Samsung DVM S ECO BIG Series Service Manual page 65

■ Refrigerant leakage or error on high pressure sensor (Short or open). (E-291)
Outdoor unit Display
Indoor unit Display
Judgement Method
Cause of problem
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
Samsung Electronics
Duct, Cassette (1 / 2Way), Console, Ceiling
Operation
◑
Cassette (4Way / Mini 4Way)
Operation
◑
Duct, Cassette (1/2 Way), Console, Ceiling
Operation
◑
• Refer the next page
• Disconnection or breakdown of relevant sensor.
Yes
Yes
E-291
Defrost Timer
×
×
Defrost Timer
◑
×
Timer Turbo
× ×
※ ● ◑
: ON : Flash ×: OFF
No
Please re-inspect after connecting the connector
to the PCB.
No
Refill refrigerant after vacuum
No
Troubleshooting
Fan Filter / MPI
◑
×
Filter
×
24°C 27°C
◑
×
Replace PCB
4-23