arcelik BEKO COSMOS, Service Handbook, Page: 35 / 274

SBS COSMOS REFRIGERATOR
07.11.2018 / REV NO: 01
35
Sensitivity: Public
Condenser fan motor:
It is located at the bottom of the cabin. It prevents excessive heating
of the condenser and drops condensation pressure to increase the efficiency of the fridge. It
runs when the compressor starts and stops when it stops.
Sensors:
Its resistance decreases as the temperature rises. Sensors on the refrigerator body
detect the temperature of their surrounding area and transmit this to the electronic control
board.
Freezer sensor (Freezer Compartment Sensor):
It detects the temperature in the freezer
compartment and transmits this to the microprocessor. Values taken from this sensor are
compared with the cut-in and cut-out values of the temperature set for the freezer
compartment to run or stop the compressor and the freezer compartment fan motor.
FF sensor (Fridge Compartment Sensor):
It detects the temperature in the fridge
compartment and transmits this to the microprocessor. Values taken from this sensor are
compared with the cut-in and cut-out values of the temperature set for the fridge compartment
to run or stop the compressor, the fridge compartment fan motor and the fridge compartment
rear wall heater.
FF Eva sensor (Fridge Compartment Eva Sensor):
It is used to detect the tail Evaporator
temperature of the Fridge compartment
Defrost sensor:
It is located on the evaporator at the capillary outlet. It detects the
temperature on the evaporator and transmits this to the microprocessor. Defrost is terminated
according to the temperatures received from this sensor.
Freezer defrost heater:
The heater under the freezer evaporator is activated and
deactivated by the electronic card at times of defrost. Thus, it periodically defrosts icing
accumulated on the evaporator.
Flange Heater:
It is used to prevent perspiration on the contact surface of Freezer Door
seals.
Thermal fuse:
It is located on the evaporator. It cuts the current to the heater to deactivate
the defrost heater in order to prevent the defrost heater remain activated continuously and
cause damage on the refrigerator, environment and foods inside. Thermal fuse is disposable
and therefore it must be replaced once it is blown.
PTC relay:
Its resistance increases as the temperature rises. It ensures primary startup of
the compressor by activating the compressor's auxiliary coil, then it deactivates the auxiliary
coil by being heated with the current flowing over it.
Thermic:
It is a component that opens the circuit when heated. It opens the circuit at a
certain temperature and cuts the current to the compressor in order to protect the compressor
coils against excessive heating. When the temperature of the compressor drops below a
certain value, it re-completes the circuit to operate the compressor.
Door reed switch:
FRZ door reed switch is located on the FRZ door hinge cover, and FF
door reed switch is located on the FF door hinge cover. FRZ switch is normally closed circuit.
When the FRZ door is opened, it is open-circuited and a signal goes to the board. Thus, FRZ
lamp illuminates and the fan stops if it is running. If necessary, it runs again when the door is
closed. FF switch is also normally closed circuit. When the FF door is opened, it is open-
circuited and a signal goes to the board. Thus, FF lamp illuminates and the fan stops if it is
running. When the door is closed, lamps turns off and the fan starts running if necessary.