Samsung CH070EAMC, Service Manual

Page: 105 / 126

Samsung Electronics
Troubleshooting
12-3 Sequence for trouble diagnosis
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
12-3-1 Outdoor temp. sensor(OPEN/SHORT)
Outdoor unit display
Indoor unit display
How to determine
Reason of error
(
Outdoor temp. sensor OPEN/SHORT error
)
(Operation) (Timer) (Airflow) (Filter)
Disconnection and short of outdoor temp. sensor
Disconnection or leak of applied sensor
Yes
No
Yes
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
Does the out temperature
sensor connected to PCB?
(CN41)
At this time, Is largely
deviate the resistance value from side
table value?
Temp.
(˚C)
70
60
50
40
30
20
10
0
-10
Resistance
(kΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
Measure the resistance value
between two terminals after
separating the out temp. sensor
connector from PCB
No
12-6