44
TROUBLESHOOTING
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Self-diagnostics check list
LED Item Trouble contents Diagnostic method
R1
Ice Maker(F) 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 CN90 #8
<->#9: Shall be between 4.5v ~ 1.0v
R3
Compressor
Error
Comp starting
Failure Error
When the Compressor fails
starting
Check if there is a short between
compressor terminals.
Check if there is a short between IPM
Pins.
Check the Compressor and the Cycle
Turn Off the Ref. , after 5minutes, Turn
on the Ref.
IPM Fanlt Error
When there is a IPM Fault
error
Comp Abnormal
current Detection
Error
When there is abnormal
current detected at the
Compressor
Check the Compressor connections
Check the Compressor and the Cycle
Turn Off the Ref. , after 5minutes, Turn
on the Ref.
Motor Locked
Over RPM Error
When there is a Compressor
restriction error
Check the condition of R1[Shunt
Resistance]
Check the Compressor and the Cycle
Turn Off the Ref. , after 5minutes, Turn
on the Ref.
Comp under
voltage Error
When there is a low voltage
error
Check the input Voltage
Turn Off the Ref. , after 5minutes, Turn
on the Ref.
Comp over
voltage Eroor
When there is a over voltage
Check the input Voltage
Turn Off the Ref. , after 5minutes, Turn
on the Ref.
R4
FF-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)
When measuring the voltage between
the Main PCB CN30-”6" ↔ CN76-"1", it
should read between 4.5V~1.0V.
R6
FZ-Ice Pipe Heater Error
The error occurs when there
is a wire connector slip-out of
the Water Supply Pipe Heater,
a contact error or a breakage
in the wiring.
When measuring the resistance of the
Main PCB CN79 Yellow-Pink wires, it
should be within 102Ω ±7%.
0Ω : heater short, ∞Ω : Check for Wire
Open or Connector Slip-out
R7
Ice Maker(FZ)Function Error
When the Freezer Ice Maker
error occurs more than
3 times, the error will be
displayed.
After replacing the Ice Maker, check if it
operates normal.
F1
Ambient-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 CN78-
“8”↔ CN78-”12”: shall be between
4.5V~1.0V
F2
FZ-Sensor Error
When measuring the voltage between
the Main PCB CN30-"4" ↔ CN76-"1", it
should read between 4.5V~1.0V.