102
Function
Electric heating
The three heating elements in the machine are
connected to separate phases and are swit-
ched on and using one or two heating contac-
tors, K.21 and K22 (two contactors are used for
higher heating power). The heating contactors
are controlled by the programme unit A1, output
(X36:7).
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 pro-
gramme unit prevents switch-on of the heating
elements. If an error would nevertheless cause
the elements to switch on, a slow-blow fuse trig-
gers to switch them off again. Then the heating
elements has to be changed.
Steam heating
The steam valve is controlled by the programme
unit A1, output (X3 36:7).
Heating
2
3
2
6665
2
1
4
3
K21
6664
K21
K22
2
1
4
3
5
5
1. Heating elements
2. Programme unit A1
3. Voltage supply
4. Temperature sensor
5. I/O-card
1
2
5
4
3
Y51
3
6666
1. Steam valve
2. Programme unit A1
3. Rear control unit
4. Temperature sensor
5. I/O-card
Summary of Contents for EX618
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