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11-3. Defrost failure
1. In case of the defrost inferior, it runs normally at the initial power on. But the freezing and cooling
inferior occurs after some times and at the time of defrost. This is a abnormality of defrost system. Refer
to the followings.
Condition for decision
Is the freezer defrost sensor
normal by self diagnosis?
Start
Corresponding sensor change/repair
Is the freezer defrost heater normal?
Check the temperature fuse, heater
self break, cord contact
Is the temperature of defrost
sensor below -5℃?
Forced start for a some times
Repair the connection terminal
Perform the forced defrost
After heating some period check heater off.
Is the defrost heater run?
Is the cord connection terminal of
main PCB part normal?
Exchange/repair the defrost relay
Exchange the main PCB
Is the defrost relay normal?
N
N
Y
Y
N
Y
N
N
N
Y
Y
Y
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