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430L3U Circulation error


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We're getting error 121 (Circulation) on our 430L3U.  After checking both circulation pumps and the flow meter, I noticed that none of the tanks appear to be circulating.  Since I think simultaneous failure of eight pumps is unlikely, does anyone have suggestions about where to start?

Ted Dickens

O.C. Photoworx

Oxford, Michigan

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Sorry 'bout that, glitch with my pdf utility and  didn't quite format the merge correctly? lost some content of the diagrams, full page is not displayed. Must be some quirk with this old Kodak manual.

Here are the single five pages.

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