Service Manual IW 1209.0W / IWT 1259.0W
33
For internal use only
5.7 Wash water temperature control
1. Control module
2. Thermistor
3. Safety pressure switch
4. Heating element (washing)
The microprocessor sets the temperature of
the
soapy
water
needed
for
each
programme.
In the “on” position, current flows to the
heating element (4) through relay K3 via the
contacts of the safety pressure switch (3).
Temperature is regulated by the micro-
processor using an NTC thermistor (2). The
internal resistance of the thermistor drops as
its temperature increases. The drop in resis-
tance of the thermistor is sensed by the
microprocessor, which switches the heating
element out of circuit as soon as the desired
temperature is reached.
IMPORTANT
If the control unit detects a short-circuit or open-circuit in the NTC thermistor, it will skip the
heating phase.
5.7.1 NTC thermistor
1. Plastic case
2. Metal container
3. NTC resistor
4. Contacts
Resistance values relative to temperature (± 3%).
TEMPERATURE
°C
RESISTANCE
(ohms)
0
15
30
40
50
60
70
80
90
100
110
120
16325
7855
4028
2663
1801
1244
876
628
458
339
255
195
Summary of Contents for IW 1209.0W
Page 1: ...GB Integrated Washer Dryer IW 1209 0W IWT 1259 0W...
Page 3: ...GB Washing Programmes and Programme Functions VF 92J VP91J Multipanel Versions...
Page 17: ...Service Manual IW 1209 0W IWT 1259 0W 17 For internal use only 4 SPIN PROGRAMMES...
Page 18: ...18 Service Manual IW 1209 0W IWT 1259 0W For internal use only...
Page 19: ...Service Manual IW 1209 0W IWT 1259 0W 19 For internal use only...
Page 20: ...20 Service Manual IW 1209 0W IWT 1259 0W For internal use only...
Page 21: ...GB Built in Washing Machine IW 1209 0W Part B...
Page 39: ...GB Built in Washer Dryer IWT 1259 0 W Part C...
Page 68: ...68 Service Manual IW 1209 0W IWT 1259 0W For internal use only...
Page 69: ...GB Fault Indicator and Test Programmes Electronic Washing Machines Multipanel Version...
Page 80: ...80 Service Manual IW 1209 0W IWT 1259 0W For internal use only Spin phase 12...