Quote from: babycicak on April 18, 2017, 07:23:41 AM

Hi, Im changing my fan to 2,7A, with 6000rpm, after change, the miner both s7/s9 cant detect the fan., red light on after 5 min and machine stop hashing. Anyone have same problem before? please help.

Does your new fan have 3-Wires?
Needs to feed a tachometer signal back to the controller card.
In times of need I've put a fan on the miner and connected to the power supply direct.
Then I've left an old fan plugged on the controller and cable tied it up in the rack.
New fan moves air at full power, old fan keeps the controller happy.

Apart from that what is the model of the fan you got?
Delta do one which is the same as the S9 OEM fan but hard to get here in the UK.