Sequence For Trouble Diagnosis - Samsung FH18BTA(X) Service Manual

12-3 Sequence for trouble diagnosis

12-3-1 Outdoor temp. sensor(OPEN/SHORT)
Outdoor unit display
Indoor unit display
How to determine Disconnection and short of outdoor temp. sensor
Reason of error Disconnection or leak of applied sensor
Does the out temperature
sensor connected to PCB?
(CN41)
Yes
Measure the resistance value
between two terminals after
separating the out temp. sensor
connector from PCB
At this time, Is largely
deviate the resistance value from side
table value?
No
Check the out temp.
sensor is normal or not by use of
out data display part
© Check the temp. data is
normal or not after pressing K4 3 times.
At this time, is occurred the difference
between the out temp. and data?
Yes
Reoperation after PCB replacement
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(Outdoor temp. sensor OPEN/SHORT error)
(Operation) (Timer) (Airflow)
No
Yes
No
PCB and sensor are normal.
(Filter)
Reoperation
after connect to
connector PCB
Outdoor unit thermistor
is defective(replace)
To perform the test
operation by use of K2
Temp. Resistance
(˚C) (kΩ)
70 2.2
60 3.0
50 4.2
40 5.8
30 8.3
20 12.1
10 18.0
0 27.3
-10 43.0
12-6