Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 51)

PC NC Maintenance Manual Chapter 4: Troubleshooting
4-30
(11) Skip Function (G31) Failure
The skip signal has not been input.
• Check the ON/OFF status of the skip signals.
• Check the operation of proximity switches.
PC NC Alarms Not Indicated By Alarm Numbers
(1) Fuse F1 blown on JZNC-JFC 10 card of CPU Rack.
When the 0.3 A F1 Fuse is blown on the JFC 10 card, the “3002
Emergency stop” Alarm occurs on the CNC.
In the diagnostic, when the # 3500 bit 2 * ESPS signal is ON, and
the “3002 Emergency stop” alarm still occurs on the PC NC Sta-
tus bar, check the 0.3 A F1 Fuse on the JFC 10 card.
(2) Fuse F2 blown on JZNC-JFC 10 card of CPU Rack.
When the 5A F2 fuse is blown on the JFC 10 card, the “3001
Servo Alarm and 3002 Emergency stop” alarms occur. Check the
LED D4, just above CN04 Connector of the JFC 10 card of CPU
Rack. If this LED is not lit, the F2 Fuse has blown. Replace the
fuse.
(3) The Servo ON and Shut Down button connections are not con-
nected, or are wrongly connected.
When the Servo ON and Shut Down buttons are not connected to
the CN12 Connector, or are wrongly connected, “3002 Emer-
gency stop and 3001 Servo alarms” is displayed on the PC NC.
Check that the Servo ON and Shut Down buttons are properly
connected to the CN12 Connector.
Note: When the F1 or F2 fuses are blown, replace them with
the same type of fuse.
Touch Screen Maintenance
The touch screen requires periodic cleaning as follows.
1. Whenever chips fall on the display unit.
2. Whenever coolant falls.