Leica Biosystems CM1850 UV - Manual (Page 33)

33 Leica CM 1850 – Cryostat
8.1 Error messages in the display
Error messages are displayed on the clock panel as follows: EO: XX. The
following error messages might occur during operation:
8. Troubleshooting
Error Description Remedy
20 Calibrating error; possibly defective controller board. Turn the instrument on again.
If the error is displayed again:
Call service.
21 Clock battery on the controller board empty. Call service.
22 Microtome wet. Dry microtome.
23 Cryochamber temperature out of range of indication. Remove cause.
(from -35 °C to +55 °C)
24 Short circuit at the temperature sensor Call service.
of the chamber cooling system.
25 Breaking of the temperature sensor Call service.
of the chamber cooling system.
26 Short circuit at the temperature sensor of the evaporator. Call service.
27 Breaking of the temperature sensor of the evaporator. Call service.
8.2 Temperature control button
On the back of the cryostat cabinet there is a temperature control button (1) . If the temperature of the
cryochamber exceeds 60 °C the switch is automatically activated and turns the instrument off.
Possible causes and remedies:
• Temperature of the direct surroundings is
constantly higher than 40 °C.
-->Drop the temperature of the direct sur-
roundings.
• When setting up the instrument the minimum
distance of 10 cm to walls and furniture was
not kept.
--> Keep the minimum distance.
•
The ventilation slits of the liquefier are dirty.
--> Clean the ventilation slits (see 9.3.1).
Fig. 21
After eliminating the possible source of error, push the temperature control button (1) to turn the in-
strument back on. If the instrument fails to turn on, make a service call.
Fig. 20