LG LFXS26973 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 “rt E”, “HS E”,
“IS E” (except for Icing room sensor),”SS E”,”Od E”,
“IU E”,”Id E”, “gF E”, “It E” error, are displayed.
“IS E” which is displayed without input of user is the error of Icing Sensor.
NO
Error Detection
Category
1
Ration of display
None Normal
2
Freezer Sensor
Error
FS
E
E
F
E
E
E
E
E
F
E
E
E
E
Short or Disconnection
of Freezer Sensor
3
Refrigerator
Sensor Error
rS
Short or Disconnection
of Refrigerator Sensor
Check each sensor at it’s
connector.
Error Generation Factors
Remark
Error Display
4
Defrosting
Sensor Error
dS
Short or Disconnection
of Defrosting Sensor
5
Icing Sensor
Error
IS
Short or disconnection of
the sensor about Ice maker
(Icing sensor, Ice maker
sensor)
6
Humidity Sensor
Error
HS
Short or Disconnection
of Humidity
10 Poor Defrosting
dH
During 2 consecutive cycles
the defrosting sensor did
reach over 46F (8C)
Temperature Fuse
Disconnection, Heater
disconnection, DRAIN Jam,
Poor Relay for Heater
8
Ice maker kit
defect
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
9
Flow
Meter(Sensor)
Defect
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
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
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
13
Abnormality of
BLDC FAN Motor
for Mechanic
Room
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
14
Communication
Error
CO
E
SS
E
Od
E
Id
E
IU
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
rt
Short or Disconnectoin of
Room temp.sensor
Freezer Refrigerator
Temperature
(Error code
①
)
Temperature
(Error code
②
)
Abnormal Pantry
Sensor
Humidity Sensor Short Or
Open Circuit
Abnormal Wi-Fi
Modem
Abnormal F Room
Icemaker Tray Sensor
Abnormal F Room
IceMaker Kit
Other Electrics System Error Such
As Motor, Gear,Hall IC, Operation
circuit Within I/M Kit
15
16
15
17
18
Icemaker Tray Sensor Short Or
Open Circuit
Communication Error Between
Display And Wi-Fi Modem
Check sensor at it’s connector
Poor Communication Connection
(Short Or Open Circuit)Poor TR
of Transmitter and Receiver Tx/Rx
Check sensor at it’s connector
When the Ice Does not Drop even
when the I/M Test S/W is pressed