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NOTCH

TEMP(ûC)

ROOM

Min

Min/

Mid

Mid

Mid/
Max

Max

-15

-16.5

-18

-19.5 

FREEZER

-22

This description is made for GR-349, 389SQ. Please refer to overall PCB circuits for other models.

(1) The refrigerator starts from optimum condition when electric power is first on. But the operation condition changes "Mid"

➝ "Mid/Max" ➝ "Max" ➝ "Min" ➝ "Min/Mid" ➝ "Mid" whenever pressing the FREEZE TEMP button.

(2) It returns to "Mid" conditions if power off and on again.

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(1) Function to raise the freezing speed by operating the COMP successively. As pressing the QUICK FREEZE button, the

QUICK FREEZE LED is displayed. Then after 3 hours' successive operation of COMP, the QUICK FREEZING function
will be released.

(2) Defrosting During the QUICK FREEZING operates as follow.

When the QUICK FREEZING time is below 90 minutes, defrost and then operate the QUICK FREEZING for the
remaining time. When the QUICK FREEZING time is over 90 minutes, defrost and then operate the QUICK FREEZING
for 2 hours

(3) If QUICK FREEZE button is pressed during defrosting, the QUICK FREEZE LED is lit up. But the QUICK FREEZING

operates for 3 hours after 7 minutes from the end of defrosting.

(4) If VACATION button is pressed during the QUICK FREEZING, the QUICK FREEZING LED function is released.

(5) If power off during the QUICK FREEZING and power on again, the QUICK FREEZING function is released.

(1) Function for Energy Saving. As pressing the VACATION button, the VACATION LED is displayed and this function is

operated.

(2) Freezer Compartment is not kept by compressor at the notch displayed but at -13¡C± differential.

(3) Defrosting and Fan control is same as normal operation.

(4) If QUICK FREEZE button is pressed during the VACATION FUNCTION, VACATION FUNCTION is released.

(5) If power off during the VACATION FUNCTION and power on again, the VACATION FUNCTION is released.

(1) When the REFRIGERATOR DOOR is opened and won't be closed after 1 minute from the its opened, BUZZER sounds

to notify it.

(2) At frist, BUZZER sounds three times at each intervals of 0.5 second. Then makes a 0.5 second ON/OFF alarm three

times at intervals of 30 seconds.

(3) If the REFRIGERATOR door closed during ALARM, it is released.

(1) If display function button(FREEZE TEMP, QUICK FREEZE, VACATION) of the front of the TOP COVER is pushed,

BUZZER rings with "DING~ DONG~"(See the BUZZER OPERATION CHECK)

(1) If the accumulated time for the operation of the COMPRESSOR is meet with 7 hours, the DEFROSTING HEATER is

started.

(2) The first defrosting is performed at 4 hours(compressor ON) later since the power is on.

(3) If DEFROST SENSOR is over 7¡C during DEFROSTING, end the operation of DEFROSTING with DEFROSTING

HEATER paused, And after 7 minutes, the operation for the freezing is started.
But, if DEFROST SENSOR is not reach to 7¡C after 2 hours' operation of the defrosting heater, it represents a defrosting
trouble.(See the TROUBLE REPRESENTING FUNCTION)

(4) If DEFROST SENSOR is short or open, defrosting is not performed.

To avoid NOISE and DAMAGE, the items containing an electric parts such as COMP, DEFROSTING HEATER and FAN
MOTOR operate in order as follows.

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CLOSE

OPEN

CLOSE

OPEN

CLOSE

BUZZER

within

1 minute

1 minute

30

seconds

30

seconds

three
times

three
times

three
times

FREEZER

DOOR

WHEN DEFROST SENSOR
TEMPERATURE IS OVER
7¡C. (WHEN PURCHASING 
OR MOVING)

WHEN DEFROST SENSOR 
TEMPERATURE IS BELOW
7¡C. (WHEN POWER  
FAILURE OR SERVICING)

WHEN RETURNING TO NORMAL
STATE FROM TEST MODE

after 0.5 sec.

after 0.5 sec.

after 7 min .

after 0.5 sec.

after 0.5 sec.

after 10 sec.

after 0.5 sec.

after 0.5 sec.

(1) Function to make service easy in case of occuring a trouble in the product.

(2) When occurring a trouble, if the button is pushed, but the function could not operate.

(3) If a toruble release during the representation of trouble, a refrigerator performs the normal function(RESET).

(4) To represent a ERROR CODE, it use FREEZE TEMP LEDs on TOP COVER. If ERROR occurs, the other LEDs except

ERROR CODE LEDs are all off.

1

FREEZER

FREEZER SENSOR open 

SENSOR abnormal

or short.

O

O

2

DEFROST

DEFROST SENSOR open 

SENSOR abnormal

or short.

O

O

No defrosting

3

DEFROSTING

DEFROST HEATER, 

FUNCTION

TEMP. FUSE open or

is abnormal

disconnection (Displayed 
after at least 4 hours 

O

O

O

from the trouble's
occurring.)

4

RT-SENSOR NOTE 

1)

Room Temperature

abnormal

SENSOR open or short 

O

O

O

- 19 -

F1

ERROR CODE LEDs

F2

F3

F4

15 minutes On/
15 minutes Off

* 

NOTE 1) If one second pass after pressing the QUICK FREEZE and FREEZE TEMP buttons togather in normal

operation, operates as follow.  

If normal, LEDs on the TOP COVER is all on. 
If abnormal, LEDs are all on except VACATION LED.

RT-SENSOR

:ON

O : OPERATE NORMAL

:OFF

DOOR................................................................................................................................................................................... 7

DOOR SWITCH.................................................................................................................................................................... 7

FAN AND FAN MOTOR........................................................................................................................................................ 7

DEF' CONTROL ASM .......................................................................................................................................................... 8

LAMP.................................................................................................................................................................................... 8

COMPRESSOR.................................................................................................................................................................... 9

PTC-STARTER..................................................................................................................................................................... 9

OLP (OVER LOAD PROTECTOR) .................................................................................................................................... 10

COMPRESSOR AND ELECTRIC COMPONENTS............................................................................................................ 11

PTC AND OLP.................................................................................................................................................................... 12

ANOTHER ELECTRIC COMPONENT............................................................................................................................... 13

SERVICE DIAGNOSIS CHART.......................................................................................................................................... 14

REFRIGERATING CYCLE ............................................................................................................................................ 15-16

Please read the following instructions before servicing your
refrigerator.

1. Check the set for electric losses.

2. Unplug prior to servcing to prevent electric shock.

3. Whenever testing with power on, wear rubber gloves to

prevent electric shock.

4. If you use any kind of appliance, check regular current,

voltage and capacity.

5. Don't touch metal products in the freezer with wet

hands. This may cause frostbite.

6. Prevent water from following onto electric elements in

the mechanical parts.

7. When standing up after having checked the lower

section of the refrigerator with the upper door open,
move with care to avoid hitting the upper door.

8. When tilting the set, remove any materials on the set,

especially the thin plates(ex. Glass shelf or books.)

9. When servicing the evaporator, wear cotton gloves.

This is to prevent injuries from the sharp evaporator
fins.

10. Leave the disassembly of the refrigerating cycle to a

specialized service center. The gas inside the circuit
may pollute the  environment.

- 2 -