Samsung AM080KXMDFH/TC - Page 93

Troubleshooting
Samsung Electronics 4-51
Did the 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
gauge to the service
valve)
Refill refrigerant after vacuum
No
Yes
Out of the PCB
pressure sensor
terminals, is there
voltage between
pins 3 and 4 5V?
Replace PCB
No
Replace Low Pressure sensor
Yes
■ Error due to refrigerant leakage. (E-439) / Operation prohibited due to low pressure. (E-443)
Outdoor unit Display E-439 / E-443
Judgement Method
•Beforestarting:Beforecompressorstartingaftersystemhalt2minutes
(High & low pressure sensor Open / Short error occurs and 1kg/cm2 or less)
When start : When the high pressure sensor value(cooling 3.1kg/ cm2 , heating
2.2kg/ cm2 ) is detection continuously for 3 seconds
Cause of problem
•Refrigerantleakageandshortage
•Disconnectionorbreakdownofhigh&lowpressuresensor
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 Open/Short error will occur if the input voltage standard range of 0.5V ~ 4.95V is exceeded.