High presure rest on robinair 34788

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The Robinair 34788 is an automotive air conditioning service machine that features a large, easy-to-read display. If the display on your 34788 machine appears dim or the contrast is not suitable, it is possible to adjust the display contrast to improve visibility. Here are the steps to adjust the contrast on the Robinair 34788:

1. Turn on the machine and wait for the display to fully light up.
2. Press and hold the "Enter" and "Clear" buttons simultaneously for three seconds.
3. The display will show "Contrast" and the current contrast setting.
4. Use the "+" and "-" buttons to adjust the contrast to your desired level.
5. Once you have set the contrast level, press the "Enter" button to save the setting.
6. The display will show "Contrast Saved" to confirm that the new setting has been saved.

If you are still experiencing difficulty with the display after adjusting the contrast, there may be an issue with the machine's internal components or the display itself. In this case, it is recommended that you contact a qualified service technician for assistance.

Question edited for full 'make model (what it is)'.
Question moved to a Robinair category.

Contact their Technical Support Line

Contact Us - Robinair

https://www.robinair.com > contact-us
Customer Service Phone: 800-533-6127. Fax: 800-283-8665. Email: [email protected] ; Technical Support Phone: 800-533-6127. Fax: 866-259-1241. Email: ...

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Seems to blockage in the inlet or pressure switch

Does it flash any codes on the screen when you attempt to recover? You'll want to check the inline filter as well as the condition of the pump oil.

did you forget to plug it in ???

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.

sounds like you need to check the grommet between the motor and the pump. If this grommet connector breaks, the motor will come on but the pump will not work. Turn the unit upside down and look where the motor connects to the pump. Be aware if you can lose your oil while turning upside down unless you cap the port and exhaust. If this is it, go straight to the Robinair web site and you can order one for around $25.

I think your machine is working normal! Robiaair 34788 is high bred technology machine, you can't forse on it to fast recover! It will compleate the process it self. However if you still think this is not working normal you can check low/high side hose & coupler for any block.
Hope this will be helpfull to you. Good luck

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.