Refrigerant Leakage Error - Samsung AM009FN1DCH/AA Service Manual

4-4-61 Refrigerant Leakage Error

Outdoor Unit Display
Indoor Unit Display ×(Operation)
Judgment Method
Special Cause
■ 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/cmG
1. Inspection method
high/low-pressure connector
get disconnected
Is there refrigerant
inside the set? (Please check by connecting the
menufolder gauge to the
Out of the PCB
high-pressure sensor terminals,
is there voltage between
pins 3 and 4 5V?
Replace high/low-pressure sensor
Samsung Electronics
(Reservation)
Did the
from the PCB?
Yes
service valve)
Yes
Yes
(Blast) (Filter) ×(Defrost)
No
No
No
The ▼ mark is the 1st pin on the PCB.
Please re-inspect
after connecting the connector
to the PCB
Refill refrigerant
after vacuum
Replace PCB
Troubleshooting
4-87