Air Circulation Motors M4 And M5; Temperature Sensors B20, B21 And B22; Temperature Safety Sensors B3 - Electrolux IC44832 LF Service Manual

5
electrical heating with air circulation
Operation
heating elements :
Powered on and off by the KM6, KM7, and KM8 contactors, the heating elements are used to
heat the ironing cylinder.
Contactors KM6, KM7, KM8, KM9 and KM10 :
Controlled by the A2 ironer interconnection board (J20-3), the KM6, KM7, and KM8 contactors
power on and off the heating elements.
Controlled by the A2 ironer interconnection board (J20-4 and J20-5), the KM9 and KM10
contactors power on and off the rotating heat motors.

air circulation motors M4 and M5 :

Protected by circuit breaker Q2 and controlled by the KM9 and KM10 contactors, the M4
(left side) and M5 (right side) motors used to create rotating heat in the ironing cylinder. They
operate independently and must not be swapped, i.e. left motor M4 is controlled by KM9 and
right motor M5 is controlled by KM10.
Start-up condition :
Motor M4 (left side)
Motor M5 (right side)

Temperature sensors B20, B21 and B22 :

Connected to A1 control display (X2), the three temperature sensors B20 (left sensor),
B21 (centre sensor) and B22 (right sensor) are used by A1 control display to regulate the
temperature of the ironing cylinder.
Overheating condition :
Overheating on side
Overheating on center = 1

Temperature safety sensors B3 :

Connected to A1 control display (X11-4 and X11-5), safety sensor B3 is used by A1 control
display to stop the machine's heating when the temperature of the ironing cylinder exceeds
240°C.
4
= 1 if B20 > B21
= 0 if B20 < B21
= 1 if B22 > B21
= 0 if B22 < B21
= 1 when
= 0 when
when
= 0 when
B20 >225°c or B22 > 225°c
B20 & B22 < 195°c
B21 > 244°c
B21 < 244°c
Service
Manual
04106016/GB
43-09