
3.INSTALLATION B-70315EN/02
- 80 -
3.3.4 Check for Leakage within the Oscillator
(1) Using the automatic leakage check function
Usually, use this method to check for leakage.
For how to conduct this check see Section 9.3.
(2) Manual check method
To investigate the leakage status in detail, follow the procedure
below.
(a) Modify the parameters listed below.
PRM.No.15008 bit 6 0 (Automatic aging is disabled.)
PRM No.15240 0 (evacuation completion pressure)
(b) Set the oscillator start switch to ON. The gas pressure inside
the oscillator can be checked with DGN 905.
(c) Alarm No. 4080 is issued eleven minutes after the oscillator
is started.
(d) Set the main circuit breaker of the oscillator to OFF. Then,
turn off the power to the CNC.
(e) Turn off the oscillator start switch, then turn on the main
circuit breaker of the oscillator and the power to the CNC
again.
(f) Check the gas pressure on the diagnosis screen to determine
whether there is any increase in pressure over 15 minutes.
An increase in pressure of within 10 is normal.
(g) After completing the check, turn on the start switch. Then,
after two to three seconds, turn off the switch. After 75
seconds, the oscillator performs purging.
(h) Finally, restore the parameter settings to their original
values.