Troubleshooting
4-104
Samsung Electronics
4-4-61 Refrigerant Leakage Error
Ŷ
Low-pressure sensor OPEN/SHORT error determination method
1. Identifies from when power is supplied or 2 minutes after RESET, and only when set is stopped.
2. An E439 error will occur if the input voltage standard ranges of 0.5V ~ 4.95V of both the high- and low-pressure sensors are
exceeded.
3. Will occur if the measured value of both high- and low-pressure sensors is 1kgf/cm2G
1. Inspection
method
Did the
high/low-pressure connector
get disconnected
from the PCB?
Out of the PCB
high-pressure sensor terminals,
is there voltage between
pins 3 and 4 5V?
Replace high/low-pressure sensor
Is there refrigerant
inside the set? (Please check by connecting the
menufolder gauge to the
service valve)
Refill refrigerant
after vacuum
Replace PCB
No
Please re-inspect
after connecting the connector
to the PCB
No
Yes
Yes
Yes
No
The
ź
mark is the 1st pin on the PCB.
Outdoor Unit Display
Indoor Unit Display
×(Operation)
(Reservation)
(Blast)
(Filter) ×(Defrost)
Judgment Method
• Refer to the judgment method below.
Special Cause
• Leakage of refrigerant, simultaneous malfunction of pressure sensor.
