Ninja 3 fan doesnt spin (after 1 year working)

[Zyxel]

Hi all

I am having problems with the fan of my Ninja 3 cpu cooler.

4 days ago, when I turned on the computer I found out that the CPU fan wasnt spinning (because of the "CPU Fan error" warning), and I tried to plug another fan in the CPU_FAN motherboard connector (the fan of the stock cpu cooler) and, when I started the computer it spinned, so I thought that the Ninja 3 fan was wrong and I decided to take it to the store where I bought it in order to get it replaced.
But next day, I turned on the computer and the fan was spinning at the correct RPM :S so I didnt take it to the store, and the next 2 days it worked too (yesterday I didnt use the computer), but today I started the computer and I got the "cpu fan error" warning again...

And here is my doubt:
today I have tried to plug the fan in another connector of the motherboard instead of the CPU_Fan one, and it worked :s and it seemed to me (because of the noise) that it was spinning faster than normal, and I found in the motherboard user guide that the connector in which I plugged the fan(CHA_FAN2) is a 12V one (I dont know if this is too much voltage, because it doesnt say the CPU_fan connector's voltage but I thought that the normal voltage for a fan was 5V, that would explain the higher speed I think, sorry for my ignorance)

here is the page of the motherboards manual with the information of the different fan connectors:


Please help, Why does the fan spin when pluged in to the CHA_Fan connector but not in the CPU_Fan one? Can I use the computer with the fan connected to the cha_fan connector? For what I said, do you think that it is the cooler fan what is broken, or it can be the motherboard's cpu_fan connector? and why did the fan just stop spinning after 1 year of working properly? :S

thank you, and sorry for my english (Im spanish)

[Sansay]

Hi Zuxel,

The fan in the "CPU_FAN" plug.
The warning "CPU Fan Error" appears when the "BIOS Settings" for the CPU fan is not correct.
Please check in the BIOS. There should be possible to reduce the "minimum CPU fan speed." Then there is no error.

[Zyxel]

Originally Posted by Sansay

Hi Zuxel,

The fan in the "CPU_FAN" plug.
The warning "CPU Fan Error" appears when the "BIOS Settings" for the CPU fan is not correct.
Please check in the BIOS. There should be possible to reduce the "minimum CPU fan speed." Then there is no error.

Hi

I know that the cpu cooler must be connected in the cpu_fan plug, I have had it connected there for 1 year XD but now it doesnt work, but it works (and at higher speed) when connected to the CHA_FAN2 plug, thats why I ask if it is safe to use the computer with the fan connected to the cha_fan2 plug

I dont know if I understood you well, but I cant solve the problem by reducing the "minimum cpu fan speed" because the problem is that the cpu fan speed is 0 XD

Thank you

[Oli]

Please go into BIOS.
Go to the QFAN section. Select the following mode for QFAN CPU: "High" or "Performance".

This should raise the overall fan speed on the CPU fan header. If the fan still doesn't spin up it may be faulty.

The PWM control in the fan does then does no longer seem to work because when you connect the fan to the CHA2 header it just runs full speed with 12 volts over the 3pin connector (control signal on the fourth wire is missing).

Please keep in mind what Sansay said & meant: If the PWM level in QFAN is set to "normal" or "silent" with Scythe fans it is possible that they start rotating only when higher temperatures are reached!

It is the same here: I am using 2 Scythe PWM fans with QFAN "silent" and they run at 200 rpm. Se this means nearly any other fan would just have stopped under these circumstances.