CHAPTER 5: MAINTENANCE
LW500A/LW600A PULSED Nd:YAG LASER
5-6 990-539
Code LCD Screen HV Alarm Corrective Actions
32
Fiber Switch Trouble
(used on hard-wired fiber
interlock systems only)
OFF ON
Optical Fiber connection not detected. The possible causes of
this error are:
– ME-1955 dipswitch set incorrectly
– Fiber Optic Cable is disconnected or faulty
– Incorrect wiring to the fiber connector
– Faulty focus head connection switch
33
34
E. Indicator Trouble
(Output Unit – Focus Head)
E. Indicator Trouble
(Program Unit)
OFF ON
No current is detected through the Emission Indicator(s).
Verify the condition of the Emission lamps and replace as
necessary. Possible causes:
– Faulty Emission lamp in Start/Stop switch (E34)
– Faulty Emission lamp in Focus Head (E33)
– Faulty wiring
– ME-1955 dipswitch set incorrectly
35 Battery Low – ON
Back-up memory lithium battery is low. Possible causes:
– Low (or dead) battery (on Main PCB)
– Faulty Main PCB
38
39
40
41
Fiber Sensor 1 Trouble
Fiber Sensor 2 Trouble
Fiber Sensor 3 Trouble
Fiber Sensor 4 Trouble
OFF
OFF
OFF
OFF
ON
ON
ON
ON
IR not detected at focus head. Possible causes:
– Faulty IR sensor in focus heads
– Faulty wiring
– ME-1955 dipswitch set incorrectly
44 External Interlock Opened – ON
Safety Interlock circuit is open. Possible causes:
– Faulty remote Interlock connection
– External Interlock connector not connected to the laser
– Faulty Interlock PCB
45 Laser Start is not Ready – ON
A process error has been detected. Possible causes:
– Issuing a start command before branch shutters are fully
open (wait at least 20mS after sending shutter command)
– Issuing a start command before the laser is “ready"
– Faulty branch shutter
46 Power Monitor Temperature – ON
Power Monitor temperature is out of specification (45~46C).
If this error occurs, the Power Monitor Assembly is faulty.
47 Overrate – ON
The programmed laser settings exceed the capacity of the
Laser. Error usually appears after the laser has fired. Possible
causes:
– Programmed energy/power too high
– Programmed pulse width is too long
– Repetition rate set too high
– Faulty Power Monitor
48 Fiber Overrate – ON
The programmed laser settings exceed the capacity of the
Fiber Optic Cable. Error usually appears after the laser has
fired. Possible causes:
– Programmed energy/power too high
– Programmed pulse width is too long
– Repetition rate set too high
– Faulty Power Monitor
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