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Leica ST5020
7. Troubleshooting
7.1 General
The Leica ST5020 is equipped with a troubleshooting system.
If an error is detected, detailed error messages and corresponding user
instructions on what to do are displayed on the touch screen.
For all correctable error conditions the instrument will take corrective ac-
tions to protect the specimens.
Details of all staining protocols carried out are recorded in the daily run
log. The daily run log can be viewed and/or printed in the
VIEW/PRINT
menu.
7.2 Correcting errors
If any programs are in progress, check the job queue containing the stain-
ing programs to be run.
If all programs are completed, check the error log for error messages:
access the error log (either view in menu
VIEW/PRINT --> ERROR LOG
) or
print it out - entries are listed in chronological order.
7.2.1 Excessively high water level in the drain pan
Whenever the water level in the drain pan reaches the level sensor
(
Fig. 72,
1
), an alarm message is triggered and the water inflow into the
water flow cuvettes (7-12) is stopped for safety reasons. The water inflow
is automatically turned on again whenever the water level is below the
level sensor.
Sources of errors:
1. The water drain or the drain tube is blocked or clogged. The water
level in the drain pan has reached the level sensor; the water does not
drain.
2. The water drain or the drain tube is partially clogged or blocked. The
water level in the drain pan has reached the level sensor; the water
drains only slowly.
3. The level sensor is dirty.
