DOWNLOAD LG GR-L247ER Service Manual ↓ Size: 5.74 MB | Pages: 127 in PDF or view online for FREE

1. Fan motor in the freezer compartment shall change from standard to high speed rpm in order to increase cooling speed

and load corresponding speed.

2. High speed rpm is only used for the initial power  application and load corresponding  operation. But  standard rpm  is

used  in the  general working conditions.

3. Fan motor in the freezer compartment operates normally when freezer, refrigerator, or home  bar door opens and fan

motor in the freezer compartment operates (the speed changes from high to standard rpm if fan motor operates at high
speed rpm). But fan motor in the freezer compartment stops when refrigerator or home bar door is open and refrigerator
compartment door is closed.

1. Buzzer warns when freezer, refrigerator, or home bar door is kept open for more than 1 minute.

2. Buzzer warns 3 times at 0.5 second interval and then 3 times at 0.5 second on and off in every 30  seconds if door is kept

open for more than 1 minute.

3. Warning is released  when freezer, refrigerator, or home  bar door is closed during door opening alarm.

1. “Bell” sounds when button on the front display is pressed.

1. When test button in the main PWB is pressed, “beep” sounds.

2. When forced start is selected, warning sounds three times for 0.2 second on and 1.8 seconds off.

3. When forced defrost is selected, warning sounds three times in the following cycle: 0.2 second on and 0.2 second off, 0.2

second on and 0.2 second off, and 0.2 second on and 1.0 second off.

1. Defrost starts whenever the compressor operation time accumulates to seven to seven and a half hours.

2. Defrost starts whenever the compressor operation time accumulates to four to four and a half hours if power is initially

applied (or reapplied after power cut).

3. Defrost completes  when the temperature of defrost  sensor reaches at 5 

°

C. Faulty defrost is indicated if the defrost

sensor does not reach at 5 

°

C after 2 hours of defrosting.

4. Defrost does not work when defrost sensor is out of order (wire cut or short-circuit).

- 26 -

Closed

Open

Closed

Open

3Times

3Times

3Times

3Times

Closed

Within one minute

one minute

30

 Seconds

30

 Seconds

30

 Seconds

Freezer, 

Refrigerator,

or 

Home Bar Door

Buzzer

Electric equipment such as compressor, defrost heater, cooling fan, step motor damper, etc. operates in the following
sequence when power is initially applied and test is completed in order to reduce  noise and parts damage.

- 27 -

When

po
w

e

r

is

initially

applied

TEST

MODE

Defrost sensor
temperature is
above 10 

°

C 

(purchased or

house-moving)

If there is any error in
functions, initial
starting does not
work.

If switch is pressed
one more or defrost
sensor temperature
is above +5 

°

C, it

returns to test mode
and restarts.
(compressor shall
operate after 7
minutes)

Defrost sensor
temperature is
below 10 

°

C

(power cut or
service)

Test Mode 1
(Forced Start)

Test Mode 2
(Check Freezer
fan )

Test Mode 3
(Forced defrost)

0.5

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.5

sec.

8

sec.

0.3

sec.

5

sec.

5

sec.

0.3

sec.

27

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

0.3

sec.

1. Function of trouble diagnosis is to make the repair  service easy when the refrigerator is out of order during service.

2. The function control button does not work but the recognition sound is heard when the refrigerator is out of order.

3. It returns to normal conditions when trouble code led is off. (reset)

4. Trouble code is indicated by the freezing temperature indicator led in the refrigerator display. All leds except trouble code

are off.

- 28 -

Max

Min

1

3

5

TROUBLE

CODE INDEX

A

B

C

D

Trouble Code Indicator

Operation conditions during Trouble

No.

Trouble

Troubles

Freezer

Defrost

Step motor

F4      F3     F2     F1

Compressor

Fan

Heater

Damper

1

Abnormal Freezer 

l

l l 

Freezer sensor short 

15 min. on/ Standard

ˇ 

ˇ 

sensor. 

