This is because the thermostat's "Sensor Selection" is set to "OUT" for an external sensor, but no external sensor is actually connected to the thermostat, resulting in the ERR1 error code. Simply set
What is "temperature hysteresis" (or start-up temperature difference)? Why can't it be set to 0℃?
"Temperature hysteresis," also known as start-up temperature difference, is a deliberate ±ΔT buffer zone maintained by the thermostat. The system only starts heating/stops output when the room tempera
Why is the heating not working when the target temperature is set to 22°C but the room temperature is only 21.3°C?
This is because your thermostat is set to "temperature lag" (or start-up temperature difference). For example, if the thermostat's target temperature is 22°C and the temperature lag value is set to 1°
