Beko B7S-B7SLED, Service Handbook

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B7S B7SLED WASHING MACHINE SERVICE HAND BOOK
44
8. . COMPONENTS
8.1. Mechanical Parts

All drums are made of a special plastic which is made of high-resistant plastic and
reduces the level of the sound strength and does not have a oxidation problem. Drum
cover which is used in the YOC series machines is also made of plastic and attached
to the drum with special clips. There is one concrete counterweight each for upper and
lower part of the drum. Motors are connected and screwed with two rubber bushing
and bolts in the YOC series machines. There are transport safety bolts at the rear of
the drum. Drum group is hung onto the body from the sides with two springs and fixed
to the underside of the body with the two horizontal friction shock absorbers. Drum is
made of stainless steel.
8.2. Shock Absorber System

Body is hung onto the body with 2 springs. Also the drum is fixed to the body from its
underside with 2 friction shock absorbers. Springs and shock absorbers transmit
vibrations which are created inside the drum to the body and prevent the machine to
move and operate with noise. Shock absorbers are connected to the chassis and the
drum with the plastic pins instead of bolts.
8.3. Electronic Control and Visual Card

By means of the control and visual card which is designed to have a single face and
manufactured by ARÇELİK; the wash programs which are written onto the
microprocessor, washing and spinning motor profiles, protection algorithms and
components (motor, heater, pump, valves, door safety lock, ntc, water level selection
switch, spinning/temperature selection potentiometer) are controlled.

There are feeding circuit on the front face of the card (smps), motor and other
component control circuits -triac and relays - and component connection terminals and
on its rear face there are microprocessor, function and time delay button and LEDs
and program tracking LEDs.

Necessary wash program is operated in line with the information read from the
program selection switch which is connected to the card (rotary switch),
spinning/temperature setting potentiometer, auxiliary function and Time Delay
switches.

From the card, auxiliary function, speed/temperature and time delay options and
functions can be selected.
8.4. Safety Switch (Door Lock)
Picture 8.1 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.
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