Samsung RH62K Series Service Manual page 67

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TROUBLESHOOTING
4-3-2. Unable to Defrost
CN70
F-DEF-HEATER : Read resistance between MAIN PBA
CN70 #9 and SMPS PBA CN01 #3
Defrost Sensor Voltage is lower than 3.1V
Press the Power Freeze and the Fridge buttons at the
same time for 8 sec and then go into the 2nd Test
F-DEF-SENSOR : Read resistance between CN30 #4
and #7
Check all the sensors
Note
When F-DEF Sensor is higher than
+10 ℃ and +17 ℃ , it will stop heating
and go back to Cooling Operation.
RS6500KC(RH62K)-FSR-160106.indd 67
CN30
Mode.
NO
Start
F-DEF Sensor is NO
normal (with Self Diagnosis)
YES
NO
F-DEF Heater is normal
YES
Defrost Sensor Temp is NO
lower than -5°C
YES
Forced F Defrost
NO
Power is supplied to
Defrost Heater
YES
It goes back to
Cooling Operation after
heating
YES
Normal
MAIN PBA connectors NO
are normal
YES
Check Thermistor, Heater and
their contacts.
Repair or Replace defective
relays, or PBA Ass'y
67
Replace the sensor
Check Thermistor, Heater and their
connectors
Forced Operation for a certain time
Repair the connectors
• Sensor Check Point
1. EXT-ENSOR
2. F-SENSOR
3. F-DEF-SENSOR
4. R-SENSOR
5. R-DEF-SENSOR
6. CV-SENSOR
7. CV-DEF-SENSOR
8. HUM1-SENSOR
9. HUM2-SENSOR
10. ICE-ROOM-SENSOR
11. PANTRY-SENSOR
12. ICE-MAKER-SENSOR
13. IR-SENSOR
2016. 1. 7. 11:04