LG LSC26905TT Service Manual page 85

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR
(3) GR-L267BV(T,S)PA (Refer to appendix)
The above icemaker circuits are applied to GR-L267BV(T)R, GR-L267BV(T)RA, GR-L267BV(T,S)PA and composed of
icemaker unit in the freezer and icemaker driving part of main PWB. Water is supplied to the icemaker cube mold through
the solenoid relay for ice valve of solenoid valve in the mechanical area by opening valve for the set time. Water supply
automatically stops when water supply time is elapsed. This circuit is to realize the functions such as ice ejection of
icemaker cube mold, ice full detection, leveling, Ice making temperature detection, etc. Refer to the temperature detecting
circuits of Main PWB for Ice making temperature detection. Icemaker test switch input detection is the same as the door
switch input detection circuit of main PWB.
1. It is to force to operate during operation test, service, and cleaning. The test switch is mounted under the automatic
icemaker. The test function starts when the test switch is pressed for more than 1/2 second.
2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If cube
mold is full of ice during test function operation, ice ejection control and water supply control do not work.
3. Ice ejection carries out regardless of ice formation in the ice making tray if test switch is pressed for more than 1/2
second. Water will be splashed if test switch is pressed before the water in the mold is completely frozen. Water will be
supplied while the mold returns to the horizontal conditions after ice ejection. Therefore, the problems of ice ejection,
leveling, and water supply can be checked by test switch. When test function performs normally, buzzer sounds and
water supply shall carry out. Check it for repair if buzzer does not sound.
4. When water supply is completed, normal cycle works: Icemaking ¡ Ice Ejection ¡ Level Return ¡ Water Supply.
5. If icemaker stop switch is set to ON, normal cycle operates: Icemaking ¡ Ice Ejection ¡ Level Return ¡ Water Supply.
If is set to OFF, ice making conducts but ice ejection, level return, and water supply do not work.
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