Connecting a Single XE70 Wall Controller to Multiple High Wall Splits


⚠️ Safety Notice – Reverse Cycle Air Conditioners

This equipment must only be installed, commissioned, serviced and repaired by suitably qualified and licensed personnel.


Before commencing work, complete a task-specific risk assessment and ensure electrical isolation procedures, safe access, adequate service clearances and appropriate PPE have been considered. All work must comply with applicable regulations, standards and manufacturer requirements.


Particular care must be taken when working around electrical systems, refrigerant circuits, moving parts, roof spaces, ceiling spaces, confined spaces and working-at-heights hazards where applicable.


Do not proceed if safe access, required clearances, confined space risks or appropriate safety controls cannot be achieved and maintained. 


Safety takes priority over diagnosis, repairs, installation schedules and customer expectations. If the task cannot be completed safely, it must not proceed until the risks have been adequately controlled.


In some installations, it may be necessary to connect a single XE70 wired wall controller to multiple High Wall Split indoor units (IDUs). This setup requires a configuration change in the XE70 controller.


Step 1: Wiring

Ensure all units are wired correctly according to the electrical wiring schematic provided below.


ELECTRICAL WIRING SCHEMATIC


Step 2: Power-Up Sequence

Once wiring is confirmed:

  • Power up all connected outdoor and indoor units


Step 3: Configure the XE70 Wall Controller

To enable control of multiple IDUs from a single XE70 controller, a parameter must be changed. This can be done either before or after system commissioning.

To change the parameter:

  1. Press the MENU button.
  2. Use the DOWN arrow to highlight Project SET, then press MENU/OK to enter.
  3. Scroll down to NUMBER OF IDU's.
  4. Press MENU/OK to enter the setting (default is 1).
  5. Use the UP/DOWN arrows to select the number of connected indoor units.
  6. Press MENU/OK to save the setting.

The XE70 controller will now be configured to control the selected number of indoor units.