Samsung RF4287HABP, Service Manual

Page: 83 / 132

84
TROUBLESHOOTING
- If defrost has trouble, select the self-diagnostic function to detect the error of defrost heater before
Power Off. (Check the function with the self-diagnostic function)
4-2-6. If defrost does not operate (F,R DEF Heater)
R DEF ERROR F DEF ERROR
Start
Are the all deforst
heater normal?
Check the bimetal, heater
disconnection, wiring connection etc.
Refer to self-diagnostic
function in the manual
Replace the
applicable sensor
manual operation for a certain time
Manual defrosting of fresh food
and freezer compartments
operate simultaneously.
If Energy Saver + Power Cool Key are pressed
simultaneously for 8 seconds and then select any key, 3rd
test mode(manual defrosting) will be operated.
Is the temperature of
defrost sensor lower
than 53.6 ℉ (12°C)?
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.
Normal
Repair connection terminal
Reference If defrost sensor
temperatures of fresh food and
freezer compartments are higher
than 50 ℉ (10 ℃ ), 53.6 ℉ (12 ℃ ) by
the heating from heater, heating
would be finished and will return
to cooling operation after a pause.
Check bimetal, heater itself,
disconnection etc.
Replace failure Relay or
replace PCB ASS'Y
Does the system return
to cooling operation after heating
for specified time?
☞ Checking method of F,R DEF Heater resistance value
CN70-"9"(Brown) ↔ CN70 "13"(Gray)
CN70-"7"(White) ↔ CN70 "13"(Gray)
- Recheck if resistance values are different after the test
1) F DEF Heater 2) R DEF Heater
Resistance value of sensor according to temperature
If you need the
temperature with detail,
refer to DATA1. temperature
table
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 ㏀
**Measuring point of resistance value according to sensor **
F-DEF : CN30#5
↔ CN76#1 measuring resistance value
R-DEF : CN30#8 ↔ CN76#1 measuring resistance value
** 0 Ω : Short trouble / ∞Ω : Open trouble
**Measuring point of resistance value according to heater**
F-DEF : CN70#9(Brown)
↔ CN70#13(Gray) measuring
resistance value(63 ohm ± 7%)
R-DEF : CN70#7(White) ↔ CN70#13(Gray)
measuring resistance value(120 ohm
±
7%)
** 0
Ω
: Short trouble /
∞Ω
: Open(bimetal, heater) trouble
Reference to the manual “Self-Diagnostic”
AW3 SM-EN 2011.3.31 2:56 PM 페이지84 in