LG LFX25973 Series, Service Manual

Page: 19 / 85

- 19 -
6. TROUBLESHOOTING
6-1 ERROR CODE SUMMARY
WARNING: When you check the Resistance values,
be sure to turn off the power.
And wait for the voltage-discharge sufficiently.
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 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.
NO
Error Detection
Category
1 Normality 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 and its
connector.
Error Generation Factors Remark
Error Display
Freezer
Temperature
(Error code
①)
Refrigerator
Temperature
(Error code
②
)
4
Defrosting
Sensor Error
Er dS
Short or Disconnection
of Defrosting Sensor
5
Icing Sensor
Error
Er IS
Short or disconnection of
the sensor about Ice maker
(Icing sensor, Ice maker
sensor)
6
Pantry sensor
error
Er SS
Short or Disconnection
of Pantry Sensor
10 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
8
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
(same as model applied
Twisting Ice Maker before)
9
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
Abnormality of
BLDC FAN Motor
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
12
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
14
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
15
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.
7
Room Temp
Sensor Error
Er rt
Short or Disconnectoin of
Room temp.sensor
13
Abnormality of
BLDC FAN
MOTOR For
Refrigerator
Er rF
It is caused when feedback
signal isn’t over 65 seconds
during BLDC FAN motor
operating
Poor BLDC Motor connection,
DRIVE IC, and TR