Need Help! 1999 VF3 HAAS Alarm# 175 - CNCzone.com-The Largest Machinist Community on the net!

rnorris · #1 09-10-2010, 10:58 AM

I have a 1999 VF3 Haas 20HP vector drive vertical mill. Was homing out XYZ. Shuttle in then went into alarm #175 ground fault detected. I burned out R3 6.8 ohm 20 watt resistor on the IO PCB board. Has anyone else had this problem, if so, how have you corrected this issue. HELP.

KenFoulks · #2 09-10-2010, 03:27 PM

There is most likely a short that needs to be located before the board is replaced. Based on the pre-condition description provided, I suggest checking the tool changer motors.

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