
B-70254EN/01 5.TROUBLESHOOTING
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5.3 RESPONDING TO ALARM MESSAGES ON THE SCREEN
ALM No.4061
AD converter 1 is not normal.
No. Cause of trouble Solution
1 Anomaly of AD
converter 1
It is necessary to replace AD converter 1
mounted on B8 on A16B-2100-0141.
Call the FANUC service center.
2 Anomaly of IF PCB I It is necessary to replace the IF PCB (A16B-
2100-0141).
Call the FANUC service center.
ALM No.4062
AD converter 2 is not normal.
No. Cause of trouble Solution
1 Anomaly of AD
converter 2
It is necessary to replace AD converter 2
mounted on D7 on A16B-2100-0141.
Call the FANUC service center.
2 Anomaly of IF PCB Replace the IF PCB (A16B-2100-0141).
ALM No.4063
Anomaly of laser power supply unit
This alarm is displayed if an error occurs in the laser power
supply unit or the power supply unit performs protective
operation. Fully check the cause of the error because the power
supply unit also performs protective operation if an error occurs
in other than the power supply unit itself. This alarm will recur
after replacement of the power supply alone without eliminating
the root cause.
(1) Preliminary inquiry
Check item Solution
1 Checking parameters Confirm that all the parameters described in
the attached parameter sheets are correctly
set.
In case there exists any error, correct it.
2 Checking the discharge
tubes
1) Check whether the mounting bracket of a
discharge tube are loose or missing.
2) Check whether the electrode has
separated.
3) Check whether the inside and outside of a
discharge tube is dirty.
4) Check the discharge tubes for a crack.
5) Check the O-ring of each discharge tube for
damage.
3 Checking the trigger
electrode
Check whether the trigger electrode is dirty.
4 Checking the matching
box
1) Check whether the matching box fan stops.
2) Check whether any coil in the matching box
becomes black.