E.00 .04 Return temperature sensor disconnected

E.00 .05 Return temperature sensor short-circuited

E.00 .16 DHW tank temperature sensor not connected

E.00 .17 DHW tank temperature sensor short-circuited

E.00 .20 The flue gas temperature sensor is not connected or measured a temperature below the range

E.00 .21 The flue gas temperature sensor has short-circuited or measured a temperature above the range

E.01 .04 Flame loss detected five times in 24 hours

E.01 .12 Temperature measured by return sensor greater than flow temperature

E.01 .17 No water circulation (permanent)

E.01 .20 Maximum flue gas temperature reached

E.02 .13 Total stoppage of the boiler (antifreeze function not active)

E.02 .17 Permanent communication failure in the PCB

E.02 .35 Critical safety device disconnected

E.02 .39 Minimum pressure not reached after 6 minutes of automatic fill

E.02 .47 Connection to external device unsuccessful

E.04 .01 Flow temperature sensor short-circuited

E.04 .02 Flow temperature sensor disconnected

E.04 .03 Maximum flow temperature exceeded or flow temperature sensor short-circuited

E.04 .08 Maximum safe temperature value reached

E.04 .10 Burner failed to ignite after 4 attempts

E.04 .12 Ignition failure for monitoring parasitic flame

E.04 .13 Fan blade blocked or maximum rpm exceeded

E.04 .17 Fault in gas valve control circuit

E.04 .18 The flow temperature is below the minimum temperature or the flow temperature sensor is not connected

E.04 .23 Communication internal stoppage

E.04 .29 Communication internal stoppage

E.04 .254 Fault in gas valve control circuit