Troubleshooting - LG LFX25992ST Service Manual

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.
Error Detection
NO
Category
1 Normal
Freezer Sensor
2
Error
Refrigerator
3
Sensor Error
Icing Sensor
4
Error
Pantry sensor
5
error
Room Temp
6
Sensor Error
7
Refrigerator
8
Defrosting Error
Ice maker kit
9
defect
Flow
Meter(Sensor)
10
Defect
Poor Defrosting
11
Abnormality of
12
BLDC FAN Moter
for Ice Making
Abnormality of
BLDC FAN Moter
13
for Freezer
Abnormality of
14 BLDC FAN Moter
for Refrigerator
Abnormality of
BLDC FAN Moter
15
for Mechanic
Room
Communication
16
Error
Error Display
Freezer Refrigerator
Temperature Temperature
(Error code ) (Error code
Er FS
Er rS
Er IS
Er SS
Er rt
F dH
r dH
Er It
Er gF
Er dH
Er IF
Er FF
Er CO
Er CO
CO
Er
Error Generation Factors
)
None
Short or Disconnection
of Freezer Sensor
Short or Disconnection
of Refrigerator Sensor
Short or disconnection of
the sensor about Ice maker
(Icing sensor, Ice maker
sensor)
Short or Disconnection
of Pantry Sensor
Short or Disconnectoin of
Room temp.sensor
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
Other Electric system error
such as moter, gear, Hall IC,
operation circuit within I/M kit
Error of flow meter or water
input or low water pressure
Even though it is passed
1 hour since then Defrosting,
if Defrosting sensor is not
over 46°F(8°C), it is caused
It is caused when feedback
signal isn't over 65 seconds
during BLDC FAN motor
operating
It is caused when feedback
signal isn't over 65 seconds
during BLDC FAN motor
operating
It is caused when feedback
signal isn't over 65 seconds
during BLDC FAN motor
operating
It is caused when feedback
signal isn't over 65 seconds
during BLDC FAN motor
operating
Communication Error
between Micom of Main PCB
and Display Micom
- 27 -
FRESH AIR FIL TER
Remark
Normal operation of Display
Check each sensor at it's
connector.
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
When the ice does not drop
even when the I/M Test S/W
is pressed
Error of flow meter or water
input or low water pressure or
flow meter connection
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
Poor BLDC Motor connection,
DRIVE IC, and TR
Poor BLDC Motor connection,
DRIVE IC, and TR
Poor BLDC Motor connection,
DRIVE IC, and TR
Poor BLDC Motor connection,
DRIVE IC, and TR
Poor Communication
connection,Poor TR of
Transmitter and Receiver Tx/Rx
between display and main board.