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  1. #1
    Join Date
    Dec 2001
    Posts
    31
    i have 2 hosizaki f1000mae machines feeding into a common
    storage bin. customers says over the last month the ice
    production has slowed. use to fill the bin overnight, now
    its only half full.we descaled both machines chemical cleaned the evaporators, they were very dirty. still no
    change in production. I have the specs for the units and
    @ the water temperature entering the units and ambiant
    temperatures etc i should be producing twice the ice that
    i am. suction and head pressures are within 10 percent of
    specs. this rules out a inefficient compressor, so i'm
    confused both machines produce half the ice they should
    but all specs match up? any ideas would be greatly
    appreciated.

  2. #2
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,078
    When the customer says the bin isn't filling up overnight like it always did usually isn't based on any hard facts, just a simple observation that will lead you nowhere.

    You have to weigh the amount of ice produced for a short, but fixed period of time (like 30 minutes) and extrapolate that information into lbs/24 hr. Compare that with what the specs say the machine should be producing at those conditions and you'll have a much better idea of where you really are.

    In your case I would do the production check on each machine separately.

  3. #3
    Join Date
    Dec 2001
    Posts
    31
    we did weigh the ice production and it is half of the
    manufactures specs

  4. #4
    Join Date
    Feb 2004
    Location
    Western New York
    Posts
    1,027

    Just guessing...

    But if both machines have dropped 50% at the same time, I would check water flow to the sumps, and into the evaporators. Good luck!
    Experience is what you have an hour after you need it.

  5. #5
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,543
    The only way to fix them is to recover the refrigerant and scale in the factory gas and weight for the machine, wash condenser with hose and you will havve ice again.

    how old and what gas? That is the best flaker ever made.........great machine if you have the correct type gas and amout in it!

  6. #6
    Join Date
    Dec 2001
    Posts
    31
    THAT WAS OUR LAST RESORT. RECOVERED REFRIGERANT AND VACUUMED
    TO 300 MICRONS RE CHARGED WITH R-22. THE UNIT HAS BEEN
    CLEANED. THATS WHY I CAN'T FIGURE THIS OUT.

  7. #7
    Join Date
    May 2004
    Posts
    11,855

    Joe

    Here is the "out of production" factory PDF service manual for your machine.

    Just click and save or print.

    Hope this helps

    Let me know when you get it so I can remove it from my open server.

    Lusker

    http://home.earthlink.net/~lusk/F-10...ndM_E_serv.pdf

  8. #8
    Join Date
    Dec 2001
    Posts
    31
    THANKS BUT THATS THE SAME MANUAL I HAVE BEEN REFERRING TO.

  9. #9
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,543
    Joe if the pressures are correct and the water temps are within the range in the chart i would look at the water level to make sure you are not running anyhting down the overflow and the water supply is not connected to a water softener. Other than that maybe a compressor and a txv to solve the problem.

  10. #10
    Join Date
    Jan 2002
    Posts
    1,895
    I agree with baub the odds of 2 machines dropping off at the same time are pretty slim unless its a water supply or dirt issue. Are they really clean and is there anything flowing down the drain a leaking flush valve can really hurt production but once again the odds of 2 are pretty small.

  11. #11
    Join Date
    May 2004
    Posts
    11,855

    I think I will let the manual hang for a few days.

    Let others check it out and maybe a combination of minds can get you where you want to be.

    Is it possible that one machine is making more ice than the other? If so, by what percentage?

    A combined failure/slow production of two machines simultaneously has to be outside of the two machines in question.

    Water supply/dirty filters/clogged water inlet screens?
    Low water pressure setting? Has there been any work lately by a plumber in the building?
    Electrical shut down at night? New night manager killing the wrong breaker?
    High ambient temps at night with RTU stat setback?
    Air cooled self contained units with little air flow at night?
    Common bin stat adjustment shutting down early?

    I am sure you have already thought of these things. What is common that we haven’t looked at?





  12. #12
    Join Date
    Feb 2004
    Location
    Maine
    Posts
    483
    Check water supply line. Had this happen once in a small restaurant. Plumber did some replumbing and actually had the hot water line connected to the supply. Call was for low ice production. Also go over things with the owner to find out what is shut down at night. Another restaurant that I service had an ice maker with a bad bin stat. Rather than pay to replace it they killed the power at night, got call that unit wasn't making much ice, replaced bin stat and told them to leave the breaker alone, problem solved.

  13. #13
    Join Date
    Feb 2004
    Location
    Western New York
    Posts
    1,027

    Re-cap...

    A very interesting problem. Joe seems to have taken all the proper steps-

    Cleaned the machines

    Both machines are running with-in 10% of specs.

    Weighed the ice production, and both machines were at 50% capacity continuously (I am kind of assuming the latter).

    Charges pulled, and re-charged.

    Both machines dropped capacity at the same time. (Again assuming from your posts).



    I'm still thinking it is a water supply problem.

    Joe, are the machines air, water or remote?
    Experience is what you have an hour after you need it.

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