Troubleshooting; Error Code Summary - LG LFX28977ST/01 Service Manual

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" error, are displayed.
Error Detection
NO
Category
Normality
1
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
8
Poor Defrosting
Abnormality of
BLDC FAN Motor
9
for Ice Making
Abnormality of
BLDC FAN Motor
10
for Freezer
Abnormality of
BLDC FAN
11
MOTOR For
Refrigerator
Abnormality of
BLDC FAN Motor
12
for Mechanic
Room
Communication
13
Error
Error Display
Freezer Refrigerator
Temperature Temperature
Er FS
Er rS
Er dS
Er IS
Er SS
Er rt
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 Icing Sensor
Short or Disconnection
of Pantry Sensor
Short or Disconnectoin of
Room temp.sensor
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
- 22 -
Remark
Normal operation of Display
Check each sensor and its
connector.
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.