Samsung AM048FXMDCH - Refrigerant Leakage or Error on High Pressure Sensor (Short or Open). (E-291)

42 Samsung Electronics
3-9. Refrigerant leakage or error on high pressure sensor. (Short or open) (E-291)
Outdoor unit Display E-291
Indoor unit Display
Duct, Cassette (1 / 2Way), Console, Ceiling
Operation Defrost Timer Fan Filter / MPI
◑ × ×
◑
×
Cassette (4Way / Mini 4Way)
Operation Defrost Timer Filter
◑ ×
◑
×
Duct, Cassette (1/2 Way), Console, Ceiling
Operation Timer Turbo 24°C 27°C
◑ × ×
◑
×
※ ● : ON ◑ : Flash ×: OFF
Judgement Method t3FGFSUIFOFYUQBHF
Cause of problem t%JTDPOOFDUJPOPSCSFBLEPXOPGSFMFWBOUTFOTPS
Did the High Pressure
sensor connector get disconnected
from the PCB?
Is there refrigerant
inside the set? (Please check by connecting
the manifold gageto the
service valve)
Out of the PCB High
Pressure sensor terminals, is there
voltage between pins 3 and 4 5V?
Replace High Pressure sensor.
Please re-inspect after connecting the
connector to the PCB.
Refill refrigerant after vacuum.
Replace PCB.
Yes
Yes
No
No
No
Yes