51
TROUBLESHOOTING
※
Self-diagnostics check list
LED
Item
Trouble contents
Diagnostic method
F
R
or
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°F(+65°C) or less
than -58°F(-50°C)
When measuring the voltage between the Main
PCB CN30 3PIN - 7PIN, it should read between
4.5V~1.0V.
R-Sensor Error
When measuring the voltage between the Main
PCB CN30 5PIN - 7PIN, it should read between
4.6V~1.0V.
F-DEF-Sensor Error
The voltage of MAIN PCB CN30 4PIN - 7PIN
shall be between 4.5V~1.0V
Ambient-Sensor Error
The voltage of MAIN PCB CN30 11PIN - 7PIN
shall be between 4.5V~1.0V
Ice Maker Sensor
Error
Display error : separation of sensor
housing part, contact error, disconnection,
short circuit Display error of detecting
temperature of sensor: more than 149°F
(+65°C) or less than -58°F(-50°C)
The Voltage of MAIN PCB CN90 3PIN - 9PIN
Shall be between 4.5v ~ 1.0v
Humidity-Sensor Error
Separation of sensor housing part, contact
error, disconnection, short circuit
When measuring the voltage between the
Main PCB CN30 12PIN - 7PIN, it should read
between 4.5V~1.0V.
F-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 CN74 4PIN - 1PIN
shall be between 7V~12V
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 CN74 2PIN - 1PIN
shall be between 7V~12V
F-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 100 minutes.
After separating Main PCB CN70& SMPS CN01
wire from PCB, Resistance value between CN70
9PIN – SMPS CN01 3PIN 7%.(Resistance value
is varied by input power) 0 ohm : heater short, ∞
ohm : wire/bimetal open (Must power off)
Ice Maker 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.
Damper-Heater Error
Display error when open error is detected
by damper heater : separation of Damper
Heater housing part, contact error,
disconnection, short circuit.
After separating MAIN PCB CN75 wire from
PCB, resistance value between CN74 1PIN -
2PIN wire shall be 135 ohm± 7%.
0 ohm : heater short, ∞ Ohm : wire / bimetal
Open.
Panel
↔
Main
Communication Error
Display pc - Er in the panel with alarm :
MICOM MAIN
¥
PANEL communication
error.
Actually, If there is not a problem, it is desirable
to replace Main and Panel PCB With the
oscilloscope after a cable problem confirming.
Main - Inverter
Communication Error
Display 44Er in the panel :
Inverter MICOM
¥
Main MICOM
communication error.
Actually, If there is not a problem, it is desirable
to replace Main and Inverter PCB With the
oscilloscope after a cable problem confirming.
