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Doc. No:
560001 EG Page:11 Ed.1" 08-2014
From ser. no.:
Algoritmo defrost/defrost algorithm Ecostore ONLY
Defrost
Defrost management has in principle the same features of the current FW: however, as the evaporator probe is
not present, defrost will be managed by counting working hours of the compressor and will end for timeout.
A programmed defrost will be done every defined number (parameter dF0) of working hours.
In addition, the algorithm will count the number of openings of the door as well. The aim is to anticipate of a
number of minutes (dF2) the programmed defrost with reference to the total number of openings of the door.
Every time the programmed defrost is done, the total on-time hours of compressor and the number of door
openings will be reset. Proper parameters will be employed in order to manage this algorithm.
In order to do this, consider flux diagram of Figure 3.4. For instance, t_on_cmpr is the variable counting on-time
hours of compressor starting from last defrost, whereas n_open_door is the number of openings of the door.
t_on_cmpr is reset after each defrost, while n_open_door is reset every time it reaches dF1 value.
Figure 3.4: flux diagram for defrost algorithm.
START
t_on_cmpr
≥
defrost_cycle
do defrost
t_on_cmpr = 0
n_open_door = 0
END
n_open_door
≥
dF1
defrost_cycle = defrost_cycle - dF2
n_open_door = 0
?
YES
NO
NO
YES
?
defrost_cycle = dF0