
B-70254EN/01 5.TROUBLESHOOTING
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ALM No.4075
Condensation
A condensation sensor is mounted near the output mirror holder
in the oscillator. This alarm occurs when the sensor detects
condensation. After this alarm occurs, the alarm status cannot be
reset until the condensation status is released. Do not blow hot
air of 60°C or higher on the condensation sensor. Flowing dry air
in the oscillator is effective.
No. Cause of trouble Solution
1 Tool low cooling water
temperature
Set the water temperature near the room
temperature (plus about 1°C).
2 Connecting anomaly of
condensation sensor
cable
3 Anomaly of condensation
sensor
It is necessary to replace or adjust the part.
Call the FANUC service center.
ALM No.4076
Laser gas pressure decrease
This alarm is issued, if the monitored laser output is much lower
than the specified laser output, that is the monitored laser output
is lower than the specified output by a value specified in
parameter No. 15271.
No. Cause of trouble Solution
1 Lack of output from laser
power sensor unit
2 Connecting anomaly of
the cable of laser power
sensor unit.
3 Anomaly of intermediate
PCB B
A16B-1600-0361
It is necessary to replace or adjust the part.
Call the FANUC service center.
ALM No.4077
Overheat of beam absorber
Laser beam is introduced into the beam absorber, when the
oscillation takes place with shutter closed. This absorber is
water-cooled and sends alarm when the temperature of the
absorber exceeds a critical one. In the usual operation, the
irradiation of the absorber takes place only during the calibration
after the oscillator start.
No. Cause of trouble Solution
1 Insufficient cooling water
2 Temperature sensor
wired incorrectly
3 Temperature sensor
abnormal
4 Absorber abnormal
It is necessary to replace the part.
Call the FANUC service center.