Samsung · Air Conditioning
This self-diagnostic error indicates either a blockage in the high-pressure side of the system or a complete loss of refrigerant. This will prevent the unit from operating.
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Ensure the outdoor unit service valve is fully open.
Check all refrigerant pipe connections for leaks or damage.
Power cycle the air conditioner to reset the system.
If the issue persists, a qualified technician should inspect the EEV and check for refrigerant leakage.