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Defrost Algorithm - Electrolux Premium Quick Reference Manual

Thermoregulator management controller
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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.
NO
defrost_cycle = defrost_cycle - dF2
n_open_door = 0
From ser. no.:
?
n_open_door
dF1
YES
Figure 3.4: flux diagram for defrost algorithm.
Page:11
START
defrost_cycle = dF0
?
t_on_cmpr
NO
defrost_cycle
YES
do defrost
t_on_cmpr = 0
n_open_door = 0
END
Ed.1" 08-2014
560001 EG
Doc. No:

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