Question about Robinair Cool Tech 34700Z Recovery, Recycling, Recharging

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ROBINAIR 34788 NO MANUAL REFILL

THE MACHINE WILL NOT DO A MANUAL REFILL TELLS US SOURCE TANK EMPTY.

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You may did not open the tank valve before you press fill key! please try as bellow:
Connect tank fill adapter to source tank & open tank valve then make the tank up side down,now press tank fill key. screen will change to checking source tank for 30/60 sec. then start filling.
If you try as above direction & still the problem exist,it may need to replace or rebuild tank fill solenoid.

Posted on Jul 14, 2010

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  • chris21k Sep 29, 2010

    i have the same problem with my robinair ac790pro. i'm not sure where the tank fill adapter to source tank is tho?

  • Hasan Khan Amran
    Hasan Khan Amran Oct 01, 2010

    You may did not open the tank valve before you press fill key! please try as bellow:
    Connect tank fill adapter to source tank

  • stosh1079 Jun 09, 2011

    i have similar problem my screen say source tank empty then we fill the tank to 12lbs then next minute it will say it only has 2 lbs fill source tank

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My 34788 will not transfer from souce tank & will not recover

Posted on Aug 17, 2012

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Posted on Jan 02, 2017

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Robinair 34788 keeps overcharging the isv how do i fix this issue or how do i find out whats wrong


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Jul 16, 2012 | Robinair Cool Tech 34700Z Recovery,...

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I'm Archie i've a Robinair 34988 just five days old and having problem with it. It keeps displaying HIGH PRESSURE (HIGH PRESSURE RESET). whether you try to vacuum,recharge, refill or anything...


This is a common problem of Model: 34788, 34788-I, 34988, AC34788, GE48800 etc.
You need to replace air purge solenoid (Air purge solenoid located on top of the ISV tank, if you open front panel cover then you can see it on top of the tank).
After doing above stapes and your problem still exist then you have to replace PCB relay board. Just claim for warranty (Air purge solenoid and PCB relay board) from where you bought the machine.
Hope this will help to solve your problem, if so please vote for it for farther help! Good luck

May 16, 2011 | Robinair Cool Tech 34700Z Recovery,...

1 Answer

I have a robinair 34788 and when i tunr it on it shows a massage "hi pressure "


This is a common problem of Model: 34788, 34788-I, 34988, AC34788, GE48800 etc.
You need to replace air purge solenoid (Air purge solenoid located on top of the ISV tank, if you open front panel cover then you can see it on top of the tank).
After doing above stapes and your problem still exist then you have to replace PCB relay board.
Hope this will solve your problem, if so please vote for it for farther help! Good luck

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You may overfill the ISV tank. #1 Open front cover & close LIQUID valve on the ISV. #2 Disconnect LIQUID hose from tank,then open tank liquid valve (which you close earlier) to reduce some refrigerant manually from the ISV tank. #3 after reduce refrigerant from tank, re-connect everything & switch on the machine. #4 If you still have the same problem then you have to re-calibrate the scal. I hope this will help you

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1 Answer

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I hope this will help you to solve the problem, if so please vote for it. Gool luck!

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