Multi-air conditioner

A multi-air conditioner, comprising:

• an outdoor unit;
• a plurality of indoor units;
• a header module comprising an inlet pipe branched and configured to supply refrigerant compressed by the outdoor unit to the plurality of indoor units and a collection pipe joined and configured to collect refrigerant heat-exchanged in the plurality of indoor units for return to the outdoor unit;
• and
• a connection kit detachably coupled between the header module and the plurality of indoor units,
• wherein the connection kit comprises:
• a connection inlet pipe configured to introduce refrigerant from the inlet pipe of the header module to the plurality of indoor units;
• a connection collection pipe configured to collect refrigerant from the plurality of indoor units to the collection pipe of the header module;
• a connection regulating valve provided to the connection inlet pipe and the connection collection pipe and configured to suppress refrigerant from being supplied to the plurality of indoor units;
• and
• a connection bypass portion connecting the connection inlet pipe and the connection collection pipe and configured to bypass refrigerant introduced into the connection inlet pipe to the connection collection pipe.