Problem about FAN!

Shnihuang

It is good to be every
I have a question about controller S4C,our company have IRB6400 and 6400S.
Since several months.the error messenger 37056 cooling fan error fault always happened.
When check TP Service>>view>>sys info>>current state.
It's show FAN 1 not running. FAN 2 running slow.FAN 3 running slow!
So I pull down it in cooling system of cabinet!
Four fans all operate, it is all normal to check the rotational speed and flow.
Even I buy from fan manufacturer PAPST and replace with the fund fan.
ERROR happens equally !I call the ABB engineer tell my question!
They tell me Do not need to take notice of under the situation not influencing the equipment .
Can feedback the signal to get rid of in way of bypass too!
Question:
1.current state show FAN1.2.3 Why does the institute refers to !
2.It's possible bypass the feedback signal in circuit.
Thank you for your reading.   

spaik

Did you check the power supply in the computer box? I had similar situation and it was power supply problem..

 

Shnihuang

 

Hi! Spaik

The power supply output 24vDC  it's ok!

There are three manipulators in our department, all present the same trouble !