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
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 elements have to be exchanged.

Steam heating

The steam valve is controlled by programme unit
Fig.
A1 via output X8:1 on I/O card 1 A11. The control
3
signal is fed via the communication card A21.
4
40. Heating
2
Voltage supply
K22
Voltage supply
3
Rear control unit
Heating
Programme
element
unit Al
I/O card 1 A11
Card
A21
K21
Temperature sensor
Programme
unit A1
Heating
element
I/O card 1 A11
Card
A21
K21
Temperature sensor
Programme
unit A1
Steam
valve
I/O card 1 A11
Card
A21
Temperature sensor
Service
Manual
5270, 5271
5272
438 9146-41/03
03.20