This incident blocks the control of the zone. Check this error is not common to all thermostats. If so, verify the proper operation of the main board. To solve this incident check:

Main control board status: Correctly powered.
Main control board status: Airzone connection bus LED are operating properly.
Connection: Verify the polarity of the main control board and thermostat connectors.
Wiring: Check that the voltage between the poles (A/ -) and (B/ -) is correct (1.8 Vdc).
Restart the zone and re-associate it with the system:
- Blueface thermostats: Press on Reset to restart the device. If the error persists, press and hold on Setting icon and reset the thermostat. Configure the system.
- Think thermostats: To do this, press and hold on Airzone and restart the start-up configuration process.
Restart system: If the system is restarted, this error may be displayed in the thermostats at the beginning of the process. This message should disappear after around 30 seconds.