98
2
6665
2
1
4
3
K21
6664
K21
K22
2
1
4
3
5
5
Heating
Function
Electricheatingwithfusiblecut-outonelement
The three heating elements in the machine are
connected to separate phases and are switched
onandoffusingoneortwoheatingcontactorrs,
K21ochK22(twocontactorsareusedforhigher
heatingpower).Theheatingcontactorsarecon-
trolledbytheprogrammeunitA1,output(X36:7).
Theprogrammeunitreceivesinformationonthe
water temperature in the machine through an
analoguesignalfromthetemperaturesensor
situated in the outer drum. The programme unit
controls the heating contactors to achieve the
setwatertemperatureforthecurrentwashing
programme.
When there is no water in the drum, the pro-
grammeunitpreventsswitch-onoftheheating
elements.Ifanerrorwouldneverthelesscause
theelementstoswitchon,aslow-blowfusetrig-
gerstoswitchthemoffagain.Thentheheating
elements has to be changed.
1. Heatingelements
2. ProgrammeunitA1
3. Voltagesupply
4. Temperaturesensor
5. I/O-card
2