arcelik Beko B13, Service Handbook

Page: 49 / 111

B13 B7S B7SLED WASHING MACHINE SERVICE HAND BOOK
49
8.2. Safety Switch (Door Lock)
Picture 8.2 Safety switch
PTC door safety lock was used. When any wash program is started after the door is
closed, PTC disk is heated and the door is locked and it is prevented to be opened
when the program is in progress.
After the program finishes, PTC cools down in 70s and the door is unlocked.
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.
8.3. 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
220-240V 50-60Hz
Current 6A max (washing) / 3A (spinning)
Input Power 300 / 450 W
Starting Current 5...8A (washing) / 10A max (spinning)
Technical specifications of tachogenerator
Number of double pole
8
Tacho output voltage at 300 rpm >0.9 V
Tacho output voltage at 16500 rpm
<45 V
Rated Operating Voltage : 250V 50-60Hz
Operating Current
: 10-50 mA
PTC Resistance : Min. >=50 ohm
Contact Locking time : <=8s
Contact Engaging time : 35...70s
Operating Temperatures : T85