Error messages:
Thermostat EFIT 540/550 has a built-in system that
constantly checks the heating system, the thermostat itself
and a possible network for any malfunctions.
If an error occurs, the display will fl ash together with a
reading of the detected fault, which will be shown indicated
by the weekday numbers 1 to 7:
No: Fault: What to do:
7 Clock is not adjusted Set the clock
4 The thermostat is Let the thermostat cool
switched off because for a period.
of overheating Then enter basic setup to
leave fault mode
3 Confi gured as a One unit must be
Slave, but cannot confi gured as Master
fi nd any Master unit
24