20 Most Recent Robinair Cool Tech 34700Z Recovery, Recycling, Recharging - Page 2 Questions & Answers

This is a common problem of Robinair 34700Z / 347002K & 347112K series machine. So don't worry just do the following, with POWER SWITCH OFF: - 1# Open front panel cover and verify the ISV tank is not overfilled. If full, carefully remove refrigerant manually from ISV tank by pressing tank valve. 2# verify if there is high pressure in the ISV tank. Purge excess air from the tank manually. (Open air purge hose from the ISV tank, then carefully press tank valve as needed to blow out excess pressure from the ISV tank)

After doing all above stapes and your problem still exist then replace air purge solenoid (Air purge solenoid located near the ISV tank and fixed with automatic air purge device). Hope this will solve your problem, if so please vote for it for farther help! Good luck

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

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Try running the compressor for a while,then see if you can get more into the system on the low side,not the high side while it is running,until the sight glass on receiver dryer clears from being milky.

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

It is simple as you do the same on your mobile phone to text a message

You may need to replace compressor. Open compressor test port (located on one of the pipe line which come to compressor from top of spin-on filter) and fixe a vacuum gauge on it. press recover from menu and check compressor suction for 13''Hg. If compressor has no suction then its need replace. NOTE : if you do not have a vacuum gauge then after opening cap from test port, press recover from menu and then gently press small valve on test port with a small L-key to feel suction of compressor. if the compressor discharging air instead of suction, replace compressor.

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. Thanks and I hope this will help you to solve your problems.

If you have model : 34788 or 34788-I please see the attached picture to identify tank fill solenoid.

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.