Technician Training Series: How to use the Robinair 34788 Air Conditioning Recovery Machine
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- เผยแพร่เมื่อ 15 ต.ค. 2024
- In depth training on the operation of the Robinair 34788NI recovery machine. In this video we cover the recovery, recycle, evacuation of system, leak testing, and recharging. If you have any questions please feel free to leave them in the comments! If you want to know how to use a robinair ac machine, this is for you. Please like and subscribe for more content!
Video on how to maintain this machine: • Robinair AC Refrigerat...
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Great video! Just watched to see if I was missing anything but that’s how I use it. You are 100% correct on the vacuum leak test. It’s correct about 50% of the time. I always inject the dye on a low or no Freon system and locate the leak the old school way.
It will miss leaks that present on pressure 100% of the time! Dye is the way to go for sure. Thanks for watching!
Thank you so much 🙏 its a great video you’ve helped me alot. I just got my RobinAir machine and didnt know how to use it. Thank man God bless you🙏 keep up with the great videos👌
Glad to help!
I have this machine. I used it yesterday for the first time and was not able to get my A/C to come back on. (yes, it did work previously so I know the switches and sensors are all functional). The reason I recovered refrigerant is because the compressor was periodically seizing up with broken belts resulting.
So, I recovered the refrigerant and took the system all apart and replaced the compressor (clutch included), the accumulator, the condenser, and the compressor mounted clutch switch.
After getting everything back together, I vacuumed the system, injected 3oz of pag oil with a spotgun, (the new compressor came with 8oz in it and the system calls for 11oz total), and hit a problem:
I didn't know which charge path to select: High, Low, or both. I selected high and low, just guessing since the robinair owner's manual doesn't say, which really sucks. There should be specific instructions for what instances to use each charge path.
Anyhow, I suspect I made a mistake in selecting high and low charge paths. The vehicle was NOT running at the time it was charging.
After completing the charge, the machine prompted me to do the hose equalize, which includes starting the car and turning on max AC. This is the point where I knew I had done something wrong, because the AC would not come on. The clutch did not engage, not even for a split second. I checked every fuse and relay. They were all good.
One possible symptom of what I'm guessing was a mistake was that when I disconnected the high side hose from the service port, the schrader valve failed and refrigerant was hissing out like crazy, so I snapped the service hose back on and had no choice but to recover the refrigerant again. The valve failing may have been a coincidence, IDK. I'm looking for your expertise for what went wrong.
So In summary I have two questions: What charge path should I have selected with the vehicle NOT running, and Is it possible that The high side service port valve failed because I screwed up?
And two comments for Robinair or anyone who works for Robinair: Your owners manuel Fails to mention two critical things: How to know which charge path to select, and that the machine is capable of injecting pag oil while it recharges. I bought a $100 spotgun because I didn't know it could perform this task. Maybe put somthing about that in your freaking owner's manual?! Thanks.
BTW, I was working on a 2001 GMC Yukon XL 1500 Denali w/rear AC. the system calls for 11oz of pag46 and 48oz of refrigerant if that helps anyone.
Thanks in advance for any help you can give me.
If the vehicle is off you can select either high or low side. If the vehicle is running with the a/c on, you have to select low side because the machine cannot handle the pressure the high side reaches. To do the oil injection, you must vacuum the system first. When you select the charge option, it will give you the option to oil inject. Also when charging or recovering, never select the POE option unless you have an electric compressor, like ones on an electric car or hybrid. Also, if you have a faulty compressor, it is good practice to replace the condenser, orifice tube, and accumulator, with a good system flush. This makes sure there are no metal particles left in the system, which can damage that new compressor. Good luck with your repair, and thanks so much for watching!
@@AutoScholarwithMrB Thanks for this video, very helpful. I got 2 questions: 1- before connecting the hoses to the service ports, don’t you have to “Purge” the hoses again to get rid of any air or refrigerant left in them?
2- If I need to use this machine to inject POE for an electric AC compressor, from your experience, do we have the flush the PAG oil hose inside the machine to clean it from any PAG oil residue? How would inject POE Oil using this machine? Would you please explain in details, Thank you. Ed
@@edlopz1722 use the recover process to purge the machine while it isn’t hooked up. It will recover any refrigerant left in the lines. Also, when charging, the machine will ask if it is a POE system. You would just follow the prompts from that point on.
@@AutoScholarwithMrB Thank you, I will give it a try.
Can you go into more detail about charging low side vs high side? I’ve always charged both sides at once with the vehicle off
Great video and very helpful so thank you. When the machine does the recovery process does it store the gas and then put what it took out back in when recharging? If for example the car holds 500g and there was 300g taken out at recovery, do you only actually use 200g of new gas ? Also is there a way that you can just recover gas, for example if you are removing an engine ?
yes and yes. that's the great thing about these machines, you don't lose freon, especially with the costs now. plus it's illegal to release r134a into the atmosphere.
