Error code
3CA
Meaning
The heat pump compressor motor isn't working
Critical
What to do
Why this happens
Possible causes include a faulty compressor motor, an issue with the Compressor Inverter PBA, incorrect wiring connections to the compressor, or a mechanical failure within the compressor.
How to fix it
This one needs a professional technician — it involves the heat pump compressor system.
SourceSamsung service manual / Customer Repair Guide