Comp And Defrosting Heater Operating - Samsung SR-608EV Service Manual

8-6 Comp and defrosting heater operating

As it is seen above block diagram, 220V line is connected to the commons of Comp relay, Ry78 and
defrosting heater relay, Ry77, Ry71. When those relays are off state Comp and defrosting heater are also
off. As Comp relay moves to on and AC 220V applied to Comp load it starts operating. On the other
hand defrost heater runs if defrost heater relay moves to on. There is no chance that both Comp and
defrost heater runs together so it's useful for safety aspect.
RELAY
COMP
ON
ON
ON
ON
Samsung Electronics
Defrost H
OFF
OFF
Comp off, Defrost-Heater Off
OFF
OFF
Comp Off, Defrost-Heater Off
Load
Comp Operation
Defrost-Heater On
Remark
Defrost-Heater Power Off
Comp Power Off
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