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Had a York chiller tripping on low pressure my instant was it had a leak and was low on gas. That’s until I checked the solenoid. It had 24v power supply but wasn’t energising causing the chiller to effectively pump down and trip on L.P. Solenoid replaced, job done.
Great video as always I’ve never even thought of taking a valve body apart to power it to show my guys what actually happens when the valve opens and closes. I will say that is nice when the solenoid is before the sight glass in the condensing unit but I started installing the solenoid right before the txv in the evaporator because now with microchannel condenser coils being standard, the manufacturers have a recommendation on charge by weight instead of the old school 90-30-1 charging procedure. The first couple microchannel condensing units I did on walk in coolers I overcharged them by about a half pound and mounted the solenoid in the condensing unit and after the fact I calculated it that if the solenoid would’ve been in the evaporator I probably wouldn’t have been overcharged.
You wasn’t lying when you power the coil when its not hooked up. I did that today and it didn’t take long before it started smoking. 🔥 After I did that I was thinking to myself, didn’t I just watch a video on that.
Great video I really like the explanations!!! Question I have for you why would a solenoid valve be really noisy on a walk in cooler? Sight glass is clear but solenoid is really loud ?
How can you install this on a heat pump? If arrow is one way, wouldn't it not work in the opposite mode then? Guess you have to install internal into the heat pump. Do they make a heat pump solenoid?
@@acservicetechchannel Yes I already told my instructors about your channel due to school being shut down for few days because of COVID-19 and they love the content and procedure of your teaching.
hi, i just installed a commercial freezer and my evaporator fans keep turning off and sounds like unit is pumping down, and my sight glass starts to bubble. the coil for my solenoid is making a funny noise. could a bad coil here cause my freezer to shut down?
Do you need to have a receiver tank in the system in order to install a liquid line solenoid valve? This is a rheem 4 ton condenser but does not have a receiver tank only the compressor.
I think I found the answer: Heat Pumps are the ones that require solenoid valve placed in liquid line to prevent off cycle migration. Cooling Units would use an accumulator instead in the suction vapor line. Suction line accumulators should only be installed on systems where liquid flood back to the compressor is highly likely such as long line applications.
The refrigerant bleeds through the hole in the disc and up the slit in the iron core so it is not just the high pressure on one side. Thanks for your support!
![[2019 GUIDE] Troubleshoot a Faulty Reversing Valve Solenoid on a Heat Pump](/img/n.gif)
-Our Website has FREE Videos, Calculators, Podcasts, Articles, Tips, Quizzes, Q/A: www.acservicetech.com
-Facebook Tips: facebook.com/acservicetech
-Tools we use, Our Book, Workbook, and Quick Cards: www.amazon.com/shop/acservicetech
-Our E-book, Paperback, Workbook, Quick Cards, Powerpoint, www.acservicetech.com/ac-book
-Our E-book: play.google.com/store and search "ac service tech"
-Spanish Book & E-book: www.acservicetech.com /store
-Join our updates list for an email strictly from us for new videos, articles, products and website features! www.acservicetech.com
Thank you for doing more refrigeration related videos. So much to learn in this field!! Thanks 😊 for posting!!!
Thanks for watching!
Had a York chiller tripping on low pressure my instant was it had a leak and was low on gas. That’s until I checked the solenoid. It had 24v power supply but wasn’t energising causing the chiller to effectively pump down and trip on L.P. Solenoid replaced, job done.
You mean instinct
Very nice job finding it!
Great video as always I’ve never even thought of taking a valve body apart to power it to show my guys what actually happens when the valve opens and closes. I will say that is nice when the solenoid is before the sight glass in the condensing unit but I started installing the solenoid right before the txv in the evaporator because now with microchannel condenser coils being standard, the manufacturers have a recommendation on charge by weight instead of the old school 90-30-1 charging procedure. The first couple microchannel condensing units I did on walk in coolers I overcharged them by about a half pound and mounted the solenoid in the condensing unit and after the fact I calculated it that if the solenoid would’ve been in the evaporator I probably wouldn’t have been overcharged.
Thank you for putting up a good possible case that is attached to it and how to fix it.
Glad to help!
Great Video I just bought your book it has great information on the HVAC system
About what percentage of bad coils is due to the valve not working properly overheating the coil vs the coil bad on it's own and valve ok?
You wasn’t lying when you power the coil when its not hooked up. I did that today and it didn’t take long before it started smoking. 🔥 After I did that I was thinking to myself, didn’t I just watch a video on that.
Oh no. Hopefully you could get another and get the customer back up and running again.
@@acservicetechchannel Yes, I had some in stock. Best lessons are hard learned I guess.
awesome presentation craig! you teach it so good! thank you so much for sharing.
I appreciate that!
Hey sir how are you doing ?
Will you be have in future about Waking refrigerator systems ? And all about there’s components?
Great video I really like the explanations!!! Question I have for you why would a solenoid valve be really noisy on a walk in cooler? Sight glass is clear but solenoid is really loud ?
great hvac teacher
Question: why do we need the hole in the disc and slit in the iron core?
That is to equalize pressure on both sides of the disc, thanks!
Do you have a video showing how to manually open the body in case the solenoid fails and we don’t have a replacement on hand? Thank you
Looking for more commercial refrigeration videos
Percy, thank you for letting me know what you would like to see!
How can you install this on a heat pump? If arrow is one way, wouldn't it not work in the opposite mode then? Guess you have to install internal into the heat pump. Do they make a heat pump solenoid?
they make a biflow valve that allows in both directions
God bless you sir , I love the way you teach sir pls can you do video on split unit indoor power board repairing.
Francis, thank you for letting me know what you would like to see!
Thanks for explaining
You're welcome
Great Video. Have A Nice Weekend. Thank you for sharing ^_^
Thank you! You too!
The resistance of the coil is also affected by the gauge of the wire in the winding.
Absolutely!
Great explanation 👍🏽
Glad you think so!
I’m a HVAC student at GTC in South Carolina and absolutely Love your HVAC channel and videos! Great job 👍🏽👍🏽👍🏽👍🏽❤️
Thank you very much Ishan! Make sure your instructor knows about us! Thanks!
@@acservicetechchannel Yes I already told my instructors about your channel due to school being shut down for few days because of COVID-19 and they love the content and procedure of your teaching.
hi, i just installed a commercial freezer and my evaporator fans keep turning off and sounds like unit is pumping down, and my sight glass starts to bubble. the coil for my solenoid is making a funny noise. could a bad coil here cause my freezer to shut down?
Good video !
Glad you enjoyed it
Do you need to have a receiver tank in the system in order to install a liquid line solenoid valve? This is a rheem 4 ton condenser but does not have a receiver tank only the compressor.
I think I found the answer:
Heat Pumps are the ones that require solenoid valve
placed in liquid line to prevent off cycle migration.
Cooling Units would use an accumulator instead in the suction vapor line.
Suction line accumulators should only be installed on systems where liquid flood back to
the compressor is highly likely such as long line applications.
Dope
Thanks!
The only one thing I don’t understand. How that small spring and low weight core solenoid can hold that huge pressure?
The refrigerant bleeds through the hole in the disc and up the slit in the iron core so it is not just the high pressure on one side. Thanks for your support!
AC Service Tech LLC thank you for explaining to me.