AEG Electrolux ENB 35400 X, Руководство по обслуживанию

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- ITZAA 28/44 599 38 47-44
6.3 Defrosting
All the humidity in the compartment accumulates on the evaporator, which is the coldest part of the compart-
ment; periodically, about every 14 hours with normal door opening (up to 72 hours if the doors never open!), it
is then necessary to defrost the ice on the battery.
The defrosting starts after the compressor cut-out or if the compressor is on after 2,5 hours max.
The electronic board immediately disconnects the circuit which powers the compressor (3) after 2 minutes the
fan (24), waits 3 minutes and then it powers the circuit of the defrosting heater (9) for a minimum time of about
20 minutes.
The heat generated by the defrosting heater does not affect the freezer compartment temperature or the food
packages temperature, because the thermal energy is consumed in the defrosting process of the evaporator
ice.
After 20 minutes, the electronic board checks the state of the thermal switch (27) every minute to detect the
cut-out.
When the defrosting switch cuts-out, and anyway after 20 minutes, the electronic board switches the compres-
sor on (3) with a 5 minute delay.
After 3 minute delay, when the air is already cold, the fan switches on too (24).
If for any reason, the defrosting cut-out switch (27) does not switch on and the battery temperature rises up to
40 °C, the defrosting heater (9) will be switched off by the safety thermal switch (26).
If 1 hour after the starting of the defrosting, the thermal switches did not cut out, the electronic board switches
the defrosting heater off and continues its operation.
The arrows in the picture indicate the current path.