Page 1
12. Tr o u b l e s h o o t i n g
12-1 The refrigerator does not operate
Is the interior
light on when the door switch
is pushed?
Yes
Does the compressor operate?
Yes
The compressor is operated for more
than 30 minutes and the refrigerator.
Make sure the refrigerator is plugged in
No
at the wall outlet.
Yes
No
Make sure that the
thermometer in the freezer compartment
is electrically connected.
Yes
Check the defrost timer
Yes
Check the P.T.C. relay
Yes
Check the overload relay
No
Replace the defective part
If the fan operates when you
No
push the door switch, it is normal
(Replace if it is defective)
No
Replace the defective part
No
Check the electrical connection
Yes
Yes
Check the condenser
No
Check for the abnormalities
The compressor is defective
The freezing cycle has a problem
Yes
The compressor is defective
Samsung Electronics 3 3
Page 2
12-2 Defrosting mechanism does not work
Check that the defrost timer
No
operates properly
Yes
Check the temperature fuse
Yes
Check the bimetal thermometer
Yes
Check the defrost heater
No
No
No
12-3 Defrosting mechanism does not work
Replace the defrost timer
Replace the temperature fuse
Replace the bimetal thermometer
Replace the defrost heater
Does the cooling fan operate?
Yes
Is the freezer defrosted normally?
Yes
Is the door closed properly?
Yes
Is the door stopper hinge normal?
Yes
Is too much food stored in the
freezer compartment?
No
• Check the cooling fan motor
• Check the door switch
No
• Defrost timer
• Temperature fuse/Bimetal thermometer
• Defrost heater
No
• Check that the door gasket is properly
seled, check for the damaged gasket.
No
• Correct or readjust the door stopper
hinge
No
• Tightly cover stored ice cubes.
• Tightly cover stored frozen food.
• Destribute food evenly in the comparment.
3 4 Samsung Electronics
Page 3
12-4 Trouble check for the cooling cycle
Symptom
• The EVAP cools down and warms
again.
• The condenser warms in proportion
as the EVAP cools.
• The process continues to repeat.
• The condenser is cold.
• The EVAP is not cold.
• The temperature of the compressor
is high.
• No difference in temperatures
between suction pipe and discharge
pipe.
• The temperature of the compressor
is maintained at room temperature.
• The EVAP does not cool down.
Cause
Moisture in the refrigerant
causes the malfunction.
Foreign substances hamper
the cooling cycle.
The compressor is defective
Suggestions
Replace the refrigerant
Locate the disturbed section
and make repairs
Replace the compressor
• Frost on the suction pipe.
• The condenser is overheated.
• The refrigeration in the EVAP is
not effecient.
• The condenser is cold.
• The compressor surface
temperature is high.
• The refrigerator is not easily get
cooled.
Too much refrigerant Replace the refrigerant
Refrigerant leaks.
(Slight refrigerant leakage
causes partial cooling with
frost on the EVAP)
After welding the leaked spot,
replace the refrigerant
Samsung Electronics 3 5
Page 4
12-5 Diagnosing the main components
C o m p o n e n t s
C o m p r e s s o r
P.T.C Relay
C o n d e n s e r
Overload relay
Freezer compartment
circulation Fan motor
Diagnosing methods and criteria L o c a t i o n
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
• Use the tester to measure the
r e s i s t a n c e .
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
Measuring point
Primary wire
Secondary wire
N o r m a l
Approx 10Ω ~ kΩ
N o r m a l
Approx 10Ω ~ 80kΩ
N o r m a l
Approx 200kΩ
N o r m a l
Approx 100Ω ~ 20kΩ
N o r m a l
Approx 10 ~ 500kΩ
3 ~ 20Ω
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
0Ω and ∞Ω
M e c h a n i c a l
c o m p a r t m e n t
M e c h a n i c a l
c o m p a r t m e n t
Electrical equipment
b o x
M e c h a n i c a l
c o m p a r t m e n t
M e c h a n i c a l
c o m p a r t m e n t .
Freezer compartment.
Rotating blade motor
Door switch
Defrost timer
Defrost heater
B i m e t a l
Temperature fuse
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
• Use the tester to measure the
r e s i s t a n c e .
• Use the tester to measure the
r e s i s t a n c e .
• Use the tester to measure the
r e s i s t a n c e .
– Bring the component to cool down
completely before measuring.
• Use the tester to measure the
r e s i s t a n c e .
N o r m a l
Approx 10Ω ~ 20kΩ
Measuring point
A B contact point
When the switch is
on by the contact
Measuring point
Between terminals
Temperature fuse terminal
N o r m a l
Approx 3KΩ ~ 6KΩ
Measuring point
Bimetal terminal
Temperature fuse
t e r m i n a l
N o r m a l
Approx 200MΩ
N o r m a l
Approx 200MΩ
Approx 10Ω~300KΩ
N o r m a l
Approx 200MΩ
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
MΩ and ∞Ω
A b n o r m a l
0Ω and ∞Ω
A b n o r m a l
MΩ ~ ∞Ω
A b n o r m a l
Ω ~ ∞Ω
Fresh food
c o m p a r t m e n t
Between the upper
and the lower doors
Electrical equipment
b o x
Lower EVAP
E V A P
3 6 Samsung Electronics
Loading...