LG LSSB2691ST Service Manual page 16

Micom Function
2-10. Function of Trouble Diagnosis (88-LED)
1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product
during use of product.
2. In occurrence of failure, pressing the function adjustment button does not perform function and only alarm sound (Ding)
rings.
3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state
(Reset).
4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting
temperature for the cold storage room of LED, which are placed at the display part of a refrigerator. All the LED graphics
other than a failure code are turned off.
CAUTION 1) DEFECT FAILURE CODE IS INDICATED ON THE DISPLAY PART OF SETUP TEMPERATURE FOR THE COLD STORAGE ROOM AND
OF SETUP TEMPERATURE FOR THE FREEZING ROOM, AND THE OTHER DISPLAY PART IS TURNED OFF.
2) MAKE A PROPER OPERATION THROUGH REAPPLICATION AFTER ALWAYS TURNING OFF POWER WHEN DIAGNOSING FAILURE
AND FINISHING TEST MODE.
(1) FAILURE DIAGNOSIS FUNCTION
NO ITEM
ABNORMAL
1
FREEZER SENSOR
ABNORMAL REFRIGERATOR
SENSOR1(R1)
2
(UPPER PART IN THE
REFRIGERATOR COMPARTMENT)
ABNORMAL REFRIGERATOR
SENSOR2(R2)
3
(UPPER PART IN THE
REFRIGERATOR COMPARTMENT)
ABNORMAL FREEZER DEFROST
4
SENSOR
ABNORMAL REFRIGERATOR
5
DEFROST SENSOR
FAILED FREEZER DEFROSTING
6
FAILED REFRIGERATOR
7
DEFROSTING
ABNORMAL FREEZER FAN
8
MOTOR
ABNORMAL REFRIGERATOR FAN
9
MOTOR
ABNORMAL CONDENSOR FAN
10
MOTOR
11 ABNORMAL COMMUNICATION
12 ABNORMAL AMBIENT SENSOR
13 ABNORMAL WATER TANK
SENSOR
NOTE1) "Er rt", "Er SS", "Er r2", Appears on the display when Ice Plus key and Freezer Temp. Key pressed at the same time for 1 sec.
NOTE2) Except 3 Errors displayed above, all the errors are displayed on the panel after 3 hours from the initial error.
NOTE3) All the errors can be displayed within the 3-hour period upon pressing the Ice Plus. key and the Freezer Temp. key at the same time for
1 second or longer.
MICOM FAILURE DIAGNOSIS TABLE
Error Code Error Code
FAILURE CODE INDICATION PART
FREEZER ROOM REFRIGERATOR
CONTENTS OF FAILURE
NOTCH ROOM NOTCH
TEMPERATURE TEMPERATURE
DISPLAY DISPLAY
FREEZER SENSOR SHORT&OPEN
Er FS
CIRCUIT
REFRIGERATOR SENSOR(R1)
Er rS
SHORT&OPEN CIRCUIT
REFRIGERATOR SENSOR(R2)
Er r2
SHORT&OPEN CIRCUIT
FREEZER DEFROST SENSOR
F dS
SHORT&OPEN CIRCUIT
REFRIGERATOR DEFROST SENSOR
r dS
SHORT&OPEN CIRCUIT
DEFROST HEATER, TEMPERATURE
F dH
FUSE SHORT CIRCUIT, UNPLUGGED
CONNECTOR (INDICATED 4 HOUR
r dH
LATER AFTER TROUBLE)
MORTOR DEFECT, HOKED OF LEAD
Er FF
WIRE TO FAN CONTACT OF
STRUCTURE WITH FAN, SHORT OR
Er rF
OPEN OF LEAD WIRE(THERE NO
SIGNAL OF BLDC FAN MOTOR MORE
THAN 65 SECONDS IN OPERATION
Er CF
OF FAN MOTOR
SHORT OR OPEN OF LEAD WIRE
CONNECTING BETWEEN MAIN PCB
Er CO
AND DISPLAY PCB, TRANSMISSION
TR AND RECEIVING PART.
AMBIENT SENSOR SHORT&OPEN
Er rt
CIRCUIT
WATER TANK SENSOR
Er SS
SHORT&OPEN CIRCUIT
PRODUCT OPERATION STAUS IN FAILURE
FREEZER
COMPRESSOR
FAN MOTOR
ON FOR 30
MINUTES/
OFF FOR 10
MINUTES
16
: PROPER OPERATION
FREEZER REFRIGERAT-
REFRIGERATOR CONDENSER
DEFROST OR DEFROST
FAN MOTOR FAN MOTOR
HEATER
NO
DETROST
DETROST
HEATER
NO