Samsung RSJ1K Series, Service Manual

Page: 69 / 107

69
TROUBLE SHOOTING
4-2-3) Unable to Defrost
F/D-SEN:Read Resistance between CN30 4 and 9
R/D-SEN:Read Resistance between CN30 10 and 9
F-DEF:Read Resistance between CN70 7 and 3
R-DEF:Read Resistance between CN70 5 and 3
F-SEN:Read Resistance between CN30 3 and 9
R-SEN:Read Resistance between CN30 7 and 9
Press the Power Freeze and the Fridge buttons at
the same time for 8 sec. Then, the 2nd Test mode.
Defrost Sensor Voltage is lower than 3.1V
Start
Forced F/R Defrost
Check all the sensors
Normal
Check Thermistor, Heater and
their contacts.
Replace the sensor
NO
Repair the connectors
NO
YES
YES
F/R-DEF Sensor is
normal (with Self Diagnosis)
Check Thermistor, Heater
and their connectors
NO
YES
F/R-DEF Heater is
normal
Forced Operation for a certain time
NO
YES
NO
NO
Defrost Sensor Temp is
lower than -5°C
Power is applied to
Defrost Heater
Repair or Replace defective
relays, or replace PCB Ass'y
MAIN PCB connectors
are normal
YES
YES
It goes back to
Cooling Operation after
heating