
24
Operation Principle and Repair Method of Ice Maker & Dispenser
3. Failure Diagnosis Method of Ice Maker
* Method to diagnose failure: Failure can be checked when pressing the F-temperature control button and the R-
temperature control button for more than a second (if the front LED turns on, it means normal operation): Refer to Failure
Diagnosis Function subscribed in Clause 2-10, MICOM Function.
Is DC power (5V, 12V)
normally output?
Is LCD on the cub ice
display part turned off
when checking failure
diagnosis?
Is LCD on the crushed
ice display part turned off
when checking failure
diagnosis?
Normal
Is ice separation
and that returning to the
horizontal status normally performed
when pressing the test switch for more
than 0.5sec, and does sound
Ding~”
occur once?
Is water
normally supplied
after the ice-maker container
performs ice separation andr eturning
to the horizontal status by an
ice separation
motor?
Defect of power terminal
Replace Main PWB
Replace ice-making
sensor.
Replace Ice Maker
Unit.
Replace Ice Maker
Unit.
Replace water
supply valve.
Replace Main PWB
No
Yes
Yes
Yes
No
No
No
Yes
Yes
No
• Check DC power (5V,12V)
Defect of ice-making sensor
• Check resistance value at the both
ends (1, 2) of the ice-making
sensor of CON13.
• Defect between ice-making sensor
and board (Pin No. 36 of IC1)
Defect of Ice Maker Unit
• Is resistance value at both ends
(9, 10) of the ice separation motor
of CON13 18~22W?
• Is drive circuit (IC 13 and
peripheral circuit) of the ice
separation motor normal?
• Defect between Hall IC and board
(Pin No. 71 of IC1)
• Check ice separation and that
returning to the horizontal status
are done when pressing the test
switch.
Defect of Ice Maker Unit Test Switch
• Do both ends (5, 6) of the test
switch of CON 13 open status?
• Defect between test switch and
board (Pin No. 72 of IC1)
Defect of water supply
• Is the water supply valve
conducted?
• Does the water supply pump
normally operate?
• Is water supply line normally
connected?