Hi all.
Been out of the hobby for sometime.

I have 6 tunze 6105 units controlled by the profilux, but I’m battling with the “newer setup”

I had 3 pumps per L channel, using the tunze 1 and 2 cables and splitter but I cannot get this to work currently.

So my new scenario:
6x tunze 6105

3 x tunze 1 cables
3 x tunze 2 cables
4 splitters

I currently can get 5 pumps to work, but when I add the 6th unit, the pumps power down.

So I am using L7/8 and L9/10

L7/8 - 2x tunze 1 and 1x tunze 2 - stream 1/2
L9/10 2 x tunze 2 and 1x tunze 1 - stream 3/4

Stream 1 pump 1
Stream 2 pump 2
Stream 3 pump 3
Stream 4 pump 4


Any suggestions as to what could be causing the problem.

Thanks