6.9 Heating
The heating element is enclosed in a
protective tube, and is used to heat the washing
water (but does not switch on during the drying
phase). The heating element is fitted to the
outlet of the washing pump and connected to
the duct which feeds the upper spray arm.
The heating element (RR) is powered by
relay RL1 on the circuit board (connector A1),
by the ON/OFF switch (PU) and by the level
pressure switch (RL), which must be set to
"FULL" (contact closed on 1-3).
Two safety thermostats are fitted to the
heating element:
an
automatic-reset
-
intervenes at 98°C
a thermostat with a thermal fuse (206°C).
-
The temperature of the water is controlled
by the main circuit board via an NTC sensor
(ST) which is connected to connectors G5-G6.
6.10 Integrated detergent dispenser
The detergent dispenser is a plastic container consisting of two separate
sections. The first (A) contains the detergent; the second (B) contains the Rinse-
aid.
The dispenser is of the single-coil type, and uses a single electrical coil,
connected to a mechanical system, for both functions.
When the coil is energized, it actions the mechanism via a series of
levers to introduce detergent in a determined sequence (first detergent, then
rinse-aid).
The coil of the detergent dispenser
(DD) is powered by the circuit board via triac
TY5 (connector D7) at certain points during the
cycle, thus ensuring correct dosage.
The circuit is closed by the contacts of
the ON/OFF switch (PU) and the door switch
(IP).
Some models feature a rinse-aid sensor whose
reed contact (SB) is connected to connectors
F3-F4 on the circuit board.
The absence of rinse-aid causes the
contact to close, which lights the corresponding
LED (on the display board).
SOI/TD PR
thermostat
which
19
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B
A
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