Indeed, may be the cable going from the computer to the external radiator is faulty.
I plugged in an external power supply and the voltage seems to be OK now.
Unfortunately the controller works the same.
When I change pump 2 to Power Preset, it switches back to Follow Pump 1 after a few seconds.
You can see this on the graph for pump 2 (
p2_new_psu.jpg)
- pump 2 runs at 100% perhaps due to due to pump 1 showing no rpm?
- pump 2 dips down when I switch it to Power Preset, which is 60%
- a few seconds later pump 2 switches to follow pump 1 again, and goes back to 100%
- the pump selection tab at the top actually switches from the pump tab 2 to Pump tab 1
I wonder if the OCTO has an issue?
I may try switching it out first as that is considerably easier.