CHAPTER 5: MAINTENANCE
LW500A/LW600A PULSED Nd:YAG LASER
990-539 5-7
Code LCD Screen HV Alarm Corrective Actions
49
Setting Error
(duration too short)
– ON
Pulse width setting ≤ 00.2ms. Error usually appears before the
laser has fired. Set pulse width to > 00.2ms.
50
Setting Error
(overlimit of Max Pwr)
– ON
The programmed laser settings exceed the capacity of the
Laser. Error appears before the laser has fired. Once this error
is present, all laser settings will revert back to the settings
before the change. Lower the process settings.
51 Fiber Setting Error – ON
The programmed laser settings exceed the capacity of the
Optical Fiber. Error appears before the laser has fired. Once
this error is present, all laser settings will revert back to the
settings before the change. Lower the process settings.
52 Memory Trouble – ON
CPU memory trouble. Possible causes:
– CPU back-up battery is low on Main PCB
– Re-initialize Laser (all settings will be erased)
– Bad/loose connection on Main PCB
– Faulty Main PCB
53 Power Feedback Trouble – ON
Problem with laser power feedback system. Possible causes:
– Faulty Power Monitor
– Faulty Discharge Unit
– Faulty Main PCB
54
Deionize Caution
(****M/cm)
– –
Resistivity of secondary cooling water (2M <
r
3M) is
low. If this error does not clear after 50~60 minutes, replace
the Ion Exchange Resin. Possible causes:
– Old Ion Exchange Resin
– Short circuit across sensor probes
– Water leakage in sensor
– Faulty Main PCB
56 Overlimit of Laser Power – –
Output Energy exceeds “high” set point. Verify the
ENERGY
HIGH value is correct.
57 Underlimit of Laser Power – –
Output Energy falls below the “low” set point. Verify the
ENERGY LOW value is correct.
59
60
61
Time-Share 1 Trouble
Time-Share 2 Trouble
Time-Share 3 Trouble
OFF
OFF
OFF
ON
ON
ON
Time-Share Shutter position not detected or does not change
position within specified time. Possible causes:
– External Interlock open during Power-Up Self Test
– Incorrect External I/O implementation
(do not send Laser
Start while Main Shutter is opening )
– Faulty Time-share Shutter
– Faulty Interlock PCB
– Faulty Main Board
To Next Page
Loading...
