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Post by stuff on Jun 24, 2024 20:28:42 GMT
2008T Machine was pulled and worked on for an Annual pm.
We can no longer get the conductivity above 13.0 on both the pre and post condo cells
1. Deair pressure -22 to -24 (it pulses)
2. Loading pressure 25 at peak
3. Flow pressure 35
4. Water inlet at 19
5. No flow errors
6. Every board in card cage came from a working machine (EXCEPT UI mics board)
7. New heat exchanger
8 New Transducer #9
9. Acid pump calibration works fine. We even tried to fudge this to make the condo higher and it does not go above 13.0 still
10. Two new acid pumps, acid by itself will only get to 10.5 condo
11. calibrations on heat and condo galore
Next is a new balance chamber, but the one in it now is newish and nothing fluctuates, just the next spitball to throw at it.
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Post by dave74 on Jun 24, 2024 22:10:07 GMT
Was everything working OK until the PM? I am trying to think of what might possibly go wrong during a PM that would cause this problem. If the conductivity is borderline, fudging the acid pump calibration will usually bring it to the TCD.
I am trying to think of something that might have been plumbed incorrectly, but I can't think of anything. Could there be a restriction on the output side of a concentrate pump?
What about the bicarb pump? Could there be a problem with it?
I think I would try the balance chamber leak test.
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BMF
Junior Member
Posts: 95
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Post by BMF on Jun 25, 2024 12:29:52 GMT
Sounds like a torn BC membrane. Have you confirmed with an independent meter that the conductivity is in fact only 13.0? Is this a Bibag machine?
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Post by stuff on Jun 25, 2024 14:12:06 GMT
Was everything working OK until the PM? Yes it was, working perfectlyCould there be a restriction on the output side of a concentrate pump? The pump calibration worked perfectly. No stutters or delays. End result was where i would expect it
What about the bicarb pump? Could there be a problem with it? We did not even look at this since the acid pump alone wont go up to proper conductivity(11.2 - 11.4 ish)I think I would try the balance chamber leak test. We ran a valve leak test and everything passedOur 90xL displayed the exact same conductivity as the machine. There were no weird fluctuations in temp or condo. We are in the process of replacing the entire balance chamber. Will update when that is done |
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BMF
Junior Member
Posts: 95
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Post by BMF on Jun 25, 2024 14:47:56 GMT
The valve leak test will not locate a torn membrane. The BC leak test will. I hope the when you change your BC, the conductivity returns to normal.
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Post by dave74 on Jun 25, 2024 14:52:39 GMT
I meant the membrane leak test.
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Post by stuff on Jun 25, 2024 15:23:49 GMT
Replaced just the balance chamber membranes. One of them was off center in the chamber. Could tell from the imprint on the rubber was not centered. This ended up solving the issue.
No clue why this was not an issue BEFORE the pm though
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Post by dave74 on Jun 25, 2024 17:22:40 GMT
Thanks for posting your fix.
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Post by Phillip-Ashley Ludlow on Jun 26, 2024 15:32:21 GMT
Replaced just the balance chamber membranes. One of them was off center in the chamber. Could tell from the imprint on the rubber was not centered. This ended up solving the issue. No clue why this was not an issue BEFORE the pm though jm2c, i find the bc membranes go at ab'ut the 20k mark. iv prob swapped all of them at my clinic at this point  |
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Post by stuff on Jun 26, 2024 17:32:29 GMT
Replaced just the balance chamber membranes. One of them was off center in the chamber. Could tell from the imprint on the rubber was not centered. This ended up solving the issue. No clue why this was not an issue BEFORE the pm though jm2c, i find the bc membranes go at ab'ut the 20k mark. iv prob swapped all of them at my clinic at this point The balance chamber was replaced with new almost a year ago, the reason why we did not go straight to it. (Something about assumptions goes here) |
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Post by Phillip-Ashley Ludlow on Jun 26, 2024 17:34:54 GMT
jm2c, i find the bc membranes go at ab'ut the 20k mark. iv prob swapped all of them at my clinic at this point The balance chamber was replaced with new almost a year ago, the reason why we did not go straight to it. (Something about assumptions goes here) Attachments:
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