Function; Electric Heating; Steam Heating - Electrolux W365H Service Manual

40

Function

Electric heating

The three heating elements in the machine are
Fig.
2 connected to separate phases and are switched
on and off using one or two heating contactors,
K.21 and K22 (two contactors are used for higher
heating power). The heating contactors are
controlled by the programme unit A1 via output
X8:1 on I/O card 1 A11. The control signal is fed
via the communication card A21.
The programme unit receives information on the
water temperature in the machine through an
analogue signal from the temperature sensor
situated in the outer drum. The programme unit
controls the heating contactors to achieve the set
water temperature for the current washing
programme.
When there is no water in the drum, the
programme unit prevents switch-on of the
heating elements. If an error would nevertheless
cause the elements to switch on, a slow-blow
fuse triggers to switch them off again.Then the
heating element has to be changed.

Steam heating

Fig.
The steam valve is controlled by the programme
3
unit A1, output (X3 36:7). The control signal
travels via the communication card A21.
4
40. Heating
2
Voltage supply
K22
Voltage supply
3
Heating
Programme
elements
unit Al
Card
A21
K21
Temperature
sensor
Heating
Programme
elements
unit A1
Card
A21
K21
Temperature
sensor
Programme
unit A1
Steam
valve
Card
Y51
A21
Rear control unit
Temperature sensor
Service
Manual
5205
5202
5208
438 9150-41/03
04.03