6-10) If Ice Water Is Not Supplied (Option) - Samsung RF18A Series Service Manual

CHECK THE INSTALLATION STATUS

6-10) If ICE Water is not supplied (OPTION)

1. Please shut the water supplying prior to repair.
2. Power is applied to the one end of wires. Be careful when disassembling not to get an electric shock.
PIN Number
☞ Checking method of voltage Based on
1) Check the voltage of MIC #58 ↔
CN04 #2 - ICE Water valve waiting (about 0V)
2) Q719 ↔ CN04 #2
- ICE Water valve Waiting (about 12V±0.8V)
- ICE Water valve Operating (about 0.7V±0.5V)
3) Check the voltage of Water Valve operating
(AC voltage)
⇒ The Relay RY74 operating.CN71 -"7 ↔ CN70-"1"
- ICE Water valve waiting (about AC 0V)
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sound of the valve operation heard when
Ice maker test switch pushed?
MICOM #90 voltage change
point of main PCB RELAY RY74
MAIN PCB normal
- Need to check the other parts
① Check the wire between Ice water valve ↔ MAIN PCB
② Ice water valve itself has trouble or bad contact of connector.
③ Check the connection hose.
Start
Is the confirming
NO
Does Main PCB IC01
5V/0V?
YES
Does Main PCB MIC01
MICOM #58 voltage have
high(5V) output?
YES
Does Main PCB
Q719 have about 0.7V
output?
YES
Is the contact
normal?
YES
99
YES
Normal
(Check Ice water valve hose.)
NO
Check soldering
short/Replace PCB.
NO
Check soldering
short/Replace PCB.
NO
Check soldering
short/Replace PCB.
NO
Check soldering
short/Replace PCB.