Leica Biosystems CM1860/CM1860 UV - Manual (Page 32)

32 Instructions for Use V1.4 – 10/2012
6.2.4 Activation of the Peltier element (option)
The Peltier element provides additional cooling for the freezing stations. Upon
activation of the Peltier element, the compressor of the cooling system is
started after 40 seconds to reinforce the thermal conductivity effect.
Display "PE" (= Peltier element).
Activate it by pressing the key.
If the Peltier element has been activated (Fig. 18a ), a blue LED in the Peltier
symbol lights up. After the activation, the display switches to the number "10"
(the Peltier element now cools down for 10 minutes). The remaining cooling
time is always shown in the display.
The Peltier element turns off automatically after 10 minutes.
When only 4 minutes are remaining, a dot appears after the number 4 ("4.").
From this time on, it is safe to shut off the Peltier element early.
To shut it off early, press the key again.
After the shutoff, the display returns to "PE".
The quick freeze shelf may become hot during defrosting! There-
fore, do not touch it!
You can activate the manual defrost of the quick freeze shelf by pressing
the key (continuous tone sounds), followed immediately by the key
(continuous tone stops). The display flashes during the defrosting (duration
12 min.).
To shut off the manual defrost early, press the key, followed immediately
by the key. The quick freeze shelf can become hot during the defrosting
process. The defrost time is 12 minutes.
The quick freeze shelf and cryochamber cannot be defrosted at the
same time.
6. Operating the Instrument
Fig. 18
Fig. 19
6.2.5 Manual defrosting of the quick freeze shelf
Fig. 18a