
TROUBLESHOOTINGTROUBLESHOOTING
R Self-diagnostics check listR Self-diagnostics check list
FZ-Sensor ErrorFZ-Sensor Error
Display error : separation of sensorDisplay error : separation of sensor
housing part, contact error, disconnection,housing part, contact error, disconnection,
short circuit.short circuit.
Display error of detecting temperature ofDisplay error of detecting temperature of
sensor : more than 149℉(+65°C) or lesssensor : more than 149℉(+65°C) or less
than -58℉(-50°C)than -58℉(-50°C)
When measuring the voltage between the MainWhen measuring the voltage between the Main
PCB CN30-"4" ↔ CN76-"1", it should readPCB CN30-"4" ↔ CN76-"1", it should read
between 4.5V~1.0V.between 4.5V~1.0V.
FF-Sensor ErrorFF-Sensor Error
When measuring the voltage between the MainWhen measuring the voltage between the Main
PCB CN30-"6" ↔ CN76-"1", it should readPCB CN30-"6" ↔ CN76-"1", it should read
between 4.6V~1.0V.between 4.6V~1.0V.
FZ-DEF-SensorFZ-DEF-Sensor
The voltage of MAIN PCB CN30- “5”↔ N76-The voltage of MAIN PCB CN30- “5”↔ N76-
”1”: shall be between 4.5V~1.0V”1”: shall be between 4.5V~1.0V
FF-DEF-SensorFF-DEF-Sensor
When measuring the voltage between the MainWhen measuring the voltage between the Main
PCB CN30-"8" ↔ CN76-"1", it should readPCB CN30-"8" ↔ CN76-"1", it should read
between 4.5V~1.0V.between 4.5V~1.0V.
Ambient-SensorAmbient-Sensor
The voltage of MAIN PCB CN78- “8”↔ CN78-”The voltage of MAIN PCB CN78- “8”↔ CN78-”
12”: shall be between 4.5V~1.0V12”: shall be between 4.5V~1.0V
PANTRY-SensorPANTRY-Sensor
The voltage of MAIN PCB CN30- “9”↔ CN76-The voltage of MAIN PCB CN30- “9”↔ CN76-
” 1”: shall be between 4.5V~1.0V” 1”: shall be between 4.5V~1.0V
Ice Maker(FZ) SensorIce Maker(FZ) Sensor
Display error : separation of sensorDisplay error : separation of sensor
housing part, contact error, disconnection,housing part, contact error, disconnection,
short circuit Display error of detectingshort circuit Display error of detecting
temperature of sensor: more than 149℉temperature of sensor: more than 149℉
(+65°C) or less than -58℉(-50°C)(+65°C) or less than -58℉(-50°C)
The Voltage of MAIN PCB CN90 #8<->#9: ShallThe Voltage of MAIN PCB CN90 #8<->#9: Shall
be between 4.5v ~ 1.0vbe between 4.5v ~ 1.0v
Humidity-SensorHumidity-Sensor
Separation of sensor housing part,Separation of sensor housing part,
contact error, disconnection, short circuitcontact error, disconnection, short circuit
When measuring the voltage between the MainWhen measuring the voltage between the Main
PCB CN30-"3" ↔ CN76-"1", it should readPCB CN30-"3" ↔ CN76-"1", it should read
between 4.5V~1.0V.between 4.5V~1.0V.
Ice Maker(FF) SensorIce Maker(FF) Sensor
Display error : separation of sensorDisplay error : separation of sensor
housing part, contact error, disconnection,housing part, contact error, disconnection,
short circuit.short circuit.
Display error of detecting temperature ofDisplay error of detecting temperature of
sensor : more than 149℉(+65°C) or lesssensor : more than 149℉(+65°C) or less
than -58℉(-50°C)than -58℉(-50°C)
The voltage of MAIN PCB CN90- “1”↔ CN90-The voltage of MAIN PCB CN90- “1”↔ CN90-
”7”: shall be between 4.5V~1.0V”7”: shall be between 4.5V~1.0V
Ice Room SensorIce Room Sensor
When measuring the voltage between the MainWhen measuring the voltage between the Main
PCB CN78-"10" ↔ CN78-"12", it should readPCB CN78-"10" ↔ CN78-"12", it should read
between 4.5V~1.0V.between 4.5V~1.0V.
