M90 Fusion Splicer 7-20 Operating Instructions
Troubleshooting and Care/Maintenance Issue 02/97
Fault Message
Fault Symptom
Possible Cause Fault Locating Remedy
Fault messages
during splice
analysis
Bad splice -
fuse again?
The actual at-
tenuation can still
be very good
under some cir-
cumstances
(video system)
Unfavorable
splicing parame-
ters.
Reduce the prefusion cur-
rent or prefusion time. The
prefusion time must not be
set too low (default setting:
0.25s).
Unfavorable fiber
type or different
fiber types on
both sides.
Use an LID program if
possible.
Dirt in the optical
system.
Check the monitor
image without fibers
inserted to see if
there are any signs
of dirt.
Ensure there is no dirt
visible on the lenses or
mirror in the area of the
electrodes or on the illumi-
nation LEDs.
Fault messages
during the tension
test
Tensile test
failed
Fiber has frac-
tured.
Ascertain whether
the fiber has frac-
tured at the splice
point or next to it.
With fibers now widely
used, fractures at the
splice point itself generally
only occur if the parameter
settings are extremely
unfavorable.
If the fracture has occurred
next to the splice point, the
stripping tool is most likely
to be faulty.
Fibers slips in the
LID system.
The fiber is not
really fractured.
Clean the LID system to
remove any excess index-
matching fluid. The index-
matching fluid should only
occur in the area of the
mandrel or coupling faces.
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