Samsung RB195ACBP, Service Manual

Page: 51 / 97

Start
Are all the defrost
heater normal?
Check the bimetal, heater disconn-
ection itself, wiring connection, etc
Refer to self-diagnostic
function in the manual
Replace and repair the
applicable sensor
Manual operation for a certain period of time
Manual defrost of Fridge and
Freezer operate simultaneously.
Resistance value of sensor according to temperature
Refer to DATA1.
Temperature Table for the
detailed temperature.
** Measuring point of defrost value according to Heater **
F-DEF : CN72 #7(Brown) ↔ #3(Orange)
measure the resistance value(66/240 ohm ± 10%)
R-DEF : CN72 #5(White) ↔ #3(Orange)
measure the resistance value(103(120)/397ohm ± 10%)
** 0 Ω : Short trouble / 0 Ω : Open(Bimetal, heater) trouble
☞ Checking method of F,R DEF Heater resistance value.
F DEF ; CN72-#7(Brown)
↔ #3(Orange)
R DEF ; CN72-#5(White)
↔
#3(Orange)
-. Check additionally, if resistance values are different after
the measuring.
1) F DEF Heater 2) R DEF Heater
** Measuring point of resistance value according to Sensor **
F-DEF : CN30 #6 ↔ #8 measure the resistance value
R-DEF : CN30 #4
↔
#8 measure the resistance value
** 0 Ω : Short trouble /0 Ω : Open trouble
** Measuring Point of resistance value according to Sensor **
PCB common Ground REG1 Heater Sink and
F-DEF:CN30 #6 (or Sensor Marking #4(R307),
R-DEF:CN30 #4 (or Sensor Marking #2(R303),
measure the resistance value.
** 0V : Short trouble / 5V : Open trouble
86
℉
(30
℃
)
68 ℉ (20 ℃ )
50 ℉ (10 ℃ )
32 ℉ (0 ℃ )
14 ℉ (-10 ℃ )
-4
℉
(-20
℃
)
-22 ℉ (-30 ℃ )
4.22
㏀
6.05 ㏀
8.87 ㏀
13.29 ㏀
20.42 ㏀
32.23
㏀
52.41 ㏀
If Power Freeze Key + Fridge Key are pressed
simultaneously for 8 seconds and then select any key, 3rd
Test Mode(Manual defrost) will be operated.
Is the temperature
of defrost sensor lower than
53.6 ℉ (12 ℃ )?
Is defrost sensor by
self-diagnostic normal?
Is power applied to
each defrost heaters?
Is connection
terminal of Main PCB
part normal?
Recheck the applicable sensor which is not
returned.
If defrost sensor temperature of fridge & freezer are
higher than 50
℉ (10 ℃ ) & 53.6 ℉ (12 ℃ ) by the heating
of heater, heating will be finished and returns to the
cooling operation after making a pause.
Normal
Repair connection terminal
Reference
Check bimetal, heater itself
disconnection, wiring connection,
etc.
Replace failure Relay or replace
PCB Ass'y
Does the system
return to cooling operation after heating
for specified time?
51
TROUBLESHOOTING
- If defrost has trouble, select the self-diagnostic function to detect the error of defrost heater before Power off. (Check the
function with referring to the self-diagnostic function)
4-2-4. If defrost does not operate (F, R DEF Heater)
R DEF ERROR F DEF ERROR
NW-미주향-AC 2010.6.8 3:48 PM 페이지51 in