The device perceives an abnormally high internal temperature, higher than the limit allowed by the device.
Perform a reset of the circuit breaker.
- Find the circuit breaker connected to the unit.
- Disable it.
- Wait about 30 seconds.
- Reactivate the circuit breaker.
Issue not solved?
- Make sure that the connected electrical load (in watts) does not exceed the limit allowed by the device.
- Check that no external source influences the temperature of the thermostat.