3.4.4
Control of pressure switches closure
The check of position of pressure switch contacts (empty or full) is
detected by the electronic board (14) by means of two "sensing"
lines:
st
§
L1: 1
level (5) pressure switch check
nd
§
L2: 2
level (6) pressure switch check
3.4.5
Control of washing temperature
The temperature control is carried out by the electronic control via a NTC sensor.
The NTC (16) sensor is connected directly to the timer electronic control (14) to
contacts M9.2-M9.3.
If NTC sensor is in short-circuit or interrupted the heating phase is skipped.
NTC temperature sensor
1. Plastic casing
2. NTC Resistance
3. Terminals
3.4.6
Heating element
The heating element (12) is powered in the following way:
§
closure of timer contact G6.3-G6.4
§
first level pressure switch (5) closed on full
§
safety pressure switch (13) closed on full
2001.08 eb
Temperature
Resistance
(ºC)
± 10% (Ω )
30
40
50
60
70
78
85
24
17300
11500
7840
5460
3900
2970
2320
599 34 85-05