[BadTad]

Hey Folks,

I'm getting fan alarms for both X/Z inverter units, but the fans are working fine. I was able to clear the alarm once by shutting down/turning back on, however now it won't clear at all and I can't run the machine like this.

Alarm
444 X AXIS: INV. COOLING FAN FAILURE
444 Z AXIS: INV. COOLING FAN FAILURE
608 X AXIS: INV. COOLING FAN FAILURE
608 Z AXIS: INV. COOLING FAN FAILURE

Attachment 238056

Any ideas?

[underthetire]

I'm assuming its a 2 in 1 drive? Its the fan inside the drive, the drive also monitors fan speed like a PC.

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[BadTad]

I believe they are separate drives - I can look down through the top and see the fans spinning on each unit. I tried a bit of compressed air to see if it made any difference.. it did not.

[BadTad]

You are correct, it looks like a 2 in one unit. I can see the fan at the top working great, I even pulled it with the quick disconnect lid and cleaned the contacts. Is there another fan inside?

Attachment 238058

[BadTad]

I guess I'm going to try replacing the fan, even though it's working... it's possible the tachometer has failed.

[cjfisher]

BadTad,

It is unlikely that the fan's tach has failed. As Underthetire mentioned you need to look inside the drive. About the best comparison I can make is a desk top computer. They all have fans in the case (aka the fan that you currently are looking at and which is running), however many computers also have a fan on the processor, chipset and/or video card that can generally not be seen without taking the computer apart <- this is the fan that Underthetire is alluding to. It is likely attached to the drives processing unit and will be a smaller fan.

Cjfisher

[BadTad]

Thanks - I looked inside and did not see anything obvious, I'll ask fanuc if there is another fan in the unit and add it to my order if there is.

[underthetire]

There may be one on the back of the aluminum heatsink area, not sure on that. Fanuc should have the break down parts sheet for that unit.

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[BadTad]

Found the other fan, I had to pull the drive, it was on the heatsink on the rear that I could not see. Getting it on order as well. Hopefully will be back up and running tuesday. I wish I would have kept track of everything I had to do to get my shop going, it's taken me almost 2 years to gather equipment and repair it...

[BadTad]

Should have everything tomorrow, I'll let you know if that takes care of the problem.. otherwise alarm points to drive..

[BadTad]

Just wanted to update you and let you know that the fan install (both of them) fixed the problem and I have no more alarms!

Attachment 238536
Attachment 238538