When wiring multisplit systems, what is essential for proper connection?

For multisplit systems, the essential aspect for proper connection is that indoor units must connect to the respective terminal block on the outdoor unit. This is critical because the terminal block facilitates the correct electrical communication between the outdoor and indoor units, allowing them to operate cohesively. Each indoor unit is designed to work in tandem with the outdoor unit's corresponding terminal, ensuring that signals for control and power are accurately transmitted.

If the connections are not made to the correct terminal blocks, the indoor units may not function correctly, leading to inefficiencies or complete system failure. Each indoor unit is engineered to receive specific signals and power from designated terminals, so proper wiring is paramount for reliable performance and system efficiency.

In contrast, wiring all units in series or having indoor units operate independently without connections to the outdoor unit would not create a functional system. Moreover, while labeling terminal blocks with color codes can enhance ease of installation and troubleshooting, it is not a fundamental requirement for operational success, unlike the correct connection to the terminal blocks.