Error code
44Er
Meaning
The inverter board controlling the compressor cannot talk to the main board
Moderate
What to do
Why this happens
The issue may be due to a loose or damaged communication cable between the Main PCB and Inverter PCB, a Defective Main, or a Defective Inverter.
How to fix it
This one needs a professional technician to diagnose and replace the inverter or main PCB.
SourceSamsung service manual