LG LFX25992 series, Service Manual

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6. TROUBLESHOOTING
6-1 Error Code Summary
WARNING: When checking Resistance values, make sure to
turn off the power, and wait for the voltage to
discharge.
NOTE) Within 3 hours after the error : Press the Ice Plus button and Freezer button simultaneously
3 hours after the error : All errors, except for "Er rt", "Er SS",
"Er IS(except for Icing sensor)", "Er gF", "Er It" error, are displayed.
"Er IS" which is displayed without input of user is the error of Icing Sensor.
FRESH AIR FIL TER
NO
Error Detection
Category
1 Normal None 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 at it’s
connector.
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
Error Generation Factors
Remark
Error Display
4
Icing Sensor
Error
Er IS
Short or disconnection of
the sensor about Ice maker
(Icing sensor, Ice maker
sensor)
5
Pantry sensor
error
Er SS
Short or Disconnection
of Pantry Sensor
9
Ice maker kit
defect
Er It
Other Electric system error
such as moter, 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
7 F dH
Even though it is passed
80Minute since then
Defrosting, if Defrosting
sensor is not over 40°F(5°C),
it is caused
Even though it is passed
50Minute since then
Defrosting, if Defrosting
sensor is not over 40°F(5°C),
it is caused
8
Refrigerator
Defrosting Error
r dH
10
Flow
Meter(Sensor)
Defect
Er gF
Error of flow meter or water
input or low water pressure
Error of flow meter or water
input or low water pressure or
flow meter connection
11
Poor Defrosting
Er dH
Even though it is passed
1 hour since then Defrosting,
if Defrosting sensor is not
over 46°F(8°C), it is caused
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
13
Abnormality of
BLDC FAN Moter
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
Poor BLDC Motor connection,
DRIVE IC, and TR
14
Abnormality of
BLDC FAN Moter
for Refrigerator
Er CO
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
16
Communication
Error
Er
CO
Communication Error
between Micom of Main PCB
and Display Micom
Poor Communication
connection,Poor TR of
Transmitter and Receiver Tx/Rx
between display and main board.
Poor BLDC Motor connection,
DRIVE IC, and TR
15
Abnormality of
BLDC FAN Moter
for Mechanic
Room
Er CO
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
6
Room Temp
Sensor Error
Er rt
Short or Disconnectoin of
Room temp.sensor
12
Abnormality of
BLDC FAN Moter
for Ice Making
Er IF
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
Poor BLDC Motor connection,
DRIVE IC, and TR
Freezer
Temperature
(Error code )
Refrigerator
Temperature
(Error code )