Thanks always learn a lot from super market guys ! Been a tech since 87 appreciate taking time to show busy all the time. Super market work is two full time jobs. Thanks be safe im out work for work injury knee surgery. Cold now east coastbrrr😯
Great video! I like how Low on refrigerant was last on the list, verifying the compressor itself is in operating condition definitely should always be first…
Number one-zero-fourth sir...👏🕊👍 New fanz here, im your seven-zero-seventh audience for thiz very informative knowledge of world of HVACR...😉 Watchin from ksa to phil... Keep my change later, thankz...👍✌🤟
5:53 - You’re calling this sight glass ‘clear’ even though I see a lot of movement. That would be ‘flashing’ to me. Was that a reflection from something else? Or can you have some bubbles in a sight glass and still call it clear?
Emerson Bulleting AE4-1287 States 292°, 2100 ohms. Yes, I said that right. Lol And, I should add that if you leave that jumper in too long, the module will lockout on “shorted probe failure”. As a proactive measure, reset that switch when you’re done testing. Great videos!
If it’s stuck open then yea that compressor would have a nice ice ball around it. Like any solenoid after so many cycles eventually it could fail internally
I am new on the trade. So I am assuming to do all this valves need to be turn off and pressure blead from the compressor... if this is the case could you show how to and what will be the right procedure. Love your videos
I do it with the compressor running when checking the demand cooling. All valves open to it it’s only when I open the compressor can is when I will shut off real quick checking wiring.. Thank you
Great video. Dealing with this on a large walk in freezer. Tripped twice. But within a day apart. You stated it could be a dirty probe ill check. I know the drier was just changed and heard it was very dirty. So could be. That. Low charge is definitely a possibility too. Started to frost up at the suction drier back to the compressor. Honestly could be a clogged drier again.
Afterhours. In the eastern Sierras or F in Blythe. Comp HAS to run. You don't carry $600 modules. Do you bypass? A boiler control strapped to the discharge line? Who, me?
High temp sensor strapped to the discharge line then ran to the A.I. Point... then run L1 and S on the module to an R.O. point and programing it on a sensor control task? who, Me?
* Replaces case temperature thermistor with potentiometer then dials resistance to a corresponding interpreted temperature of negative eight degrees Fahrenheit * Who me?!?!
Silly question, but demand cooling is basically dumping liquid into the head of the compressor to cool compressor head down due to how much hotter it runs because it’s low temp? And that sensor is reading head temp? Sorry I’m still a noob and trying to learn.
I have 6 R448A refrigeration systems at the facility I'm taking care of. 1 of the systems is randomly tripping on demand cooling. In order to take out the sensor from the head, I saw the valves need to be shut so I'm assuming that means the refrigerant😢😢 needs to be taken out of the compressor before the sensor is removed and a vacuum placed on the compressor once the sensor is replaced? This is a good video btw and one of the most detailed I've found, thanks for making it.
@@refrigerationconfidential4376 ah yeah baby!!! I knew it!!!! Yousa super hero. Really enjoy your content. Just starting out in this field. Seems overwhelming to me right now.
Never done supermarket but I'm addicted to these break down videos 😂
Getting a job doing supermarkets here in Houston. Super nervous. Start Monday. Your videos have been very useful. Thank you
Good luck and remember you are not going to remember everything on the field so write down notes.
ABC magent hack🤣👍 Learned something new with this video. Never seen this demand cooling setup👀 Keep it up brada
Thanks JMT 👍
Thanks always learn a lot from super market guys ! Been a tech since 87 appreciate taking time to show busy all the time. Super market work is two full time jobs. Thanks be safe im out work for work injury knee surgery. Cold now east coastbrrr😯
Great video! I like how Low on refrigerant was last on the list, verifying the compressor itself is in operating condition definitely should always be first…
glad found your channel !!! alot of knowledge and practical everyday troubleshooting
Hope you find the videos useful
Number one-zero-fourth sir...👏🕊👍
New fanz here, im your seven-zero-seventh audience for thiz very informative knowledge of world of HVACR...😉
Watchin from ksa to phil...
