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TROUBLESHOOTING
LED Item Trouble contents Diagnostic method
F3 FZ-DEF-Sensor Error
Display error : separation of
sensor housing part, contact
error, disconnection, short
circuit.
Display error of detecting
temperature of sensor : more
than 149℉(+65°C) or less than
-58℉(-50°C)
The voltage of MAIN PCB CN30- “5”↔
N76-”1”:shall be between 4.5V~
F4
FZ-FAN Error
Display error during operation
of applicable fan motor : Feed
back signal line contact error,
motor wire separation, motor
error
The voltage of MAIN PCB CN76- “3”
(Yellow) ↔CN76-”1”(Gray): shall be
between 7V~12V
F5
C-FAN Error
Display error during operation
of applicable fan motor : Feed
back signal line contact error,
motor wire separation, motor
error
The voltage of MAIN PCB CN76- “5”
(Sky-blue) ↔ CN76-”1”(Gray): shall be
between 7V~12V
F6
Humidity-Sensor Error
Separation of sensor
housing part, contact error,
disconnection, short circuit
When measuring the voltage between
the Main PCB CN30-"3" ↔ CN76-"1", it
should read between 4.5V~1.0V.
F7
FZ-DEF Error
Separation of freezer
compartment defrost heater
housing part, contact error,
disconnection, short circuit
or temperature fuse error.
Display error : the defrosting
does not finish though freezer
compartment defrost is
heating continuously for more
than 80 minutes.
After separating MAIN PCB CN70 wire
from PCB, resistance value between
CN70 Brown ↔ CN70 Gray shall be
63(230) ohm ± 7%.(Resistance value is
varied by input power)
0 ohm : heater short, ∞ ohm : wire/
bimetal open (Must power off)