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Post by BIOMED304 on Jun 14, 2022 12:31:42 GMT
Machine is failing TMP, Optical Detect, Neg Pressure. Have replaced deaeration motor, all boards, pump head, deaeration valve, have good pressures throughout machine. Cannot figure this one out. Takes a long time to get the neg TMP at beginning of tests. I am stumped.
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Post by dave74 on Jun 14, 2022 12:56:15 GMT
I actually think the manual is pretty good on this one. Since you say it takes a long time to get TMP, the manual suggests checking the UF pump to see if the pulses are strong. The UF pump causes the TMP to increase. If the UF pump is OK, the manual describes how to best check for a leak. Those are the first two things I would check.
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Post by BIOMED 304 on Jun 14, 2022 12:58:38 GMT
Dude i have went through the whole manual no fix. UF pump is calibrating fine. I have no leaks anywhere. I dont understand. I have also put a new air seperator on and Transducer #9 several valves, ect
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Post by BIOMED304 on Jun 14, 2022 13:05:34 GMT
Also this machine sometimes leaks out of the vent tube during a rinse. It also has a new float switch and heat exchanger. I have replaced so much on this machine.
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bess
Junior Member
Posts: 59
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Post by bess on Jun 14, 2022 13:17:09 GMT
Will it pass the self-test with the shunt door open? If so start looking at V24, V25, V26, bulk head fittings at the back of the hydraulics, dialysate lines, and o-rings inside the Hansen connectors.
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Post by BIOMED 304 on Jun 14, 2022 13:44:33 GMT
No it will not pass with shunt door open
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pacnw
Full Member
Posts: 187
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Post by pacnw on Jun 14, 2022 14:50:59 GMT
when it comes up to conductivity is condo stable? If so what is the TMP reading? is it high(negative) or low(positive)? Have you tried a new Diasafe Filter?
. Check TMP
High TMP=top of the screen(negative) = stuck open BC valve on spent side
Low TMP = Bottom of screen or Positive= stuck open BC Valve on fresh side
If you suspect a leaking BC Valve then run the leak test. Rinse machine before running test
Spent side checks
1. Put dialysate connectors into a bucket of water.
2. Plug flow pump into deaer spot
3. Plug valve 36 into Valve 33 check flow rate at end of drain hose
4. Plug valve 38 into valve 33 check flow rate at the drain
5. Should be equal amounts over the same time of capture.
Whats left to check is Diasafe and CFS switch
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Post by gnurk on Jun 14, 2022 17:39:46 GMT
also check the calibration of your arterial display and your venous display the valve leak test only will fail if valve is sticking open it will pass if the valve is stuck closed
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Post by Guest123 on Jun 14, 2022 17:47:04 GMT
I understand the UF pump calibration is good, which is not an indicator of it having a microleak of some kind. Even if it passes the "spit" test, it may still be bad. Trust me, I came across this last year. I had to get a new UF pump and it solved the TMP/Neg press test failures.
Swap the UF pump with a known good one if you haven't done it; just give it a go. Check your loading pressure and flow relief valve body for leaks as well.
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Post by Mnbiomed on Jun 17, 2022 13:17:25 GMT
We just had one with the same symptoms and it was Dialysate Pressure Transducer #9.
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Post by lakayjokjok on Jun 23, 2022 19:12:26 GMT
try to replaced balancing chamber membrane.
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Post by BIOMED 304 on Jun 28, 2022 15:59:12 GMT
Still haven't figured this one out. This machine takes a super long time to get Neg TMP at beginning of tests. I am stumped on this one.
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eric
Full Member
Posts: 114
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Post by eric on Jun 28, 2022 16:10:18 GMT
could the uf pump diaphragm be leaking? did you check your bc valves? tried induced positive pressure test to see if you can find a leak?
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Post by MicroTone on Jun 30, 2022 14:24:41 GMT
Is the new transducer #9 a different Rev. than the one you had in there before? If I remember right Rev.A are pretty unreliable.
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Post by Machine Man on Aug 25, 2022 17:45:13 GMT
possible to have two separate issues? or your condo is fluxing? optical detector can fail if your transducers left on arterial/venous pressure ports. Try a different module or recalibrate your pressures (venous/arterial). optical detectors do go bad from time to time. Thats only addressing the optical detector failure.
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