you need to connect all 4 ports with the PCIE-6 pins and then use a paperclip or the switch from Hashra to "start" the psu. Usually there is a switch that Hashra delivers with the Miner that can be plugged into the PSUs respective port and can then be used to start the PSU but a clip will do as well... Give me a minute and I will send you more infos about the PSU "startup" process.
I did this before, but my PSU refuse to start.
Only in the combination described above, the PSU's fan it is spinning.
I need another PSU ?
And BTW, it is normal to have a red led on the Pi ?
If you have the 14Mhs version you need to attach the PSU to the TOP two power sockets. On the 14Mhs version the bottom power sockets are connected to nothing inside, that's why they won't work.