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

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Have 34700z refrigerant pressure into oil injection bottle why?

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This is a normal function of the machin,so don't worry!

Posted on May 08, 2010

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Posted on Jan 02, 2017

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Robinair Cool-Tech 34700z sending refrigerant to oil recovery container when charging system.


You confirm it by how it functions, if it sticks in a mechanical way there is no electrical testing that would be valid. I would just replace both solenoids.

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You need to Rebuild/Replace oil injector solenoid, Located on "Inlet manifold block". Check attach picture to find location of oil injection solenoid. Hope this will help you. Thanks 38033401-113d-4966-a736-c10226c2d91b.jpg

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MY 34700Z ON RECOVER SAYS LOW PRESSURE, IT EVACUATES OK BUT SHOOTS OIL INTO OIL BOTTLE UNDER PRESSURE @ SAME TIME


your recycle solenoid is stuck open. the oil drain switch works by building pressure up to 16 psi then the recycel solenoid shuts off and the oil drain solenoid opens. if the recycle solenoid is stuck open you will get liquid 134 out when it is draining

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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.

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1 Answer

When under vacuum down machine started pulling oil front injection bottle


You need to Change ''Oil inject" solenoin from small manifold assy.
Note:Green dot OR blue label denotes are oil injectoct solenoid.

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1 Answer

ROBINAIR 34700Z ALWAYS FAILS VACUUM CHECK AND WON'T INJECT OIL.SAYS PRESSURES EQUAL.


Please check the following: Low side manifold gauge is going to -13"HG while you recover refrigerant from the vehicle.If low side gauge not rich to that lavel then vacuum sensor will detect pressuer &
it will stop you to make vacuum until you fix the problem.If it happen you may nee to rebuild/replace one or more of this solenoid.1#Vacuum solenoid 2# Recover solenoid.3# Recycle solenoid.Also check Low/High side small solenoids ( In the small block assy.)
If all of this solenoids working properly then check Vacuum pump capacitor & vacuum sensor.Hope this will help you to solve your problem.

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1 Answer

Refigerant in oil recovery bottle


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

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1 Answer

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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