Samsung AM072/096/120/144FXVAFH, Service Manual

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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 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
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 Timer Fan Filter/MPI Operation Defrost Timer Filter Operation Timer Turbo
× × ◑ ◑ ◑ × ◑ ◑ ◑ ● ◑ ◑
※ ● : ON ◑ : Flash × : OFF
NOTE1
Temperature(°C) Resistance(KΩ)
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