Low Pressure Sensor Error (Open/Short) - Samsung AM056FN2DEH Series Service Manual

Troubleshooting

4-4-50 Low Pressure sensor error (Open/Short)

Outdoor unit display
Indoor unit display
Criteria ∙ Refer to the judgment method below.
Cause of problem ∙ Disconnection or breakdown of relevant sensor.
1. 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 Open/Short error will occur if the input voltage standard range of 0.5V ~ 4.95V is exceeded.
2. Inspection Method
Did the Low Pressure sensor connector
get disconnected from the PCB?
Is there refrigerant inside the set?
(Please check by connecting the menu
folder gauge to the service valve)
Out of the PCB Low Pressure
sensor terminals, is there voltage between
pins 3 and 4 5V?
Replace Low Pressure sensor
470
Yes
Yes
Yes
No
Please re-inspect after connecting
the connector to the PCB
No
Refill refrigerant after vacuum
No
The ▼ mark is the 1st pin on the PCB.
Replace PCB
Samsung Electronics