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－39－
N
Y
Connection failure
N
Y
Change sensor
Is defrosting sensor O.K.
Is conection of defrosting
sensor O.K
N
Y
connection failure
In MAIN-PCB connection
(con30) O.K?
N
Y
Wire open
Is input vltg of CON30
PIN4 O,K
Change MAIN PCB ASS’Y
START
Freezer’s defrosting sensor failure