Never use the refrigerant inside the outdoor unit to purge the lines. You must perform a proper pressure test and vacuum evacuation. Pressure Leak Test
Ultimate Installation Guide for the Samsung AJ068TXJ3KG/EU Multi-Split Outdoor Unit samsung aj068txj3kg eu installation manual
The red display will flash as it checks connections. This process takes roughly 5 to 15 minutes. Never use the refrigerant inside the outdoor unit
Align the center of the flared pipe with the corresponding valve port on the outdoor unit. samsung aj068txj3kg eu installation manual