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Diagnostics
8-8) Dispenser Lamp Malfunction
1. Long term LED Short when exchanging may result in the malfunction of PCB since Dispenser Lamp is high
brightness LED.
2. When changing the PCB, the power must be turned off.
Reconfirm connection wire
and Lamp PCB repair/change
Note
Ice & water S/W push
handle repair/change
Is ice & water S/W push
handle works well?
YES
NO
Ice & water S/W change
Is ice & water S/W
contact point works well?
YES
NO
Wire between dispenser
part and main PCB check/repair
Does PCB main part CN31
2, 3-4 have right
voltage output?
YES
NO
Connector check/repair
Does panel PCB CN2
connector connected well?
YES
NO
Connector check/ Main PCB
change (Main PCB CN50 and
Panel PCB CN1 connection check)
Does Panel PCB F-room
& R-room temperature
display work well?
YES
NO
CHECK METHOD
Separate the switch and check
the resistance with teste.When
S/W is selected or stands by, 0
Ω or Ω is pick up.
1) Only 0 Ω is pick up : S/W
SHORT DEFECT
2) Only
Ω is pick up : S/W
OPEN DEFECT
CHECK METHOD
Check the voltage with tester on
CN31 , When S/W is
selected or stands by, OV or5V
is pick up.
1) Only OV is pickup : S/W SHORT
DEFECT
2) Only 5V is pick up : S/W OPEN
DEFECT
*SHORT : LAMP always ON,
OPEN : LAMP always OFF
3) ICE S/W :
, WATER S/W
:
Check Water
Valve Operation