Fujitsu General Australia

1. System Overview

The wired remote controller system allows up to two controllers to be connected to a single indoor unit — designated as Primary and Secondary controllers.
However, when multiple indoor units are grouped, up to 16 indoor units can be controlled using one or two remote controllers.
A third wired remote controller connection is not supported and is considered prohibited.

2. System Diagram

Single Remote Controller Connection

• One wired controller connects directly to the indoor unit.

• Cable “A” represents the communication link (remote controller cable).

Indoor Unit  ─── A ───  Remote Controller

Dual Remote Controller Connection

• Two wired controllers (Primary and Secondary) connect in parallel to the indoor unit.

• Cables “B” and “C” represent the communication lines.

Indoor Unit  ─── B ───  Primary Controller                   └──  C ───  Secondary Controller

Note: Only two controllers can be connected per indoor unit.
Connection of three controllers is not permitted.

3. Controller Combination Rules

✅ Permitted Combinations

❌ Prohibited Combination

*Asterisk () indicates model variations.*

4. Group Control (Multi-Indoor Configuration)

Up to 16 indoor units can be controlled simultaneously with 1 or 2 wired controllers connected in a group configuration.

Example:

Remote Controller ─── Indoor 1 ─── Indoor 2 ─── Indoor 3 ─── ... ─── Indoor 16

All indoor units are connected using a polar 3-core remote controller cable, maintaining correct polarity and daisy-chain configuration.

5. Installation Notes

• Maintain proper polarity across all communication terminals.

• Use only approved remote controller cables as specified in the wiring standards section.

• Do not mix incompatible controller models in the same network.

• A maximum cable length and resistance per total system must follow manufacturer limits.

• Three wired controllers connected to one indoor unit is strictly prohibited.