Do split system AC units in homes require disconnects?

Yes. Under Australian Standards (AS/NZS 3000) , a safety isolator switch is required within sight of the outdoor unit. This is the electrical disconnect. It's separate from the full decommissioning process, which also involves refrigerant recovery and pipe disconnection.

What is a disconnect for a mini-split system?

The word "disconnect" can mean two different things depending on context. It can refer to the outdoor isolator switch (the electrical safety switch near the compressor), or it can mean the full decommissioning service, where the system is completely removed. If you're planning a removal, you need the full decommissioning process carried out by a licensed technician.

Where is the AC disconnect switch located?

The isolator switch is typically a weatherproof box mounted on the wall near the outdoor unit. In some setups, it may also be located in the switchboard or meter box. If you're not sure where yours is, your technician can point it out when they arrive.