Samsung RSG257AARS/XAA - 4-2-6) Unable to Defrost

73
TROUBLE SHOOTING
4-2-6) Unable to Defrost
F-DEF-HEATER : Read resistance between CN71 #5 and #9
R-DEF-HEATER : Read resistance between CN71 #7 and #9
F-DEF-SENSOR : Read resistance between CN40 #6 and #8
R-DEF-SENSOR : Read resistance between CN40 #8 and #11
Press the Power Freeze and the Fridge buttons at
the same time for 8 sec and then go into 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 supplied to
Defrost Heater
Repair or Replace defective
relays, or PBA Ass'y
MAIN PBA connectors
are normal
YES
YES
It goes back to
Cooling Operation after
heating
WWhheenn FF//RR--DDEEFF SSeennssoorr iiss
hhiigghheerr tthhaann ++1100℃℃ aanndd ++1177℃℃,, iitt
wwiillll ssttoopp hheeaattiinngg aanndd ggoo bbaacckk ttoo
CCoooolliinngg OOppeerraattiioonn..
NNoottee
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