– 80 –
LED
Item
Trouble Contents
Diagnostic Method
F-1-
Ice Room Sensor Error Display error: sensor housing
separation, contact error,
disconnection, short circuit
Display error by detecting
temperature of sensor: more than
149°F (+65°C) or less than -58°F (-50°C)
Check the voltage of MAIN PCB
CN32 #3 to CN75 #1. It should
be between 4.5V to 1.0V.
F-1-
Freezer Defrost Error
Display error: separation of freezer
compartment defrost heater housing
part, contact error, disconnection,
short circuit, or temperature fuse error
Display error: The defrosting does
not
fi
nish through fresh food
compartment. Compartment defrost is
heating continuously for more than 70
minutes.
After separating MAIN PCB
CN70 and CN71 from PCB,
check the resistant value
between CN70 brown to CN71
orange. It should be 102 ohms
±7%. (Resistance value is varied
by the input power.) Check 0
ohm: heater short,
∞
ohm: wire/
bimetal open.
F-10-
Ice Room Fan Error
Display error during operation of fan
motor: feedback signal line contact
error, motor wire separation, motor
error
Voltage of MAIN PCB CN76
black to CN75 gray should be
between 6V to 12V.
R-10-
Pantry 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
CN91 from PCB, check the
resistant value between black
to brown wire. It should be
145 ohms ±7%. Check 0 ohm:
heater short,
∞
ohm: wire/
bimetal open.
R-10-
Pantry Sensor Error
Display error: separation of sensor
housing, contact error, disconnection,
short circuit
Display error by detecting
temperature of sensor: more than
149°F (+65°C) or less than -58°F (-50°C)
Check the voltage of MAIN PCB
CN30 #8 to #9. It should be
between 4.5V to 1.0V.
R-10-
Water Tank Heater
Error
Display error when open error is
detected by water tank heater:
separation of water tank heater
housing part, contact error,
disconnection, short circuit
After separating MAIN PCB
CN78 from PCB, check the
resistant value between black
to brown wire. It should be
45 ohms ±7%. Check 0 ohm:
heater short,
∞
ohm: wire/
bimetal open.
F-10-
Panel to Main
Communication Error
Display of Pc/Lc Er in the panel with
alarm:
MICOM MAIN to LOAD communication
error
MICOM MAIN to PANEL communication
error
It is desirable to recheck the
condition with the oscilloscope
after replacing Main and Panel
PCBs
F-10-
Load to Main
Communication Error
f
g
b
a
b
g
g
f
