14
Water pressure too low / Wrong parameter setting
Water pressure too high
Guasto sonda NTC sanitario
Heating NTC probe failure
Fumes NTC probe failure
Block due to smoke probe intervention
Fan control anomaly
Ignition failure
Intervention of the safety thermostat
Parasitic flame
Lack of circulation
Return NTC probe failure
System overtemperature (TCH> TSP81)
Delta T CH/Ret > TSP82 (1)
Gas valve modulator disconnected
Boiler probe failure (if connected)
Incorrect DHW control type or incorrect flow meter reading
Maximum number of RESETs reached
Low power supply voltage
Power frequency anomaly.
Malfunction