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Smart Hub Troubleshooting

Applies to: COCBH (Smart Hub) · COCB (older model)

Nova wall controller screen is blank or unresponsive​

The Nova or Nova Mini touch screen fails to power on or goes black.

Steps to resolve:

  1. Check the power supply (CTDC12) connection to the Nova wall controller
  2. Check the Cat5e cable between the CSL Screen Link Module and the Nova — try a different port on the CSL
  3. Re-pair the CSL to the C225 CPU if the connection has been lost
  4. Replace the cable if the issue persists
  5. If still unresolved, the CSL or C225 CPU may need replacement — contact your installer

Zones are not opening or responding​

One or more zones are unresponsive when commanded.

Steps to resolve:

  1. Move the zone motor cable to a different port on the C225
  2. In the Nova app, go to Setup → Configure AC → Options → Skip Zone Port (password: wamfud) and skip the faulty port
  3. Verify the CT24ACE transformer is powered and outputting ~24VAC
  4. Check all wiring connections are fully seated
note

On Daikin systems, it can take up to two minutes for dampers to open after a command is sent.

Smart Hub not connecting to Wi-Fi​

The COCBH cannot find or connect to the home Wi-Fi network.

Steps to resolve:

  1. Ensure the hub is within range of the Wi-Fi router (try moving it closer temporarily)
  2. Confirm the Wi-Fi password is correct — the hub only supports 2.4GHz networks (not 5GHz)
  3. Check the router is not using MAC address filtering that would block the hub
  4. If an Optus modem is in use, disable IGMP Snooping in the modem's advanced settings
  5. Factory reset the COCBH by holding the reset button for 10 seconds, then recommission

Smart Hub cannot be discovered by the app​

The iZone app cannot find the Smart Hub during setup.

Steps to resolve:

  1. Ensure the phone running the iZone app is connected to the same 2.4GHz Wi-Fi network as the hub
  2. Check that the commissioning process was completed in the correct order — the Smart Hub must not be connected to the internet before commissioning is finished
  3. If the hub was connected to the internet prematurely, factory reset it and recommission
  4. Disable any VPN on the phone during the setup process

App shows hub offline intermittently​

The Smart Hub appears online then drops offline repeatedly.

Steps to resolve:

  1. Check the Wi-Fi signal strength at the hub's location — relocate closer to the router if signal is weak
  2. Ensure the router's DHCP lease is set to a long duration or assign a static IP to the hub
  3. Check for interference from other 2.4GHz devices (cordless phones, baby monitors)
  4. Update the hub firmware if an update is available

Nova controller not communicating with C225 CPU​

The Nova wall controller shows no connection to the system.

Steps to resolve:

  1. Confirm the COCBH Smart Hub is powered and the Nova shows the Wi-Fi symbol
  2. Re-pair the CSL to the C225 if pairing has been lost
  3. Ensure the Smart Hub was not connected to the internet before commissioning was complete — if it was, factory reset and recommission
  4. Add a CR Wireless Repeater if the Smart Hub is out of range of the C225