Suction Temperature Sensor Error (Open/Short) - Samsung AM072/096/120/144FXVAFH Service Manual

4-4-25 Suction Temperature sensor error (Open/Short)

Outdoor unit display
Operation Defrost
Indoorunit display
※ ● : ON ◑ : Flash × : OFF
Judgment Method ∙ Refer to the judgment method below.
Cause of problem ∙ Disconnection or breakdown of relevant sensor. (More than 4.5V or 0.5V less than)
1. How to check
Outdoor unit suction
sensor connector (CN44) connected
to PCB?
Separate the connector of the Outdoor Suction
sensor from the PCB and measure the resistance
value between the 2 terminals.
Is the resistor value matching with
"NOTE1" table?
Restart operation after replace the PCB
Samsung Electronics
Duct, Cassette (1/2 Way),Console, Celing
Timer Fan Filter/MPI Operation Defrost
× × ◑ ◑ ◑
Yes
Resistance value measure part
Yes
Cassette (4/Mini4 Way)
Timer Filter
◑ ◑ ◑
×
No
Restart operation after connecting
the connector to PCB
Temperature(°C)
70
60
50
40
SUCT
30
20
10
0
-10
No
Replace this part as it is the defective of the
Outdoor Suction sensor itself.
Troubleshooting
Wall-mounted (NeoForte)
Operation Timer Turbo
● ◑ ◑
SUCT
NOTE1
Resistance(KΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
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