FAULT CODES 2

None

Fault code	Cause	Action (click on appropriate action)
E3	Fault in safety chain	Check the temperature limiter and connecting cables
E5	Internal fault	Check the ionisation electrode and connecting cables
F0	Internal fault	Control unit
F1	Max. flue gas temperature exceeded	Check heating system fill level, circulation pump & system
F2	Temperature limiter has responded	Check system fill level, pump & system. temperature limiter
F3	Flame signal is present at burner start	Check ionisation electrode and connecting cable
F4	No flame signal detected	Check ignition operation
F8	Fuel valve closes too late	Check gas train, check both control paths
F9	Fan speed too low during burner start	Check fan, cables and power supply to fan; check fan control
FA	Fan idle state not reached	Check fan, cables and power supply to fan; check fan control
FC	Electrical fan control (control unit) faulty	Check fan connecting cable, control unit
Fd	Fault, burner control unit	Check ignition electrodes, cables, interference (EMC) field
FF	Fault, burner control unit	Check ignition electrodes, cables, interference (EMC) field