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Appendix
(Reference for circuit diagnostics)
LOAD RELAY TERMINALS VALUE WHEN IT IS DIFFERENT FROM MEASURED VALUE
DEFROST / COMP OFF
RY76 /RY75
SUPPLY
VOLTAGE(SV)
CN71
RY75
SV
CN71
COMP ON
RY76 /RY75
SV
CN71
RY75
0V
CN71
DEFROST
CUBE & AUGER
MOTOR OFF
CUBE & AUGER
MOTOR OPERATING
WATER VALVE
DISPENSER OPERATING
WATER VALVE ICE
MAKER OPERATING
F FAN ON
C FAN ON
RY76 /RY75
0V
CN71
SV
CN71
RY76 CONTACT SHORT,FAULTY DRIVING CIRCUIT
RY75 NO CONTACT SHORT,FAULTY DRIVING CIRCUIT
FAULTY RY75 /
RY76 NO CONTACT SHORT,FAULTY DRIVING CIRCUIT
RY75 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
FAULTY RY76 /
RY75 NC CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY75 NO CONTACT SHORT,FAULTY DRIVING CIRCUIT
RY73 &RY74 NO CONTACT SHORT,FAULTY DRIVING CIRCUIT
RY74 NO CONTACT SHORT,FAULTY DRIVING CIRCUIT
RY73 OR RY74 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY74 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY79 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY77 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY71 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
RY72 NO CONTACT OPEN, FAULTY DRIVING CIRCUIT
Turn on Power and check status of Relay & Driving Circuit by checking followings according to load operation.
Check after disassembling connected to MAIN PCB CN30 &CN32
Because it is NTC TYPE Sensor, risistance decreases as temp increases
1. Measure resistance between CN30 and for R-Sensor.
2. Measure resistance between CN30 and for F-Sensor.
3. Measure resistance between CN30 and for DEF-Sensor.
4. Measure resistance between CN30 and for Ambient-Sensor.
5. Compare the above values with current temps of Sensoer locations and Part Spec in Manual and evalute
them.
RY75
SV
CN71CN70
RY73 /RY74
SV
CN71CN70
RY74
0V
CN71CN70
RY73 /RY74
0V
CN71CN70
RY74
0V
CN71
RY79
0V
CN71
RY77
0V
CN71CN70
RY71
0V
CN71CN70
RY72
Ref.2) Check SENSOR