No Defrosting - Samsung SR-L676EV Service Manual

3) No defrosting

Precautions
1. Even though both F·R-defrost sensors short-circuit, normal operation continues without
defrosting.(Refer to self-diagnosis function)
2. Even though the temperature fuse is off, there is no heating but defrosting natural
temperature increase comp off-time takes longer.
3. Even though both F·R-defrost sensor are open, heating does not end and comp-off
maintains with temperature fuse short-circuited.(Refer to self-diagnosis function)
Y
A
R Defrost H #14
F Defrost H #15
R Defrost H #18
F Defrost H #19
R Defrost H RY01
F Defrost H RY09
30
Start
Does defrosting
start if the forced defrost
key is pressed?
Y
Is power supplied to
defrost heater?
N
Are MICOM pin 14, 15
"HIGH"?
Y
Are IC 06 pin 17, 18
"LOW"?
Y
Defrost heater
relay is OK?
Reference 2
Y
(Page. 38)
Connector CON C8, 09, 10
are OK?
Y
Evaparator temp. fuse
short-circuited?
Y
Defrost P-cord short-
circuited?
Check wire connection
N
N
Reference7
(Page. 41)
Measure resistance
of defrost sensor
N
N
N
N
N
N
Does the defrost-sensor
register –5˚C?
Y
Forced starting
Replace MICOM & PCB
Replace IC06
Replace relay
Replace CON
Replace temperature fuse
Replace EVAP ass'y
Samsung Electronics