55
TROUBLESHOOTING
4-2-3. When Defrost does not work (F DEF Heater)
Defrost Sensor is
normal? (Check it
with Self-Diagnosis)
The Sensor
Temperature Value
is lower than 12℃.
After heating up for a while, it
goes back to Cooling Operation
MAIN PCB
Connection is normal?
Power is applied to
F-Defrost Heater.
Start
Do Forced Defrost
Normal
Check Bimetal, Heater Wire
Cut or Wire Contact
Repair Defective Relay or
replace PCB Assy
Replace the Sensor
Forced Operation for a while
Repair Connector
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
ᶗ@@w@@@
@s@d
F DEF. ERROR
Check Bimetal, Heater
Continuity or Wire Connection
All Defrost Heaters
are normal?
Yes
No
Check the related sensors
if they are defective.
Temp vs. Resistance Table
30
℃
4.22
ὶ
For more
detail data,
refer to
DATA1. Temp
Table
20
℃
6.05
ὶ
10
℃
8.87
ὶ
0
℃
13.29
ὶ
-10
℃
20.42
ὶ
-20
℃
32.23
ὶ
-30
℃
52.41
ὶ
SEG Voltage Watt OHM
RT29/
RT32
230 130 406.9
120 130 110.8
RT35/
RT38
230 160 330.6
120 160 90.0
RT22/
RT25
230 120 440.8
120 120 120.0
** Sensor Resistance Reading Location **
F-DEF : Between CN30 #4 (RED) ↔ CN76-"1" (BRN)
** 0Ω : Short / ∞Ω : Open
** Sensor Voltage Reading Location **
F-DEF : Between PCB COMMON Ground
and CN30 #4 (or SEN_2)
** 0V : Short / 5V : Open
Note When the temperature of the F DEF Sensor
goes over 12℃ with the Defrost Heater heating up, it
stops heating and it goes back to Cooling Operation.
After pressing the Power Cool and
the Fridge buttons simultaneously for
6 seconds, push the Fridge button to
enter the Test Mode.
And then, when any one of the buttons
is pressed twice, the Forced Defrost will
start and "3℃, 5℃ and 7℃" LEDs will
light up on the display panel.
** Heater Resistance Reading Location **
F-DEF : Resistance between CN70 #5 (BRN) ↔
CN77 #3 (ORG) should be ohm ± 10%.
** 0Ω : Short / ∞Ω : Open
(Bimetal / Thermal Fuse / Heater Defect)
- When there is a trouble in defrosting, select the Self-Diagnosis function before turning off the unit. And,
check if there is any defect in the Defrost Heater. If not, plug out the unit and do the Trouble-Shooting. (Refer
to the Self-Diagnosis function and check the details)
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