Indoor Unit Room Sensor Error (Open/Short) - Samsung AM009FN1DCH/AA Service Manual

Troubleshooting

4-4-3 Indoor Unit ROOM sensor Error (Open/Short)

Outdoor unit display
Indoor unit display
Criteria
Cause of problem
1. How to check
Is indoor room temperature sensor
connector dislocated?
After separating indoor room
temperature sensor connector from PCB,
measure the resistance values between
both terminals
is the resistance value significantly
deviated from the temp. table?
Re-start after replacing PCB.
4-30
x x x ( x x x : The address of the error occurred indoor unit )
×(Operation) (Timer)
Refer to how to determine below
The room temperature sensor of No. XXX indoor unit has defective OPEN/SHORT
Yes
Ex) Room temp. 26°C – Resistance 0.926KΩ
Yes
At that time,
Yes
×(Fan) ×(Filter) ×(Defrost)
No
Re-start after connecting
the connector to the PCB.
No
As it is due to an indoor oom temperature
sensor defect, replace it.
Temperature Resistance
(°C) (KΩ)
70 2.2
60 3.0
50 4.2
40 5.8
30 8.3
21 12.1
10 18.0
0
27.3
-10
43.0
Samsung Electronics