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Robin air cool tech ac machine loses refrigerant during vacuum and when draining oil it freezes the oil recovery tank outside of the machine.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: AC WON'T COOL

Sounds like you have a freon leak or your compressor has stopped working. You will probably need a service tech. If it is out of freon, don't let them just add more freon, make them find and repair the leak first. Good Luck.

Posted on Mar 27, 2008

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mhkamran
  • 180 Answers

SOURCE: refigerant in oil recovery bottle

You have to change/rebuild oil drain solenoid & check oil drain check valve.

Posted on Sep 09, 2009

mhkamran
  • 180 Answers

SOURCE: Cool Tech 34700Z Recovery, Recycling, Recharging: when performing a/c system charging see bubles in ...

Pls Check oil drain solenoid it's may need to rebuild or replace.If solenoid is OK then you may need to change oil drain switch.

Posted on May 20, 2010

mhkamran
  • 180 Answers

SOURCE: Cool Tech 34700Z Recovery, Recycling, Recharging: when I have the system in a vacuum the liquid freo...

I don't think your machine have any problem! But if you are sure then you can rebuild oil drain solenoid.

Posted on May 20, 2010

  • 6 Answers

SOURCE: Had a ac tech service

It may not help but it sounds like the tech took a control wire for the cooling circuit loose at the indoor air handler/furnace so that he could bring the heat on to check it, and forgot to hook it back up. That may not be the case, but if it is it wouldn't be the first time. Due to the possibility of electrical shock, and the uncountable number of system configurations I wouldn't be able to tell you how to check it. Even the best tech's make mistakes, and if they have any integrity they won't charge to come back to fix.

Posted on Sep 02, 2010

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1 Answer

How to drain the isv in ac34700z


To clean contaminated ISV of Robinair 34700Z, open front lower panel, then slowly disconnect 3 hoses from ISV (Liquid, Air purge and Vapor). Now unscrew ISV tank from machine and then fixed an adapter to Liquid port of the tank to allow all the contaminated refrigerant to go out from tank. after emptying the tank, if possible make vacuum for approx. 10 minute with an external vacuum pump. Replace everything its original location after completing vacuum. Now change spin-on filter (Located on the back side of the machine) and vacuum pump oil. Your machine is now ready to work.
Thanks and I hope this will help you to solve your problems.

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On pulling a vacuum the machine dumps 1.5#s of refrigerant


Check oil drain solenoid for any debris or damage inside the solenoid flunger. Replace/rebuild as needed. Hope this will solve your problem. Don't forget to vote for my solution

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34700 unit when in the vacuum mode it sends R134 into the oil recovery bottle tank


Please check oil drain sensor(switch) or oil drain solenoid for any debris. If both are check OK, then check Vacuum,Recycle and charge solenoid for any debris or damage. Replace/rebuild as needed. Hope this will help you

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2 Answers

Cool tech 34788 purges alot. Excessive purge time and set error messages for being unable to purge.


Please check 1# The refrigerant which you'v add to the machine, it may CONTAMINATE or NOT PURE R134a. the machine will purge continue while active VACUUM mode if refrigerant is not origenal ! Identify refrigerant if possible.2# Check the automatic air purge device & air purge solenoid repair or rebuild as require

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1 Answer

I have a Robinair 34700, during vacuuming and recycling I lose about 200 g refrigerant gas.


Don't worry this is normal.Because while machine is running for vacuum or recycle mode,automatic air purge device will active for some time & it will purge air from ISV.

May 28, 2010 | Robinair Cool Tech 34700Z Recovery,...

1 Answer

I have a robin air recovery station for R12, My Question is Can this machine be converted to recyled 134A, By changing the filters? Email to tdrworks@yahoo.com I thank you in advance. Sincerely Santos


Sorry you can not make this only with changing spin-on filter.because have to also change other things such as service coupler,ISV tank,manifold gauge etc.

May 21, 2010 | Robinair Cool Tech 34700Z Recovery,...

1 Answer

Cool Tech 34700Z Recovery, Recycling, Recharging: when I have the system in a vacuum the liquid freo...


I don't think your machine have any problem! But if you are sure then you can rebuild oil drain solenoid.

May 17, 2010 | Robinair Cool Tech 34700Z Recovery,...

1 Answer

Refigerant in oil recovery bottle


You have to change/rebuild oil drain solenoid & check oil drain check valve.

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If the clearing the filter screen will not go off then it is sure that compressor is not good.please check the compressor with vacuum gauge & make sure is has 13" HG of suction.

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Air condition freezing up


Make sure the condensate drain is clean and clear of any debris. With the indoor unit off, Remove the inspection panel and pour a gallon mixture of 10% Bleach to Water solution in the drain pan. Do not overflow the pan but check to make sure there is flow to the outside or drain. Clean out the drain hose if you have to. A freezing coil is a sign of either not enough air going across it or not enough charge in the system. Check to make sure all of the return air vents as well as supply vents are in full open and unrestricted. If they are, you will need to have the charge checked. If this turns out good, have your technician install an anti-freeze kit. This kit will temporarly turn off the compressor unit for a short period when the sensor in the kit experiences a freezing condition. Then after a bit, it will turn on the compressor. It may not cool as much as it was, but it may get you thru. Good Luck!

Sep 14, 2007 | Heating & Cooling

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