pacnw
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Posts: 187
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Post by pacnw on Feb 9, 2024 17:25:44 GMT
I'm stumped on a machine and hoping someone has seen this. 2008T without bibag at 30K hours. in dialysis mode and service mode the temp fluctuates up to abot 44.0 degrees then fall back down to 37.0 degrees before the heater turns back on and up it goes again.... Typically this is the power control board, heater, triac that cause this but also ties into sensor board, acutator board, and power logic board with the last board being motherboard. once in a while NTC 2 or 3... All of these have been replaced with known good. Same issue still persists... I even changed the distribution board. i've done a back to back and the issue follows the machine. New actuator, sensor and power logic cables. Not sure where else to go... any ideas... even swapped in a new power supply just ot verify the system. I don't get stumped very often... any ideas??
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Post by dave74 on Feb 9, 2024 19:47:54 GMT
When you say the problem follows the machine, do you mean the problem is in the electronics and not in the hydraulics?
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pacnw
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Posts: 187
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Post by pacnw on Feb 9, 2024 20:34:49 GMT
Yes it's in the electronics... I've replaced everything twice. No idea what else it could be
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Post by dave74 on Feb 10, 2024 0:32:20 GMT
Are you sure the hydrochamber is OK? I have seen problems in the old hydroblocks cause weird temperature problems.
Does it make any difference if temp comp is on or off?
Could there be a problem with the 02 chip?
I don't know what else there is. It sounds like you have replaced nearly every part associated with the heater.
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Post by gnurk on Feb 11, 2024 13:14:36 GMT
have you tried the sensor and act cables, also try another power supply the transformer used to have a fuse in line with the windings what about the sensor board in t and c mode
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pacnw
Full Member
Posts: 187
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Post by pacnw on Feb 12, 2024 5:15:40 GMT
I haven't tried the hydrochamber. They sent me to Arizona for a week to help out down here... i'll give that a try when I get back... Yes GNURK I have tried all cables and sensor board too. even swapped out the power control board and triac with no change and to be sure I ruled it out I even swapped in an whole new power supply.... still no change. The hydrochamber is something I haven't tried... Thanks Dave for the idea....
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BMF
Junior Member
Posts: 86
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Post by BMF on Feb 12, 2024 17:49:32 GMT
With 30k hours, I'd look at either the batt ram or the function board itself. Sometimes as that batt ram starts to fail, you get some weird non typical symptoms. It's definitely worth a shot. I'd start with known good for sure.
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pacnw
Full Member
Posts: 187
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Post by pacnw on Feb 12, 2024 19:07:04 GMT
I've changed every board out with new and also known good. Mother board, function board, actuator board, distribution board, power logic board and all cqbles to each board. Back to back test the issue follows the electronics. This is a classic example of when the trouble shooting guide doesn't help. I follow that and it tells me it's in the boards.... Then i got to thinking maybe it's multiple boards so I changed them all at once... still have the same issue. it's not in the card cage as that has all been swapped out more than once with new and known good boards. Power supply has been changed out too, twice. NTC 2 and 3 changed twice... Heater rod changed twice... i'm just lost on this one.... No Flow errors show up at all. Like I said I don't get beaten by a machine very often.... this one has me stumped.
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BMF
Junior Member
Posts: 86
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Post by BMF on Feb 14, 2024 15:41:58 GMT
I've changed every board out with new and also known good. Mother board, function board, actuator board, distribution board, power logic board and all cqbles to each board. Back to back test the issue follows the electronics. This is a classic example of when the trouble shooting guide doesn't help. I follow that and it tells me it's in the boards.... Then i got to thinking maybe it's multiple boards so I changed them all at once... still have the same issue. it's not in the card cage as that has all been swapped out more than once with new and known good boards. Power supply has been changed out too, twice. NTC 2 and 3 changed twice... Heater rod changed twice... i'm just lost on this one.... No Flow errors show up at all. Like I said I don't get beaten by a machine very often.... this one has me stumped. I'd guess since the problem follows the electronics, the one thing most people don't change is the eeprom because it's so expensive. I'm sorry to say if it were my machine and I did everything you have done with no change in results, I'd be gulping and spending some money on a new eeprom. |
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phillipashleyludlow
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Post by phillipashleyludlow on Feb 14, 2024 21:22:19 GMT
honestly i think its alot cheaper than you think, esp if your in the fresenius network, either as a clinic, jv or partner. the clinic cost is less than 100$ w overnight shipping, 120-130 for jv, 210 for partner.
granted the sales book shows it as 2500, but i dont think most ppl useing 2008t dont have some kind of discounted agreement in place for parts.
as with anything, this is my opinion and not represitive of my employer, nor a legally binding agreement or quote.
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Post by didhesolveit on Feb 26, 2024 20:31:02 GMT
pacnw, Did you ever find a solution to this problem?
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pacnw
Full Member
Posts: 187
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Post by pacnw on Feb 26, 2024 22:58:53 GMT
Triac was wired incorrectly. That is what caused the temp swings.... Bonehead mistake....
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Post by dave74 on Feb 27, 2024 1:44:06 GMT
Thanks for posting the fix.
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