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10
x
Faults and malfunctions
Malfunction
STL switch off
Water throughput too low due to air inclusion
Water flow too low due to valves closing too
quickly along the entire heating network
Pump standstill
Storage tank switched off in operation without
hot water storage tank
Flue gas temperature
Flue gas temperature too high
sensor switch off
1)
see documentation "ROTEX RoCon BF Controller"
Tab. 10-1 Possible faults on the A1 BO
10.3 Fault codes
Code
Component/Designation
E1
E4
E5
E11
E15
Automatic firing unit
E34
E35
Interlocking fault
E36
E37
E38
E39
E99
E6
E10
E17
Automatic firing unit
E19
Non-interlocking fault
E32
E48
E50
Tab. 10-2 Fault codes (can be detected by automatic firing)
50
Possible cause
Safety temperature limit: Flow temperature >105 °C, return temperature >95 °C
No flame detection at burner start.
More than 5 flame interruptions during a continuous burner demand.
Flame detection before burner start.
Oil preheater does not switch within a 5 min. period.
BCC data conflict
Necessary BCC not detected.
BCC data conflict
BCC firmware does not match automatic firing firmware.
Wrong BCC number.
BCC system fault
Safety shutdown
Flow temperature (t
) is higher than the set maximum boiler temperature (parameter
V
[Max T-HS] + 5 K).
5x Reset within 15 minNew Reset only possible after 15 mins.
Scatter (t
- t
) too big.
V
R
Flow temperature increase too rapid.
Supply voltage too low.
No communication with the automatic firing for longer than 2 mins.
BCC activation
Possible solution
Vent system
Use slow closing or timed valves, if needed, install
overflow valve
Check mains and PWM control signal connection,
replace pump if necessary.
Disconnect storage temperature sensor
Switch off storage tank charging circuit
Clean the boiler
Fault
FA ROTEX A1 BOe - 02/2014
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