80TROUBLESHOOTING4-2-13. If Water is not suppliedó Checking method of Valve resistance (Mustpower off for checking)Resistance can be changed by input voltage.CN70#1 (Red) ® CN73#5 (White-black)- resistance value ; 388(1.6k)Ohm 7%)** 0ʃ: Short trouble / ʃ: Open troubleStartIs the confirming sound ofthe valve operation heardwhen dispenser switchpushed?Is the valve unit normal?Is the voltage of PCB IC01MICOM #15 changed 0V~5Vaccording to switch On/Off?Does Main PCB IC73 #3have about 5V input?Does Main PCB IC73 #14have about 0.7V output?Is the contact point of mainPCB RELAY RY7A normal?MAIN PCB normal-- Need to check the other parts˝ Check the wire between water valve ®MAIN PCB˞ Ice water valve itself has trouble or badcontact of connector˟ Check the connection hoseˠ Check the operation between Panel PCBand MAIN PCB for Communication.Normal(Check Icewater valve hose)Replace ValveCheck solderingshort/Replace PCBCheck solderingshort/Replace PCBCheck solderingshort/Replace PCB1) Check the dispensinglever2) Check switch unit/ wiringconnection3) Replace PCBtypical PCB Ground CN1#3(Black)ó Checking method of voltageBased on PCB typical Ground CN1#3(Black)1) Check voltage of IC73# (same voltage asIC01#64)- Water valve operating (about 5V0.5V)Based on PCB typical Ground CN1#3(Black)2) IC73 #14 voltage- Water valve operating (about 0.7V0.5V)3) Check the voltage of Water Valve operating(AC voltage)=> For checking the Relay RY7A operating.CN70#1(Red) ® CN73#5(White-black)- ICE Water valve waiting (about AC 0V)- ICE Water valve operating (about AC 110(230)V 20%)
