34700z will operate properly till it starts charging and it shoots freon into the oil recovery tank when charging. any help would be appiciated

The machine requires a min amout of 6lbs to even charge. but if you are showing any amout charging it is not the machine its self. you are looking at may be bad hoses or couplers. it is common in the winter months to have charge issues if the unit is not above 70 degrees F. dont forget there are cars/trucks out there that no matter how hard you try you can not complete a charge on the high side and you must switch over to a low side charge

Filter must be change every 150LBS of recoverd refrigerant !!!

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

1# CHECK CHARGE SOLENOID, IT MAY NEED TO REPLACE.
2# OPEN FRONT DOWN COVER AND CHECK "LIQUID" HOSE QUICK CONNECTOR ON ISV TANK

IT'S SOUND LIKE NEED TO REPLACE OIL DRAIN SOLENOID OR OIL DRAIN SWITCH ( SENSOR). IF BOTH ARE REPLACED

Your machine sound like normal to me! For charging to the vehical you should have minimum 3.30 lbs of refrigerant on ISV tank. However if you wish to re-calibrate the scal,please check with my other solution where i post detail information about scale calibration.
I wish this will help you to solve the problem.

You can do the following :
1# Rebuild/Replace ''charge'' solenoid.
2# Check ''recover'' solenoid is working properly. Repair as need. If recover solenoid is OK, Then you may have to replace the "Compressor".
I hope this will help you to rectify the problem. If so, please vote for solution. Best of Luck!

Check ISV tank liquid & vaipor hose.make sure it is not too much tight or lose. also check recovery,recycle & oil return solenoid are opening properly.

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

Please Check the following with min.2.5KG of refrigerant in ISV tank:1#Check high side small recover solenoid (in small manifole assy.) it's may neet to rebuild.2# Check main charging (in main manifold assy.)solenoid,rebuild if need.3# Check ISV tank liquid hose is connected properly & make sure it's not too much tight OR loss.3# Check high side coupler is opening properly.Hope this will help you to solve the problem.