2001 VF3 cabinet fan problem

C

comp 670

Aluminum

Joined

Mar 5, 2016

• Dec 24, 2016

• #1

I have a 2001 VF3 and the fan on the cabinet door quit working. I checked for voltage and have 114.7 volts there so I figured the fan was bad and bought a new one but it would not work either. So then I plugged the "bad" fan into the plug for the fan right below the servos and it works. Plug it back into the door cabinet plug and nothing, even though it shows 114.7 volts?

The "output" on the circuit board is P5 and I get 114.7 volts there. Also checked P6, the one that powers the other fan (the one that works) and same voltage. If I plug the fan that works into P5 I get nothing even though it shows 114.7 volts?

What am I doing wrong to figure this out?

 

M

magno_grail

Hot Rolled

Joined

May 29, 2014

Location

ca, US

• Dec 24, 2016

• #2

Measuring AC or DC? And are you measuring with the fan connected? If the fan is controlled by a semiconductor it could be leaking enough current to measure the full voltage but not able to supply the current required for the fan. Have you plugged the old or new fan into the P6 and vice versa (other fan into P5)?

 

C

comp 670

Aluminum

Joined

Mar 5, 2016

• Dec 24, 2016

• #3

Measuring AC voltage. Both fans work when plugged into P6. (the one for the fan below the servos) Neither fan works when plugged into P5 (door fan output).. I have not measured voltage with the fan plugged in.

Could both fans be run off P6? or would that create a overload on that circuit? Is there some other place in the cabinet I can get 115V to run the fan without screwing something else up?

 

M

magno_grail

Hot Rolled

Joined

May 29, 2014

Location

ca, US

• Dec 24, 2016

• #4

My machine is a '91 so probably not the same inside. I do not know the current rating of the P5/P6 outputs but I would guess Haas did not provide that much over current rating. If the fan is supposed to run whenever the machine is on you could find the 115VAC leg of the power wires that supplies the output board and wire into that after the breaker.

 

M

Montrels14

Plastic

Joined

Jul 13, 2009

Location

Wisconsin, USA

• Sep 23, 2017

• #5

I ran into this too. Turns out Haas went' "Green" and the fan only comes on when the electrical cabinet reaches a certain temperature.

 

H

haastec

Hot Rolled

Joined

Mar 8, 2010

Location

Southwest, USA

• Sep 25, 2017

• #6

You should be able to find some spare 115v plugs connections at the Power distribution PCB; the one right next to the main disconnect.
These will be energized whenever the machine is on.

 

M

mmurray70

Stainless

Joined

Jan 11, 2003

• Dec 5, 2023

• #7

Montrels14 said:

I ran into this too. Turns out Haas went' "Green" and the fan only comes on when the electrical cabinet reaches a certain temperature.

Click to expand...

Can anybody else here confirm this is right? I have the same problem. Fan is not running but i have voltage at the plug.

Put the fan on a bench and apply power directly and it runs fine. Just want to be sure this is how its designed to work. Seems strange to have a cnc cabinet with no fan.

 

Houdini

Titanium

Joined

Nov 28, 2017

• Dec 5, 2023

• #8

Quote from an older post "I used a hot air gun to heat the sensor switch and it didn't turn on until 50 degrees C (120 deg F) I think this is pretty hot like an oven really"
So it would seem so. temperature activated.

 

M

michael.guzzi

Plastic

Joined

Jan 2, 2012

Location

Caxias do Sul

• Dec 5, 2023

• #9

Can confirm that the 1999 VF-5 I used to run took a while to turn this fan on.