Project "CUBEIT"

[GeoffP]

You should have a higher voltage at the connector. It is a 12V line so with the +- 5% tolerances factored in you should see between 11.4 - 12.6 V on the +12 V Line. Since it works with the other PS, I think the low voltage is the issue. What voltage reading do you get when you measure the +12V line on the other PS? If the EDM's voltage is between the above values, then it has to be something wrong with your other power supply or the wiring job.

I'd look at the wiring first. How did you re-connect any wires that you previously cut? Did you solder them back together or do it another way? If you soldered them, were the solder connections shiny or dull looking after you were finished?

Both pc p/supplies are providing approx 9.9V at the 4-pin molex - this is measuring the black & red wires on the molex - positive & negative. Can someone tell me what is the purpose of the orange & second black wire.

Soldering is fine but thanks for the suggestion

Leak testing - after 3 hours, NO leaks anywhere.
Only bubbles I can see are when I tap the rad, tends to release a surge of bubbles, but they quickly bleed out in the rad

Wiring job on the pump is OK as it is running fine on the EDM p/supply.

Can someone with the MCP655 do me a favour please, pretty please. Unplug it and take a photo of the end of the plug looking into the molex pins, plus if not viewable make a note of red & black cables leading to the molex pins.

Am asking for this as I am 99.999% sure I have the read & black pins on the correct side of the molex - pays to be sure though.

LEAK TESTING - After 3 hours no leaks at all

The only bubbles I see are when I tap the rad, that releases a small surge of air bubbles that are still trapped. They quickly bleed out through the rad though.