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Troubleshooting
4-3-2 Indoor Unit ROOM sensor Error (Open/Short)
Outdoor unit display
Indoor unit display
Criteria
• Refer to how to determine below
Cause of problem
• The room temperature sensor of No. XXX indoor unit has defective OPEN/SHORT
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
At that time,
is the resistance value significantly
deviated from the temp. table?
Re-start after replacing PCB.
4-40
x x x ( x x x : The address of the error occurred indoor unit )
(Operation)
(Timer)
(Fan)
Yes
Ex) Room temp. 79°F/26°C – Resistance 0.926KΩ
Yes
Yes
(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
(KΩ)
(°F)
(°C)
158
70
2.2
140
60
3.0
122
50
4.2
104
40
5.8
86
30
8.3
70
21
12.1
50
10
18.0
32
0
27.3
14
-10
43.0
Samsung Electronics
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