I have one of these machines and have found it's not properly recharging, what parts cmshould I look at to get it charging properly?
do you have video on how to refill the machine with Refrigerant when the machine is low??
How does this machine pull the oil out of the system when my vac. Pump never pulls oil out when I evacuate the system????
Because your doing it wrong lmfaooo
Good job Mr.B! 😉
Whats the difference between hose equalize and hose compensate?
I do the whole process with that same machine and my car is not cooling, and there is no oil leak, which may be the problem or what is going on, my car is 2013 Hyundai Tucson, thank you for answering me
Leo body Shop Zaldy the compressors on those go bad all the time, what pressures do you have? Is power getting to the compressor?
not only pressure problem and oil there are alot that can cause that.
Have the same machine. Only used twice so far. Both times no oil was recovered from fully charged systems. Is this normal?
@@DSE3027 somewhat. It won’t have oil in the bottle every time.
Thanks
This helps a lot. Thanks
Excellent video, Thanks
just wanna ask what if refrigerant is purging or leaking at the back of the ac compressor what will be the next step?
My AC system is empty. A friend accidentally hit the line from compressor to the condenser so all the refrigerant leaked out.. pssschh it sounded.. it was warm and a little bit hot actually.
So.. ive fixed the broken pipe. Hows gonna be with the oil situation and the recovery process then when the machine can't sense a pressure?
How to know how much oil I've lost and how much to put in now? The line i replaced is like 30cm.
If there is no pressure, there is no need to recover. Start at vacuum, leak test, oil inject (if oil was lost) and charge. As far as estimating oil loss, I would maybe add an ounce of the discharge left an oily residue. Thanks for watching, and sorry for the bad luck!
Excellent video
Thanks for watching Matt!
Thank you Mr B , We have the same equipment at our shop . I installed a used compressor and the system says No flow when I try to charge
I have never had that happen. Do you mean you replaced the compressor in the Robinair machine or on a car?
@@AutoScholarwithMrB ,,The compressor is on the Car,,Im not too familiar with this Model RobinAir
I got the same machine what does tank pressure means?
do you have to add oil to separate components when doing an ac kit? our just let the machine inject the factory amount.
You can do either, but it’s recommended by most manufacturers to split up the oil into different parts. Thanks for watching!
So the charge capacity indicates how much the machine is able to charge with its current tank? and the Recover capacity is the limited available amount that is able to be recovered? Am I on the right path here
Bingo!
@@AutoScholarwithMrB thanks for replying! my next question is how do I lower the charge capacity? My understanding is you gotta either transfer it back into the vehicle or into another tank. which function allows me to do that? I'm assuming its the charge button. Sorry for the questions im still learning how to use this machine
@@RasputiaInYourMom yes the only way I know to raise recover capacity is to charge a car.
I put a new tajk in the back does that do the refill and where does the recovered refrigerant go?
You have an internal tank inside that holds the refrigerant.
Dear sir. I would like to get training for repairing ac recycling machine. How can I get? Please reply sir
What training would you like?
@@AutoScholarwithMrB ac recycling machine
How do you get it to drain the oil mine keeps saying 0 oil drained
hpw do you pull freon in vehicle from both hoses if closed off highside line..?
what tank are you using to recover freon from a vehicle and than to recharge the vehicle??
The internal tank in the machine.
thank you i appreciated. @@AutoScholarwithMrB
What do you do when it says high tank pressure
Thank you!
Thanks
That was pretty dang good
Do we have to recover into another tank or will it filter it through the robin air ?
The machine has an internal tank. The fill tank only fills to the internal tank. Thanks for watching!
@@AutoScholarwithMrB thank you ! I appreciate it
Does this machine do Hybrids ? and Those this machine inject the oil ? since you didn't show it on video to inject oil back in
Yes, the oil inject is done when charging. The machine does do POE oils for hybrids too.
@@AutoScholarwithMrB nice thanks
@@AutoScholarwithMrB why is there other machine 34788 in H what would difence
@@MEMIN91911 I’m not sure, honestly. The POE sequence takes a lot longer as it flushes the machine and the vehicle to make sure no other oil gets into the system.
I did a test with that machine doing a vacuum leak test and it kept stopping in the middle of the test is that indicating a leak ? Or is it not supposed to stop ?
Mine has never stopped during a leak. What does the gauge say when it stops?
