Level Control During Washing; Control Of Wash Pump; Heating - Electrolux DIVA 60 cm Service Manual

7.5 Level control during washing

When the fill phase is complete, the appliance shifts to the washing phase. During this phase, which
is executed with cold or heated water, the status of the pressure switch is monitored constantly to ensure
that the water system is operating efficiently, and the water level is topped up if necessary.
If the pressure switch returns to EMPTY during washing, the fill solenoid is activated for a maximum
time of S.T. x 3 (maximum total fill time).
If this time is exceeded, the washing cycle is completed but no more water is introduced. When this
occurs, an alarm [F0] is stored internally but is not shown to the user. The alarm can only be displayed to
the service technician through a specific procedure.
7.5.1

Control of wash pump

The wash pump (PL) is powered by the triac on the main board (connector F5-F7), through the door
interlock switch (IP) and the start button (PU).
The main board controls the speed of the pump motor using the signal from the tachometric
generator (T), which is connected across connectors G1-G2.
This signal is used for:
Controlling washing systems «ctrl» and «PW»
Controlling the safety systems on the pump motor, and the relative alarms
Controlling dynamic filling

7.6 Heating

The heating element, which is enclosed in a tube, is used to heat the wash water (it does not operate
during drying). The element is installed on the intake to the wash pump and is connected to the tube that
feeds the upper spray arm.
The heating element (RR) is connected to relay on the main board (connector E2), the start button
(PU), and the pressure switch controlling the fill system (RL), which must be set to FULL (contacts 1-3
closed).
Two safety thermostats are installed on the heating element:
one thermostat resets automatically (and trips at 98ºC)
-
the other is a fuse (that opens at 206ºC)
-
The temperature of the water is controlled by the main board using the signal from an NTC sensor
(ST) connected to connectors H7-H8.
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