I’m trying to replace 2 very noisy fans in my Proline UPS I2000 and I had to do some research to figure out what was going on. I’ll add as I find more useful information.
My issues started when I could not find a data sheet for my AVC F9025R12UR, which I gather from the new model numbering is a 90mm x 25mm, R= Hydraulic Bearing, 12 = 12V & UR
2, 3 & 4-wire Fans
2 wire
- Pin 1: Black = Ground(-) or Blue
- Pin 2: Red = Positive(+12V)
3 wire
Standard
- Pin 1: Black = Ground(-) or Blue
- Pin 2: Red = Positive(+12V) or Yellow
- Pin 3: Yellow = Tach Output, sometimes Blue or Green
Looks like the tach reading is basically a voltage i.e. 2.0V = 2000 RPM and 1.5 = 1500 RPM
Industrial Rotor Lock Warning
- Pin 1: Red = Positive(+12V)
- Pin 2: White = Rotor Lock Warning
- Pin 3: Black = Ground(-)
The rotor lock pin has a small voltage +-0.1V when running and goes high when the motor is stopped.
4 wire
- Pin 1: Black = Ground(-)
- Pin 2: Red = Positive(+12V) or Yellow
- Pin 3: Yellow = Tach Output, sometimes Green
- Pin 4: Blue = PWM Control
Useful Fan Info
Delta Fans
–F00 suffix is Tach (frequency) output (open collector), –R00 suffix is Rotor Lock warning (open collector, goes high when locked).
