Samsung AM072FXVAFH series - MCU;MCU Subcooler Entrance;Exit Sensor Error (Open;Short)

Troubleshooting
Samsung Electronics 4-47
1.
Cause of problem
Is the sensor connector connected on the PCB ?
Is the resistor value matching
with “NOTE1” table?
Separate the connector from the PCB and measure
the resistance value between the 2 terminals.
Restart ope
ration after replace the PCB
Restart operation after connecting
the connector to PCB
Replace this part as it is the defective itself.
No
No
Yes
Yes
Yes
4-4-16 MCU/MCU subcooler entrance/exit sensor error (Open/Short)
Outdoor unit display
(MCU subcooler)
(MCU)
Indoor Unit Display
Judgment Method
 Refer to the judgement method below.
Cause of problem
 MCU/MCU subcooler entrance/exit sensor is open/short
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation
Defrost TimerFan Filter/MPI
Operation
Defrost Timer Filter
Operation
TimerTurbo
××◑◑◑×◑◑◑ ● ◑◑
※ ● : ON ◑ : Flash ×: OFF
NOTE1
Temperature(°C) Resistance(K)
70
60
50
40
30
20
10
0
-10
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0