I did a recover and then pulled a vacuum for about 5 minutes and leak test and maybe half way through the machine stopped and said leak test failed if I remember correctly I don’t think there was anything on the gauges I ended up charging it and the a/c blows cool but it’s not cold as it should be
@@cam8980 yeah it if shuts off during the leak test, you have a pretty large leak
How can you put Freon back in to the car that you took out when you change a compressor
Recover with the machine and then recharge after the repair has been completed, using the charge function. Thanks for watching!
Does this unit have a status indicator light at the top center that light up?
No it does not.
can you run the system with machine hooked up to check pressures
Yes, the machine doesn’t even have to be on for that.
so should hose compensate instead of equalize and leave both hoses connected and monitor pressures to view system proformance@@AutoScholarwithMrB
@@paulinegendreau257 when you charge, and that screen pops up, crank the car and check the pressures. After that you can compensate.
How to use this machine on a vehicle with a newly installed ac condenser
I would apply a vacuum for about 30 minutes and make sure it passes the leak test. Then charge with the appropriate weight. Hope that helps! Thanks for watching.
It’s like being in school again
My machine pulled only about 00.40 oz of yellow dye but no oil, so now what? Do i put . 25 oil and . 15 oz dye back in?
The oil and the dye should be mixed. If no parts are replaced outside of seals or hoses, just put .4 ounces in that came out.
@@AutoScholarwithMrB Thanks for reply.
@@AutoScholarwithMrB Other question: If the machine does not take any oil out during recovery, that means the system does not have any oil in it? Does the machine pulls oil out of the compressor too? The truck i am working with on the manufacturer label say: R134a Charge 29 oz, 0.82 kg, 1.81 lbs. , Now for the Oil it say: 4.23 oz, 120 cc. So, are we adding 29 oz r134a and the 4.23 oz of oil with dye?, that will go over 29 oz... ( i order some oil that has dye in it already - pre-mixed).
@@burnjack291 so normally I put half of the oil in the compressor and the other half I split into two. One I drizzle through the system (a little in condenser, evaporator, and accumulator, and the other half of that half I charge with the machine. That’s normally if I am replacing the whole system which 9/10 times is what I would be doing if a compressor failed. I hope i explained this right as it is hard to put into text.
@@AutoScholarwithMrB Thanks for the reply and explanation. The question still remains, when you do the recovery will the machine take 100% oil out? from the system,compressor... or there maybe some left in the compressor? I have the RobinAir syringe 18465 model - low side, and the markings on them is just confusing and do not match , like on the label on car it say 4.23 oz / 120 cc and the robinair syringe it has this markings: 1/8 oz 3.7ml and 1/4oz 7.4ml and 3/8oz 11.1ml and 1/2oz 14.8ml.
Hello boss I need help asap! My machine is brand new only used twice and now says high tank pressure and asks for a service code. What do I do???
For the service code to begin using the machine, you have to register with robinair on their website. I’ve had the high tank pressure issue once, and I purged the internal tank for about 30 seconds and it fixed that issue.
@@AutoScholarwithMrB yes I know. I’ve done multiple jobs on Diesel trucks and cars. I started it up today and It was reading the sensors and got to ISV Cell sensor and started beeping saying “High Tank Pressure”. The manual then asks for a 5 digit service code and if you hit the exit button it makes you restart unit. How would I go ab getting that service code I’ve necker set one up
@@thekickingguy842 if you just purchased the machine, it will only work for 30 days before it locks out and you have to register it. Robinair has a video on how to do that here: th-cam.com/video/c0jWJe5Dy8Q/w-d-xo.html
@@AutoScholarwithMrB I did that so you’re saying I have to do it again ? I don’t understand why it would lock me out saying high tank pressure when’s it was working fine a couple days ago. I will try this again tho
What oil does it use
For the machine? We use the Robinair service kits that come with the vacuum oil and the filter.
How do I charge on the high side?
It literally explains how to 😂
sir make video for leak diagnose,
Mi maquina se friso porque tiene mucha precion acumulada Como sacarsela
You ded not explaining what to do for relief hi pressure🤔
Where do I sell one of these machines ??
send me info, im looking to buy one
How would i inject the dye in the system with this machine ?
In between the vacuum/evacuation and charge. The system has to be under vacuum before the dye is injected as the vacuum sucks the dye into the system. Thanks for watching!
@@AutoScholarwithMrB Video on how to put the data in the machine to work
How to put dye in this machine video
How to put down with this machine give me a video
Je vais cette machine
Slower in almost every way😂💀
It’s true! The Robinair Cooltech machines that came before this were quicker, but you could apply a vacuum to a fully charged system it you weren’t careful!
Merci !
Thanks so much!
How can you put the Freon back in to the car that you took out
You can press the charge button to recharge. Thanks for watching!