LG LFC25776SB, Service Manual

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6. TROUBLESHOOTING
6-1 Error Code Summary
NO
Error Detection
Category
1 Normal operation of Display
2
Freezer Sensor
Error
Er FS
Short or Disconnection
of Freezer Sensor
3
Refrigerator
Sensor Error
Er rS
Short or Disconnection
of Refrigerator Sensor Check each sensor and its
connector.
Error Generation Factors Remark
WARNING: When you check the Resistance values, be sure to turn off the power.
And wait for the voltage-discharge sufficiently.
Error Display
Freezer
Temperature
Ref.
Temperature
4
Defrosting
Sensor Error
Er dS
Short or Disconnection
of Defrosting Sensor
5
Icing Sensor
Error
Er IS
Short or Disconnection
of Icing Sensor
6
Poor Defrosting Er dH
Even though it is passed
1 hour since then Defrosting,
if Defrosting sensor is not
over 8°C, it is caused
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
7
Abnormality of
BLDC FAN Motor
for Freezer
Er FF
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
Poor BLDC Motor
connection, DRIVE IC,
and TR
8
Abnormality of
BLDC FAN Motor
for Mechanic
Room
Er CF
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
Poor BLDC Motor
connection, DRIVE IC,
and TR
9
10
11
12
Communication
Error
Er
Er
Er
CO
Communication Error
between Micom of Main
PWB and Display Micom
Poor Communication
connection,Poor TR of
Transmitter and Receiver
NOTE
) 3 hours before the error : Press the Ice Plus button and Freezer button simultaneously
3 hours after the error : All errors, except for “Er rt”, “Er HS”,“Er IS”, “Er It” error, are displayed.
Normality
None
Humidity
Sensor Error
HS
rt
Er rt
Short or Disconnection
Of Humidity
Short or Disconnection
of Room temp. sensor
Check Each sensor and its
Connector
Check Each sensor and its
Connector
Room Temp
Sensor Error
Ice maker kit
defect
Other Electric system error
such as mother,gear,Hall IC,
operation circuit within I/M kit
When the ice does not drop
even when the I/M Test S/W
is pressed
(same as model applied
Twisting Ice Maker before)