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5.9 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 RL1 on the main board (connector A1),
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 G5-G6.
5.9.1
Built-in detergent dispenser
This dispenser consists of a plastic container divided into two separate
compartments which contain detergent (A) and rinse-aid (B).
It is engaged by a single coil connected to a mechanical system that
actuates both functions.
When the coil is activated, it moves a set of levers that engage the
mechanism, which first delivers the detergent and then delivers the rinse-aid.
The dispenser coil (DD) is powered by
the main circuit board through triac TY5
(connector D7) at the proper points in the cycle.
The circuit is closed through the
contacts in the start button (PU) and the door
switch (IP).
Some models are equipped with a
rinse-aid sensor with a reed contact (SB)
connected to connectors F3-F4 on the main
board.
If there is no rinse-aid, the reed contact
is closed and the relative LED (on the display
board) lights up.
SOI/TD - PR
25
B
A
599 35 94-03
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