Unitek Miyachi LW250 Operation, Maintenance And Service Manual page 88

Code Indication on
No. Control Panel Screen
07 Deionize Caution

(****M *cm)
Deionize Trouble

(****M *cm)
08
09 Simmer Trouble
10 Emergency Stop
11 Charge Trouble
12 Over Rate
13 Main Shutter Trouble
990-605 REV B: May, 1997
High
Voltage
–
OFF
OFF
OFF
OFF
–
OFF
LW250 PULSED Nd: YAG LASER
CHAPTER 8: SERVICE
Abnormal
Output
– Purity of D.I. water has dropped.
Leave the cooler running for 20-30
minutes. If the problem persists,
replace the ion exchange resin
cartridge.
ON Purity of D.I. water has dropped.
Leave the cooler running for half an
hour or so. If the problem still exists,
replace the ion exchange resin
cartridge.
ON Check for any abnormalities in the
flash lamp. If there are any, replace
the flash lamp. This signal may be
caused by poor D.I. water quality.
Proceed with the "Deionize"
procedure.
ON The emergency stop signal is
entered. Close the Emergency Stop
input line in the EXT I/O or the
remote interlock input line. Or,
release the Emergency Stop switch
on the control panel.
ON This condition occurs when the laser
power supply's capacitor charging
takes too long or the charge voltage
is too high. Check to see if the input
power supply capacity is low or if the
power cable is too small. Examine
the fuse in the power supply. If it is
blown, replace it.
ON The flash lamp's input power is over
the rating because the repetition rate
is too high. Reduce the repetition
rate.
ON The start signal is entered during the
branch shutter's transition period.
Allow more lead time for the laser
start signal input after the beam
selection signal is entered.
Remedy
8-15