Motor; Heater; Picture 9.2. Motor - Beko B7S-B7SLED Service Handbook

Current of all components passes over the door safety lock. Machine will not work in case it
is faulty.
When 220V is supplied between the contacts numbered 3 and 1, the distance between the
contacts numbered 3 and 2 should switch to closed position.

8.5. Motor

Universal series motor is used. Universal series motor consists of stator and rotor. Stator and
rotor windings are connected in series by means of collector and brush and current is
transmitted to the rotor windings. Motor speed control is made over electronic card. Motor
triac on the card adjusts the motor/drum speed by changing the triac triggering angle
according to the signal coming from the tacho. In case of abnormal situations (continuous
operation-locked rotor), thermocouple is available on the motor winding to protect the
winding from overheating.
Rated Operating Voltage
Current
Input Power
Starting Current
Technical specifications of tachogenerator
Number of double pole
Tacho output voltage at 300 rpm
Tacho output voltage at 16500 rpm

Picture 9.2. Motor

8.6.

Heater

It is used to heat the water inside the drum.
Since it is an electronically controlled machine, there is a double thermocouple at each of the
heater inlets.
When the heater operates dry, the overheated thermocouple open circuits the heater. Open
circuited heater cannot be used again. In order to prevent the heater to operate without
water "during heating", heater safety water level is defined to the microprocessor (Psafety).
When the water level which is measured by the water level sensor comes under the defined
Psafety level, heater is disabled.
When the water temperature which is read by NTC reaches to the "selected temperature",
heater is disabled by the microprocessor.
B7S B7SLED WASHING MACHINE SERVICE HAND BOOK
220-240V 50-60Hz
6A max (washing) / 3A (spinning)
300 / 450 W
5...8A (washing) / 10A max (spinning)
8
>0.9 V
<45 V
45