Keep my change later, thankz...👍✌🤟
Excellent video. Great job explaining how to test these controls
Sweet video as always
Triffic you should consider writing up a service technician booklet as I think it would be a 💯 winner...I for one would be first in the queue 👍👍👍
Great video. Keep them coming!!!!
Thanks for the support
This was really insightful and helpful 👍🏽
Thank you, having that problem right now with 1 of 6 compressors.
5:53 - You’re calling this sight glass ‘clear’ even though I see a lot of movement. That would be ‘flashing’ to me. Was that a reflection from something else? Or can you have some bubbles in a sight glass and still call it clear?
Thanks so much dude ur the man
Thanks man, nice video and good support
Can we take sensor out when compressor running ?
Great video. Informative 👍
Thank you
Very help full vid...👍
Glad to hear that
Great video!! What temperature should be in the temperature probe for injection soleniod to work?
Emerson Bulleting AE4-1287
States 292°, 2100 ohms. Yes, I said that right. Lol
And, I should add that if you leave that jumper in too long, the module will lockout on “shorted probe failure”. As a proactive measure, reset that switch when you’re done testing.
Great videos!
How can I get that jumper?
Hi may i know why injection solenoid stock on close position thus it makes my compressor formed ice on its body hope you notice my qurries
If it’s stuck open then yea that compressor would have a nice ice ball around it. Like any solenoid after so many cycles eventually it could fail internally
@@refrigerationconfidential4376 the power supply works continously it didnt cut off thanks...
I am new on the trade. So I am assuming to do all this valves need to be turn off and pressure blead from the compressor... if this is the case could you show how to and what will be the right procedure. Love your videos
I do it with the compressor running when checking the demand cooling. All valves open to it it’s only when I open the compressor can is when I will shut off real quick checking wiring..
Thank you
Great video. Dealing with this on a large walk in freezer. Tripped twice. But within a day apart. You stated it could be a dirty probe ill check. I know the drier was just changed and heard it was very dirty. So could be. That. Low charge is definitely a possibility too. Started to frost up at the suction drier back to the compressor. Honestly could be a clogged drier again.
gracias aclare la duda en conexion
Afterhours. In the eastern Sierras or F in Blythe. Comp HAS to run. You don't carry $600 modules. Do you bypass? A boiler control strapped to the discharge line? Who, me?
High temp sensor strapped to the discharge line then ran to the A.I. Point... then run L1 and S on the module to an R.O. point and programing it on a sensor control task? who, Me?
* Replaces case temperature thermistor with potentiometer then dials resistance to a corresponding interpreted temperature of negative eight degrees Fahrenheit *
Who me?!?!
Have to hide the living piss out of the potentiometer. You know, for the next guy/store tech....
Silly question, but demand cooling is basically dumping liquid into the head of the compressor to cool compressor head down due to how much hotter it runs because it’s low temp? And that sensor is reading head temp? Sorry I’m still a noob and trying to learn.
👍🏽 you got it
Did you close service valves when removing sensor?
Yea the compressor was valved off Suction, Discharge, Oil line and liquid injection valve were all off.
@@refrigerationconfidential4376 badass! Good stuff. Does that store require subcooling?
@@refrigerationconfidential4376 i ask because some of our stores have to have subcooling and some can go with out it
@@marktupapi5609 Demand cooling is only applied to R22 low temp due to how much hotter it runs than other gases.
I have 6 R448A refrigeration systems at the facility I'm taking care of. 1 of the systems is randomly tripping on demand cooling. In order to take out the sensor from the head, I saw the valves need to be shut so I'm assuming that means the refrigerant😢😢 needs to be taken out of the compressor before the sensor is removed and a vacuum placed on the compressor once the sensor is replaced? This is a good video btw and one of the most detailed I've found, thanks for making it.
No matter how long it takes for the head cooling to turn on
Is this the same for R22 replacement's?
Yes
Love your videos man but I've gotta ask? Why do you sound like you've been main lining helium for a bit?
Change my voice like Batman so they cant tell who I am...LOL
@@refrigerationconfidential4376 ah yeah baby!!! I knew it!!!! Yousa super hero. Really enjoy your content. Just starting out in this field. Seems overwhelming to me right now.
🙌🙌🙌
That sight glass was not clear lol
They never are 😂