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Post by POTTSBMT on Mar 31, 2023 19:49:32 GMT
I have a 2008t with around 35,000 hours that was giving flow error, high flow/low flow, high cond, high temp on the floor. It gets brought back to me, I rinse and get flow inlet error pretty soon into the rinse. I go to check dear, loading and flow calibrations and I cant get a reading at all. Dear motor turns but both gauges read 0. Theres little to no sound. Check flow motor and I get 35. I have checked brushes, changed gear head, put a known good pump with new gear head in, nothing has changed it. Now when I rinse, theres a ton of air bubbles in acid and bicarb lines, the dearation motor is filled with air in the tubing, and the rinse gets stuck at 14:51 with Flow inlet error. Any suggestions?
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Post by Guest on Apr 1, 2023 3:29:53 GMT
Check the inlet regulator, float switch, V41. check to make sure there is inlet pressure.
then check the float switch to see if it is working, when in rinse open the hydrochamber to empty it (water should be pouring out in rinse) if it water doesn;t continually pour out, it's the float switch. You can also check the float, by plugging in the new one and manually actuate it to verify. If you don't have a spare, jump pins 1 & 3 on the float switch dist board to simulate a proper working float switch. When jumped water should be pouring out in rinse.
If all of that checks out, check v41.
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Post by POTTSBMT on Apr 3, 2023 19:51:30 GMT
still having issues, theres no flow happening what so ever now. Bobs not bobbing, nothing coming out of the drain. really lost here
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Post by Unknown24 on Apr 4, 2023 16:59:29 GMT
Having the same problem, any luck?
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Post by Guest on Apr 4, 2023 18:01:52 GMT
What were the results of the checks above? Your D motor could be air-locked, v30 could be stuck, could be electronics, could be obstructions... The more information you provide will be very helpful for us in assisting you.
perform a back to back, check to see if it's electronics or hydraulics.
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Post by POTTSBMT on Apr 4, 2023 18:26:57 GMT
Ive replaced hyrdochamber, Dear motor and gearhead, v41, v30 (all with known good). Verified inlet water pressure (19. Ive replaced actuator test board and function board with known good. Dear and flow shafts are both rotating (correct direction) while rinses, when in rinse nothing comes out of the drain tubing.
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Post by pecodee on Apr 4, 2023 18:43:51 GMT
with that many hours valves, valves, & valves most likely. Replace all BC valves & membranes while you have it apart time too anyway. and 24, 25, 26, 30, 39. You can check them all by taken them apart. Hopefully someone in your team can show how that is done.
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Post by dave74 on Apr 4, 2023 21:10:25 GMT
I don't think you said if your machine has bibag.
If you look at the troublehooting guide, there isn't that much to check if the loading pressure is 0. Your problem must be on the primary side. If you had a bad balance chamber valve, or any problem on the secondary side, you wouldn't see a loading pressure of 0.
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Post by dave74 on Apr 5, 2023 13:55:24 GMT
Does you deaeration pump seem to have as much power in this machine as it does in other machines? There are procedures in the troubleshooting guide for checking the actual voltage going to the deaeration pump, for checking the flow restrictor for an obstruction, checking valve 65 and checking for an air lock. You have replaced almost everything else.
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Post by POTTSBMT on Apr 5, 2023 15:26:26 GMT
So I found the issue. All along I felt like it was a deaeration issue. I had changed the pump (I take them out and change brushes and recycle the pumps that way) and put in a new gearhead. But something kept telling me that the issue was still with the pump so I put a brand new pump in and it worked perfectly fine. Opened the old pump and noticed that the spring had caught on the side of the plastic bracket so it never pushed the brush the whole way down. Thanks for all the replied everyone!
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Post by dave74 on Apr 5, 2023 17:19:31 GMT
Thanks for posting your fix.
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Post by leif on Oct 27, 2023 18:22:04 GMT
flow inlet error caused by drop in feed pressure. opened v43 and the seals were cracked and split, and the spring clip is getting hung up when activated. drain in dialysis is only dumping the dialysate its pulling from the jugs. no water mixed. loading pressure regulator reads 20 without a dip during dialysis mode. Anything else im possibly missing before I order parts?
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Post by dave74 on Oct 27, 2023 20:10:50 GMT
A drop in feed pressure could cause a No Water alarm because the float isn't rising. This is the opposite of what you are seeing. The float isn't going down on your machine.
I copied a quick flow error troubleshooting guide from the tips and tricks section of the Fresenius forum.
Troubleshooting Flow Errors
1. CHECK Loading pressure. Good pressure means the error is on the secondary side, Bad pressure it’s on the primary side. Always start with this. Read your pressures while the error is present. If intermittent wait for the issue to show then read the pressure.
2. Check valve 101 if Bibag
3. Unplug #6 and put a temperature resistor into the place so you are checking valves 43 and 30. Flow to drain if good. No flow valve 30 or 43 are bad
4. Open shunt door to check valve 24 and 25. If the error goes away it’s valve 26, if it stays you have cleared all three valves.
5. check drain flow
6 check conductivity= if condo high= stuck closed BC valve
Stuck closed BC Valve troubleshooting from Select Program Screen
Plug valve 35 into V30’s spot and check flow at red Hansen hose. If no flow loosen BC valve 31 from the B/C. If you have dialysate coming out of the valve, 31 is the bad valve. No flow it’s valve 35
Plug Valve 37 into V30’s spot and check flow at the red Hansen. If no flow loosen BC valve 33. If you have dialysate coming out of the valve, 33 is the bad valve. No flow it’s valve 37.
Flow should be the same or 800 ml a minute
7. Check TMP troubleshooting from Select Program Screen
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. No flow… loosen valve 32 from the top of the balance chamber. No flow shows valve 36 is bad. Flow shows valve 32 is bad.
4. Plug valve 38 into valve 33 check flow rate at the drain No flow… loosen valve 34 from the top of the balance chamber. No flow shows valve 38 is bad. Flow shows valve 34 is bad.
5. Should be equal amounts
Whats left to check is Diasafe and CFS switch
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Post by Mph92563 on Feb 23, 2024 19:59:12 GMT
Mine was the same, it turned out to be a Float switch
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