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06.2005 R.Kurzke
599 522 797 EN
6. Electrical operation
The circuit diagram shows all the components of the dryer and their connections to the electronic board. The voltage
in the pushbutton circuits, the etectronic board, the conductimetric sensor and the NTC sensor is about 5V.
When the programme selector knob is turned, the two-pole switch (8) powers the electronic board. When the door is
opened, the drum light (3) (if featured) lights.
To start the cycle, the door microswitch (2) must be closed. When START/PAUSE is pressed, the cycle starts and
the various loads are powered.
The motor is powered via a TRIAC (TYI) which is piloted by the microprocessor. Reversal of the direction of rotation (to
unroll the washing in the drum) is controlled by a relay (RL3).
For dryers with the canister in the upper section, the pump (10) is powered by a TRIAC (TY2).
When the canister and the sump are filled with water, the float moves upwards, opening the contacts of the
microswitch (9). This causes the microprocessor to interrupt the drying cycle and to warn the user by sounding the
buzzer and lighting the CANISTER FULL pilot light.
The NTC sensor (11) measures the temperature of the air inside the appliance, while the conductimetric sensor (12)
determines the degree of humidity of the fabrics.
The microprocessor constantly monitors the correct operation of the components via a number of "sensing" lines: if a
fault occurs, the appliance goes to ALARM mode.
The DISPLAY, fitted to the control/display board (13) shows the maximum drying time, the alarms and the DELAYED
START time.
The microprocessor constantly monitors the correct operation of the components via a number of "sensing' lines.- if a
fault occurs, the appliance goes to ALARM mode.
1.
Suppressor
2.
Microswitch doorlock
3.
Drumm light
4.
Compressor motor
4.1.
Condenser compressor
5.
Drum motor
5.1.
Condenser drum motor
6.
Fan motor
6.1.
Condenser fan motor
7.
Compressor cooling fan
8.
Main switch
9.
Floater micro switch
10.
Canister filling pump
11.
NTC
12.
Brush (conductimethc sensor)
13.
Display electronic module
14.
Main electronic module
