Firmware V3.00
05.08.2019
23/100
5.3.2 Defrosting
Defrosting (available only with the first five temperature sensors Rx.1 .. Rx.5) frees the evaporator of ice
forming from normal operation. Defrosting always takes place either by off-cycling the compressor. During
defrosting, temperature control of the refrigeration point is inactivated.
Rx.1 .. Rx.5: 5 temperature sensors for defrosting (and cooling) with recording
Defrost start
Defrosting can only be started by the internal timer (Menu 3-2) and requires temperature to be lower than
defrost termination temperature.
The controller checks whether the condition for defrosting is fulfilled before defrosting is actually initiated.
The condition is: Temperature of the temperature sensor lower than defrost termination temperature
The next defrost cycle cannot be started before the safe defrost time (defrost parameter) has expired
even when defrosting is terminated by the temperature sensor. Defrost times should preferably not be
set between 02:00 and 03:00 hours so as to avoid problems of missed or duplicated defrosting when
the clock changes to or from daylight saving time.
