Built-In Detergent Dispenser; Draining; Siphon" Effect - Electrolux Talkie Service Manual

7.7 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 the triac (connector A3-A5) 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 C3-C1 on the output main board.
If there is no rinse-aid, the reed contact is closed and the relative LED (on the interface board) lights
up.

7.8 Draining

The drain pump (PS) is powered by the triac (connector B5-F7) through the contacts on the start
button (PU) and the door switch (IP).
At the end of the drain phase, a check is made to verify whether the contact on the pressure switch
is open (in the EMPTY position). If it is open, the cycle is allowed to move on to the next phase.
If malfunctions in the drain system keep the pressure switch stuck on FULL (presence of water in the
water circuit), the drain phase is repeated.
After the drain phase is repeated, the electronic control system again checks the status of the
pressure switch. If it is still on FULL, a drain failure alarm [i20] is signalled. The timeout for each of the two
drain phases is 120 seconds.
Note: Wash programmes always begin with a drain phase.
7.8.1

"Siphon" effect

If the drain tube is incorrectly positioned, the so-called "siphon effect" may occur, in which case an
alarm is displayed iF0 (see 9.1).
The problem is particularly likely to occur during execution of the "declaration cycle": although the
drain pump shuts down at the end of a drain phase, water continues to be expelled from the machine
because the drain tube is incorrectly positioned. When this occurs, water loaded by the fill solenoid during
the next fill phase is directly expelled, so the "full" contact on the pressure switch does not close before its
"time out".
Thus, if alarm iF0 occurs, it is a good idea to make sure the drain tube is correctly positioned as
shown in the instruction manual
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