Self Diagnosis; Forced Defrost; Self Diagnostics In The Normal Operation; Self Diagnosis Display Table - Samsung RS20NCSL Service Manual

4) Forced defrost

When the test mode is selected, if F room key is pressed in twice, the forced defrost(1) is selected.
If F room key is pressed in three times, the forced defrost(2) is selected. But the forced defrost(2) mode is not
used.
The beep sound continues, during the heating and resting period.
Damper (cooling air interception) closes until the completion of defrost time.

9-6. Self Diagnosis

1) Self diagnosis in the initial power on
When a power is ON, if internal MICOM will decide faulty in temperature within 1 second.
If faulty sensor is found, the "related display LED" switches ON and OFF for 0.5 second intervals.
At the LED situation is the faulty sensor display, self-test function key (F room key + R room key for
11seconds) is the control of normal temperature is delayed.
Fixing default sensor when there is an error, or press F room key and R room key for 11 seconds, it
automatically cancel self-test function and activate normally.

2) Self diagnostics in the normal operation

If " F-ROOM +R-ROOM" key is pressed for 3 seconds at the normal operation, temperature setting display
proceeds ALL ON/OFF by 0.5 second intervals foe about 4 seconds. If " F-ROOM +R-ROOM" key is pressed
for 7 seconds including 4 seconds of ON/OFF, all displays proceed ALL ON/OFF by 0.2 second intervals for
about 4 seconds. If " F-ROOM +R-ROOM" key is pressed for total 11 seconds including 4 seconds of 0.2
second intervals ON/OFF, all displays becomes ALL ON and " " buzzer occurred, and then start a self
diagnosis.
Self diagnosis is performed from " colder-colder" LED with being OFF in sequence at the state that freezer
/refrigerator temperature setting displays are all ON.
In case of detection inferior sensor, the corresponding display lamp keeps up ON.

(Self diagnosis display table)

No Items
Detaching the sensor Housing, fault of
R-Sensor Connection, open or short of power
1
cable, sensoritse lfinferiority, the others...
Detaching the sensor Housing, fault of
Outer
Connection, open or short of power
2
Sensor
cable, sensoritse lfinferiority, the others...
Detaching the sensor Housing, fault of
F-Sensor Connection, open or short of power
3
cable, sensoritse lfinferiority, the others...
Detachi n g the sensor Housi n g, faul t of
F-room defroster
Connecti o n, open or short of power cabl e ,
4
Sensor
sensori t se l f i n feri o ri t y, the others...
Detaching of fan housing, fault of
F Fan error
Connection, open or short of power
5
cable,fan itself inferiority, constraint by
(only stopping)
fan wings freezing...
Detaching of fan housing, fault of
C Fan error
Connection, open or short of
6
power cable, fan itself inferiority,
(only stopping)
constraint by fan wings freezing...
※ ※ If you try to check the fan error condition, you should check the error at the forced running condition.
Symptorn
Displayed inferiority When temperature
detection of sensor is over 65 ℃or below
-50℃.
Displayed inferiority When temperature
detection of sensor is over 65 ℃or below
-50℃.
Displayed inferiority When temperature
detection of sensor is over 65 ℃or below
-50℃.
Displayed inferiority When temperature
detection of sensor is over 65 ℃or below
-50℃.
In case that BLDC fan motor feed back
signal is not detected ordetected the
abnormal signal.
In case that BLDC fan motor feed back
signal is not detected ordetected the
abnormal signal.
25
Troubles Remarks LED(cf. page23)
R "Cold.Mid"
R room LED No
F "Cold"
F room LED No
F "Cold.Mid"
F room LED No
F "Mid"
F room LED No
F "Mid. Colder"
F room LED No
F "Colder"
F room LED No