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  1. #1
    Join Date
    Nov 2010
    Location
    MN
    Posts
    144

    Scotsman little cubes

    Working on a Scotsman SCE-275. Was making small cubes. Leveled unit, turned off it's twin next to it that was dumping in 115F air into the condenser, plugged in disconnected sensors to control. Error codes are now gone and sucking in 88F air, filter and condenser clean as a whistle. Still making small cubes. Checked float and appears to be working, hot gas isn't leaking, neither is water valve. High side at times was hitting 400psi and suction pressures higher than specs throughout cycle. Seems as though it's working properly through the cycles. Can't figure this damm thing out. Evap freezes pretty uniformly but has some major flaking. Any suggestion would be greatly. I haven't worked on many ice machines. Thanks

  2. #2
    Join Date
    Jul 2012
    Location
    Richland, WA
    Posts
    248
    To me it sounds like with my experience in working on CME1056 and CME865 that 400psi high side is very high. I had to put my gauges on one 1056 when I was doing PM on it and this high side was about 280 max. I would say pull the charge and vacuum it down and then weight in the correct charge.

    Quote Originally Posted by PMARS2345 View Post
    Working on a Scotsman SCE-275. Was making small cubes. Leveled unit, turned off it's twin next to it that was dumping in 115F air into the condenser, plugged in disconnected sensors to control. Error codes are now gone and sucking in 88F air, filter and condenser clean as a whistle. Still making small cubes. Checked float and appears to be working, hot gas isn't leaking, neither is water valve. High side at times was hitting 400psi and suction pressures higher than specs throughout cycle. Seems as though it's working properly through the cycles. Can't figure this damm thing out. Evap freezes pretty uniformly but has some major flaking. Any suggestion would be greatly. I haven't worked on many ice machines. Thanks

  3. #3
    Join Date
    Nov 2010
    Location
    MN
    Posts
    144
    Thanks, I was thinking so. I do notice a after market filter drier on it. I guess I should of checked amp draw. Do flaky evaps change pressures at all or do cubes just tend to stick?

  4. #4
    Join Date
    Jul 2012
    Location
    Richland, WA
    Posts
    248
    I know one machine I hooked up to, had flaky evaps and was not able to keep up with the store taking ice out for use. My owner has decided to just replace the unit with a new one.

    Quote Originally Posted by PMARS2345 View Post
    Thanks, I was thinking so. I do notice a after market filter drier on it. I guess I should of checked amp draw. Do flaky evaps change pressures at all or do cubes just tend to stick?

  5. #5
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,384
    Small cubes are almost always due to a water leak causing the float to trigger too early. Check that no water is splashing into the bin during the cycle.

    Also if it has a replacement board make sure it is set to the right setting for that machine. The SCE Should add water once during a freeze cycle

  6. #6
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Check defrost time. If evap is flaking it may not release the ice properly and you ice is being melted away before release. Regardless if the evap is flaking that's the #1 issue. Those flakes are going out with the ice and being consumed by customers. Good luck

  7. #7
    Join Date
    Oct 2009
    Location
    Raleigh, NC
    Posts
    794
    I have hardly ever seen a pillow-cube Scotsman that DIDN'T have flaking evap plates...Well, except brand new.

  8. #8
    Join Date
    Jul 2012
    Location
    Richland, WA
    Posts
    248
    I have notice that most of our Scotsman's ice machine's have flaking evap plates. I think that I like the Manitowoc setup the best.

    Quote Originally Posted by MicahWes View Post
    I have hardly ever seen a pillow-cube Scotsman that DIDN'T have flaking evap plates...Well, except brand new.


    Sent from my iPhone using Tapatalk

  9. #9
    Join Date
    Dec 2010
    Location
    Woodbridge Twp, NJ
    Posts
    1,307
    What ive seen happen is if the flaking is bad enough, it will hold on to the cube during harvest and melt it for a bit until it releases a small cube. You have to watch it during harvest.
    Every customer you take for granted today will be someone else's tomorrow.

  10. #10
    Join Date
    Nov 2010
    Location
    MN
    Posts
    144
    No cube holding here. I think I'll pull and reweigh charge in, to get baseline readings. I'm guessing an overcharged system won't have low enough suction that is needed for proper cube making. With 95 ambient would I expect to see pressures reaching 300?

  11. #11
    Join Date
    Oct 2009
    Location
    Raleigh, NC
    Posts
    794
    How long is the freeze cycle? The float is the only thing that controls cube size. The machine will run until the float says enough water is missing, or until the max freeze timer expires. I think that is one hour. I think normal cycle times for that machine should be about 25 minutes.

  12. #12
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,384
    Quote Originally Posted by MicahWes View Post
    The float is the only thing that controls cube size. The machine will run until the float says enough water is missing, or until the max freeze timer expires.
    correct! a refrigeration issue will not affect cube size, just production speed.

    As i mentioned in my previous post, have you checked the board to see if its been replaced with the universal model? I mentioned that the sump should fill once per freeze cycle, what I meant is that it should REFILL once per cycle. The water should fill and a cycle should start. The first time the float triggers, the water should refill. If the board switch is set to the wrong setting, such as a CME 256, the first float signal will trigger a harvest instead of a refill.

  13. #13
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    5,535
    Quote Originally Posted by PMARS2345 View Post
    Any suggestion would be greatly. I haven't worked on many ice machines. Thanks
    Go to the Scotsman web site and down load the manual for that machine.

    Read before jumping.

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