[@AirConAcademy]

That is when having a valve as a low loss fitting works great. Because you can close off the valves and you will not pull in any air from your hoses. But that is tough not introducing air into the system

[@vahagnmelikyan2906]

Thanks I found my answer.

[@AirConAcademy]

HA HA great!!! I'm glad I could help! Glad you like the video!

[@syedbasheer8210]

Good explanation..thanks

[@AirConAcademy]

Thank you!!!! I am glad you liked it!!!!

[@anvibrimel41]

Thanks a lot for this teaching but I have a question what is the proper way to check refrigerant charge on R22 and R410A split systems when out door temperature is between 40 and 65ºF with Systems with TXV and Metering device I have been asking this to a couple of technicians and they told me that is the customer don’t complain about anything not to worry about it but many times I see very strange pressures and temperatures an many times not the right Superheat or Subcooling Thanks for your help,God bless you and your family

[@rabeaezzategypt561]

thank you very much

[@AirConAcademy]

Thank you for watching!!!!!

[@مهدیرمضانی-م1ف]

عالی مهندس 🙏🙏🙏🙏🙏💙💙💙💙💙

[@MansourGhadhban]

Very wonderful

[@AirConAcademy]

Thank you so much! Thank you for watching!

[@lubime10]

Excelent !!!

[@AirConAcademy]

Thank you!!!!

[@prithwishdey6708]

Sir details explane when overhauling compressor like discharge, suction valves, valves plate,rid,oil pump etc how they works and how to refrigerant suc and discharge.

[@ltperaal897]

please a video about smoke detectors wiring and vacuum procedure

[@AirConAcademy]

I will make a note and will see what I can do about those videos thank you!! where are you from?

[@ltperaal897]

El Salvador, I'm working in ac company, mostly commercial installations. my whole experience is 6 months

[@TanweerAhmed]

Informative

[@jamesrothwell1738]

Many freezers run -10° coil temp

[@AirConAcademy]

Yes! Absolutely correct. Like I tell people in class, all of the components are the same and they will fail for the same reasons. By adjusting the pressure we can change the temperatures. So yes, some phrases that run at -10°F and some refrigerators for candy and flowers run higher than your typical air conditioning evaporator coil. Maybe I should do another video talking about different temperatures and pressures. You just gave me an idea. Thank you so much! And thank you for watching!

[@profuse007]

So at PDP, it's 100% vapor (0% liquid). Through the spring and summer season (and the equipment is in tip-top shape), does the compressor ever receive any liquid (e.g. 0.001% liquid) at all?

[@AirConAcademy]

Very good question! If we have superheat the compressor will not have liquid come to it. That is why in class I always tell the guys make sure after you hook up gauges you check your superheat. Superheat will tell you what is going on in the system and you also need to check the sub cooling. Liquid should not be coming back over to the compressor! Thank you for your question!

[@profuse007]

@@AirConAcademy so when the fluid goes back into the compressor, do we say it's "saturated" vapor or "superheated" vapor? I heard people uses the term "saturated" vapor, but saturation means that there two things/phases in a mix. Superheated vapor means to me that it's just vapor, no liquid. may be I'm not understanding the different terminologies being use

[@AirConAcademy]

@@profuse007 saturated means that it is a mixture of liquid and vapor. When refrigerant comes back to the compressor it needs to be low pressure superheated vapor. The refrigerant in the evaporator, the first 3/4 or so of the evaporator will be saturated and then in the last quarter or so the refrigerant Will start to superheat so that it is super heated when he gets to the compressor. I believe I have a video that talks about this. Take a look and if you have other questions let me know.

[@profuse007]

@@AirConAcademy thank you so much

[@karthikkeyan7010]

Are u realy writing on the board on reverse direction or then how it possible

[@AirConAcademy]

ha ha I used to do it like that but now I flip the video. BUT yes I can write with both, the right and the left hand and backwards with both. The Good Lord has blessed me like that! lol

[@scwarr]

good

[@AirConAcademy]

thank you!!!!

[@ericktandas6588]

How to know exact length or diameter for a metering device like capillary tube for a certain capacity?

[@AirConAcademy]

ohhh That is something that it is not easy to do because there are a lot of inside diameter that are sold and each has its own length depending on the manufacturer. I am sorry but there is NO easy way to do this. I will make a video talking about it. and explaining more I am sorry there is no easy way to do this.

[@vahagnmelikyan2906]

What values you would have if it was not charged enough?

[@AirConAcademy]

I think you said you found your answer lol !!!!

[@vahagnmelikyan2906]

@@AirConAcademy so it would be excessive superheated before entering compressor if it was under charged?

[@AirConAcademy]

@@vahagnmelikyan2906 yes! If you do not have enough refrigerant in the evaporator your superheat will increase and possibly allowing the compressor to have a high temperature which could cause the compressor to go out on internal overload. That is why it is important to always check the superheat. And always know what the manufacturer suggest what the superheat should be. I hope this helps!

[@vahagnmelikyan2906]

@@AirConAcademy so if I have a unit without any information about it's refrigerant amount how do I figure out how much I should add.. How much superheat is too much?

[@AirConAcademy]

@@vahagnmelikyan2906 I am not sure at the moment if I have a video that explains the metering devices. To know if you have enough refrigerant in the system you first need to know what type of metering device you have.. If you have a TXV that will maintain constant superheat so you must have a good amount of subcooling. A good amount could be considered between 10 to 20° of subcooling. If you have a fixed type metering device like a capillary tube or a piston/fixed bore then you would need to charge it according to the superheat. Typically in class I tell everyone 8 to 12° of superheat is a good rule of thumb. I hope this helps. Just remember if it is a package unit then you would want to charge it by weight. Which means that you would have to look at the model number of the unit and download some information on the unit to see how much refrigerant you should add. But when you charge by weight the unit must be empty and you must have had a good vacuum on it meaning 500 µm before you add the suggested amount of refrigerant by the manufacture specs I hope this answers your question. If you still have questions please let me know! Good luck out there!

[@oragonrepublic4639]

how to measure superheat

[@asifjutt8824]

👍