15 min. off

RPM

Abnormal Refrigerator 

2

sensor 1 (R1)

l l  l

Refrigerator sensor 1 short circuit

ˇ 

Standard

ˇ 

Note 2)

(Upper part in the

RPM

refrigerator compartment)

Abnormal Refrigerator

3

sensor 2 (lower part 

Note 1)

Refrigerator sensor 2  short circuit

ˇ 

Standard

ˇ 

ˇ 

in the refrigerator 

RPM

compartment)

4

Abnormal Defrost 

l  l l

Defrost sensor short circuit

ˇ 

Standard

No 

ˇ 

sensor 

RPM

defrosting

Failed defrosting

Defrost Heater, Temperature Fuse 

5

   

short circuit. 

ˇ 

Standard

ˇ 

ˇ 

Unplugged Connector

RPM

(Indicated 4 hour later after trouble)

Abnormal Open Air 

Open air temperature detecting sensor 

6

Temperature 

Note 1)

short circuit

ˇ 

ˇ 

ˇ 

Detecting sensor

7

Abnormal

Note 1)

Defrost sensor short circuit.

ˇ 

ˇ 

ˇ 

ˇ 

ice making sensor

Abnormal

Faulty Ice Maker Unit Motor or

8

ice maker unit

Note 1)

Hall IC, L/Wire short circuit.

ˇ 

Standard

ˇ 

ˇ 

Faulty motor driving circuit.

RPM

   

: On

l 

: Off

ˇ  

: Normal

Note 1) When open  air temperature detecting  sensor, refrigerator sensor 2, ice maker unit, ice  making sensor are

abnormal, it is not indicated in the trouble code. But it  is   indicated while checking LED (press freezer and
refrigerator temperature control buttons  for more than 1 second  at the same time).

Room Temperature 

Normal :

LED On.

Detection Sensor

Abnormal : 

LED Off.

Refrigerator Sensor 2 

Normal :

LED On.

(lower shelf)

Abnormal : 

LED Off.

Home Bar Sensor

Normal :

LED On.

Abnormal : 

LED Off.

Ice Maker Unit

Normal :

LED On.

Abnormal : 

LED Off.

Note 2) When refrigerator sensor is abnormal, it opens for 10 minutes and closes for 15 minutes.

1. Test function is to check the function of PWB and products and to find defective parts when the refrigerator is out of order.
2. Test button is on the main PWB of the refrigerator. Test mode completes after 2 hours in maximum and returns to normal

conditions.

3. Function control button does not work but button recognition sound is heard during the test mode.
4. When test mode is completed, unplug and replug the power cord to return to the normal conditions.
5. When sensor is abnormal in the test mode, test mode is released and trouble code is indicated.
6. Test mode does  not work even test button is pressed when trouble code indicator is on.

- 29 -

Test 1

Test 2

Test 3

Normal

Press test button once

Press test button once in
Test Mode 1

Press test button once in
Test Mode 2

Press test button onec in
test mode 3

1. Continuous compressor operation
2. Continuous freezer fan (high rpm) operation
3. Defrost heater off.
4. All display LEDs are on.
5. Electronic stepping motor damper open

(baffle is open).

1. Compressor off.
2. Freezer fan (high rpm) off.
3. Freezer fan (standard rpm) on.
4. Defrost heater off.
5. “Medium Weak” led in freezer and

refrigerator temperature indicators are on.

6. Step motor damper open condition 

(baffle is open)

1. Compressor is off.
2. Freezer fan off.
3. Defrost heater on.
4. “Medium” leds in freezer and refrigerator

temperature indicators are on.

5. Step motor damper closed condition 

(baffle is open)

Return to initial conditions

Forced start

Check fan in the freezer 
compartment 

• Return to normal

conditions when defrost
sensor is above 5 

°

C.

• Forced defrost.

Compressor starts after
seven minutes.

A

A

B

B

C

C

D

D

The rest of 
LEDs are all on