Samsung AM080 XV Series - MCU;MCU Subcooler Entrance;Exit Sensor Error (Open;Short)

Troubleshooting
Samsung Electronics 4-33
4-3-16 MCU/MCU subcooler entrance/exit sensor error (Open/Short)
1.
Cause of pr oblem
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 operation 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
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
Outdoor unit
display
(MCU subcooler)
(MCU)
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mount ed (NeoForte)
Operation Defr ost Timer Fan Filter/MPI Operation Defrost Timer F ilter Operation Timer Turbo
××◑◑◑ ×◑◑◑
●
◑◑
※ ●: ON ◑: Flash ×: OFF
Judgment
Method
 Refer to the judgment method below.
Cause of
problem
 MCU/MCU subcooler entrance/exit sensor is open/short