Troubleshooting
Samsung Electronics 4-23
■ 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 •Referthenextpage
Cause of problem •Disconnectionorbreakdownofrelevantsensor.
Did the High Pressure
sensor connector get
disconnected
from the PCB?
Please re-inspect after connecting the connector
to the PCB.
Yes
No
Is there refrigerant
inside the set? (Please check by connecting
the manifold gageto
the service valve)
Refill refrigerant after vacuum
No
Yes
Out of the PCB High
Pressure sensor
terminals, is there
voltage between
pins 3 and 4 5V?
Replace PCB
No
Replace High Pressure sensor
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