Mcu/Mcu Subcooler Entrance/Exit Sensor Error (Open/Short) - Samsung AM080 XV Series Service Manual

4-3-16 MCU/MCU subcooler entrance/exit sensor error (Open/Short)

Outdoor unit
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost
Indoorunit
display
×
※ ●: ON ◑: Flash ×: OFF
Judgment
∙ Refer to the judgment method below.
Method
Cause of
∙ MCU/MCU subcooler entrance/exit sensor is open/short
problem
1. Cause of problem
Is the sensor connector connected
Separate the connector from the PCB and
measure the resistance value
Is the resistor value matching with
Restart operation after replace the PCB
Samsung Electronics
(MCU subcooler)
(MCU)
Timer Fan Filter/MPI Operation Defrost
× ◑ ◑
on the PCB ?
Yes
between the 2 terminals.
Yes
"NOTE1" table?
Yes
Cassette (4/Mini4 Way)
◑ × ◑
No
Restart operation after
connecting the connector to PCB
No
Replace this part as it is
the defective itself.
Wall-mounted (NeoForte)
Timer Filter Operation Timer
◑ ◑
●
NOTE1
Temperature(°C)
70
60
50
40
30
20
10
0
-10
Troubleshooting
Turbo
◑ ◑
Resistance(KΩ)
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
4-33