
5.TROUBLESHOOTING B-70315EN/02
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ALM No.4090
LASER NOT GENERATE
This alarm is issued if an attempt is made to radiate a laser beam
when the laser is not in the oscillation ready (LSTR) state.
Alarm output condition
This alarm is issued if the oscillation ready (LSTR) state is not
established during beam output.
Related data
F221#6 Oscillation in-progress signal
ALM No.4094
VANE PUMP
This alarm occurs when the thermal switch of the magnetic
contactor for the exhaust pump is tripped.
Alarm output condition
This alarm is issued if the exhaust pump alarm RPAL becomes "0" after
the start of the oscillator and immediately before the completion of
purging.
Related data
DGN.972 RPA Exhaust pump start
DGN.961#3 *RPAL Exhaust pump alarm
No. Cause of trouble Solution
1 Anomaly of exhaust
pump
Check the following items.
1) Check whether specified oil is provided at an
appropriate level. Supply specified oil as
explained in Chapter 4.
2) Check whether the exhaust filter of the pump is
clogged. Replace the exhaust filter as
explained in Chapter 4.
3) Check whether the exhaust pump outlet is
clogged to disable exhaust operation. Remove
the cause of the clogging.
4) Check whether the exhaust pump turns in the
reverse direction because of a problem in
phase rotation. If the steps above do not clear
the fault, replace the exhaust pump.
2 Exhaust pump
operation abnormal
Replace the exhaust pump.
3 Anomaly of IF PCB If the thermal switch of the contactor does not trip,
the IF PCB is abnormal. Replace it.
4 Signal cable broken Check the cable connections.
ALM No.4099
GAS PRES. NOT REACH
After the discharge start signal (HV ON) is turned on, the gas
pressure in the discharge tube is compared with the setting of the
pressure in the tube during oscillation. This alarm is issued if the
pressure does not reach the tolerable amount by which the target
pressure is not reached.