Sequence For Trouble Diagnosis - Samsung HH175EZM 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
Reason of error
Does the out temperature
sensor connected to PCB?
(CN41)
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?
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?
Reoperation after PCB replacement
Samsung Electronics
(Outdoor temp. sensor OPEN/SHORT error)
(Operation) (Timer)
Disconnection and short of outdoor temp. sensor
Disconnection or leak of applied sensor
Yes
No
Yes
(Airflow) (Filter)
No
Reoperation
after connect to
connector PCB
Yes
Outdoor unit thermistor
is defective(replace)
No
PCB and sensor are normal.
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