Part 14 - Troubleshooting
9, 10, 11, 26, 27, 28, 29, 30, 32, 44, 47, 76,77
Lock-out ionization problem - parasitic flame
Lock-out high limit temperature protection
5, 6, 8, 16, 17, 18, 19, 33, 34, 35, 39, 42, 43, 72, 73
Lock-out Primary temperature too high (>95 ºC)
5, 6, 8, 16, 17, 18, 19, 35, 39, 40, 42, 43, 72, 73
40min Lock - Insufficient temp. gradient on supply sensor
5, 6, 8, 16, 39, 41, 42, 43, 51, 54
Too long in Legionella mode
Lock-out Flame lost for 6 times
9, 11, 28, 29, 44, 47, 74, 76
Lock out Gas valve does not close
Flue gas temperature too high
5, 6, 8, 16, 17, 18, 19, 33, 34, 35, 39, 41, 42, 43
Return temperature sensor fault
Supply temperature too high during DHW operation
5, 8, 16, 17, 18, 19, 34, 35, 39, 41, 42, 43
Fan feedback signal fault
CH pressure sensor deactivated
Fault during calibration (cause of fault is shown in display of boiler as well)
The house is not sufficiently heated although the unit
The ignition makes a lot of noise.
The room thermostat demands heating,
but the burner does not go on.
The unit burns continuously, and the house
During CH operation the boiler makes a lot
The top of the radiators is insufficiently
On hot water demand, the water is cold.
On hot water demand, the hot water temperature
The hot water temperature is too high.
During hot water demand, the boiler makes
Table 14.2 Trouble shooting list