The thank leak now i solve it but now gas can not fill all the time showing thank emty

The Robinair Cool Tech 34700Z refrigerant recovery/recycle machine is designed to recover and recycle refrigerant from air conditioning and refrigeration systems. If the machine is losing refrigerant during the vacuum cycle, it could be caused by a few different issues. Here are a few possibilities:

1. Leaks in the hoses or fittings: The hoses and fittings on the machine may be leaking refrigerant, causing it to lose pressure during the vacuum cycle. Check for any visible leaks and replace or repair any damaged or worn hoses or fittings.
2. Leaks in the machine: The machine itself may be leaking refrigerant. Check for any visible leaks and replace or repair any damaged or worn parts.
3. Incorrectly set vacuum pressure: The vacuum pressure may be set too high, causing the machine to lose refrigerant during the vacuum cycle. Consult the manual and make sure the pressure is set correctly.
4. Clogged filters: The filters in the machine may be clogged, preventing it from holding a vacuum and causing it to lose refrigerant during the vacuum cycle. Clean or replace the filters.
5. Incorrect vacuum pump oil level: The vacuum pump oil level may be too low, preventing the pump from creating a strong enough vacuum to hold refrigerant. Check and add vacuum pump oil as needed.

It's best to consult the manual or a professional technician for help. They will be able to diagnose the problem and recommend the appropriate course of action. It's important to note that not addressing this issue can cause further damage to the machine, so it's best to have it repaired as soon as possible.

Open oil drain solenoid and clean solenoid plunger with dry soft clots and replace it. After that check the apply vacuum, if you still have same issue then you may need to replace oil drain solenoid.
Hope this will help to solve your problems.
Thank.

No, you cant remove tank fill solenoid until close low (Blue) and high (Red) side valve on ISV tank (Internal storage vessel). see attached picture to identify Tank fill solenoid.

1 Printer off then removing tonner and shake 5 times after insert tonner then switch on printer
2 tonner powder emty then refilling tonner

Please check Charging solenoid (S3) in Solenoid manifold block, it may need to change solenoid coil or Rebuild. If charging solenoid is OK, then problem can be SCALE or MAIN CIRCUIT BOARD. See if the machine display show default charging weight 90 kg/lbs when you active CHARGE mode. If not then calibrate scale. But if default charging weight is shown then replace MAIN CIRCUIT BOARD. See attached picture to find solenoids. I wish this will help you to solve the problem. If so please vote for it for further assistance. Best of luck!

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.

NOTE: Do not over fill the pump & do not use any COMPRESSOR oil on the vacuum pump!
Hope this will help you & if it is please vote for my support.
Hope this will help you. If so please vote for it. Good luck

Please check ''TANK FILL'' hose quick connector & ''LIQUID'' hose on ISV Tank & make sure both valves is opening properly.it sound like(one of those) close! If valves is Ok then check tank fill solenoid, it may need to rebuild or replace. If those are OK, replace ''TANK FILL'' Hose.
I hope this will help you to solve the problem, if so please vote for it. Gool luck!

Fix low side coupler to R134a refrigerant sorce (new refrigerant tank with up side down & tank valve open) tank.Open low side manifold valve & close high side manifold valve.press tank re-fill or recover botton & fill as you want.NOTE: Max.cap.50 LBS or 23 KG.

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.

Check your Vent. It's clogged or is too long...or restricted somewhere. Vents are critical...