Error 8 indicates that a thermostat has lost communications with the system. The zone loses the room temperature measurement of an associated Lite thermostat, leaving the zone disabled to generate demand. Check from your Blueface thermostat whether the Lite thermostat has lost communications.

If your installation is equipped with wired Lite thermostats see: ( My thermostat displays Error 8 (I have wired Lite thermostats) ).

If your installation is equipped with wireless Lite thermostats, follow the instructions below:

Check the battery's status and, if in doubt, replace it with a new battery ( My thermostat displays Error 8 (I have wireless Lite thermostats) ).

Check whether the Lite thermostat in question has the microswitch that corresponds to the associated zone selected. If not, activate it by pulling up the tab to the desired value. Remember that, in order to associate wireless devices, you should first open the wireless association module either through the SW1 button on the main control board or from any thermostat in the Wireless module parameter of the System advanced settings, zone parameters.

Remember: Should it be necessary to change the zone number, first reset the thermostat and initiate the association sequence ( How can I reset a zone equipped with a Lite thermostat? ).