Samsung RF31FM Series Manual page 208

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6. Self Diagnosis & Trouble Shooting
6-13. If ICE Water is not supplied
3) Check the voltage of Water Valve
operating(AC voltage)
=> For checking the Relay RY78 operating.
CN70-"5"(Red) ↔ CN73_1-"1"(Purple)
- ICE Water valve waiting (about AC 0V)
YES
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
To do list
208