Question about Robinair 17800B CoolTech Multi - Recovery, Recycling, Evacuation and R

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Robinair 17800 keypad problems

Just got this machine used. Didn't have a vacuum pump, so I stole the pump from the older machine; same part number. Also purchased the proper tank with red and blue valves.all hoses are connected, unit powers up, fan spins, and when I push Shift and Recycle at the same time, the compressor will run for a moment, then shut down. The display reads "Full" if I push Recover, it will says on the display Automatic and Recover. then it will say CH-P. When I push Enter, nothing happens, when I push Charge, nothing happens, when I push Vacuum, nothing happens. all the numbers work, but that's it. Also, I cannot find the receptacle for the vacuum pump. Any help would be appreciated.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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mhkamran
  • 180 Answers

SOURCE: Robinair 34788 not pulling a vacuum

It's seems to be problem with your unit relay board,vacuum pump or pressure transducer.Most of Robin air 34788 machine having same problem.You can try as follows 1# Open vacuum pump oil filling cap to release extra pressure from pump.2# Replace new relay board & follow the on screen message(do not skip any option).3# Check pressure transducer is working properly.I hope this will help you.

Posted on Jun 07, 2009

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mhkamran
  • 180 Answers

SOURCE: I have a Robinair 34134Z It will not recover freon

Please check the following: 1# Check the recovered amount of refrigerant since the last filter change(Max.filter cap.150 LBS/68 KG).If more then this you must change spin-on filter & vacuum pump oil.2# Check with vacuum gauge on compressor test(During compressor running) port & make sure it has 13"HG of suction,If suction less then 13''HG then you have to replace the compressor.3# Check all tank hose (Vaipor,Air purge & Liquid) is connected on the ISV tank quick seal.(Do not over tight).Hope this will solve your problem.

Posted on Dec 29, 2009

mhkamran
  • 180 Answers

SOURCE: i have a robinair 15100 vacuum pump... oil is

I seems to be problem with pump capacitor.change capacitor & i hope it will work fine.

Posted on May 23, 2010

mhkamran
  • 180 Answers

SOURCE: ROBINAIR 347002K WON'T INJECT OIL

I think you'v try to inject the oil from ''WRONG'' side,as you say RECOVER/VACUUM which is LOW side manifold valve. You should inject the oil from HIGH side ( Turn the high side valve to CHARGE/OIL INJECT after vacuuming & low side vulv to CLOSE possition ) with pressing F1 key. once you press it then hold the key as long as you wish to inject the oil. If you try this way & you still have problem with oil injection then you may need to check oil injection CHECK VALVE or oil injection SOLENOID ( Both located under Hidg side panel mountin valve). NOTE: UV Dye is not a problem for oil injection! I hope this will help you to solve the problem,Good luck. Don't forge to vote for my solution!

Posted on Jul 10, 2010

mhkamran
  • 180 Answers

SOURCE: Hi, My robinair model 34700Z

It is clear to me you need to Replace the Compressor! But if you want to make sure yourself, please do the following: Press recover & fix a vacuum gauge on your machin Compressor suction port & monito the gauge is going up to13"HG suction,if not then you need to replace the compressor.
I wish this will help you to solve the the problem. if so, pls vote for it. Good luck!

Posted on Aug 11, 2010

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1 Answer

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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.
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For change vacuum pump oil follow the bellow step: Press main menu then keep pressing up or down arrow key till display show "CHANGE VACUUM OIL" then press "YES" key. Now vacuum pump will run for two minute & stop automatically. When pump stop you just open the oil drain cap and drain all used oil from pump (oil drain cap located outside of the machine near high & low side hose). After draining all used oil replace oil drain cap and fill 5 ounce new ROBINAIR vacuum pump oil then press "YES" key and keep filling oil up to middle of sight glass of vacuum pump. Press "STOP" key to complete the process.

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You have run the machine 10+ hours for vacuum since last oil change. so you have to change vacuum pump oil. For change vacuum pump oil just follow the bellow step: Press main menu then keep pressing up or down arrow key till display show "CHANGE VACUUM OIL'' then press "YES" key. Now vacuum pmp will run for two minute & stop automaticly. When pump stop you just open the oil drain plug & oil fill cap of vacuum pump ( Located oute side of the machine near high & low side hose ) & drain all oil from vacuum pump. After draining used oil,replace oil drain plug & fill new ROBINAIR vacuum pump oil till middel of sight glass.Press "YES" key & follow on screen messeage. NOTE: Do not over fill the pump & Do not use any COMPRESSOR oil on the vacuum pump!
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It's seems to be problem with your unit relay board,vacuum pump or pressure transducer.Most of Robinair 34788 machine having same problem.You can try the following 1# Open vacuum pump oil filling cap to release extra pressure from pump.2# Replace new relay board & follow the on screen message(do not skip any option).3# Check pressure transducer is working properly.I hope this will help you.

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Robinair 34788 not pulling a vacuum


It's seems to be problem with your unit relay board,vacuum pump or pressure transducer.Most of Robin air 34788 machine having same problem.You can try as follows 1# Open vacuum pump oil filling cap to release extra pressure from pump.2# Replace new relay board & follow the on screen message(do not skip any option).3# Check pressure transducer is working properly.I hope this will help you.

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