trying to under stand pressure reading on older mini split

trying to under stand pressure reading on older mini split

trying to under stand pressure reading on older mini split

by Rowleys Kitchen Improvements
trying to under stand pressure reading on older mini split





  • trying to under stand pressure reading on older mini split a/c unit


    after vacuuming down this mitsubishi mini split started adding R22 very slowly got pressure up to about 60 psi, went in to check indoor unit not blowing

    cool air when i went back outside fan was on , it shut off few seconds later comp.shut off and noticed pressure raised to about 90 psi then compressor kicked on and pressure went back down to 60 psi did not to want to add any more r 22 until i could understand why this would happen, any ideas ?






  • Unfortunately, since your listed as a homeowner, we cannot give DIY assistance per the rules here.
    What does your service tech have to say?

    “I haven’t failed. I’ve just found 10,000 ways that won’t work.” – Thomas Edison

    “It’s not whether you get knocked down, it’s whether you get up.” – Vince Lombardi

    “In this house we obey the laws of thermodynamics” – Homer Simpson

    Local 486 Instructor & Service Technician







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  • As mentioned, DIY advice is not allowed as per site rules. Thread will remain open in case you have non-DIY questions.






  • Yes, call for professional service. Site rules prohibit giving advice for DIY.
    You’re probably violating numerous regulations by adding R-22 without being certified.

    *********
    https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.

    Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/


    Site member map HERE!






  • MrHalibut

    If you are, indeed a homeowner, we cannot help you. This is not a DIY site.

    If you’re a tech, please get your post count up to 15 and apply for Pro Membership if you have the listed qualifications. That will open up a huge knowledge base to you and our members will be glad to assist.

    https://hvac-talk.com/vbb/threads/11…nal-Membership






  • For the most part, ductless units DON’T go by pressures, but amoint/weight.

    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.

    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to “Please Do Not Feed the Animals”. Their stated reason for this policy “… the animals become dependent on handouts and will not learn to take care of themselves.”

    from an excerpt by Paul Jacob in Sun City, AZ






  • It must be a very old unit if it uses R-22.

    *********
    https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.

    Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/


    Site member map HERE!