Display error during operation ofDisplay error during operation of
applicable fan motor : Feed back signalapplicable fan motor : Feed back signal
line contact error, motor wire separation,line contact error, motor wire separation,
The voltage of MAIN PCB CN76- “3”(Yellow) ↔The voltage of MAIN PCB CN76- “3”(Yellow) ↔
CN76-”1”(Gray): shall be between 7V~12VCN76-”1”(Gray): shall be between 7V~12V
Display error during operation ofDisplay error during operation of
applicable fan motor : Feed back signalapplicable fan motor : Feed back signal
line contact error, motor wire separation,line contact error, motor wire separation,
The voltage of MAIN PCB CN76- “4”(Orange)The voltage of MAIN PCB CN76- “4”(Orange)
↔ CN76-”1”(Gray): shall be between 7V~12V↔ CN76-”1”(Gray): shall be between 7V~12V
Display error during operation ofDisplay error during operation of
applicable fan motor : Feed back signalapplicable fan motor : Feed back signal
line contact error, motor wire separation,line contact error, motor wire separation,
The voltage of MAIN PCB CN76- “5”(Sky-blue)The voltage of MAIN PCB CN76- “5”(Sky-blue)
↔ CN76-”1”(Gray): shall be between 7V~12V↔ CN76-”1”(Gray): shall be between 7V~12V
Separation of freezer compartmentSeparation of freezer compartment
defrost heater housing part, contactdefrost heater housing part, contact
error, disconnection, short circuit orerror, disconnection, short circuit or
temperature fuse error. Display error :temperature fuse error. Display error :
the defrosting does not finish thoughthe defrosting does not finish though
freezer compartment defrost is heatingfreezer compartment defrost is heating
continuously for more than 80 minutes.continuously for more than 80 minutes.
After separating MAIN PCB CN70 wire fromAfter separating MAIN PCB CN70 wire from
PCB, resistance value between CN70 BrownPCB, resistance value between CN70 Brown
↔ CN72 Gray shall be 63(230) ohm ±↔ CN72 Gray shall be 63(230) ohm ±
7%.(Resistance value is varied by input power)7%.(Resistance value is varied by input power)
0 ohm : heater short, ∞ ohm : wire/bimetal0 ohm : heater short, ∞ ohm : wire/bimetal
open (Must power off)open (Must power off)
Separation of fresh food compartmentSeparation of fresh food compartment
defrost heater housing part, contactdefrost heater housing part, contact
error, disconnection, short circuit orerror, disconnection, short circuit or
temperature fuse error. Display error :temperature fuse error. Display error :
the defrosting does not finish thoughthe defrosting does not finish though
fresh food compartment defrost is heatingfresh food compartment defrost is heating
continuously for more than 80 minutes.continuously for more than 80 minutes.
After separating MAIN PCB CN70 wire fromAfter separating MAIN PCB CN70 wire from
PCB, resistance value between CN70 WhitePCB, resistance value between CN70 White
↔ CN70 Gray shall be 120(440) ohm± 7%.↔ CN70 Gray shall be 120(440) ohm± 7%.
(Resistanc e value is varied by input power) 0(Resistanc e value is varied by input power) 0
ohm : heater short, ∞ ohm : wire/bimetal openohm : heater short, ∞ ohm : wire/bimetal open
(Must power off)(Must power off)
Ice Maker(FZ)Ice Maker(FZ)
Function ErrorFunction Error
When the Freezer Ice Maker error occursWhen the Freezer Ice Maker error occurs
more than 3 times, the error will bemore than 3 times, the error will be
After replacing the Ice Maker, check if itAfter replacing the Ice Maker, check if it
operates normal.operates normal.