Bad 6100:10?

[G_cuvier]

Hi:

I have four 6100:10's on a 7095 Multicontroller. On Saturday I awoke to the annoying, (which isn't a complaint), alarm. Upon investigation I determined that the pump on channel 2 wasn't functioning.

I promptly turned off the pumps and removed all the pumps, gave them a scrubbing with a toothbrush and an overnight soak in white vinegar. I reassembled them expecting the alarm to go away only to find that it didn't. I disassembled the offending pump and switched the impeller with one from another pump. It didn't work. I switched out each impeller and they all failed in the channel 2 pump body but the impeller that came out of the channel 2 pump body worked in each of the other bodies. I put the channel 2 body and impeller back into the vinegar for another 24 hours only to find the same problem.

The impeller "housing" on the channel 2 pump body does seem noticably "rough" at about the point where the joint between the impeller magnet and the propeller would be in the "housing".

Is there anyhting I can do at this point?

 

[rvitko]

Send it in, it sounds like the motor is bad but I can check it out and if it is less than 2 years old it is under warranty.

 

[G_cuvier]

Just mail it to the Tunze USA address in the other posts?

 

[rvitko]

Yes.

 

[G_cuvier]

Will do...

Thank you very much for your rapid response.

One final question...

I now have three pumps on the multicontroller. If I remove the channel 2 plug from the controller and try to start the system it still alarms when channel to was supposed to start. Can I stop that or do I have to wait till I have 4 pumps back on the system?

 

[rvitko]

The alarms are in the drivers of each pump, not the controller. The controller does not produce an alarm, it would mean that another pump is locked up or broken.

 

[G_cuvier]

Ok.. Silly question:

Since one pump is in the tank, to give some increased flow, but the other three are out in the air, do the two un-failed pumps, (they turn their props seemingly fine), know immediately that they are out of water?

All four pumps have little calcium or any other fouling because I run relatively low Ca levels, (400 ish when I try to elevate - otherwise around 350-375), and they all seem to pump well except the failed one.

 

[rvitko]

Yes, when they run dry, they sound an alarm, if the inside of the pump is wet you may not get an alarm for a while but basically the sensor detects a difference in how fast it should be rotating, vs how fast it is rotating which is reduced by the friction.

 

[G_cuvier]

Thanks, I'm all set now.. I'l box up the pump this weekend and send it on...

Thanks again for your help.