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  1. #53
    Join Date
    Dec 2006
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    Vancouver, B.C.
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    Quote Originally Posted by BBeerme View Post
    I would just beat on it with a 2 by 4. And if that didn't work, I would get My sledge hammer out and beat it until the fuses blew. Then quote a new compressor.
    LOL, Back in my early days I recall being on the phone with tech support about a scroll compressor that was failing to pump on startup of a new unit. It’s hard to forget a conversation like the one I had with this fellow. After checking everything over he told me to hold on for a bit while he disconnects his voice recorder because he didn’t want to be heard of the procedure he was going to ask me to do. He comes back and says

    “sir, is there a large blunt object near you like a 2x4 or something like that? I want you to take that 2x4 and beat on the top of that compressor with a good amount of force”...

    Well, space was limited so I couldn’t hit it as hard as I wanted to and I wanted to hit it hard at that point! We ended up getting a new compressor to install. I always wondered if I maybe just didn’t beat on it hard enough... maybe it would have worked... or not. At least I had fun


    Sent from my iPhone using Tapatalk
    Quickly, I must hurry, for there go my people and I am their leader!

  2. #54
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
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    Quote Originally Posted by TechmanTerry View Post
    Just one more thing that IDK about. Why is an unloader used on a digital Scroll when the digital part controls/matches the comp load from 100% down to 10%???
    rimide, whatca got for info????

  3. #55
    Join Date
    Nov 2011
    Location
    East Side
    Posts
    7,492
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    I like to reverse the wires, install as high rated capacitor as I have...300-400’s are good...and beat the crap out of them. Then hit the go button! LOL!

    Had a cap blow up once. That was exciting!

  4. #56
    Join Date
    Aug 2006
    Posts
    3,380
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    First Compressor I ever installed, wouldn’t run. Got a Senior tech out there, open windings. He was there for the second compressor. When I pulled it off his truck, it seemed heavier, and it was. Something Was certainly missing, from inside the tin can. Had an Brand new Ice Machine, Compressor Ran, but wasn’t pumping. We bought another Ice Machine. A factory rep. Came out to look at it, they didn’t take the Rubber Plug out of the suction line. Replaced a Roto-Lock Compressor in a Trane, it sounded a little different, but I had to hurry and get off the roof due to a storm. The lights dimmed while I was getting my ticket signed, decided to take a look as the storm was bypassing us. Compressor was locked up solid. Went the next day, we replaced the compressor, another storm blows up. I wedged the compressor in the back of my van, but couldn’t find the Roto-Caps, compressor dumps over. Figured I’d have a huge mess, there wasn’t a drop of oil in the compressor. No it wasn’t in the system, it was shipped dry.
    Retired, after 43 Years

  5. #57
    Join Date
    Mar 2018
    Location
    Kansas Flatlands
    Posts
    438
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    Quote Originally Posted by Poodle Head Mikey View Post
    Now granted; I have not seen Everything - but I have never even heard of a 100uf motor run capacitor.

    I would call Copeland and make very sure that is correct.

    Or post the compressor model number and I'll do it for you - I have their app on my phone.

    PHM
    --------
    So now I gotta get 100uf for the truck? Never seen one. Running backwards or is it 2 compressors with a broken scroll? Do ya got another tech to go confirm your findings?

  6. #58
    Join Date
    Apr 2020
    Location
    Garner NC
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    471
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    I have only heard stories that a scroll compressor running backwards doesn’t pump and makes a lot of noise..I’ve only heard worn scroll compressors make noise like a really bad engine rod knock at high rpm ..they should be reasonably quiet in operation..

    What was wrong with the original compressor? Looking at the pressure readings it looks like the txv could be wide open. I can’t really tell anyway without all the specs especially subcool /superheat /rise/fall

  7. #59
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
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    Quote Originally Posted by Unlimited1 View Post
    I have only heard stories that a scroll compressor running backwards doesn’t pump and makes a lot of noise..I’ve only heard worn scroll compressors make noise like a really bad engine rod knock at high rpm ..they should be reasonably quiet in operation..

    What was wrong with the original compressor? Looking at the pressure readings it looks like the txv could be wide open. I can’t really tell anyway without all the specs especially subcool /superheat /rise/fall
    Can you better define a "worn Scroll comp"? A damaged scroll is one thing. But a scroll gets gets better as it gets "worn in",not like a typical recip comp.

  8. #60
    Join Date
    Mar 2013
    Location
    Treasure coast, FL
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    Quote Originally Posted by TechmanTerry View Post
    Can you better define a "worn Scroll comp"? A damaged scroll is one thing. But a scroll gets gets better as it gets "worn in",not like a typical recip comp.
    How does a scroll compressor get better as it wears? I would think any decrease in friction would go hand in hand with a decrease in pumping capacity.

    Unless you meant "quieter" when you said "better"?

    Sent from my Moto Z (2) using Tapatalk

  9. #61
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
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    The scroll surfaces get "smoother" as the comp runs and gets worn in ,thus increasing the efficiency. At least that is what Copeland teaches in their 3 day COSS Seminar

  10. #62
    Join Date
    Jan 2010
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    Yeppers Terry is correct
    Attached Images Attached Images  

  11. #63
    Join Date
    Mar 2013
    Location
    Treasure coast, FL
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    Quote Originally Posted by TechmanTerry View Post
    The scroll surfaces get "smoother" as the comp runs and gets worn in ,thus increasing the efficiency. At least that is what Copeland teaches in their 3 day COSS Seminar
    Quote Originally Posted by VTP99 View Post
    Yeppers Terry is correct
    Fair enough, but certainly over time the friction that "wears in" the scroll plates will eventually "wear out" and lead to a loss in compression. Don't you think?

    It would be like piston rings in a car, yes they break-in and provide less resistance than when the engine is first fired up while still providing a satisfactory seal been the piston and cylinder wall, but eventually they wear down and the car starts burning oil.



    Sent from my Moto Z (2) using Tapatalk

  12. #64
    Join Date
    Aug 2006
    Posts
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    I have to Vehicles, both with 186K miles on them. The V6 goes through a 1/4 to a 1/2 quart of oil between fully synthetic oil changes at 5,000 mile intervals. The V8 through a 1/2 to a 1-1/2 quart of oil between fully synthetic oil changes at 5,000 mile intervals. The higher the ambient the more oil I go through, mostly it’s out the PVC Valves. So very little wear. I would think it would be even less on a Sealed Compressor system. BTW to prove a point on Single and Two Speed compressor units, I installed a Sight Glass on the Suction line close to the Compressor. It was a real Eye opener to that particular manufacture.
    Retired, after 43 Years

  13. #65
    Join Date
    Jan 2010
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    Quote Originally Posted by shellkamp View Post
    Fair enough, but certainly over time the friction that "wears in" the scroll plates will eventually "wear out" and lead to a loss in compression. Don't you think?

    It would be like piston rings in a car, yes they break-in and provide less resistance than when the engine is first fired up while still providing a satisfactory seal been the piston and cylinder wall, but eventually they wear down and the car starts burning oil.



    Sent from my Moto Z (2) using Tapatalk
    Some interesting reading .....
    Granted it only pertains to the break-in period.
    Attached Images Attached Images

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