Troubleshooting - LG LFX28978 series 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
Defrosting
4
Sensor Error
Icing Sensor
5
Error
Pantry sensor
6
error
Room Temp
7
Sensor Error
Ice maker kit
8
defect
Flow
9
Meter(Sensor)
Defect
10 Poor Defrosting
Abnormality of
11
BLDC FAN Motor
for Ice Making
Abnormality of
12
BLDC FAN Motor
for Freezer
Abnormality of
BLDC FAN
13
MOTOR For
Refrigerator
Abnormality of
BLDC FAN Motor
14
for Mechanic
Room
Communication
15
Error
Error Display
Freezer Refrigerator
Temperature Temperature
(Error code ) (Error code
Er FS
Er rS
Er dS
Er IS
Er SS
Er rt
Er It
Er gF
Er dH
Er IF
Er FF
Er rF
Er CF
Er CO
Error Generation Factors
)
None
Short or Disconnection
of Freezer Sensor
Short or Disconnection
of Refrigerator Sensor
Short or Disconnection
of Defrosting 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
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
- 21 -
Remark
Normal operation of Display
Check each sensor at it's
connector.
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.