| Appendix
160
YLS-K
Message
Unexpected earth fault
Type
Warning
Description
The warning Unexpected ground leakage occurs when the voltage in a
laser module between the minus pole (-) and ground (GND) exceeds the
limit value.
Possible
causes
Internal module error
Analysis / trou-
bleshooting
ð Check which laser module is causing the warning.
ð To do this, open the rear door of the laser and remove the safety
fuse of the first laser module.
ð If the Unexpected ground leakage warning does not disappear,
remove the next safety fuse.
ð Check whether the error message is still present.
ð Repeat this process until the Unexpected ground leakage warn-
ing disappears.
ð Leave the safety fuse of the laser module that is responsible for
the warning open. You can close the safety fuses of the other laser
modules. The laser can be put back into operation (with a slightly
reduced power).
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