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Troubleshooting

21Samsung Electronics

6-3-2 Indoor unit Pipe Sensor in Trouble

1. Check the assembly condition of the sensor connector(CN43) on the indoor unit Main PCB and if not assembled, reassemble

the connector accurately.

2. Detach the indoor pipe sensor connector(CN43) and check the resistance between connector 3 and 4.

If the above data is not met, replace the indoor pipe sensor.

3. Assemble the indoor pipe sensor to PCB, plug in, and check the voltage of connector 3 and 4. If the resistance is below 0.5V or

over 4.9V, replace the indoor Main PCB (PCB phase short or disconnected)

Indoor unit Heat exchange temperature sensor open or short

Error mark Error Part

7-SEGMENT

E2

Temperature(˚C)

15

20

25

Resistance Value (KΩ)

8.31

6.94

5.83

Temperature(˚C)

30

35

40

Resistance Value (KΩ)

8.31

6.94

5.83

OTHERS

The data error is ±1%.

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