
B-70315EN/02 5.TROUBLESHOOTING
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ALM No.4077
ABSORBER TEMP.
This alarm is issued if the temperature absorber exceeds the
allowable value. In the usual operation, this beam absorber is
irradiated by the rated output only during the laser output
compensation conducted after the start of the oscillator.
Alarm output condition
This alarm is issued if the absorber temperature signal becomes "0"
after the start of the oscillator and immediately before the completion of
purging.
Related data
DGN.961#7 *ABT Absorber temperature
No. Cause of trouble Solution
1 Insufficient cooling
water
The amount of cooling water being supplied to the
beam absorber may be insufficient. Check whether
the cooling water tube between the water branch
unit and beam absorber is clogged. If the tube is
clogged, replace the tube.
2 Temperature
sensor wired
incorrectly
Check if the cable is securely connected to the
temperature sensor. If not, reattach the cable.
3 Temperature
sensor abnormal
The temperature sensors are designed to be
actuated by a specified temperature or higher. If a
temperature sensor is actuated at a temperature
lower than the specified temperature, replace the
sensor.
C1000-E to C4000-E One sensor for 80°C
C5000-E Two sensors for 80°C
C6000-E One sensor for 80°C and one sensor for
90°C
4 Absorber
abnormal
If the temperature rises when water is flowing,
replace the absorber.
ALM No.4078
LASER TUBE PRES.
The gas pressure is monitored after the discharge start ready
condition (LRDY) is established. This alarm is issued, if the
monitored gas pressure deviates by
±50 (665Pa) from the set gas
pressure.
Alarm output condition
This alarm is issued if the actual gas pressure falls out of the set gas
pressure ±50 after LRDY is established. The pressure is not monitored
from the time the HV ON signal is turned off until LRDY is established.
Related data
DGN.905 Actual gas pressure