Error code
HC5
Meaning
The heat pump compressor has stopped working
Critical
What to do
Why this happens
Possible causes include repeated compressor overheating as detected by Thermistor 5, a mechanical fault in the compressor, condenser blockage leading to heat buildup, or an issue within the refrigerant system.
How to fix it
This one needs a professional technician — it involves the heat pump compressor system.
SourceSamsung service manual / Customer Repair Guide