Mcu/Mcu Subcooler Entrance/Exit Sensor Error (Open/Short) - Samsung AM072/096/120/144FXVAFH Service Manual

4-4-16 MCU/MCU subcooler entrance/exit sensor error (Open/Short)

Outdoor unit display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost
Indoor Unit Display
×
※ ● : ON ◑ : Flash × : OFF
Judgment Method ∙ Refer to the judgement method below.
Cause of problem
∙ MCU/MCU subcooler entrance/exit sensor is open/short
1. Cause of problem
Is the sensor connector connected on the PCB ?
Separate the connector 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
(MCU subcooler)
(MCU)
Timer Fan Filter/MPI Operation Defrost
× ◑ ◑ ◑ ×
Yes
Yes
Yes
Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Timer Filter Operation
◑ ◑ ◑ ●
No
Restart operation after connecting
the connector to PCB
Temperature(°C)
70
60
50
40
30
20
10
0
-10
No
Replace this part as it is the defective itself.
Troubleshooting
Timer Turbo
◑ ◑
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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