103
8 System Operation
Fault
Code
No.
Restart according to Description
TRD EN676
724 0 0 Gas valves open when burning oil
Ü
725 0 0 Oil valves open when burning gas
Ü
726 0 0 Main gas 2 open without main gas 1
Ü
727 0 0 Main gas 1 illegally open
Ü
728 0 0 Main gas valves and ignition valve open too long
Ü
729 0 0 Ignition process taking too long (without pilot burner)
Ü
730 0 0 Maintenance mode without pilot burner
Ü
731 0 0 Ignition valve opened without ignition burner
Ü
732 0 0 Incorrect signal combination during operation
Ü
733 0 0 Incorrect signal combination after operation
Ü
734 0 0 Pre-ventilating time not complied with
Ü
735 0 0 Fuel safety chain missing
Ü
736 0 0 Leak check: both gas valves open
Ü
737 0 0 Seal tightness check: Main Gas 2 delayed for too long at deactivation.
Ü
738 0 0 Leak check: main gas 2 missing
Ü
739 0 0 Seal tightness check: Main Gas 2 open for too long.
Ü
740 0 0 Seal tightness check: Main Gas 1 leaky.
Ü
741 0 0 Seal tightness check: Main Gas 1 open for too long.
Ü
742 0 0 Seal tightness check: Main Gas 2 leaky.
Ü
743 0 0 Flame monitoring: flame after-burn too long
Ü Burning duration (parameter 789) set to be too short.
744 0 0 Flame monitoring: flame on again
Ü
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