Error code
3CA
Meaning
The heat pump compressor motor isn't working
Critical
What to do
Why this happens
Potential causes include issues with the compressor motor connector terminal, malfunctioning of the compressor inverter PBA, damage to the compressor motor itself, or an overload condition.
How to fix it
This one needs a professional technician — it involves the heat pump compressor system.
SourceSamsung service manual