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1. When freezer door is open, dispenser stops in order to prevent noise and ice drop to the floor.

2. The icemaker carries out ice ejection or return to the level operation even though the freezer door is open.

3. If freezer door is open, the geared motor and ice cube solenoid immediately stop but duct door solenoid stops after five

seconds.

4. Water dispenser stops water dispensing when freezer door is open.

5. Test function works normally even freezer door is open. 

The above icemaker circuits are applied to dispenser models and composed of icemaker unit in the freezer and icemaker
driving part in PWB. The water is supplied to ice tray for the set time by opening valve which is opened by solenoid relay
for ice valve of solenoid valve located in the machine room. Water supply automatically stops when the set time is
elapsed. This circuit is for the functions of ice ejection, detection of full of ice, levelling, icemaking temperature sensing.
The circuit of icemaking temperature detection is the same as that of temperature detector of main PWB. The circuit of
icemaker test switch input sensor is the same as that of door switch input detector of main PWB.

1. This function carries out when test switch equipped in the icemaker is pressed for more than 0.5 second. This is to

operate the following cycle by force Icemaking 

➝

Ice Ejection 

➝

Return to Level 

➝

Water Supply cycle for operation test,

service, and cleaning of icemaker.

2. Test button does not work during ice ejection and water supply period but works when the tray is horizontal. If the ice

bank is full of ice, ice ejection and water supply controls do not work during test function period. 

3.  If test switch is pressed for more than 0.5 second when tray is horizontal, ice ejection operation will start even though the

water in the tray is not iced over. Therefore water will spill when test switch is pressed if there is water in the tray. Ice
ejection is followed by levelling and water supply operation. It is possible therefore to check the troubles on each ice
ejection, levelling and water supply operations. If the test function works normal, buzzer will  sound and  water supply
control process starts to work. If there is no buzzer sound, therefore, check and repair it as it is abnormal. 

4. When water supply is complete, normal cycle “Icemaking 

➝

Ice ejection 

➝

Return to horizontal 

➝

Water supply” starts to

work.

- 28 -

P53

(HPWM0)

4.7KX2

52

(F /    )

5

7

8

+

CE12

100uF

/25V

R56
68.1/2W

CM6
223/100V

CON9

ICE MAKER
MOTOR

ICE MAKER
TEST  S/W

ICE MAKER
SENSOR

2

10

1

6

4

3

9

CC24

104

CC23

104

CC22

104

55

R54

R55

IC1

(MICOM)

(R /    )

M

IC8

BA6222

CC25

104

R57

2K

R58

4.7K

CC26

104

R59

2K

R60

4.7K

CC27

104

R61

2K

RF6

16.7KF

1

3

2

10

8

6

4

3

2

1

5

HALL

IC

P54

(HPWM1)

P42

(SCK1)

43

42

58

P41

P62

(AIN2)

* Trouble Diagnosis : Troubles can be diagnosed by pressing freezer Temp Control button and Power Freezer button for

more than one second.(It is normal if all LEDs are on.)

- 29 -

No

Yes

Yes

Yes

No

No

No

No

Yes

Yes

Is DC output normal (5V and 12V)?

• Check DC voltage(5V, 12V).

Replace PWB

Is Ice Cube LED off during

trouble check?

• Check resistance of Icemaker 
  Sensor terminals(9, 10) of con9.
• Faults between Icemaker 
  Sensor and Board
  (Pin No. 58 of IC1)

Replace Icemaker 
Sensor

Is Crushed Ice LED off during

trouble check?

• Is the resistance of Ice Ejection
  Motor terminals(1, 3) of CON9
  18~22V?
• Is the circuit of Ice Ejection 
  Motor Drive (IC8 and its
  surrounding circuits) normal?
• Faults between Hall IC and 
  Board(Pin No. 42 of IC1).
• Check if ice is ejected and Ice 
  Tray returns to the original 
  position(level) when test switch 
  is pressed.

Replace Icemaker Unit

Replace Main PWB

Is the ice

ejected and does the 

Ice Tray return to the original

position(level) and is the sound(ding~dong)

heard when Test Switch is pressed

for more than

0.5 second.

• Are the Test switch terminals
  (5, 8) of CON9 open?
• Faults between Test Switch 
  and Board(Pin No. 43 of IC1)

Replace Icemaker Unit

Replace water 
supplying valve

• Is the electric current of water
  supplying valve normal?
• Does the water supplying pump
  normally work?
• Is the water supplying line 
  normally connected?

Is the water normally supplied

to the Ice tray after ice is ejected into

the Ice Bank by Ice Ejection

Motor

Normal

- 47 -

CR3

1

6

1

4

1

10

1

8

R-TEMP

. 

COMPENSA

TION

F-TEMP

. 

COMPENSA

TION

- 48 -