
B-70265EN/02 5.TROUBLESHOOTING
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Alarm output condition
Turning the oscillator start switch on causes exhaust to start. This alarm
is issued if the laser gas pressure does not reach the setting of
parameter No. 15240 when the time set in parameter No.15259 has
elapsed.
Related parameters
PRM.15240 Evacuation completion negative pressure
PRM.15259 RUN-ON exhaust time
Related data
DGN.905 Actual gas pressure
No. Cause of trouble Solution
1 Incorrect gas pressure
control parameter setting
Check if the value of PRM No. 15240 is set as
indicated in the attached parameter table. If a
different value is set, set the value specified
in the data sheets.
2 Anomaly of IF PCB
(A16B-2100-0142)
If the gas pressure of the gas circulating
system does not decrease at all, the IF PCB
may be faulty. Check whether the
CP89(Solenoid valve signal) connector on
the PCB is loose. Also check the signals of
the IF PCB. If an abnormal signal is detected,
replace the IF PCB.
3 Gas leakage from piping 1) Check whether any component joints in the
gas circulating system are loose. If a loose
joint is found, tighten the joint firmly.
2)Check whether any components in the gas
circulating system are cracked. If a cracked
component is found, replace that
component.
3)Check whether the O-ring of each
discharge tube is worn. Replace any O-
rings that exhibit excessive wear. If a
Teflon O-ring is ever removed, it must be
replaced with a new one.
4)Check whether there is a hole or crack in a
discharge tube. If a hole is found in a
discharge tube, replace the discharge tube.
4 Anomaly of exhaust pump Check whether the piping between the
oscillator and exhaust pump is normal.
(C1000-E only)